source: sasview/fittingview/src/sans/perspectives/fitting/basepage.py @ 817991b

import sys
import os
import wx
import numpy
import time
import copy 
import math
import string
from wx.lib.scrolledpanel import ScrolledPanel
from sans.guiframe.panel_base import PanelBase
from sans.guiframe.utils import format_number,check_float
from sans.guiframe.events import PanelOnFocusEvent
from sans.guiframe.events import StatusEvent
from sans.guiframe.events import AppendBookmarkEvent
from sans.guiframe.dataFitting import Data2D
from sans.guiframe.dataFitting import Data1D
from sans.guiframe.dataFitting import check_data_validity
from sans.dataloader.data_info import Detector
from sans.dataloader.data_info import Source
import pagestate
from pagestate import PageState

(PageInfoEvent, EVT_PAGE_INFO)   = wx.lib.newevent.NewEvent()
(PreviousStateEvent, EVT_PREVIOUS_STATE)   = wx.lib.newevent.NewEvent()
(NextStateEvent, EVT_NEXT_STATE)   = wx.lib.newevent.NewEvent()

_BOX_WIDTH = 76
_QMIN_DEFAULT = 0.0005
_QMAX_DEFAULT = 0.5
_NPTS_DEFAULT = 50
#Control panel width 
if sys.platform.count("win32")> 0:
    PANEL_WIDTH = 450
    FONT_VARIANT = 0
    ON_MAC = False
else:
    PANEL_WIDTH = 500
    FONT_VARIANT = 1
    ON_MAC = True



class BasicPage(ScrolledPanel, PanelBase):
    """
    This class provide general structure of  fitpanel page
    """
     ## Internal name for the AUI manager
    window_name = "Fit Page"
    ## Title to appear on top of the window
    window_caption = "Fit Page "
    
    def __init__(self, parent,color='blue', **kwargs):
        """
        """
        ScrolledPanel.__init__(self, parent, **kwargs)
        PanelBase.__init__(self, parent)
        self.SetupScrolling()
        #Set window's font size 
        self.SetWindowVariant(variant=FONT_VARIANT)
      
        self.SetBackgroundColour(color)
        ## parent of the page
        self.parent = parent
        ## manager is the fitting plugin
        ## owner of the page (fitting plugin)
        self.event_owner = None
         ## current model
        self.model = None
        self.index_model = None
        ## data
        self.data = None
        #list of available data
        self.data_list = []
        self.mask = None
        self.uid = wx.NewId()
        self.graph_id = None
        #Q range for data set
        self.qmin_data_set = None
        self.qmax_data_set = None
        self.npts_data_set = 0
        ## Q range
        self.qmin = None
        self.qmax = None
        self.qmax_x = _QMAX_DEFAULT
        self.qmin_x = _QMIN_DEFAULT
        self.npts_x = _NPTS_DEFAULT
        ## total number of point: float
        self.npts = None
        ## default fitengine type
        self.engine_type = 'scipy'
        ## smear default
        self.current_smearer = None
        ## 2D smear accuracy default
        self.smear2d_accuracy = 'Low'
        ## slit smear: 
        self.dxl = None
        self.dxw = None
        ## pinhole smear 
        self.dx_min = None
        self.dx_max = None
       
        self.disp_cb_dict = {}
   
        self.state = PageState(parent=parent)
        ## dictionary containing list of models
        self.model_list_box = {}
       
        ## Data member to store the dispersion object created
        self._disp_obj_dict = {}
        ## selected parameters to apply dispersion
        self.disp_cb_dict ={}
        ## smearer object
        self.enable2D = False
        self.is_mac = ON_MAC
        
        ##list of model parameters. each item must have same length
        ## each item related to a given parameters
        ##[cb state, name, value, "+/-", error of fit, min, max , units]
        self.parameters = []
        # non-fittable parameter whose value is astring
        self.str_parameters = []
        ## list of parameters to fit , must be like self.parameters
        self.param_toFit = []
        ## list of looking like parameters but with non fittable parameters info
        self.fixed_param = []
        ## list of looking like parameters but with  fittable parameters info
        self.fittable_param = []
        ##list of dispersion parameters
        self.disp_list = []
        self.disp_name = ""
        
        ## list of orientation parameters
        self.orientation_params = []
        self.orientation_params_disp = []
        if self.model != None:
            self.disp_list = self.model.getDispParamList()
        self.temp_multi_functional = False
        ##enable model 2D draw
        self.enable2D = False
        ## check that the fit range is correct to plot the model again
        self.fitrange = True
        ## Create memento to save the current state
        self.state = PageState(parent=self.parent,
                               model=self.model, data=self.data)
        ## flag to determine if state has change
        self.state_change = False
        ## save customized array
        self.values = []
        self.weights = []
        ## retrieve saved state
        self.number_saved_state = 0
        ## dictionary of saved state
        self.saved_states = {} 
        ## Create context menu for page
        self.popUpMenu = wx.Menu()
    
        id = wx.NewId()
        self._keep = wx.MenuItem(self.popUpMenu,id,"Add bookmark",
                                 " Keep the panel status to recall it later")
        self.popUpMenu.AppendItem(self._keep)
        self._keep.Enable(False)
        self._set_bookmark_flag(False)
        self._set_save_flag(False)
        wx.EVT_MENU(self, id, self.on_bookmark)
        self.popUpMenu.AppendSeparator()
    
        ## Default locations
        self._default_save_location = os.getcwd()     
        ## save initial state on context menu
        #self.onSave(event=None)
        self.Bind(wx.EVT_CONTEXT_MENU, self.onContextMenu)
        
        # bind key event
        self.Bind(wx.EVT_LEFT_DOWN, self.on_left_down)
        
        ## create the basic structure of the panel with empty sizer
        self.define_page_structure()
        ## drawing Initial dispersion parameters sizer 
        self.set_dispers_sizer()
        
        ## layout
        self.set_layout()
    
    def set_index_model(self, index):
        """
        Index related to this page
        """
        self.index_model = index
        
    def create_default_data(self):
        """
        Given the user selection, creates a 1D or 2D data 
        Only when the page is on theory mode.
        """
        if not hasattr(self, "model_view"):
            return
        toggle_mode_on = self.model_view.IsEnabled()
        if toggle_mode_on:
            if self.enable2D and not check_data_validity(self.data):
                self._create_default_2d_data()
            else:
                self._create_default_1d_data()
        
    def _create_default_1d_data(self):
        """
        Create default data for fitting perspective 
        Only when the page is on theory mode.
        :warning: This data is never plotted.
        
        """
        x = numpy.linspace(start=self.qmin_x, stop=self.qmax_x, 
                           num=self.npts_x, endpoint=True)
        self.data = Data1D(x=x)
        self.data.xaxis('\\rm{Q}',"A^{-1}")
        self.data.yaxis('\\rm{Intensity}', "cm^{-1}")
        self.data.is_data = False
        self.data.id = str(self.uid) + " data" 
        self.data.group_id = str(self.uid) + " Model1D" 
       
    def _create_default_2d_data(self):
        """
        Create 2D data by default
        Only when the page is on theory mode.
        :warning: This data is never plotted.
        """
        self.data = Data2D()
        qmax = self.qmax_x / math.sqrt(2)
        self.data.xaxis('\\rm{Q_{x}}', 'A^{-1}')
        self.data.yaxis('\\rm{Q_{y}}', 'A^{-1}')
        self.data.is_data = False
        self.data.id = str(self.uid) + " data" 
        self.data.group_id = str(self.uid) + " Model2D" 
        ## Default values    
        self.data.detector.append(Detector())  
        index = len(self.data.detector) - 1
        self.data.detector[index].distance = 8000   # mm        
        self.data.source.wavelength= 6         # A      
        self.data.detector[index].pixel_size.x = 5  # mm
        self.data.detector[index].pixel_size.y = 5  # mm
        self.data.detector[index].beam_center.x = qmax
        self.data.detector[index].beam_center.y = qmax
        ## create x_bins and y_bins of the model 2D
        pixel_width_x = self.data.detector[index].pixel_size.x
        pixel_width_y = self.data.detector[index].pixel_size.y
        center_x = self.data.detector[index].beam_center.x/pixel_width_x
        center_y = self.data.detector[index].beam_center.y/pixel_width_y
        # theory default: assume the beam 
        #center is located at the center of sqr detector
        xmax = qmax 
        xmin = -qmax
        ymax = qmax
        ymin = -qmax
        qstep = self.npts_x

        x = numpy.linspace(start=xmin, stop=xmax, num=qstep, endpoint=True)  
        y = numpy.linspace(start=ymin, stop=ymax, num=qstep, endpoint=True)
        ## use data info instead
        new_x = numpy.tile(x, (len(y), 1))
        new_y = numpy.tile(y, (len(x), 1))
        new_y = new_y.swapaxes(0,1)
        # all data reuire now in 1d array
        qx_data = new_x.flatten()
        qy_data = new_y.flatten()
        q_data = numpy.sqrt(qx_data*qx_data + qy_data*qy_data)
        # set all True (standing for unmasked) as default
        mask = numpy.ones(len(qx_data), dtype=bool)
        # calculate the range of qx and qy: this way,
        # it is a little more independent
        x_size = xmax - xmin
        y_size = ymax - ymin
        # store x and y bin centers in q space
        x_bins  = x
        y_bins  = y 
        # bin size: x- & y-directions
        xstep = x_size/len(x_bins-1)
        ystep = y_size/len(y_bins-1)
  
        self.data.source = Source()
        self.data.data = numpy.ones(len(mask))
        self.data.err_data = numpy.ones(len(mask))
        self.data.qx_data = qx_data 
        self.data.qy_data = qy_data  
        self.data.q_data = q_data 
        self.data.mask = mask            
        self.data.x_bins = x_bins  
        self.data.y_bins = y_bins   
        # max and min taking account of the bin sizes
        self.data.xmin = xmin 
        self.data.xmax = xmax
        self.data.ymin = ymin 
        self.data.ymax = ymax 

    def on_set_focus(self, event):
        """
        """
        if self._manager is not None:
            wx.PostEvent(self._manager.parent, PanelOnFocusEvent(panel=self))
        
    class ModelTextCtrl(wx.TextCtrl):
        """
        Text control for model and fit parameters.
        Binds the appropriate events for user interactions.
        Default callback methods can be overwritten on initialization
        
        :param kill_focus_callback: callback method for EVT_KILL_FOCUS event
        :param set_focus_callback:  callback method for EVT_SET_FOCUS event
        :param mouse_up_callback:   callback method for EVT_LEFT_UP event
        :param text_enter_callback: callback method for EVT_TEXT_ENTER event
        
        """
        ## Set to True when the mouse is clicked while the whole string is selected
        full_selection = False
        ## Call back for EVT_SET_FOCUS events
        _on_set_focus_callback = None
        
        def __init__(self, parent, id=-1, 
                     value=wx.EmptyString, 
                     pos=wx.DefaultPosition, 
                     size=wx.DefaultSize,
                     style=0, 
                     validator=wx.DefaultValidator,
                     name=wx.TextCtrlNameStr,
                     kill_focus_callback=None,
                     set_focus_callback=None,
                     mouse_up_callback=None,
                     text_enter_callback = None):
             
            wx.TextCtrl.__init__(self, parent, id, value, pos,
                                  size, style, validator, name)
            
            # Bind appropriate events
            self._on_set_focus_callback = parent.onSetFocus \
                      if set_focus_callback is None else set_focus_callback
            self.Bind(wx.EVT_SET_FOCUS, self._on_set_focus)
            self.Bind(wx.EVT_KILL_FOCUS, self._silent_kill_focus \
                      if kill_focus_callback is None else kill_focus_callback)                
            self.Bind(wx.EVT_TEXT_ENTER, parent._onparamEnter \
                      if text_enter_callback is None else text_enter_callback)
            if not ON_MAC :
                self.Bind(wx.EVT_LEFT_UP,    self._highlight_text \
                          if mouse_up_callback is None else mouse_up_callback)
            
        def _on_set_focus(self, event):
            """
            Catch when the text control is set in focus to highlight the whole
            text if necessary
            
            :param event: mouse event
            
            """
            event.Skip()
            self.full_selection = True
            return self._on_set_focus_callback(event)
        
 
            
        def _highlight_text(self, event):
            """
            Highlight text of a TextCtrl only of no text has be selected
            
            :param event: mouse event
            
            """
            # Make sure the mouse event is available to other listeners
            event.Skip()
            control  = event.GetEventObject()
            if self.full_selection:
                self.full_selection = False
                # Check that we have a TextCtrl
                if issubclass(control.__class__, wx.TextCtrl):
                    # Check whether text has been selected, 
                    # if not, select the whole string
                    (start, end) = control.GetSelection()
                    if start==end:
                        control.SetSelection(-1,-1)
                        
        def _silent_kill_focus(self,event):
            """
            Save the state of the page
            """
            
            event.Skip()
            pass
    
    def set_page_info(self, page_info):
        """
        set some page important information at once
        """
       ##window_name
        self.window_name = page_info.window_name
        ##window_caption
        self.window_caption = page_info.window_caption
        ## manager is the fitting plugin
        self._manager= page_info.manager
        ## owner of the page (fitting plugin)
        self.event_owner= page_info.event_owner
         ## current model
        self.model = page_info.model
        ## data
        self.data = page_info.data
        ## dictionary containing list of models
        self.model_list_box = page_info.model_list_box
        ## Data member to store the dispersion object created
        self.populate_box(dict=self.model_list_box)
        
    def onContextMenu(self, event): 
        """
        Retrieve the state selected state
        """
        # Skipping the save state functionality for release 0.9.0
        #return
    
        pos = event.GetPosition()
        pos = self.ScreenToClient(pos)
       
        self.PopupMenu(self.popUpMenu, pos) 
      
        
    def onUndo(self, event):
        """
        Cancel the previous action
        """
        event = PreviousStateEvent(page = self)
        wx.PostEvent(self.parent, event)
        
    def onRedo(self, event):
        """
        Restore the previous action cancelled 
        """
        event = NextStateEvent(page= self)
        wx.PostEvent(self.parent, event)
    
    def define_page_structure(self):
        """
        Create empty sizer for a panel
        """
        self.vbox  = wx.BoxSizer(wx.VERTICAL)
        self.sizer0 = wx.BoxSizer(wx.VERTICAL)
        self.sizer1 = wx.BoxSizer(wx.VERTICAL)
        self.sizer2 = wx.BoxSizer(wx.VERTICAL)
        self.sizer3 = wx.BoxSizer(wx.VERTICAL)
        self.sizer4 = wx.BoxSizer(wx.VERTICAL)
        self.sizer5 = wx.BoxSizer(wx.VERTICAL)
        self.sizer6 = wx.BoxSizer(wx.VERTICAL)
        
        self.sizer0.SetMinSize((PANEL_WIDTH,-1))
        self.sizer1.SetMinSize((PANEL_WIDTH,-1))
        self.sizer2.SetMinSize((PANEL_WIDTH,-1))
        self.sizer3.SetMinSize((PANEL_WIDTH,-1))
        self.sizer4.SetMinSize((PANEL_WIDTH,-1))
        self.sizer5.SetMinSize((PANEL_WIDTH,-1))
        self.sizer6.SetMinSize((PANEL_WIDTH,-1))
        
        self.vbox.Add(self.sizer0)
        self.vbox.Add(self.sizer1)
        self.vbox.Add(self.sizer2)
        self.vbox.Add(self.sizer3)
        self.vbox.Add(self.sizer4)
        self.vbox.Add(self.sizer5)
        self.vbox.Add(self.sizer6)
        
    def set_layout(self):
        """
        layout
        """
        self.vbox.Layout()
        self.vbox.Fit(self) 
        self.SetSizer(self.vbox)
        self.Centre()
 
    def set_owner(self,owner):
        """ 
        set owner of fitpage
        
        :param owner: the class responsible of plotting
        
        """
        self.event_owner = owner    
        self.state.event_owner = owner
        
    def get_state(self):
        """
        """
        return self.state
    
    def get_data(self):
        """
        return the current data 
        """
        return self.data  
    
    def get_data_list(self):
        """
        return the current data 
        """
        return self.data_list  
    
    def set_manager(self, manager):
        """
        set panel manager
        
        :param manager: instance of plugin fitting
        
        """
        self._manager = manager  
        self.state.manager = manager
        
    def populate_box(self, dict):
        """
        Store list of model
        
        :param dict: dictionary containing list of models
        
        """
        self.model_list_box = dict
        self.state.model_list_box = self.model_list_box
        self.initialize_combox()
        
    def initialize_combox(self): 
        """
        put default value in the combobox 
        """  
        ## fill combox box
        if self.model_list_box is None:
            return
        if len(self.model_list_box) > 0:
            self._populate_box(self.formfactorbox,
                               self.model_list_box["Shapes"])
       
        if len(self.model_list_box) > 0:
            self._populate_box(self.structurebox,
                                self.model_list_box["Structure Factors"])
            self.structurebox.Insert("None", 0, None)
            self.structurebox.SetSelection(0)
            self.structurebox.Hide()
            self.text2.Hide()
            self.structurebox.Disable()
            self.text2.Disable()
             
            if self.model.__class__ in self.model_list_box["P(Q)*S(Q)"]:
                self.structurebox.Show()
                self.text2.Show()
                self.structurebox.Enable()
                self.text2.Enable()            
                
    def set_dispers_sizer(self):
        """
        fill sizer containing dispersity info
        """
        self.sizer4.Clear(True)
        name="Polydispersity and Orientational Distribution"
        box_description= wx.StaticBox(self, -1,name)
        boxsizer1 = wx.StaticBoxSizer(box_description, wx.VERTICAL)
        #----------------------------------------------------
        self.disable_disp = wx.RadioButton(self, -1, 'Off', (10, 10),
                                            style=wx.RB_GROUP)
        self.enable_disp = wx.RadioButton(self, -1, 'On', (10, 30))
        # best size for MAC and PC
        if ON_MAC:
            size_q = (30, 20)      
        else:
            size_q = (20, 15)    
        self.disp_help_bt = wx.Button(self,wx.NewId(),'?', 
                                      style = wx.BU_EXACTFIT,
                                      size=size_q)
        self.disp_help_bt.Bind(wx.EVT_BUTTON, 
                        self.on_pd_help_clicked,id= self.disp_help_bt.GetId())
        self.disp_help_bt.SetToolTipString("Helps for Polydispersion.")       
        
        self.Bind(wx.EVT_RADIOBUTTON, self._set_dipers_Param,
                     id=self.disable_disp.GetId())
        self.Bind(wx.EVT_RADIOBUTTON, self._set_dipers_Param,
                   id=self.enable_disp.GetId())
        #MAC needs SetValue
        self.disable_disp.SetValue(True)
        sizer_dispersion = wx.BoxSizer(wx.HORIZONTAL)
        sizer_dispersion.Add((20,20))
        name=""#Polydispersity and \nOrientational Distribution "
        sizer_dispersion.Add(wx.StaticText(self,-1,name))
        sizer_dispersion.Add(self.enable_disp )
        sizer_dispersion.Add((20,20))
        sizer_dispersion.Add(self.disable_disp )
        sizer_dispersion.Add((25,20))
        sizer_dispersion.Add(self.disp_help_bt)
        
        ## fill a sizer for dispersion         
        boxsizer1.Add( sizer_dispersion,0,
                wx.TOP|wx.BOTTOM|wx.LEFT|wx.EXPAND|wx.ADJUST_MINSIZE,border=5)
        #boxsizer1.Add( (10,10) )
        #boxsizer1.Add( sizer_select_dispers )
        self.sizer4_4 = wx.GridBagSizer(6,5)

        boxsizer1.Add( self.sizer4_4  )
        #-----------------------------------------------------
        self.sizer4.Add(boxsizer1,0, wx.EXPAND | wx.ALL, 10)
        self.sizer4_4.Layout()
        self.sizer4.Layout()
        self.Layout()
     
        self.Refresh()
        ## saving the state of enable dispersity button
        self.state.enable_disp= self.enable_disp.GetValue()
        self.state.disable_disp= self.disable_disp.GetValue()
        self.SetupScrolling()

    
    def onResetModel(self, event):
        """
        Reset model state
        """
        menu = event.GetEventObject()
        ## post help message for the selected model 
        msg = menu.GetHelpString(event.GetId())
        msg +=" reloaded"
        wx.PostEvent(self.parent.parent, StatusEvent(status=msg))
        
        name = menu.GetLabel(event.GetId())
        self._on_select_model_helper()
        if name in self.saved_states.keys():
            previous_state = self.saved_states[name]
            ## reset state of checkbox,textcrtl  and  regular parameters value
            self.Show(False)
            self.reset_page(previous_state)   
            self.Show(True)
               
    def on_preview(self, event):
        """
        Report the current fit results
        """   
        # Get plot image from plotpanel
        images, canvases = self.get_images()
        # get the report dialog
        self.state.report(images, canvases)
        
         
    def on_save(self, event):   
        """
        Save the current state into file
        """  
        self.save_current_state()
        new_state = self.state.clone()
        # Ask the user the location of the file to write to.
        path = None
        if self.parent !=  None:
            self._default_save_location = \
                        self.parent.parent._default_save_location
        dlg = wx.FileDialog(self, "Choose a file", self._default_save_location,
                                        self.window_caption, "*.fitv", wx.SAVE)

        if dlg.ShowModal() == wx.ID_OK:
            path = dlg.GetPath()
            self._default_save_location = os.path.dirname(path)
            self.parent.parent._default_save_location =\
                                 self._default_save_location
        else:
            return None
        # MAC always needs the extension for saving
        extens = ".fitv"
        # Make sure the ext included in the file name
        fName = os.path.splitext(path)[0] + extens
        #the manager write the state into file
        self._manager.save_fit_state(filepath=fName, fitstate=new_state)
        return new_state  
    
    def on_copy(self, event):
        """
        Copy Parameter values to the clipboad
        """
        if event != None:
            event.Skip()
        # It seems MAC needs wxCallAfter
        wx.CallAfter(self.get_copy)
        
        # messages depending on the flag
        #self._copy_info(None)
        
    def on_paste(self, event):
        """
        Paste Parameter values to the panel if possible
        """
        if event != None:
            event.Skip()
        # It seems MAC needs wxCallAfter for the setvalues 
        # for multiple textctrl items, otherwise it tends to crash once a while.
        wx.CallAfter(self.get_paste)
        # messages depending on the flag
        #self._copy_info(True)
        
    def _copy_info(self, flag):
        """
        Send event dpemding on flag
        
        : Param flag: flag that distinguish event
        """
        # messages depending on the flag
        if flag == None:
            msg = " Parameter values are copied to the clipboard..."
            infor = 'warning'
        elif flag:
            msg = " Parameter values are pasted from the clipboad..."
            infor = "warning"
        else:
            msg = "Error was occured "
            msg += ": No valid parameter values to paste from the clipboard..."
            infor = "error"
        # inform msg to wx
        wx.PostEvent( self.parent.parent, 
                      StatusEvent(status= msg, info=infor))
        
    def _get_time_stamp(self):
        """
        return time and date stings
        """
        # date and time 
        year, month, day,hour,minute,second,tda,ty,tm_isdst= time.localtime()
        current_time= str(hour)+":"+str(minute)+":"+str(second)
        current_date= str( month)+"/"+str(day)+"/"+str(year)
        return current_time, current_date
      
    def on_bookmark(self, event):
        """
        save history of the data and model
        """
        if self.model==None:
            msg="Can not bookmark; Please select Data and Model first..."
            wx.MessageBox(msg, 'Info')
            return 
        self.save_current_state()
        new_state = self.state.clone()
        ##Add model state on context menu
        self.number_saved_state += 1
        current_time, current_date = self._get_time_stamp()
        #name= self.model.name+"[%g]"%self.number_saved_state 
        name = "Fitting: %g]" % self.number_saved_state 
        name += self.model.__class__.__name__ 
        name += "bookmarked at %s on %s" % (current_time, current_date)
        self.saved_states[name]= new_state
        
        ## Add item in the context menu
        msg =  "Model saved at %s on %s"%(current_time, current_date)
         ## post help message for the selected model 
        msg +=" Saved! right click on this page to retrieve this model"
        wx.PostEvent(self.parent.parent, StatusEvent(status = msg ))
        
        id = wx.NewId()
        self.popUpMenu.Append(id,name,str(msg))
        wx.EVT_MENU(self, id, self.onResetModel)
        wx.PostEvent(self.parent.parent, 
                     AppendBookmarkEvent(title=name, 
                                         hint=str(msg), handler=self._back_to_bookmark))
    def _back_to_bookmark(self, event): 
        """
        Back to bookmark
        """
        self._manager.on_perspective(event)
        self.onResetModel(event)
    def old_on_bookmark(self, event):
        """
        save history of the data and model
        """
        if self.model==None:
            msg="Can not bookmark; Please select Data and Model first..."
            wx.MessageBox(msg, 'Info')
            return 
        if hasattr(self,"enable_disp"):
            self.state.enable_disp = copy.deepcopy(self.enable_disp.GetValue())
        if hasattr(self, "disp_box"):
            self.state.disp_box = copy.deepcopy(self.disp_box.GetSelection())

        self.state.model.name= self.model.name
        
        #Remember fit engine_type for fit panel
        if self.engine_type == None: 
            self.engine_type = "scipy"
        if self._manager !=None:
            self._manager._on_change_engine(engine=self.engine_type)
        
            self.state.engine_type = self.engine_type

        new_state = self.state.clone()
        new_state.model.name = self.state.model.name
        
        new_state.enable2D = copy.deepcopy(self.enable2D)
        ##Add model state on context menu
        self.number_saved_state += 1
        #name= self.model.name+"[%g]"%self.number_saved_state 
        name= self.model.__class__.__name__+"[%g]"%self.number_saved_state 
        self.saved_states[name]= new_state
        
        ## Add item in the context menu
        
        year, month, day,hour,minute,second,tda,ty,tm_isdst= time.localtime()
        my_time= str(hour)+" : "+str(minute)+" : "+str(second)+" "
        date= str( month)+"|"+str(day)+"|"+str(year)
        msg=  "Model saved at %s on %s"%(my_time, date)
         ## post help message for the selected model 
        msg +=" Saved! right click on this page to retrieve this model"
        wx.PostEvent(self.parent.parent, StatusEvent(status = msg ))
        
        id = wx.NewId()
        self.popUpMenu.Append(id,name,str(msg))
        wx.EVT_MENU(self, id, self.onResetModel)
        
    def onSetFocus(self, evt):
        """
        highlight the current textcrtl and hide the error text control shown 
        after fitting
        """
        return
    
    def read_file(self, path):
        """
        Read two columns file
        
        :param path: the path to the file to read
        
        """
        try:
            if path==None:
                wx.PostEvent(self.parent.parent, StatusEvent(status=\
                            " Selected Distribution was not loaded: %s"%path))
                return None, None
            input_f = open(path, 'r')
            buff = input_f.read()
            lines = buff.split('\n')
            
            angles = []
            weights=[]
            for line in lines:
                toks = line.split()
                try:
                    angle = float(toks[0])
                    weight = float(toks[1])
                except:
                    # Skip non-data lines
                    pass
                angles.append(angle)
                weights.append(weight)
            return numpy.array(angles), numpy.array(weights)
        except:
            raise 

    def createMemento(self):
        """
        return the current state of the page
        """
        return self.state.clone()
    
    
    def save_current_state(self):
        """
        Store current state
        """
        self.state.engine_type = copy.deepcopy(self.engine_type)
        ## save model option
        if self.model!= None:
            self.disp_list= self.model.getDispParamList()
            self.state.disp_list= copy.deepcopy(self.disp_list)
            self.state.model = self.model.clone()
        #save radiobutton state for model selection
        self.state.shape_rbutton = self.shape_rbutton.GetValue()
        self.state.shape_indep_rbutton = self.shape_indep_rbutton.GetValue()
        self.state.struct_rbutton = self.struct_rbutton.GetValue()
        self.state.plugin_rbutton = self.plugin_rbutton.GetValue()
        #model combobox
        self.state.structurebox = self.structurebox.GetSelection()
        self.state.formfactorbox = self.formfactorbox.GetSelection()
        
        self.state.enable2D = copy.deepcopy(self.enable2D)
        self.state.values= copy.deepcopy(self.values)
        self.state.weights = copy.deepcopy( self.weights)
        ## save data    
        self.state.data= copy.deepcopy(self.data)
        self.state.qmax_x = self.qmax_x
        self.state.qmin_x = self.qmin_x
        self.state.dI_noweight = copy.deepcopy(self.dI_noweight.GetValue())
        self.state.dI_didata = copy.deepcopy(self.dI_didata.GetValue())
        self.state.dI_sqrdata = copy.deepcopy(self.dI_sqrdata.GetValue())
        self.state.dI_idata = copy.deepcopy(self.dI_idata.GetValue())
        if hasattr(self,"enable_disp"):
            self.state.enable_disp= self.enable_disp.GetValue()
            self.state.disable_disp = self.disable_disp.GetValue()
            
        self.state.smearer = copy.deepcopy(self.current_smearer)
        if hasattr(self,"enable_smearer"):
            self.state.enable_smearer = \
                                copy.deepcopy(self.enable_smearer.GetValue())
            self.state.disable_smearer = \
                                copy.deepcopy(self.disable_smearer.GetValue())

        self.state.pinhole_smearer = \
                                copy.deepcopy(self.pinhole_smearer.GetValue())
        self.state.slit_smearer = copy.deepcopy(self.slit_smearer.GetValue())  
                  
        if len(self._disp_obj_dict)>0:
            for k , v in self._disp_obj_dict.iteritems():
                self.state._disp_obj_dict[k]= v
                        
            
            self.state.values = copy.deepcopy(self.values)
            self.state.weights = copy.deepcopy(self.weights)
        ## save plotting range
        self._save_plotting_range()
        
        self.state.orientation_params = []
        self.state.orientation_params_disp = []
        self.state.parameters = []
        self.state.fittable_param = []
        self.state.fixed_param = []
        self.state.str_parameters = []

        
        ## save checkbutton state and txtcrtl values
        self._copy_parameters_state(self.str_parameters, 
                                    self.state.str_parameters)
        self._copy_parameters_state(self.orientation_params,
                                     self.state.orientation_params)
        self._copy_parameters_state(self.orientation_params_disp,
                                     self.state.orientation_params_disp)
        
        self._copy_parameters_state(self.parameters, self.state.parameters)
        self._copy_parameters_state(self.fittable_param,
                                     self.state.fittable_param)
        self._copy_parameters_state(self.fixed_param, self.state.fixed_param)
        #save chisqr
        self.state.tcChi = self.tcChi.GetValue()
        
    def save_current_state_fit(self):
        """
        Store current state for fit_page
        """
        ## save model option
        if self.model!= None:
            self.disp_list= self.model.getDispParamList()
            self.state.disp_list= copy.deepcopy(self.disp_list)
            self.state.model = self.model.clone()
        if hasattr(self, "engine_type"):
            self.state.engine_type = copy.deepcopy(self.engine_type)
            
        self.state.enable2D = copy.deepcopy(self.enable2D)
        self.state.values= copy.deepcopy(self.values)
        self.state.weights = copy.deepcopy( self.weights)
        ## save data    
        self.state.data= copy.deepcopy(self.data)
        
        if hasattr(self,"enable_disp"):
            self.state.enable_disp= self.enable_disp.GetValue()
            self.state.disable_disp = self.disable_disp.GetValue()
            
        self.state.smearer = copy.deepcopy(self.current_smearer)
        if hasattr(self,"enable_smearer"):
            self.state.enable_smearer = \
                                copy.deepcopy(self.enable_smearer.GetValue())
            self.state.disable_smearer = \
                                copy.deepcopy(self.disable_smearer.GetValue())
            
        self.state.pinhole_smearer = \
                                copy.deepcopy(self.pinhole_smearer.GetValue())
        self.state.slit_smearer = copy.deepcopy(self.slit_smearer.GetValue())  
        self.state.dI_noweight = copy.deepcopy(self.dI_noweight.GetValue())
        self.state.dI_didata = copy.deepcopy(self.dI_didata.GetValue())
        self.state.dI_sqrdata = copy.deepcopy(self.dI_sqrdata.GetValue())
        self.state.dI_idata = copy.deepcopy(self.dI_idata.GetValue())  
        if hasattr(self,"disp_box"):
            self.state.disp_box = self.disp_box.GetCurrentSelection()

            if len(self.disp_cb_dict) > 0:
                for k, v in self.disp_cb_dict.iteritems():
         
                    if v == None :
                        self.state.disp_cb_dict[k] = v
                    else:
                        try:
                            self.state.disp_cb_dict[k] = v.GetValue()
                        except:
                            self.state.disp_cb_dict[k] = None
           
            if len(self._disp_obj_dict) > 0:
                for k , v in self._disp_obj_dict.iteritems():
      
                    self.state._disp_obj_dict[k] = v
                        
            
            self.state.values = copy.deepcopy(self.values)
            self.state.weights = copy.deepcopy(self.weights)
           
        ## save plotting range
        self._save_plotting_range()
        
        ## save checkbutton state and txtcrtl values
        self._copy_parameters_state(self.orientation_params,
                                     self.state.orientation_params)
        self._copy_parameters_state(self.orientation_params_disp,
                                     self.state.orientation_params_disp)
        self._copy_parameters_state(self.parameters, self.state.parameters)
        self._copy_parameters_state(self.fittable_param,
                                             self.state.fittable_param)
        self._copy_parameters_state(self.fixed_param, self.state.fixed_param)
    
          
    def check_invalid_panel(self):  
        """
        check if the user can already perform some action with this panel
        """ 
        flag = False
        if self.data is None:
            self.disable_smearer.SetValue(True)
            self.disable_disp.SetValue(True)
            msg = "Please load Data and select Model to start..."
            wx.MessageBox(msg, 'Info')
            return  True
        
    def set_model_state(self, state):
        """
        reset page given a model state
        """
        self.disp_cb_dict = state.disp_cb_dict
        self.disp_list = state.disp_list
      
        ## set the state of the radio box
        self.shape_rbutton.SetValue(state.shape_rbutton )
        self.shape_indep_rbutton.SetValue(state.shape_indep_rbutton)
        self.struct_rbutton.SetValue(state.struct_rbutton)
        self.plugin_rbutton.SetValue(state.plugin_rbutton)
        
        ## fill model combobox
        self._show_combox_helper()
        #select the current model
        self.formfactorbox.Select(int(state.formfactorcombobox))
        self.structurebox.SetSelection(state.structurecombobox )
        if state.multi_factor != None:
            self.multifactorbox.SetSelection(state.multi_factor)
            
         ## reset state of checkbox,textcrtl  and  regular parameters value
        self._reset_parameters_state(self.orientation_params_disp,
                                     state.orientation_params_disp)
        self._reset_parameters_state(self.orientation_params,
                                     state.orientation_params)
        self._reset_parameters_state(self.str_parameters,
                                     state.str_parameters)
        self._reset_parameters_state(self.parameters,state.parameters)
         ## display dispersion info layer        
        self.enable_disp.SetValue(state.enable_disp)
        self.disable_disp.SetValue(state.disable_disp)
        
        if hasattr(self, "disp_box"):
            
            self.disp_box.SetSelection(state.disp_box) 
            n= self.disp_box.GetCurrentSelection()
            dispersity= self.disp_box.GetClientData(n)
            name = dispersity.__name__     

            self._set_dipers_Param(event=None)
       
            if name == "ArrayDispersion":
                
                for item in self.disp_cb_dict.keys():
                    
                    if hasattr(self.disp_cb_dict[item], "SetValue") :
                        self.disp_cb_dict[item].SetValue(\
                                                    state.disp_cb_dict[item])
                        # Create the dispersion objects
                        from sans.models.dispersion_models import ArrayDispersion
                        disp_model = ArrayDispersion()
                        if hasattr(state,"values")and\
                                 self.disp_cb_dict[item].GetValue() == True:
                            if len(state.values)>0:
                                self.values=state.values
                                self.weights=state.weights
                                disp_model.set_weights(self.values,
                                                        state.weights)
                            else:
                                self._reset_dispersity()
                        
                        self._disp_obj_dict[item] = disp_model
                        # Set the new model as the dispersion object 
                        #for the selected parameter
                        self.model.set_dispersion(item, disp_model)
                    
                        self.model._persistency_dict[item] = \
                                                [state.values, state.weights]
                    
            else:
                keys = self.model.getParamList()
                for item in keys:
                    if item in self.disp_list and \
                        not self.model.details.has_key(item):
                        self.model.details[item] = ["", None, None]
                for k,v in self.state.disp_cb_dict.iteritems():
                    self.disp_cb_dict = copy.deepcopy(state.disp_cb_dict) 
                    self.state.disp_cb_dict = copy.deepcopy(state.disp_cb_dict)
         ## smearing info  restore
        if hasattr(self, "enable_smearer"):
            ## set smearing value whether or not the data 
            #contain the smearing info
            self.enable_smearer.SetValue(state.enable_smearer)
            self.disable_smearer.SetValue(state.disable_smearer)
            self.onSmear(event=None)           
        self.pinhole_smearer.SetValue(state.pinhole_smearer)
        self.slit_smearer.SetValue(state.slit_smearer)
        
        self.dI_noweight.SetValue(state.dI_noweight)
        self.dI_didata.SetValue(state.dI_didata)
        self.dI_sqrdata.SetValue(state.dI_sqrdata)
        self.dI_idata.SetValue(state.dI_idata)
        
        ## we have two more options for smearing
        if self.pinhole_smearer.GetValue(): self.onPinholeSmear(event=None)
        elif self.slit_smearer.GetValue(): self.onSlitSmear(event=None)
       
        ## reset state of checkbox,textcrtl  and dispersity parameters value
        self._reset_parameters_state(self.fittable_param,state.fittable_param)
        self._reset_parameters_state(self.fixed_param,state.fixed_param)
        
        ## draw the model with previous parameters value
        self._onparamEnter_helper()
        self.select_param(event=None) 
        #Save state_fit
        self.save_current_state_fit()
        self._lay_out()
        self.Refresh()
        
    def reset_page_helper(self, state):
        """
        Use page_state and change the state of existing page
        
        :precondition: the page is already drawn or created
        
        :postcondition: the state of the underlying data change as well as the
            state of the graphic interface
        """
        if state == None:
            #self._undo.Enable(False)
            return 
        # set data, etc. from the state
        # reset page between theory and fitting from bookmarking
        #if state.data == None:
        #    data = None
        #else:
        data = state.data

        #if data != None:
        
        if data == None:
            data_min = state.qmin
            data_max = state.qmax
            self.qmin_x = data_min
            self.qmax_x = data_max
            #self.minimum_q.SetValue(str(data_min))
            #self.maximum_q.SetValue(str(data_max))
            self.qmin.SetValue(str(data_min))
            self.qmax.SetValue(str(data_max))

            self.state.data = data
            self.state.qmin = self.qmin_x
            self.state.qmax = self.qmax_x
        else:
            self.set_data(data)
            
        self.enable2D= state.enable2D
        self.engine_type = state.engine_type

        self.disp_cb_dict = state.disp_cb_dict
        self.disp_list = state.disp_list
      
        ## set the state of the radio box
        self.shape_rbutton.SetValue(state.shape_rbutton )
        self.shape_indep_rbutton.SetValue(state.shape_indep_rbutton)
        self.struct_rbutton.SetValue(state.struct_rbutton)
        self.plugin_rbutton.SetValue(state.plugin_rbutton)
        
        ## fill model combobox
        self._show_combox_helper()
        #select the current model
        self.formfactorbox.Select(int(state.formfactorcombobox))
        self.structurebox.SetSelection(state.structurecombobox )
        if state.multi_factor != None:
            self.multifactorbox.SetSelection(state.multi_factor)

        #reset the fitting engine type
        self.engine_type = state.engine_type
        #draw the pnael according to the new model parameter 
        self._on_select_model(event=None)
        # take care of 2D button
        if data == None and self.model_view.IsEnabled():
            if self.enable2D:
                self.model_view.SetLabel("2D Mode")
            else:
                self.model_view.SetLabel("1D Mode")
        # else:
                
        if self._manager !=None:
            self._manager._on_change_engine(engine=self.engine_type)
        ## set the select all check box to the a given state
        self.cb1.SetValue(state.cb1)
     
        ## reset state of checkbox,textcrtl  and  regular parameters value
        self._reset_parameters_state(self.orientation_params_disp,
                                     state.orientation_params_disp)
        self._reset_parameters_state(self.orientation_params,
                                     state.orientation_params)
        self._reset_parameters_state(self.str_parameters,
                                     state.str_parameters)
        self._reset_parameters_state(self.parameters,state.parameters)    
         ## display dispersion info layer        
        self.enable_disp.SetValue(state.enable_disp)
        self.disable_disp.SetValue(state.disable_disp)
        # If the polydispersion is ON
        if state.enable_disp:
            # reset dispersion according the state
            self._set_dipers_Param(event=None)
            self._reset_page_disp_helper(state)
        ##plotting range restore    
        self._reset_plotting_range(state)
        ## smearing info  restore
        if hasattr(self, "enable_smearer"):
            ## set smearing value whether or not the data 
            #contain the smearing info
            self.enable_smearer.SetValue(state.enable_smearer)
            self.disable_smearer.SetValue(state.disable_smearer)
            self.onSmear(event=None)           
        self.pinhole_smearer.SetValue(state.pinhole_smearer)
        self.slit_smearer.SetValue(state.slit_smearer)
        
        self.dI_noweight.SetValue(state.dI_noweight)
        self.dI_didata.SetValue(state.dI_didata)
        self.dI_sqrdata.SetValue(state.dI_sqrdata)
        self.dI_idata.SetValue(state.dI_idata)
        
        
        ## we have two more options for smearing
        if self.pinhole_smearer.GetValue(): self.onPinholeSmear(event=None)
        elif self.slit_smearer.GetValue(): self.onSlitSmear(event=None)
        
        ## reset state of checkbox,textcrtl  and dispersity parameters value
        self._reset_parameters_state(self.fittable_param,state.fittable_param)
        self._reset_parameters_state(self.fixed_param,state.fixed_param)
        
        ## draw the model with previous parameters value
        self._onparamEnter_helper()
        #reset the value of chisqr when not consistent with the value computed
        self.tcChi.SetValue(str(self.state.tcChi))
        ## reset context menu items
        self._reset_context_menu()
        
        ## set the value of the current state to the state given as parameter
        self.state = state.clone() 
    
    def _reset_page_disp_helper(self, state):
        """
        Help to rest page for dispersions
        """
        keys = self.model.getParamList()
        for item in keys:
            if item in self.disp_list and \
                not self.model.details.has_key(item):
                self.model.details[item] = ["", None, None]
        #for k,v in self.state.disp_cb_dict.iteritems():
        self.disp_cb_dict = copy.deepcopy(state.disp_cb_dict) 
        self.state.disp_cb_dict = copy.deepcopy(state.disp_cb_dict)
        self.values = copy.deepcopy(state.values)
        self.weights = copy.deepcopy(state.weights)
        
        for key, disp in state._disp_obj_dict.iteritems():
            # From saved file, disp_model can not be sent in model obj.
            # it will be sent as a string here, then converted to model object.
            if disp.__class__.__name__ == 'str':
                com_str  = "from sans.models.dispersion_models "
                com_str += "import %s as disp_func"
                exec com_str % disp
                disp_model = disp_func()
            else:
                disp_model = disp

            self._disp_obj_dict[key] = disp_model 
            param_name = key.split('.')[0]
            # Try to set dispersion only when available
            # for eg., pass the orient. angles for 1D Cal 
            try:
                self.model.set_dispersion(param_name, disp_model)
                self.model._persistency_dict[key] = \
                                 [state.values, state.weights]
            except:
                pass
            selection = self._find_polyfunc_selection(disp_model)
            for list in self.fittable_param:
                if list[1] == key and list[7] != None:
                    list[7].SetSelection(selection)
                    # For the array disp_model, set the values and weights 
                    if selection == 1:
                        disp_model.set_weights(self.values[key], 
                                              self.weights[key])
                        try:
                            # Diables all fittable params for array
                            list[0].SetValue(False)
                            list[0].Disable()
                            list[2].Disable()
                            list[5].Disable()
                            list[6].Disable()
                        except:
                            pass
            # For array, disable all fixed params
            if selection == 1:
                for item in self.fixed_param:
                    if item[1].split(".")[0] == key.split(".")[0]:
                        # try it and pass it for the orientation for 1D
                        try:
                            item[2].Disable()
                        except:
                            pass
    
        # Make sure the check box updated when all checked
        if self.cb1.GetValue():
            self.select_all_param(None)        
      
    def _selectDlg(self):
        """
        open a dialog file to selected the customized dispersity 
        """
        import os
        if self.parent !=  None:
            self._default_save_location = \
                        self.parent.parent._default_save_location
        dlg = wx.FileDialog(self, "Choose a weight file",
                                self._default_save_location , "", 
                                "*.*", wx.OPEN)
        path = None
        if dlg.ShowModal() == wx.ID_OK:
            path = dlg.GetPath()
        dlg.Destroy()
        return path

    def _reset_context_menu(self):
        """
        reset the context menu
        """
        for name, state in self.state.saved_states.iteritems():
            self.number_saved_state += 1
            ## Add item in the context menu
            id = wx.NewId()
            msg = 'Save model and state %g' % self.number_saved_state
            self.popUpMenu.Append(id, name, msg)
            wx.EVT_MENU(self, id, self.onResetModel)
    
    def _reset_plotting_range(self, state):
        """
        Reset the plotting range to a given state
        """
        # if self.check_invalid_panel():
        #    return
        self.qmin.SetValue(str(state.qmin))
        self.qmax.SetValue(str(state.qmax)) 

    def _save_typeOfmodel(self):
        """
        save radiobutton containing the type model that can be selected
        """
        self.state.shape_rbutton = self.shape_rbutton.GetValue()
        self.state.shape_indep_rbutton = self.shape_indep_rbutton.GetValue()
        self.state.struct_rbutton = self.struct_rbutton.GetValue()
        self.state.plugin_rbutton = self.plugin_rbutton.GetValue()
        self.state.structurebox= self.structurebox.GetCurrentSelection()
        self.state.formfactorbox = self.formfactorbox.GetCurrentSelection()
       
        #self._undo.Enable(True)
        ## post state to fit panel
        event = PageInfoEvent(page = self)
        wx.PostEvent(self.parent, event)
        
    def _save_plotting_range(self ):
        """
        save the state of plotting range 
        """
        self.state.qmin = self.qmin_x
        self.state.qmax = self.qmax_x 
        self.state.npts = self.npts_x
            
    def _onparamEnter_helper(self):
        """
        check if values entered by the user are changed and valid to replot 
        model
        """
        # Flag to register when a parameter has changed.   
        is_modified = False
        self.fitrange = True
        is_2Ddata = False
        #self._undo.Enable(True)
        # check if 2d data
        if self.data.__class__.__name__ == "Data2D":
            is_2Ddata = True
        if self.model !=None:
            try:
                is_modified = self._check_value_enter(self.fittable_param,
                                                     is_modified)
                is_modified = self._check_value_enter(self.fixed_param,
                                                      is_modified)
                is_modified = self._check_value_enter(self.parameters,
                                                      is_modified) 
            except:
                pass
            #if is_modified:

            # Here we should check whether the boundaries have been modified.
            # If qmin and qmax have been modified, update qmin and qmax and 
            # set the is_modified flag to True
            if self._validate_qrange(self.qmin, self.qmax):
                tempmin = float(self.qmin.GetValue())
                if tempmin != self.qmin_x:
                    self.qmin_x = tempmin
                    is_modified = True
                tempmax = float(self.qmax.GetValue())
                if tempmax != self.qmax_x:
                    self.qmax_x = tempmax
                    is_modified = True
            
                if is_2Ddata:
                    # set mask   
                    is_modified = self._validate_Npts()
                    
            else:
                self.fitrange = False    
            
            ## if any value is modify draw model with new value
            if not self.fitrange:
                #self.btFit.Disable()
                if is_2Ddata: self.btEditMask.Disable()
            else:
                #self.btFit.Enable(True)
                if is_2Ddata: self.btEditMask.Enable(True)
            if is_modified and self.fitrange:
                #if self.data == None:
                # Theory case: need to get npts value to draw
                self.npts_x = float(self.Npts_total.GetValue())
                self.create_default_data()
                self.state_change= True
                self._draw_model() 
                self.Refresh()
        return is_modified
    
    def _update_paramv_on_fit(self):
        """
        make sure that update param values just before the fitting
        """
        #flag for qmin qmax check values
        flag = True
        self.fitrange = True
        is_modified = False

        #wx.PostEvent(self._manager.parent, StatusEvent(status=" \
        #updating ... ",type="update"))

        ##So make sure that update param values on_Fit.
        #self._undo.Enable(True)
        if self.model !=None:           
            ##Check the values
            self._check_value_enter( self.fittable_param ,is_modified)
            self._check_value_enter( self.fixed_param ,is_modified)
            self._check_value_enter( self.parameters ,is_modified)

            # If qmin and qmax have been modified, update qmin and qmax and 
             # Here we should check whether the boundaries have been modified.
            # If qmin and qmax have been modified, update qmin and qmax and 
            # set the is_modified flag to True
            self.fitrange = self._validate_qrange(self.qmin, self.qmax)
            if self.fitrange:
                tempmin = float(self.qmin.GetValue())
                if tempmin != self.qmin_x:
                    self.qmin_x = tempmin
                tempmax = float(self.qmax.GetValue())
                if tempmax != self.qmax_x:
                    self.qmax_x = tempmax
                if tempmax == tempmin:
                    flag = False    
                temp_smearer = None
                if not self.disable_smearer.GetValue():
                    temp_smearer= self.current_smearer
                    if self.slit_smearer.GetValue():
                        flag = self.update_slit_smear()
                    elif self.pinhole_smearer.GetValue():
                        flag = self.update_pinhole_smear()
                    else:
                        self._manager.set_smearer(smearer=temp_smearer,
                                                  uid=self.uid,
                                                  fid=self.data.id,
                                                     qmin=float(self.qmin_x),
                                                      qmax=float(self.qmax_x),
                            enable_smearer=not self.disable_smearer.GetValue(),
                                                      draw=False)
                elif not self._is_2D():
                    self._manager.set_smearer(smearer=temp_smearer,
                                              qmin=float(self.qmin_x),
                                              uid=self.uid, 
                                              fid=self.data.id,
                                                 qmax= float(self.qmax_x),
                            enable_smearer=not self.disable_smearer.GetValue(),
                                                 draw=False)
                    if self.data != None:
                        index_data = ((self.qmin_x <= self.data.x)&\
                                      (self.data.x <= self.qmax_x))
                        val = str(len(self.data.x[index_data==True]))
                        self.Npts_fit.SetValue(val)
                    else:
                        # No data in the panel
                        try:
                            self.npts_x = float(self.Npts_total.GetValue())
                        except:
                            flag = False
                            return flag
                    flag = True
                if self._is_2D():
                    # only 2D case set mask  
                    flag = self._validate_Npts()
                    if not flag:
                        return flag
            else: flag = False
        else: 
            flag = False

        #For invalid q range, disable the mask editor and fit button, vs.    
        if not self.fitrange:
            #self.btFit.Disable()
            if self._is_2D():
                self.btEditMask.Disable()
        else:
            #self.btFit.Enable(True)
            if self._is_2D() and  self.data != None:
                self.btEditMask.Enable(True)

        if not flag:
            msg = "Cannot Plot or Fit :Must select a "
            msg += " model or Fitting range is not valid!!!  "
            wx.PostEvent(self.parent.parent, StatusEvent(status=msg))
        
        self.save_current_state()
   
        return flag                           
               
    def _is_modified(self, is_modified):
        """
        return to self._is_modified
        """
        return is_modified
                       
    def _reset_parameters_state(self, listtorestore, statelist):
        """
        Reset the parameters at the given state
        """
        if len(statelist) == 0 or len(listtorestore) == 0:
            return
        if len(statelist) !=  len(listtorestore):
            return

        for j in range(len(listtorestore)):
            item_page = listtorestore[j]
            item_page_info = statelist[j]
            ##change the state of the check box for simple parameters
            if item_page[0]!=None:   
                item_page[0].SetValue(item_page_info[0])
            if item_page[2]!=None:
                item_page[2].SetValue(item_page_info[2])
                if item_page[2].__class__.__name__ == "ComboBox":
                   if self.model.fun_list.has_key(item_page_info[2]):
                       fun_val = self.model.fun_list[item_page_info[2]]
                       self.model.setParam(item_page_info[1],fun_val)
            if item_page[3]!=None:
                ## show or hide text +/-
                if item_page_info[2]:
                    item_page[3].Show(True)
                else:
                    item_page[3].Hide()
            if item_page[4]!=None:
                ## show of hide the text crtl for fitting error
                if item_page_info[4][0]:
                    item_page[4].Show(True)
                    item_page[4].SetValue(item_page_info[4][1])
                else:
                    item_page[3].Hide()
            if item_page[5]!=None:
                ## show of hide the text crtl for fitting error
                item_page[5].Show(item_page_info[5][0])
                item_page[5].SetValue(item_page_info[5][1])
                
            if item_page[6]!=None:
                ## show of hide the text crtl for fitting error
                item_page[6].Show(item_page_info[6][0])
                item_page[6].SetValue(item_page_info[6][1])

                    
    def _reset_strparam_state(self, listtorestore, statelist):
        """
        Reset the string parameters at the given state
        """
        if len(statelist) == 0:
            return

        listtorestore = copy.deepcopy(statelist)
        
        for j in range(len(listtorestore)):
            item_page = listtorestore[j]
            item_page_info = statelist[j]
            ##change the state of the check box for simple parameters
            
            if item_page[0] != None:   
                item_page[0].SetValue(format_number(item_page_info[0], True))

            if item_page[2] != None:
                param_name = item_page_info[1]
                value = item_page_info[2]
                selection = value
                if self.model.fun_list.has_key(value):
                    selection = self.model.fun_list[value]
                item_page[2].SetValue(selection)
                self.model.setParam(param_name, selection)
                                      
    def _copy_parameters_state(self, listtocopy, statelist):
        """
        copy the state of button 
        
        :param listtocopy: the list of check button to copy
        :param statelist: list of state object to store the current state
        
        """
        if len(listtocopy)==0:
            return
       
        for item in listtocopy:
  
            checkbox_state = None
            if item[0]!= None:
                checkbox_state= item[0].GetValue()
            parameter_name = item[1]
            parameter_value = None
            if item[2]!=None:
                parameter_value = item[2].GetValue()
            static_text = None
            if item[3]!=None:
                static_text = item[3].IsShown()
            error_value = None
            error_state = None
            if item[4]!= None:
                error_value = item[4].GetValue()
                error_state = item[4].IsShown()
                
            min_value = None
            min_state = None
            if item[5]!= None:
                min_value = item[5].GetValue()
                min_state = item[5].IsShown()
                
            max_value = None
            max_state = None
            if item[6]!= None:
                max_value = item[6].GetValue()
                max_state = item[6].IsShown()
            unit=None
            if item[7]!=None:
                unit = item[7].GetLabel()
               
            statelist.append([checkbox_state, parameter_name, parameter_value,
                              static_text ,[error_state, error_value],
                                [min_state, min_value],
                                [max_state, max_value], unit])
           
    def _set_model_sizer_selection(self, model):
        """
        Display the sizer according to the type of the current model
        """
        if model == None:
            return
        if hasattr(model ,"s_model"):
            
            class_name = model.s_model.__class__
            name = model.s_model.name
            flag = (name != "NoStructure")
            if flag and \
                (class_name in self.model_list_box["Structure Factors"]):
                self.structurebox.Show()
                self.text2.Show()                
                self.structurebox.Enable()
                self.text2.Enable()
                items = self.structurebox.GetItems()
                self.sizer1.Layout()
                
                for i in range(len(items)):
                    if items[i]== str(name):
                        self.structurebox.SetSelection(i)
                        break
                    
        if hasattr(model ,"p_model"):
            class_name = model.p_model.__class__
            name = model.p_model.name
            self.formfactorbox.Clear()
            
            for k, list in self.model_list_box.iteritems():
                if k in["P(Q)*S(Q)","Shapes" ] and class_name in self.model_list_box["Shapes"]:
                    self.shape_rbutton.SetValue(True)
                    ## fill the form factor list with new model
                    self._populate_box(self.formfactorbox,self.model_list_box["Shapes"])
                    items = self.formfactorbox.GetItems()
                    ## set comboxbox to the selected item
                    for i in range(len(items)):
                        if items[i]== str(name):
                            self.formfactorbox.SetSelection(i)
                            break
                    return
                elif k == "Shape-Independent":
                    self.shape_indep_rbutton.SetValue(True)
                elif k == "Structure Factors":
                     self.struct_rbutton.SetValue(True)
                elif  k == "Multi-Functions":
                    continue
                else:
                    self.plugin_rbutton.SetValue(True)
               
                if class_name in list:
                    ## fill the form factor list with new model
                    self._populate_box(self.formfactorbox, list)
                    items = self.formfactorbox.GetItems()
                    ## set comboxbox to the selected item
                    for i in range(len(items)):
                        if items[i]== str(name):
                            self.formfactorbox.SetSelection(i)
                            break
                    break
        else:

            ## Select the model from the menu
            class_name = model.__class__
            name = model.name
            self.formfactorbox.Clear()
            items = self.formfactorbox.GetItems()
    
            for k, list in self.model_list_box.iteritems():          
                if k in["P(Q)*S(Q)","Shapes" ] and class_name in self.model_list_box["Shapes"]:
                    if class_name in self.model_list_box["P(Q)*S(Q)"]:
                        self.structurebox.Show()
                        self.text2.Show()
                        self.structurebox.Enable()
                        self.structurebox.SetSelection(0)
                        self.text2.Enable()
                    else:
                        self.structurebox.Hide()
                        self.text2.Hide()
                        self.structurebox.Disable()
                        self.structurebox.SetSelection(0)
                        self.text2.Disable()
                        
                    self.shape_rbutton.SetValue(True)
                    ## fill the form factor list with new model
                    self._populate_box(self.formfactorbox,self.model_list_box["Shapes"])
                    items = self.formfactorbox.GetItems()
                    ## set comboxbox to the selected item
                    for i in range(len(items)):
                        if items[i]== str(name):
                            self.formfactorbox.SetSelection(i)
                            break
                    return
                elif k == "Shape-Independent":
                    self.shape_indep_rbutton.SetValue(True)
                elif k == "Structure Factors":
                    self.struct_rbutton.SetValue(True)
                elif  k == "Multi-Functions":
                    continue
                else:
                    self.plugin_rbutton.SetValue(True)
                if class_name in list:
                    self.structurebox.SetSelection(0)
                    self.structurebox.Disable()
                    self.text2.Disable()                    
                    ## fill the form factor list with new model
                    self._populate_box(self.formfactorbox, list)
                    items = self.formfactorbox.GetItems()
                    ## set comboxbox to the selected item
                    for i in range(len(items)):
                        if items[i]== str(name):
                            self.formfactorbox.SetSelection(i)
                            break
                    break
    
    def _draw_model(self, update_chisqr=True):
        """
        Method to draw or refresh a plotted model.
        The method will use the data member from the model page
        to build a call to the fitting perspective manager.
        
        :param chisqr: update chisqr value [bool]
        """
        #if self.check_invalid_panel():
        #    return
        if self.model !=None:
            temp_smear=None
            if hasattr(self, "enable_smearer"):
                if not self.disable_smearer.GetValue():
                    temp_smear= self.current_smearer
            # compute weight for the current data
            from .utils import get_weight
            flag = self.get_weight_flag()
            weight = get_weight(data=self.data, is2d=self._is_2D(), flag=flag)
            toggle_mode_on = self.model_view.IsEnabled()
            self._manager.draw_model(self.model, 
                                    data=self.data,
                                    smearer= temp_smear,
                                    qmin=float(self.qmin_x), 
                                    qmax=float(self.qmax_x),
                                    page_id=self.uid,
                                    toggle_mode_on=toggle_mode_on, 
                                    state = self.state,
                                    enable2D=self.enable2D,
                                    update_chisqr=update_chisqr,
                                    weight=weight)
        
       
    def _on_show_sld(self, event=None):
        """
        Plot SLD profile
        """
        # get profile data
        x,y=self.model.getProfile()

        from danse.common.plottools import Data1D
        #from sans.perspectives.theory.profile_dialog import SLDPanel
        from sans.guiframe.local_perspectives.plotting.profile_dialog \
        import SLDPanel
        sld_data = Data1D(x,y)
        sld_data.name = 'SLD'
        sld_data.axes = self.sld_axes
        self.panel = SLDPanel(self, data=sld_data, axes =self.sld_axes,id =-1)
        self.panel.ShowModal()    
        
    def _set_multfactor_combobox(self, multiplicity=10):   
        """
        Set comboBox for muitfactor of CoreMultiShellModel
        :param multiplicit: no. of multi-functionality
        """
        # build content of the combobox
        for idx in range(0,multiplicity):
            self.multifactorbox.Append(str(idx),int(idx))
            #self.multifactorbox.SetSelection(1) 
        self._hide_multfactor_combobox()
        
    def _show_multfactor_combobox(self):   
        """
        Show the comboBox of muitfactor of CoreMultiShellModel
        """ 
        if not self.mutifactor_text.IsShown():
            self.mutifactor_text.Show(True)
            self.mutifactor_text1.Show(True)
        if not self.multifactorbox.IsShown():
            self.multifactorbox.Show(True)  
             
    def _hide_multfactor_combobox(self):   
        """
        Hide the comboBox of muitfactor of CoreMultiShellModel
        """ 
        if self.mutifactor_text.IsShown():
            self.mutifactor_text.Hide()
            self.mutifactor_text1.Hide()
        if self.multifactorbox.IsShown():
            self.multifactorbox.Hide()   

        
    def _show_combox_helper(self):
        """
        Fill panel's combo box according to the type of model selected
        """
        if self.shape_rbutton.GetValue():
            ##fill the combobox with form factor list
            self.structurebox.SetSelection(0)
            self.structurebox.Disable()
            self.formfactorbox.Clear()
            self._populate_box( self.formfactorbox,self.model_list_box["Shapes"])
        if self.shape_indep_rbutton.GetValue():
            ##fill the combobox with shape independent  factor list
            self.structurebox.SetSelection(0)
            self.structurebox.Disable()
            self.formfactorbox.Clear()
            self._populate_box( self.formfactorbox,
                                self.model_list_box["Shape-Independent"])
        if self.struct_rbutton.GetValue():
            ##fill the combobox with structure factor list
            self.structurebox.SetSelection(0)
            self.structurebox.Disable()
            self.formfactorbox.Clear()
            self._populate_box( self.formfactorbox,
                                self.model_list_box["Structure Factors"])
        if self.plugin_rbutton.GetValue():
            ##fill the combobox with form factor list
            self.structurebox.Disable()
            self.formfactorbox.Clear()
            self._populate_box( self.formfactorbox,
                                self.model_list_box["Customized Models"])
        
    def _show_combox(self, event=None):
        """
        Show combox box associate with type of model selected
        """
        #if self.check_invalid_panel():
        #    self.shape_rbutton.SetValue(True)
        #    return

        self._show_combox_helper()
        self._on_select_model(event=None)
        self._save_typeOfmodel()
        self.sizer4_4.Layout()
        self.sizer4.Layout()
        self.Layout()
        self.Refresh()
  
    def _populate_box(self, combobox, list):
        """
        fill combox box with dict item
        
        :param list: contains item to fill the combox
            item must model class
        """
        for models in list:
            model= models()
            name = model.__class__.__name__
            if models.__name__!="NoStructure":
                if hasattr(model, "name"):
                    name = model.name
                combobox.Append(name,models)
        return 0
    
    def _onQrangeEnter(self, event):
        """
        Check validity of value enter in the Q range field
        
        """
        tcrtl = event.GetEventObject()
        #Clear msg if previously shown.
        msg = ""
        wx.PostEvent(self.parent, StatusEvent(status=msg))
        # Flag to register when a parameter has changed.
        is_modified = False
        if tcrtl.GetValue().lstrip().rstrip() != "":
            try:
                value = float(tcrtl.GetValue())
                tcrtl.SetBackgroundColour(wx.WHITE)
                # If qmin and qmax have been modified, update qmin and qmax
                if self._validate_qrange(self.qmin, self.qmax):
                    tempmin = float(self.qmin.GetValue())
                    if tempmin != self.qmin_x:
                        self.qmin_x = tempmin
                    tempmax = float(self.qmax.GetValue())
                    if tempmax != self.qmax_x:
                        self.qmax_x = tempmax
                else:
                    tcrtl.SetBackgroundColour("pink")
                    msg = "Model Error:wrong value entered : %s" % sys.exc_value
                    wx.PostEvent(self.parent, StatusEvent(status=msg))
                    return 
            except:
                tcrtl.SetBackgroundColour("pink")
                msg = "Model Error:wrong value entered : %s" % sys.exc_value
                wx.PostEvent(self.parent, StatusEvent(status=msg))
                return 
            #Check if # of points for theory model are valid(>0).
            if self.npts != None:
                if check_float(self.npts):
                    temp_npts = float(self.npts.GetValue())
                    if temp_npts !=  self.num_points:
                        self.num_points = temp_npts
                        is_modified = True
                else:
                    msg = "Cannot Plot :No npts in that Qrange!!!  "
                    wx.PostEvent(self.parent, StatusEvent(status=msg))
        else:
           tcrtl.SetBackgroundColour("pink")
           msg = "Model Error:wrong value entered!!!"
           wx.PostEvent(self.parent, StatusEvent(status=msg))
        #self._undo.Enable(True)
        self.save_current_state()
        event = PageInfoEvent(page=self)
        wx.PostEvent(self.parent, event)
        self.state_change = False
        #Draw the model for a different range
        self.create_default_data()
        self._draw_model()
                   
    def _theory_qrange_enter(self, event):
        """
        Check validity of value enter in the Q range field
        """
        
        tcrtl= event.GetEventObject()
        #Clear msg if previously shown.
        msg= ""
        wx.PostEvent(self.parent.parent, StatusEvent(status = msg ))
        # Flag to register when a parameter has changed.
        is_modified = False
        if tcrtl.GetValue().lstrip().rstrip()!="":
            try:
                value = float(tcrtl.GetValue())
                tcrtl.SetBackgroundColour(wx.WHITE)

                # If qmin and qmax have been modified, update qmin and qmax
                if self._validate_qrange(self.theory_qmin, self.theory_qmax):
                    tempmin = float(self.theory_qmin.GetValue())
                    if tempmin != self.theory_qmin_x:
                        self.theory_qmin_x = tempmin
                    tempmax = float(self.theory_qmax.GetValue())
                    if tempmax != self.qmax_x:
                        self.theory_qmax_x = tempmax
                else:
                    tcrtl.SetBackgroundColour("pink")
                    msg= "Model Error:wrong value entered : %s"% sys.exc_value
                    wx.PostEvent(self._manager.parent, StatusEvent(status = msg ))
                    return  
            except:
                tcrtl.SetBackgroundColour("pink")
                msg= "Model Error:wrong value entered : %s"% sys.exc_value
                wx.PostEvent(self._manager.parent, StatusEvent(status = msg ))
                return 
            #Check if # of points for theory model are valid(>0).
            if self.Npts_total.IsEditable() :
                if check_float(self.Npts_total):
                    temp_npts = float(self.Npts_total.GetValue())
                    if temp_npts !=  self.num_points:
                        self.num_points = temp_npts
                        is_modified = True
                else:
                    msg= "Cannot Plot :No npts in that Qrange!!!  "
                    wx.PostEvent(self.parent.parent, StatusEvent(status = msg ))
        else:
           tcrtl.SetBackgroundColour("pink")
           msg = "Model Error:wrong value entered!!!"
           wx.PostEvent(self.parent.parent, StatusEvent(status=msg))
        #self._undo.Enable(True)
        self.save_current_state()
        event = PageInfoEvent(page = self)
        wx.PostEvent(self.parent, event)
        self.state_change= False
        #Draw the model for a different range
        self.create_default_data()
        self._draw_model()
                   
    def _on_select_model_helper(self): 
        """
        call back for model selection
        """
        ## reset dictionary containing reference to dispersion
        self._disp_obj_dict = {}
        self.disp_cb_dict ={}
        self.temp_multi_functional = False
        f_id = self.formfactorbox.GetCurrentSelection()
        #For MAC
        form_factor = None
        if f_id >= 0:
            form_factor = self.formfactorbox.GetClientData(f_id)

        if not form_factor in  self.model_list_box["multiplication"]:
            self.structurebox.Hide()
            self.text2.Hide()           
            self.structurebox.Disable()
            self.structurebox.SetSelection(0)
            self.text2.Disable()
        else:
            self.structurebox.Show()
            self.text2.Show()
            self.structurebox.Enable()
            self.text2.Enable()
            
        if form_factor != None:    
            # set multifactor for Mutifunctional models    
            if form_factor().__class__ in self.model_list_box["Multi-Functions"]:
                m_id = self.multifactorbox.GetCurrentSelection()
                multiplicity = form_factor().multiplicity_info[0]
                self.multifactorbox.Clear()
                #self.mutifactor_text.SetLabel(form_factor().details[])
                self._set_multfactor_combobox(multiplicity)
                self._show_multfactor_combobox()
                #ToDo:  this info should be called directly from the model 
                text = form_factor().multiplicity_info[1]#'No. of Shells: '

                #self.mutifactor_text.Clear()
                self.mutifactor_text.SetLabel(text)
                if m_id > multiplicity -1:
                    # default value
                    m_id = 1
                    
                self.multi_factor = self.multifactorbox.GetClientData(m_id)
                if self.multi_factor == None: self.multi_factor =0
                form_factor = form_factor(int(self.multi_factor))
                self.multifactorbox.SetSelection(m_id)
                # Check len of the text1 and max_multiplicity
                text = ''
                if form_factor.multiplicity_info[0] == len(form_factor.multiplicity_info[2]):
                    text = form_factor.multiplicity_info[2][self.multi_factor]
                self.mutifactor_text1.SetLabel(text)
                # Check if model has  get sld profile.
                if len(form_factor.multiplicity_info[3]) > 0:
                    self.sld_axes = form_factor.multiplicity_info[3]
                    self.show_sld_button.Show(True)
                else:
                    self.sld_axes = ""

            else:
                self._hide_multfactor_combobox()
                self.show_sld_button.Hide()
                form_factor = form_factor()
                self.multi_factor = None
        else:
            self._hide_multfactor_combobox()
            self.show_sld_button.Hide()
            self.multi_factor = None  
              
        s_id = self.structurebox.GetCurrentSelection()
        struct_factor = self.structurebox.GetClientData( s_id )
        
        if  struct_factor !=None:
            from sans.models.MultiplicationModel import MultiplicationModel
            self.model= MultiplicationModel(form_factor,struct_factor())
            # multifunctional form factor
            if len(form_factor.non_fittable) > 0:
                self.temp_multi_functional = True
        else:
            if form_factor != None:
                self.model= form_factor
            else:
                self.model = None
                return self.model
            

        ## post state to fit panel
        self.state.parameters =[]
        self.state.model =self.model
        self.state.qmin = self.qmin_x
        self.state.multi_factor = self.multi_factor
        self.disp_list =self.model.getDispParamList()
        self.state.disp_list = self.disp_list
        self.on_set_focus(None)
        self.Layout()     
        
    def _validate_qrange(self, qmin_ctrl, qmax_ctrl):
        """
        Verify that the Q range controls have valid values
        and that Qmin < Qmax.
        
        :param qmin_ctrl: text control for Qmin
        :param qmax_ctrl: text control for Qmax
        
        :return: True is the Q range is value, False otherwise 
        
        """
        qmin_validity = check_float(qmin_ctrl)
        qmax_validity = check_float(qmax_ctrl)
        if not (qmin_validity and qmax_validity):
            return False
        else:
            qmin = float(qmin_ctrl.GetValue())
            qmax = float(qmax_ctrl.GetValue())
            if qmin < qmax:
                #Make sure to set both colours white.  
                qmin_ctrl.SetBackgroundColour(wx.WHITE)
                qmin_ctrl.Refresh()
                qmax_ctrl.SetBackgroundColour(wx.WHITE)
                qmax_ctrl.Refresh()
            else:
                qmin_ctrl.SetBackgroundColour("pink")
                qmin_ctrl.Refresh()
                qmax_ctrl.SetBackgroundColour("pink")
                qmax_ctrl.Refresh()
                msg= "Invalid Q range: Q min must be smaller than Q max"
                wx.PostEvent(self.parent.parent, StatusEvent(status = msg))
                return False
        return True
    
    def _validate_Npts(self):  
        """
        Validate the number of points for fitting is more than 10 points.
        If valid, setvalues Npts_fit otherwise post msg.
        """
        #default flag
        flag = True
        # Theory
        if self.data == None and self.enable2D:
            return flag

        # q value from qx and qy
        radius= numpy.sqrt( self.data.qx_data * self.data.qx_data + 
                            self.data.qy_data * self.data.qy_data )
        #get unmasked index
        index_data = (float(self.qmin.GetValue()) <= radius) & \
                        (radius <= float(self.qmax.GetValue()))
        index_data = (index_data) & (self.data.mask) 
        index_data = (index_data) & (numpy.isfinite(self.data.data))

        if len(index_data[index_data]) < 10:
            # change the color pink.
            self.qmin.SetBackgroundColour("pink")
            self.qmin.Refresh()
            self.qmax.SetBackgroundColour("pink")
            self.qmax.Refresh()
            msg= "Cannot Plot :No or too little npts in that data range!!!  "
            wx.PostEvent(self.parent.parent, StatusEvent(status = msg ))
            self.fitrange = False
            flag = False
        else:
            self.Npts_fit.SetValue(str(len(self.data.mask[index_data==True])))
            self.fitrange = True
            
        return flag
    
    def _check_value_enter(self, list, modified):
        """
        :param list: model parameter and panel info
        :Note: each item of the list should be as follow:
            item=[check button state, parameter's name,
                paramater's value, string="+/-", 
                parameter's error of fit, 
                parameter's minimum value, 
                parrameter's maximum value , 
                parameter's units]
        """  
        is_modified =  modified
        if len(list)==0:
            return is_modified
        for item in list:
            #skip angle parameters for 1D
            if not self.enable2D:#self.data.__class__.__name__ !="Data2D":
                if item in self.orientation_params:
                    continue
            #try:
            name = str(item[1])
            
            if string.find(name,".npts") ==-1 and \
                                        string.find(name,".nsigmas")==-1:      
                ## check model parameters range             
                param_min= None
                param_max= None
               
                ## check minimun value
                if item[5]!= None and item[5]!= "":
                    if item[5].GetValue().lstrip().rstrip()!="":
                        try:
                            
                            param_min = float(item[5].GetValue())
                            if not self._validate_qrange(item[5],item[2]):
                                if numpy.isfinite(param_min):
                                    item[2].SetValue(format_number(param_min))
                            
                            item[5].SetBackgroundColour(wx.WHITE)
                            item[2].SetBackgroundColour(wx.WHITE)
                                           
                        except:
                            msg = "Wrong Fit parameter range entered "
                            wx.PostEvent(self.parent.parent, 
                                         StatusEvent(status = msg))
                            raise ValueError, msg
                        is_modified = True
                ## check maximum value
                if item[6]!= None and item[6]!= "":
                    if item[6].GetValue().lstrip().rstrip()!="":
                        try:                          
                            param_max = float(item[6].GetValue())
                            if not self._validate_qrange(item[2],item[6]):
                                if numpy.isfinite(param_max):
                                    item[2].SetValue(format_number(param_max))  
                            
                            item[6].SetBackgroundColour(wx.WHITE)
                            item[2].SetBackgroundColour(wx.WHITE)
                        except:
                            msg = "Wrong Fit parameter range entered "
                            wx.PostEvent(self.parent.parent, 
                                         StatusEvent(status = msg))
                            raise ValueError, msg
                        is_modified = True
                

                if param_min != None and param_max !=None:
                    if not self._validate_qrange(item[5], item[6]):
                        msg= "Wrong Fit range entered for parameter "
                        msg+= "name %s of model %s "%(name, self.model.name)
                        wx.PostEvent(self.parent.parent, 
                                     StatusEvent(status = msg))
                
                if name in self.model.details.keys():   
                        self.model.details[name][1:3] = param_min, param_max
                        is_modified = True
              
                else:
                        self.model.details [name] = ["", param_min, param_max] 
                        is_modified = True
            try:   
                # Check if the textctr is enabled
                if item[2].IsEnabled():
                    value= float(item[2].GetValue())
                    item[2].SetBackgroundColour("white")
                    # If the value of the parameter has changed,
                    # +update the model and set the is_modified flag
                    if value != self.model.getParam(name) and \
                                                numpy.isfinite(value):
                        self.model.setParam(name, value)
                        
            except:
                item[2].SetBackgroundColour("pink")
                msg = "Wrong Fit parameter value entered "
                wx.PostEvent(self.parent.parent, StatusEvent(status = msg))
                
        return is_modified 
        
 
    def _set_dipers_Param(self, event):
        """
        respond to self.enable_disp and self.disable_disp radio box.
        The dispersity object is reset inside the model into Gaussian. 
        When the user select yes , this method display a combo box for more selection
        when the user selects No,the combo box disappears.
        Redraw the model with the default dispersity (Gaussian)
        """
        #if self.check_invalid_panel():
        #    return 
        ## On selction if no model exists.
        if self.model ==None:
            self.disable_disp.SetValue(True)
            msg="Please select a Model first..."
            wx.MessageBox(msg, 'Info')
            wx.PostEvent(self._manager.parent, StatusEvent(status=\
                            "Polydispersion: %s"%msg))
            return

        self._reset_dispersity()
    
        if self.model ==None:
            self.model_disp.Hide()
            self.sizer4_4.Clear(True)
            return

        if self.enable_disp.GetValue():
            ## layout for model containing no dispersity parameters
            
            self.disp_list= self.model.getDispParamList()
             
            if len(self.disp_list)==0 and len(self.disp_cb_dict)==0:
                self._layout_sizer_noDipers()  
            else:
                ## set gaussian sizer 
                self._on_select_Disp(event=None)
        else:
            self.sizer4_4.Clear(True)
            
        ## post state to fit panel 
        self.save_current_state()
        if event !=None:
            #self._undo.Enable(True)
            event = PageInfoEvent(page = self)
            wx.PostEvent(self.parent, event)
        #draw the model with the current dispersity
        self._draw_model()
        self.sizer4_4.Layout()
        self.sizer5.Layout()
        self.Layout()
        self.Refresh()      
          
        
    def _layout_sizer_noDipers(self):
        """
        Draw a sizer with no dispersity info
        """
        ix=0
        iy=1
        self.fittable_param=[]
        self.fixed_param=[]
        self.orientation_params_disp=[]
        
        self.sizer4_4.Clear(True)
        text = "No polydispersity available for this model"
        text = "No polydispersity available for this model"
        model_disp = wx.StaticText(self, -1, text)
        self.sizer4_4.Add(model_disp,( iy, ix),(1,1),  
                            wx.LEFT|wx.EXPAND|wx.ADJUST_MINSIZE, 10)
        self.sizer4_4.Layout()
        self.sizer4.Layout()
    
    def _reset_dispersity(self):
        """
        put gaussian dispersity into current model
        """
        if len(self.param_toFit)>0:
            for item in self.fittable_param:
                if item in self.param_toFit:
                    self.param_toFit.remove(item)

            for item in self.orientation_params_disp:
                if item in self.param_toFit:
                    self.param_toFit.remove(item)
         
        self.fittable_param=[]
        self.fixed_param=[]
        self.orientation_params_disp=[]
        self.values={}
        self.weights={}
      
        from sans.models.dispersion_models import GaussianDispersion, ArrayDispersion
        if len(self.disp_cb_dict)==0:
            self.save_current_state()
            self.sizer4_4.Clear(True)
            self.Layout()
 
            return 
        if (len(self.disp_cb_dict)>0) :
            for p in self.disp_cb_dict:
                # The parameter was un-selected. Go back to Gaussian model (with 0 pts)                    
                disp_model = GaussianDispersion()
               
                self._disp_obj_dict[p] = disp_model
                # Set the new model as the dispersion object for the selected parameter
                try:
                   self.model.set_dispersion(p, disp_model)
                except:

                    pass

        ## save state into
        self.save_current_state()
        self.Layout()  
        self.Refresh()
                  
    def _on_select_Disp(self,event):
        """
        allow selecting different dispersion
        self.disp_list should change type later .now only gaussian
        """
        self._set_sizer_dispersion()

        ## Redraw the model
        self._draw_model() 
        #self._undo.Enable(True)
        event = PageInfoEvent(page = self)
        wx.PostEvent(self.parent, event)
        
        self.sizer4_4.Layout()
        self.sizer4.Layout()
        self.SetupScrolling()
    
    def _on_disp_func(self, event=None): 
        """
        Select a distribution function for the polydispersion
        
        :Param event: ComboBox event 
        """
        # get ready for new event
        if event != None:
            event.Skip()
        # Get event object
        disp_box =  event.GetEventObject() 

        # Try to select a Distr. function
        try:   
            disp_box.SetBackgroundColour("white")
            selection = disp_box.GetCurrentSelection()
            param_name = disp_box.Name.split('.')[0]
            disp_name = disp_box.GetValue()
            dispersity= disp_box.GetClientData(selection)
    
            #disp_model =  GaussianDispersion()
            disp_model = dispersity()
            # Get param names to reset the values of the param
            name1 = param_name + ".width"
            name2 = param_name + ".npts"
            name3 = param_name + ".nsigmas"
            # Check Disp. function whether or not it is 'array'
            if disp_name.lower() == "array":
                value2= ""
                value3= ""
                value1 = self._set_array_disp(name=name1, disp=disp_model)
            else:
                self._del_array_values(name1)
                #self._reset_array_disp(param_name)
                self._disp_obj_dict[name1] = disp_model
                self.model.set_dispersion(param_name, disp_model)
                self.state._disp_obj_dict[name1]= disp_model
 
                value1= str(format_number(self.model.getParam(name1), True))
                value2= str(format_number(self.model.getParam(name2)))
                value3= str(format_number(self.model.getParam(name3)))
            # Reset fittable polydispersin parameter value
            for item in self.fittable_param:
                 if item[1] == name1:
                    item[2].SetValue(value1) 
                    item[5].SetValue("")
                    item[6].SetValue("")
                    # Disable for array
                    if disp_name.lower() == "array":
                        item[0].SetValue(False)
                        item[0].Disable()
                        item[2].Disable()
                        item[5].Disable()
                        item[6].Disable()
                    else:
                        item[0].Enable()
                        item[2].Enable()
                        item[5].Enable()
                        item[6].Enable()                       
                    break
            # Reset fixed polydispersion params
            for item in self.fixed_param:
                if item[1] == name2:
                    item[2].SetValue(value2) 
                    # Disable Npts for array
                    if disp_name.lower() == "array":
                        item[2].Disable()
                    else:
                        item[2].Enable()
                if item[1] == name3:
                    item[2].SetValue(value3) 
                    # Disable Nsigs for array
                    if disp_name.lower() == "array":
                        item[2].Disable()
                    else:
                        item[2].Enable()
                
            # Make sure the check box updated when all checked
            if self.cb1.GetValue():
                self.select_all_param(None)

            # update params
            self._update_paramv_on_fit() 
            # draw
            self._draw_model()
            self.Refresh()
        except:
            # Error msg
            msg = "Error occurred:"
            msg += " Could not select the distribution function..."
            msg += " Please select another distribution function."
            disp_box.SetBackgroundColour("pink")
            # Focus on Fit button so that users can see the pinky box
            self.btFit.SetFocus()
            wx.PostEvent(self.parent.parent, 
                         StatusEvent(status=msg, info="error"))
        
        
    def _set_array_disp(self, name=None, disp=None):
        """
        Set array dispersion
        
        :param name: name of the parameter for the dispersion to be set
        :param disp: the polydisperion object
        """
        # The user wants this parameter to be averaged. 
        # Pop up the file selection dialog.
        path = self._selectDlg()
        # Array data
        values = []
        weights = []
        # If nothing was selected, just return
        if path is None:
            self.disp_cb_dict[name].SetValue(False)
            #self.noDisper_rbox.SetValue(True)
            return
        self._default_save_location = os.path.dirname(path)
        if self.parent != None:
            self.parent.parent._default_save_location =\
                             self._default_save_location

        basename  = os.path.basename(path)
        values,weights = self.read_file(path)
        
        # If any of the two arrays is empty, notify the user that we won't
        # proceed
        if len(self.param_toFit)>0:
            if name in self.param_toFit:
                self.param_toFit.remove(name)

        # Tell the user that we are about to apply the distribution
        msg = "Applying loaded %s distribution: %s" % (name, path)
        wx.PostEvent(self.parent.parent, StatusEvent(status=msg))  

        disp.set_weights(values, weights)
        self._disp_obj_dict[name] = disp
        self.model.set_dispersion(name.split('.')[0], disp)
        self.state._disp_obj_dict[name]= disp
        self.values[name] = values
        self.weights[name] = weights
        # Store the object to make it persist outside the
        # scope of this method
        #TODO: refactor model to clean this up?
        self.state.values = {}
        self.state.weights = {}
        self.state.values = copy.deepcopy(self.values)
        self.state.weights = copy.deepcopy(self.weights)

        # Set the new model as the dispersion object for the 
        #selected parameter
        #self.model.set_dispersion(p, disp_model)
        # Store a reference to the weights in the model object 
        #so that
        # it's not lost when we use the model within another thread.
        #TODO: total hack - fix this
        self.state.model= self.model.clone()
        self.model._persistency_dict[name.split('.')[0]] = \
                                        [values, weights]
        self.state.model._persistency_dict[name.split('.')[0]] = \
                                        [values,weights]
        return basename
    
    def _del_array_values(self, name=None):  
        """
        Reset array dispersion
        
        :param name: name of the parameter for the dispersion to be set 
        """
        # Try to delete values and weight of the names array dic if exists
        try:
            del self.values[name]
            del self.weights[name]
            # delete all other dic
            del self.state.values[name]
            del self.state.weights[name]
            del self.model._persistency_dict[name.split('.')[0]] 
            del self.state.model._persistency_dict[name.split('.')[0]]
        except:
            pass
                                            
    def _lay_out(self):
        """
        returns self.Layout
        
        :Note: Mac seems to like this better when self.
            Layout is called after fitting.
        """
        self._sleep4sec()
        self.Layout()
        return 
    
    def _sleep4sec(self):
        """
            sleep for 1 sec only applied on Mac
            Note: This 1sec helps for Mac not to crash on self.:ayout after self._draw_model
        """
        if ON_MAC == True:
            time.sleep(1)
            
    def _find_polyfunc_selection(self, disp_func = None):
        """
        FInd Comboox selection from disp_func 
        
        :param disp_function: dispersion distr. function
        """
        # List of the poly_model name in the combobox
        list = ["RectangleDispersion", "ArrayDispersion", 
                    "LogNormalDispersion", "GaussianDispersion", 
                    "SchulzDispersion"]

        # Find the selection
        try:
            selection = list.index(disp_func.__class__.__name__)
            return selection
        except:
             return 3
                            
    def on_reset_clicked(self,event):
        """
        On 'Reset' button  for Q range clicked
        """
        flag = True
        #if self.check_invalid_panel():
        #    return
        ##For 3 different cases: Data2D, Data1D, and theory
        if self.model == None:
            msg="Please select a model first..."
            wx.MessageBox(msg, 'Info')
            flag = False
            return
            
        elif self.data.__class__.__name__ == "Data2D":
            data_min= 0
            x= max(math.fabs(self.data.xmin), math.fabs(self.data.xmax)) 
            y= max(math.fabs(self.data.ymin), math.fabs(self.data.ymax))
            self.qmin_x = data_min
            self.qmax_x = math.sqrt(x*x + y*y)
            # check smearing
            if not self.disable_smearer.GetValue():
                temp_smearer= self.current_smearer
                ## set smearing value whether or not the data contain the smearing info
                if self.pinhole_smearer.GetValue():
                    flag = self.update_pinhole_smear()
                else:
                    flag = True
                    
        elif self.data == None:
            self.qmin_x = _QMIN_DEFAULT
            self.qmax_x = _QMAX_DEFAULT
            self.num_points = _NPTS_DEFAULT            
            self.state.npts = self.num_points
            
        elif self.data.__class__.__name__ != "Data2D":
            self.qmin_x = min(self.data.x)
            self.qmax_x = max(self.data.x)
            # check smearing
            if not self.disable_smearer.GetValue():
                temp_smearer= self.current_smearer
                ## set smearing value whether or not the data contain the smearing info
                if self.slit_smearer.GetValue():
                    flag = self.update_slit_smear()
                elif self.pinhole_smearer.GetValue():
                    flag = self.update_pinhole_smear()
                else:
                    flag = True
        else:
            flag = False
            
        if flag == False:
            msg= "Cannot Plot :Must enter a number!!!  "
            wx.PostEvent(self.parent.parent, StatusEvent(status = msg ))
        else:
            # set relative text ctrs.
            self.qmin.SetValue(str(self.qmin_x))
            self.qmax.SetValue(str(self.qmax_x))
            self.set_npts2fit()
            # At this point, some button and variables satatus (disabled?) should be checked 
            # such as color that should be reset to white in case that it was pink.
            self._onparamEnter_helper()

        self.save_current_state()
        self.state.qmin = self.qmin_x
        self.state.qmax = self.qmax_x
        
        #reset the q range values
        self._reset_plotting_range(self.state)
        #self.compute_chisqr(smearer=self.current_smearer)
        #Re draw plot
        self._draw_model()
        
    def get_images(self):
        """
        Get the images of the plots corresponding this panel for report
        
        : return graphs: list of figures
        : TODO: Move to guiframe
        """
        # set list of graphs
        graphs = []
        canvases = []
        # call gui_manager
        gui_manager = self.parent.parent
        # loops through the panels [dic]
        for item1, item2 in gui_manager.plot_panels.iteritems():
             data_title = self.data.group_id
             data_name = str(self.data.name).split(" [")[0]
            # try to get all plots belonging to this control panel
             try:
                 title = ''
                 # check titles (main plot) 
                 if hasattr(item2,"data2D"):
                     title = item2.data2D.title
                 # and data_names (model plot[2D], and residuals)
                 if item2.group_id == data_title or \
                        item2.group_id.count("res" + str(self.graph_id)) or \
                        item2.group_id.count(str(self.uid)) > 0:
                     #panel = gui_manager._mgr.GetPane(item2.window_name)
                     # append to the list
                     graphs.append(item2.figure) 
                     canvases.append(item2.canvas)     
             except:
                 # Not for control panels
                 pass
        # return the list of graphs
        return graphs, canvases

    def on_model_help_clicked(self,event):
        """
        on 'More details' button
        """
        from help_panel import  HelpWindow
        from sans.models import get_data_path
        
        # Get models help model_function path
        path = get_data_path(media='media')
        model_path = os.path.join(path,"model_functions.html")
        if self.model == None:
            name = 'FuncHelp'
        else:
            name = self.formfactorbox.GetValue()
            #name = self.model.__class__.__name__
        frame = HelpWindow(None, -1,  pageToOpen=model_path)    
        frame.Show(True)
        if frame.rhelp.HasAnchor(name):
            frame.rhelp.ScrollToAnchor(name)
        else:
           msg= "Model does not contains an available description "
           msg +="Please try searching in the Help window"
           wx.PostEvent(self.parent.parent, StatusEvent(status = msg ))      
    
    def on_pd_help_clicked(self, event):
        """
        Button event for PD help
        """
        from help_panel import  HelpWindow
        import sans.models as models 
        
        # Get models help model_function path
        path = models.get_data_path(media='media')
        pd_path = os.path.join(path,"pd_help.html")

        frame = HelpWindow(None, -1,  pageToOpen=pd_path)    
        frame.Show(True)
        
    def on_left_down(self, event):
        """
        Get key stroke event
        """
        # Figuring out key combo: Cmd for copy, Alt for paste
        if event.CmdDown() and event.ShiftDown():
            flag = self.get_paste()
        elif event.CmdDown():
            flag = self.get_copy()
        else:
            event.Skip()
            return
        # make event free
        event.Skip()
        
    def get_copy(self):
        """
        Get copy params to clipboard
        """
        content = self.get_copy_params() 
        flag = self.set_clipboard(content)
        self._copy_info(flag) 
        return flag 
            
    def get_copy_params(self): 
        """
        Get the string copies of the param names and values in the tap
        """  
        content = 'sansview_parameter_values:'
        # Do it if params exist        
        if  self.parameters !=[]:
            
            # go through the parameters 
            string = self._get_copy_helper(self.parameters, 
                                           self.orientation_params)
            content += string
            
            # go through the fittables
            string = self._get_copy_helper(self.fittable_param, 
                                           self.orientation_params_disp)
            content += string

            # go through the fixed params
            string = self._get_copy_helper(self.fixed_param, 
                                           self.orientation_params_disp)
            content += string
                
            # go through the str params
            string = self._get_copy_helper(self.str_parameters, 
                                           self.orientation_params)
            content += string
            return content
        else:
            return False
    
    def set_clipboard(self, content=None): 
        """
        Put the string to the clipboard
        """   
        if not content:
            return False
        if wx.TheClipboard.Open():
            wx.TheClipboard.SetData(wx.TextDataObject(str(content)))
            data = wx.TextDataObject()
            success = wx.TheClipboard.GetData(data)
            text = data.GetText()
            wx.TheClipboard.Close()
            return True
        return None
    
    def _get_copy_helper(self, param, orient_param):
        """
        Helping get value and name of the params
        
        : param param:  parameters
        : param orient_param = oritational params
        : return content: strings [list] [name,value:....]
        """
        content = ''
        # go through the str params
        for item in param: 
            # 2D
            if self.data.__class__.__name__== "Data2D":
                name = item[1]
                value = item[2].GetValue()
            # 1D
            else:
                ## for 1D all parameters except orientation
                if not item[1] in orient_param:
                    name = item[1]
                    value = item[2].GetValue()
            # add to the content
            content += name + ',' + value + ':'
            
        return content
   
    def get_clipboard(self):   
        """
        Get strings in the clipboard
        """
        text = ""  
        # Get text from the clip board        
        if wx.TheClipboard.Open():
           if wx.TheClipboard.IsSupported(wx.DataFormat(wx.DF_TEXT)):
               data = wx.TextDataObject()
               # get wx dataobject
               success = wx.TheClipboard.GetData(data)
               # get text
               text = data.GetText()
           # close clipboard
           wx.TheClipboard.Close()
           
        return text
    
    def get_paste(self):
        """
        Paste params from the clipboard
        """
        text = self.get_clipboard()
        flag = self.get_paste_params(text)
        self._copy_info(flag)
        return flag
        
    def get_paste_params(self, text=''): 
        """
        Get the string copies of the param names and values in the tap
        """  
        context = {}    
        # put the text into dictionary    
        lines = text.split(':')
        if lines[0] != 'sansview_parameter_values':
            self._copy_info(False)
            return False
        for line in lines[1:-1]:
            if len(line) != 0:
                item =line.split(',')
                name = item[0]
                value = item[1]
                # Transfer the text to content[dictionary]
                context[name] = value
        
        # Do it if params exist        
        if  self.parameters != []:
            # go through the parameters  
            self._get_paste_helper(self.parameters, 
                                   self.orientation_params, context)

            # go through the fittables
            self._get_paste_helper(self.fittable_param, 
                                   self.orientation_params_disp, context)

            # go through the fixed params
            self._get_paste_helper(self.fixed_param, 
                                   self.orientation_params_disp, context)
            
            # go through the str params
            self._get_paste_helper(self.str_parameters, 
                                   self.orientation_params, context)
            return True
        return None
    
    def _get_paste_helper(self, param, orient_param, content):
        """
        Helping set values of the params
        
        : param param:  parameters
        : param orient_param: oritational params
        : param content: dictionary [ name, value: name1.value1,...] 
        """
        # go through the str params
        for item in param: 
            # 2D
            if self.data.__class__.__name__== "Data2D":
                name = item[1]
                if name in content.keys():
                    item[2].SetValue(content[name])
            # 1D
            else:
                ## for 1D all parameters except orientation
                if not item[1] in orient_param:
                    name = item[1]
                    if name in content.keys():
                        # Avoid changing combox content which needs special care
                        value = content[name]
                        item[2].SetValue(value)
                        if item[2].__class__.__name__ == "ComboBox":
                            if self.model.fun_list.has_key(value):
                                fun_val = self.model.fun_list[value]
                                self.model.setParam(name,fun_val)
                                # save state
                                #self._copy_parameters_state(self.str_parameters, 
                                #    self.state.str_parameters)