source: sasview/sansview/perspectives/fitting/basepage.py @ 1b43306

import sys, os
import wx
import numpy
import time
import copy 
import math
import string
from sans.guiframe.utils import format_number,check_float
from sans.guicomm.events import StatusEvent
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 = 0.001
_QMAX_DEFAULT = 0.13
_NPTS_DEFAULT = 50
#Control panel width 
if sys.platform.count("darwin")==0:
    PANEL_WIDTH = 450
    FONT_VARIANT = 0
    ON_MAC = False
else:
    PANEL_WIDTH = 500
    FONT_VARIANT = 1
    ON_MAC = True
    
class BasicPage(wx.ScrolledWindow):
    """
    This class provide general structure of  fitpanel page
    """
     ## Internal name for the AUI manager
    window_name = "Basic Page"
    ## Title to appear on top of the window
    window_caption = "Basic page "
    
    def __init__(self,parent, page_info):
        """
        """
        wx.ScrolledWindow.__init__(self, parent,
                 style= wx.FULL_REPAINT_ON_RESIZE )
        #Set window's font size 
        self.SetWindowVariant(variant=FONT_VARIANT)
        ##window_name
       
        ## parent of the page
        self.parent = parent
        ## manager is the fitting plugin
        self.manager= None
        ## owner of the page (fitting plugin)
        self.event_owner= None
         ## current model
        self.model = None
        ## data
        self.data = None
        self.mask = None
        self.theory = None
        self.state = PageState(parent=parent)
        ## dictionary containing list of models
        self.model_list_box = None
        self.set_page_info(page_info=page_info)
        ## Data member to store the dispersion object created
        self._disp_obj_dict = {}
        ## selected parameters to apply dispersion
        self.disp_cb_dict ={}

        ## smearer object
        self.smearer = None
        
        ##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=[]
        ## 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()
        
        ##enable model 2D draw
        self.enable2D= False
        ## check that the fit range is correct to plot the model again
        self.fitrange= True

        ## Q range
        self.qmin_x= _QMIN_DEFAULT
        self.qmax_x= _QMAX_DEFAULT
        self.num_points= _NPTS_DEFAULT
        
        ## 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._undo = wx.MenuItem(self.popUpMenu,id, "Undo","cancel the previous action")
        #self.popUpMenu.AppendItem(self._undo)
        #self._undo.Enable(False)
        #wx.EVT_MENU(self, id, self.onUndo)
        
        #id = wx.NewId()
        #self._redo = wx.MenuItem(self.popUpMenu,id,"Redo"," Restore the previous action")
        #self.popUpMenu.AppendItem(self._redo)
        #self._redo.Enable(False)
        #wx.EVT_MENU(self, id, self.onRedo)       
        #self.popUpMenu.AppendSeparator()
        #if sys.platform.count("win32")>0:        
        id = wx.NewId()
        self._keep = wx.MenuItem(self.popUpMenu,id,"BookMark"," Keep the panel status to recall it later")
        self.popUpMenu.AppendItem(self._keep)
        self._keep.Enable(True)
        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)

        ## create the basic structure of the panel with empty sizer
        self.define_page_structure()
        ## drawing Initial dispersion parameters sizer 
        self.set_dispers_sizer()
        self._fill_save_sizer()
        ## layout
        self.set_layout()
       
    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):
            """
            do nothing to kill focus
            """
            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
        """
        #print "enable undo"
        event = PreviousStateEvent(page = self)
        wx.PostEvent(self.parent, event)
        
    def onRedo(self, event):
        """
        Restore the previous action cancelled 
        """
        #print "enable redo"
        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.set_scroll()
        self.Centre()
    
    def set_scroll(self):
        """
        """
        self.SetScrollbars(20,20,25,65)
        self.Layout()   
        self.SetAutoLayout(True)
         
    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_data(self):
        """
        return the current data 
        """
        return self.data  
    
    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
        
    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))
       
        
        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((10,10))
        
        ## fill a sizer with the combobox to select dispersion type
        sizer_select_dispers = wx.BoxSizer(wx.HORIZONTAL)  
        self.model_disp = wx.StaticText(self, -1, 'Distribution Function ')
            
        import sans.models.dispersion_models 
        self.polydisp= sans.models.dispersion_models.models
        self.disp_box = wx.ComboBox(self, -1)

        for key, value in self.polydisp.iteritems():
            name = str(key)
            self.disp_box.Append(name,value)
        self.disp_box.SetStringSelection("gaussian") 
        wx.EVT_COMBOBOX(self.disp_box,-1, self._on_select_Disp) 
             
        sizer_select_dispers.Add((10,10)) 
        sizer_select_dispers.Add(self.model_disp) 
        sizer_select_dispers.Add(self.disp_box,0,
                wx.TOP|wx.BOTTOM|wx.LEFT|wx.EXPAND|wx.ADJUST_MINSIZE,border=5)
      
        self.model_disp.Hide()
        self.disp_box.Hide()
        
        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(5,5)
        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.SetScrollbars(20,20,25,65)
        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()

    def select_disp_angle(self, event): 
        """
        Event for when a user select a parameter to average over.
        
        :param event: radiobutton event
        
        """
        self.values=[]
        self.weights=[]
        if event.GetEventObject()==self.noDisper_rbox:
            if self.noDisper_rbox.GetValue():
                #No array dispersity apply yet
                self._reset_dispersity()
                ## Redraw the model ???
                self._draw_model()
        # Go through the list of dispersion check boxes to identify which one has changed 
        for p in self.disp_cb_dict:
            self.state.disp_cb_dict[p]=  self.disp_cb_dict[p].GetValue()
            # Catch which one of the box was just checked or unchecked.
            if event.GetEventObject() == self.disp_cb_dict[p]:              
                if self.disp_cb_dict[p].GetValue() == True:
                    
                    ##Temp. FIX for V1.0 regarding changing checkbox to radiobutton.
                    ##This (self._reset_dispersity) should be removed when the array dispersion is fixed.                
                    self._reset_dispersity()

                    # The user wants this parameter to be averaged. 
                    # Pop up the file selection dialog.
                    path = self._selectDlg()
                    
                    # If nothing was selected, just return
                    if path is None:
                        self.disp_cb_dict[p].SetValue(False)
                        self.noDisper_rbox.SetValue(True)
                        return
                    try:
                        self._default_save_location = os.path.dirname(path)
                    except:
                        pass 
                    try:
                        self.values,self.weights = self.read_file(path)
                    except:
                        msg="Could not read input file"
                        wx.PostEvent(self.parent.parent, StatusEvent(status= msg))
                        return
                    
                    # If any of the two arrays is empty, notify the user that we won't
                    # proceed 
                    if self.values is None or self.weights is None or \
                         self.values ==[] or self.weights ==[]:
                        wx.PostEvent(self.parent.parent, StatusEvent(status=\
                            "The loaded %s distrubtion is corrupted or empty" % p))
                        return
                        
                    # Tell the user that we are about to apply the distribution
                    wx.PostEvent(self.parent.parent, StatusEvent(status=\
                            "Applying loaded %s distribution: %s" % (p, path)))  
                    
                    # Create the dispersion objects
                    from sans.models.dispersion_models import ArrayDispersion
                    disp_model = ArrayDispersion()
                    disp_model.set_weights(self.values, self.weights)
                   
                    # Store the object to make it persist outside the scope of this method
                    #TODO: refactor model to clean this up?
                    self._disp_obj_dict[p] = disp_model
                    self.state._disp_obj_dict [p]= disp_model
                    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 = {}
                    self.model._persistency_dict[p] = [self.values, self.weights]
                    self.state.model._persistency_dict[p] = [self.values, self.weights]
                else:
                    self._reset_dispersity()
              
                ## Redraw the model
                self._draw_model()
        
        ## post state to fit panel
        event = PageInfoEvent(page = self)
        wx.PostEvent(self.parent, event)
       
    
    def onResetModel(self, event):
        """
        Reset model state
        """
        ## post help message for the selected model 
        msg = self.popUpMenu.GetHelpString(event.GetId())
        msg +=" reloaded"
        wx.PostEvent(self.parent.parent, StatusEvent(status = msg ))
        
        name= self.popUpMenu.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.reset_page(previous_state)      
         
    def on_save_state(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
        dlg = wx.FileDialog(self, "Choose a file", self._default_save_location,
                                                 "", "*.fitv", wx.SAVE)
        if dlg.ShowModal() == wx.ID_OK:
            path = dlg.GetPath()
            self._default_save_location = os.path.dirname(path)
        else:
            return None
        #the manager write the state into file
        self.manager.save_fit_state(filepath=path, fitstate=new_state)
        return new_state  
      
    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 
        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
        """
        ## 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()

        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)
        try:
            n = self.disp_box.GetCurrentSelection()
            dispersity= self.disp_box.GetClientData(n)
            name= dispersity.__name__
            self.disp_name = name
            if name == "GaussianDispersion" :
               if hasattr(self,"cb1"):
                   self.state.cb1= self.cb1.GetValue()
        except:
            pass
        
        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.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 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()
        
        self.state.orientation_params =[]
        self.state.orientation_params_disp =[]
        self.state.parameters =[]
        self.state.fittable_param =[]
        self.state.fixed_param =[]

        
        ## 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 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)
        try:
            n = self.disp_box.GetCurrentSelection()
            dispersity= self.disp_box.GetClientData(n)
            name= dispersity.__name__
            self.disp_name = name
            if name == "GaussianDispersion" :
               if hasattr(self,"cb1"):
                   self.state.cb1= self.cb1.GetValue()

        except:
            pass
        
        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.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 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 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 
       
        self.model= state.model
        self.data = state.data
        if self.data !=None:
            from DataLoader.qsmearing import smear_selection
            self.smearer= smear_selection(self.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)
        ##draw sizer containing model parameters value for the current model
        self._set_model_sizer_selection( self.model )
        self.set_model_param_sizer(self.model)

        ## reset value of combox box
        self.structurebox.SetSelection(state.structurecombobox )
        self.formfactorbox.SetSelection(state.formfactorcombobox)
        
        
        ## enable the view 2d button if this is a modelpage type
        if hasattr(self,"model_view"):
            if self.enable2D:
                self.model_view.Disable()
            else:
                self.model_view.Enable()
        ## set the select all check box to the a given state
        if hasattr(self, "cb1"):   
            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.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)

        ##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)
        ## 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 context menu items
        self._reset_context_menu()
    
        ## set the value of the current state to the state given as parameter
        self.state = state.clone() 
        self._draw_model()

    def _selectDlg(self):
        """
        open a dialog file to selected the customized dispersity 
        """
        import os
        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()
            self.popUpMenu.Append(id,name, 'Save model and state %g'%self.number_saved_state)
            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)) 
        if self.state.npts!=None:
            self.npts.SetValue(str(state.npts)) 
            
    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 
        if self.npts!=None:
            self.state.npts= self.num_points
            
            
    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:
                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_nodraw(smearer=temp_smearer, qmin= float(self.qmin_x),
                                                 qmax= float(self.qmax_x))
                elif not self._is_2D():
                    self.manager.set_smearer(smearer=temp_smearer, qmin= float(self.qmin_x),
                                                 qmax= float(self.qmax_x))
                    index_data = ((self.qmin_x <= self.data.x)&(self.data.x <= self.qmax_x))
                    self.Npts_fit.SetValue(str(len(self.data.x[index_data==True])))
                    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():self.btEditMask.Enable(True)

        if not flag:
            msg= "Cannot Plot or Fit :Must select a 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[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
                if item_page_info[5][0]:
                    item_page[5].Show(True)
                    item_page[5].SetValue(item_page_info[5][1])
                else:
                    item_page[5].Hide()
                    
            if item_page[6]!=None:
                ## show of hide the text crtl for fitting error
                if item_page_info[6][0]:
                    item_page[6].Show(True)
                    item_page[6].SetValue(item_page_info[6][1])
                else:
                    item_page[6].Hide()
                                      
    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()
                self.SetScrollbars(20,20,25,65)
                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)
                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)
                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):
        """
        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.
        """
        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
            
            self.manager.draw_model(self.model, 
                                    data=self.data,
                                    smearer= temp_smear,
                                    qmin=float(self.qmin_x), 
                                    qmax=float(self.qmax_x),
                                    qstep= float(self.num_points),
                                    enable2D=self.enable2D)
        
    def _set_model_sizer(self,sizer, box_sizer, title="", object=None):
        """
        Use lists to fill a sizer for model info
        """
       
        sizer.Clear(True)
        ##For MAC, this should defined here.
        if box_sizer == None:
            box_description= wx.StaticBox(self, -1,str(title))
            boxsizer1 = wx.StaticBoxSizer(box_description, wx.VERTICAL)
        else:
            boxsizer1 = box_sizer
            
        #--------------------------------------------------------
        self.shape_rbutton = wx.RadioButton(self, -1, 'Shapes', style=wx.RB_GROUP)
        self.shape_indep_rbutton = wx.RadioButton(self, -1, "Shape-Independent")
        self.struct_rbutton = wx.RadioButton(self, -1, "Structure Factor ")
        self.plugin_rbutton = wx.RadioButton(self, -1, "Customized Models")
                
        self.Bind( wx.EVT_RADIOBUTTON, self._show_combox,
                            id= self.shape_rbutton.GetId() ) 
        self.Bind( wx.EVT_RADIOBUTTON, self._show_combox,
                            id= self.shape_indep_rbutton.GetId() ) 
        self.Bind( wx.EVT_RADIOBUTTON, self._show_combox,
                            id= self.struct_rbutton.GetId() ) 
        self.Bind( wx.EVT_RADIOBUTTON, self._show_combox,
                            id= self.plugin_rbutton.GetId() )  
        #MAC needs SetValue
        self.shape_rbutton.SetValue(True)
      
        sizer_radiobutton = wx.GridSizer(2, 2,5, 5)
        sizer_radiobutton.Add(self.shape_rbutton)
        sizer_radiobutton.Add(self.shape_indep_rbutton)
        sizer_radiobutton.Add(self.plugin_rbutton)
        sizer_radiobutton.Add(self.struct_rbutton)
        
        sizer_selection = wx.BoxSizer(wx.HORIZONTAL)
        
        self.text1 = wx.StaticText( self,-1,"" )
        self.text2 = wx.StaticText( self,-1,"P(Q)*S(Q)" )
        
        
        self.formfactorbox = wx.ComboBox(self, -1,style=wx.CB_READONLY)
        if self.model!= None:
            self.formfactorbox.SetValue(self.model.name)
           
        self.structurebox = wx.ComboBox(self, -1,style=wx.CB_READONLY)
        
        self.initialize_combox()
             
        wx.EVT_COMBOBOX(self.formfactorbox,-1, self._on_select_model)
        wx.EVT_COMBOBOX(self.structurebox,-1, self._on_select_model)
        
       
        ## check model type to show sizer
        if self.model !=None:
            self._set_model_sizer_selection( self.model )
        
        sizer_selection.Add(self.text1)
        sizer_selection.Add((5,5))
        sizer_selection.Add(self.formfactorbox)
        sizer_selection.Add((5,5))
        sizer_selection.Add(self.text2)
        sizer_selection.Add((5,5))
        sizer_selection.Add(self.structurebox)
        sizer_selection.Add((5,5))
        
        boxsizer1.Add( sizer_radiobutton )
        boxsizer1.Add( (20,20))
        boxsizer1.Add( sizer_selection )
        if object !=None:
            boxsizer1.Add( (-72,-72))
            boxsizer1.Add( object,  0, wx.ALIGN_RIGHT| wx.RIGHT, 35)
            boxsizer1.Add( (60,60))
        #--------------------------------------------------------
        sizer.Add(boxsizer1,0, wx.EXPAND | wx.ALL, 10)
        sizer.Layout()
        self.SetScrollbars(20,20,25,65)
        
    def _show_combox(self, event):
        """
        Show combox box associate with type of model selected
        """
        if self.check_invalid_panel():
            self.shape_rbutton.SetValue(True)
            return

        ## Don't want to populate combo box again if the event comes from check box
        if self.shape_rbutton.GetValue()and\
             event.GetEventObject()==self.shape_rbutton:
            ##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()and\
             event.GetEventObject()==self.shape_indep_rbutton:
            ##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() and\
             event.GetEventObject()==self.struct_rbutton:
            ##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()and\
             event.GetEventObject()==self.plugin_rbutton:
           
            ##fill the combobox with form factor list
            self.structurebox.Disable()
            self.formfactorbox.Clear()
            self._populate_box( self.formfactorbox,
                                self.model_list_box["Customized Models"])
        
        self._on_select_model(event=None)
        self._save_typeOfmodel()
        self.sizer4_4.Layout()
        self.sizer4.Layout()
        self.Layout()
        self.Refresh()
        self.SetScrollbars(20,20,25,65)
            
    def _populate_box(self, combobox, list):
        """
        fill combox box with dict item
        
        :param list: contains item to fill the combox
            item must model class
        """
        st = time.time()
        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.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.parent, StatusEvent(status = msg ))
                    return 
                
            except:
                tcrtl.SetBackgroundColour("pink")
                msg= "Model Error:wrong value entered : %s"% sys.exc_value
                wx.PostEvent(self.parent.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.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._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 ={}
        
        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 self.data.__class__.__name__ =="Data2D":
            #self.smear_description_2d.Show(True)
            
        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())
            
        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.disp_list =self.model.getDispParamList()
        self.state.disp_list = self.disp_list
        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

        # 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 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:     
                value= float(item[2].GetValue())
      
                # 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)
                    is_modified = True   
            except:
                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.disp_box.Hide()
            self.sizer4_4.Clear(True)
            return

        if self.enable_disp.GetValue():
            self.model_disp.Show(True)
            self.disp_box.Show(True)
            ## 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.model_disp.Hide()
            self.disp_box.Hide()
            self.disp_box.SetSelection(0) 
            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.model_disp.Hide()
        self.disp_box.Hide()
        self.sizer4_4.Clear(True)
        model_disp = wx.StaticText(self, -1, 'No PolyDispersity for this model')
        self.sizer4_4.Add(model_disp,( iy, ix),(1,1),  wx.LEFT|wx.EXPAND|wx.ADJUST_MINSIZE, 15)
        self.sizer4_4.Layout()
        self.sizer4.Layout()
        self.SetScrollbars(20,20,25,65)
      
            
    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
        """
        n = self.disp_box.GetCurrentSelection()
        name = self.disp_box.GetValue()
        dispersity= self.disp_box.GetClientData(n)
        self.disp_name = name
        
        if name.lower() == "array":
            self._set_sizer_arraydispersion()
        else:
            self._set_sizer_dispersion(dispersity= dispersity)
            
        self.state.disp_box= n
        ## 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.SetScrollbars(20,20,25,65)
        
    def _set_sizer_arraydispersion(self):
        """
        draw sizer with array dispersity  parameters
        """
        
        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)
        for item in self.model.details.keys():
            if item in self.model.fixed:
                del self.model.details [item]                           

        self.fittable_param=[]
        self.fixed_param=[]
        self.orientation_params_disp=[]
        self.sizer4_4.Clear(True) 
        self._reset_dispersity()
        ix=0
        iy=1     
        disp1 = wx.StaticText(self, -1, 'Array Dispersion')
        self.sizer4_4.Add(disp1,( iy, ix),(1,1),  wx.LEFT|wx.EXPAND|wx.ADJUST_MINSIZE, 15)
        
        # Look for model parameters to which we can apply an ArrayDispersion model
        # Add a check box for each parameter.
        self.disp_cb_dict = {}
        ix+=1 
        self.noDisper_rbox = wx.RadioButton(self, -1,"None", (10, 10),style= wx.RB_GROUP)
        self.Bind(wx.EVT_RADIOBUTTON,self.select_disp_angle , id=self.noDisper_rbox.GetId())
        #MAC needs SetValue
        self.noDisper_rbox.SetValue(True)
        self.sizer4_4.Add(self.noDisper_rbox, (iy, ix),
                           (1,1), wx.EXPAND|wx.ADJUST_MINSIZE, 0)
        
        for p in self.model.dispersion.keys():
            if not p in self.model.orientation_params:
                ix+=1 
                self.disp_cb_dict[p] = wx.RadioButton(self, -1, p, (10, 10))
                self.state.disp_cb_dict[p]=  self.disp_cb_dict[p].GetValue()
                self.Bind(wx.EVT_RADIOBUTTON, self.select_disp_angle, id=self.disp_cb_dict[p].GetId())
                self.sizer4_4.Add(self.disp_cb_dict[p], (iy, ix), (1,1), wx.EXPAND|wx.ADJUST_MINSIZE, 0)
        
        for p in self.model.dispersion.keys():
            if p in self.model.orientation_params:
                ix+=1 
                self.disp_cb_dict[p] = wx.RadioButton(self, -1, p, (10, 10))
                self.state.disp_cb_dict[p]=  self.disp_cb_dict[p].GetValue()
                if not (self.enable2D or self.data.__class__.__name__ =="Data2D"):
                    self.disp_cb_dict[p].Hide()
                else:
                    self.disp_cb_dict[p].Show(True)
                self.Bind(wx.EVT_RADIOBUTTON, self.select_disp_angle, id=self.disp_cb_dict[p].GetId())
                self.sizer4_4.Add(self.disp_cb_dict[p], (iy, ix), (1,1), wx.EXPAND|wx.ADJUST_MINSIZE, 0)


        ix =0
        iy +=1 
        self.sizer4_4.Add((20,20),(iy,ix),(1,1), wx.LEFT|wx.EXPAND|wx.ADJUST_MINSIZE, 15)        
        self.Layout()

        self.state.orientation_params =[]
        self.state.orientation_params_disp =[]
        self.state.parameters =[]
        self.state.fittable_param =[]
        self.state.fixed_param =[]
        
        ## 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)
        
        
        ## post state to fit panel
        event = PageInfoEvent(page = self)
        wx.PostEvent(self.parent, event)
        
    def _set_range_sizer(self, title, box_sizer=None, object1=None,object=None):
        """
        Fill the Q range sizer
        """
        #2D data? default
        is_2Ddata = False
        
        #check if it is 2D data
        if self.data.__class__.__name__ == 'Data2D':
            is_2Ddata = True
            
        self.sizer5.Clear(True)
        #--------------------------------------------------------------
        if box_sizer == None:
            box_description= wx.StaticBox(self, -1,str(title))
            boxsizer1 = wx.StaticBoxSizer(box_description, wx.VERTICAL)
        else:
            #for MAC
            boxsizer1 = box_sizer

        self.qmin    = self.ModelTextCtrl(self, -1,size=(_BOX_WIDTH,20),style=wx.TE_PROCESS_ENTER,
                                            text_enter_callback = self._onparamEnter)
        self.qmin.SetValue(str(self.qmin_x))
        self.qmin.SetToolTipString("Minimun value of Q in linear scale.")
     
        self.qmax    = self.ModelTextCtrl(self, -1,size=(_BOX_WIDTH,20),style=wx.TE_PROCESS_ENTER,
                                            text_enter_callback = self._onparamEnter)
        self.qmax.SetValue(str(self.qmax_x))
        self.qmax.SetToolTipString("Maximum value of Q in linear scale.")
        
        id = wx.NewId()
        self.reset_qrange =wx.Button(self,id,'Reset',size=(77,20))
      
        self.reset_qrange.Bind(wx.EVT_BUTTON, self.on_reset_clicked,id=id)
        self.reset_qrange.SetToolTipString("Reset Q range to the default values")
     
        sizer_horizontal=wx.BoxSizer(wx.HORIZONTAL)
        sizer= wx.GridSizer(2, 4,2, 6)

        self.btEditMask = wx.Button(self,wx.NewId(),'Editor', size=(88,23))
        self.btEditMask.Bind(wx.EVT_BUTTON, self._onMask,id= self.btEditMask.GetId())
        self.btEditMask.SetToolTipString("Edit Mask.")
        self.EditMask_title = wx.StaticText(self, -1, ' Masking(2D)')

        sizer.Add(wx.StaticText(self, -1, '    Q range'))     
        sizer.Add(wx.StaticText(self, -1, ' Min[1/A]'))
        sizer.Add(wx.StaticText(self, -1, ' Max[1/A]'))
        sizer.Add(self.EditMask_title)
        sizer.Add(self.reset_qrange)   
        
        sizer.Add(self.qmin)
        sizer.Add(self.qmax)
        sizer.Add(self.btEditMask)
       
        if object1!=None:
            
            boxsizer1.Add(object1) 
            boxsizer1.Add((10,10))
        boxsizer1.Add(sizer)
        if object!=None:
            boxsizer1.Add((10,15))
            boxsizer1.Add(object)
        if is_2Ddata:
            self.btEditMask.Enable()  
            self.EditMask_title.Enable() 
        else:
            self.btEditMask.Disable()  
            self.EditMask_title.Disable()
        ## save state
        self.save_current_state()
        #----------------------------------------------------------------
        self.sizer5.Add(boxsizer1,0, wx.EXPAND | wx.ALL, 10)
        self.sizer5.Layout()

    
    def _fill_save_sizer(self):
        """
        Draw the layout for saving option
        """
        return
        self.sizer6.Clear(True)
        box_description= wx.StaticBox(self, -1,"Save Model")
        boxsizer1 = wx.StaticBoxSizer(box_description, wx.VERTICAL)
        sizer_save = wx.BoxSizer(wx.HORIZONTAL)
        
        self.btSave_title = wx.StaticText(self, -1, 'Save the current Model')
        self.btSave = wx.Button(self,wx.NewId(),'Save')
        self.btSave.Bind(wx.EVT_BUTTON, self.on_save_state,id= self.btSave.GetId())
        self.btSave.SetToolTipString("Save the current Model")
        
        sizer_save.Add(self.btSave_title)  
        sizer_save.Add((20,20),0, wx.LEFT|wx.RIGHT|wx.EXPAND,80)  
        sizer_save.Add(self.btSave)     
        boxsizer1.Add(sizer_save)
        self.sizer6.Add(boxsizer1,0, wx.EXPAND | wx.ALL, 10)
        self.sizer6.Layout()
        self.SetScrollbars(20,20,25,65)
        
    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 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.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.__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:
            self.qmin_x = _QMIN_DEFAULT
            self.qmax_x = _QMAX_DEFAULT
            self.num_points = _NPTS_DEFAULT            
            self.state.npts = self.num_points
            
        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 on_model_help_clicked(self,event):
        """
        on 'More details' button
        """
        from help_panel import  HelpWindow
        
        if self.model == None:
            name = 'FuncHelp'
        else:
            name = self.model.origin_name

        frame = HelpWindow(None, -1,  pageToOpen="media/model_functions.html")    
        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 ))