source: sasview/sansview/perspectives/fitting/fitting.py @ 47f01c2

import  re,copy
import sys, wx, logging
import string, numpy, math

from danse.common.plottools.plottables import Data2D,Theory1D
from sans.guiframe import dataFitting 
from danse.common.plottools.PlotPanel import PlotPanel
from sans.guicomm.events import NewPlotEvent, StatusEvent  
from sans.guicomm.events import EVT_SLICER_PANEL,ERR_DATA
from sans.guiframe import dataFitting
from sans.fit.AbstractFitEngine import Model

from fitproblem import FitProblem
from fitpanel import FitPanel
from fit_thread import FitThread
import models
import fitpage


DEFAULT_BEAM = 0.005
DEFAULT_QMIN = 0.0001
DEFAULT_QMAX = 0.13
DEFAULT_NPTS = 50
import time
import thread
from sans.fit.AbstractFitEngine import FitAbort

(PageInfoEvent, EVT_PAGE_INFO)   = wx.lib.newevent.NewEvent()
class PlotInfo:
    """
        store some plotting field
    """
    _xunit = 'A^{-1}'
    _xaxis= "\\rm{Q}"
    _yunit = "cm^{-1}"
    _yaxis= "\\rm{Intensity} "
    id = "Model"
    group_id = "Model"
    title= None
    info= None
    
    
class Plugin:
    """
        Fitting plugin is used to perform fit 
    """
    def __init__(self):
        ## Plug-in name
        self.sub_menu = "Fitting"
        
        ## Reference to the parent window
        self.parent = None
        #Provide list of models existing in the application
        self.menu_mng = models.ModelManager()
        ## List of panels for the simulation perspective (names)
        self.perspective = []
        #list of panel to send to guiframe
        self.mypanels=[]
        # reference to the current running thread
        self.calc_2D= None
        self.calc_1D= None
        self.calc_fit= None
        
        # Start with a good default
        self.elapsed = 0.022
        # the type of optimizer selected, park or scipy
        self.fitter  = None
        #Flag to let the plug-in know that it is running stand alone
        self.standalone=True
        ## dictionary of page closed and id 
        self.closed_page_dict ={}
        ## Fit engine
        self._fit_engine = 'scipy'
        #List of selected data
        self.selected_data_list=[]
        # Log startup
        logging.info("Fitting plug-in started")   
        # model 2D view
        self.model2D_id=None
        #keep reference of the simultaneous fit page
        self.sim_page=None
        #dictionary containing data name and error on dy of that data 
        self.err_dy={}
        
   
        
    def populate_menu(self, id, owner):
        """
            Create a menu for the Fitting plug-in
            @param id: id to create a menu
            @param owner: owner of menu
            @ return : list of information to populate the main menu
        """
        #Menu for fitting
        self.menu1 = wx.Menu()
        
        #Set park engine
        id3 = wx.NewId()
        scipy_help= "Scipy Engine: Perform Simple fit. More in Help window...."
        self.menu1.AppendCheckItem(id3, "Simple Fit  [Scipy]",scipy_help) 
        wx.EVT_MENU(owner, id3,  self._onset_engine_scipy)
        
        id3 = wx.NewId()
        park_help = "Park Engine: Perform Complex fit. More in Help window...."
        self.menu1.AppendCheckItem(id3, "Complex Fit  [Park]",park_help) 
        wx.EVT_MENU(owner, id3,  self._onset_engine_park)
        
        self.menu1.FindItemByPosition(0).Check(True)
        self.menu1.FindItemByPosition(1).Check(False)
            
        self.menu1.AppendSeparator()
        
        id1 = wx.NewId()
        simul_help = "Allow to edit fit engine with multiple model and data"
        self.menu1.Append(id1, '&Simultaneous Page',simul_help)
        wx.EVT_MENU(owner, id1, self.on_add_sim_page)
    
        #menu for model
        menu2 = wx.Menu()
    
        self.menu_mng.populate_menu(menu2, owner)
        id2 = wx.NewId()
        owner.Bind(models.EVT_MODEL,self._on_model_menu)
      
        self.fit_panel.set_owner(owner)
        self.fit_panel.set_model_list(self.menu_mng.get_model_list())
        owner.Bind(fitpage.EVT_MODEL_BOX,self._on_model_panel)
      
        #create  menubar items
        return [(id, self.menu1, "Fitting"),
                (id2, menu2, "Model")]
       
    
    def on_add_sim_page(self, event):
        """
            Create a page to access simultaneous fit option
        """
        if self.sim_page !=None:
            msg= "Simultaneous Fit page already opened"
            wx.PostEvent(self.parent, StatusEvent(status= msg))
            return 
        
        self.sim_page= self.fit_panel.add_sim_page()
        
        
        
    def help(self, evt):
        """
            Show a general help dialog. 
            TODO: replace the text with a nice image
        """
        from helpPanel import  HelpWindow
        frame = HelpWindow(None, -1, 'HelpWindow')    
        frame.Show(True)
        
        
    def get_context_menu(self, graph=None):
        """
            Get the context menu items available for P(r)
            @param graph: the Graph object to which we attach the context menu
            @return: a list of menu items with call-back function
        """
        #TODO: clean this up so that the string are not copied 
        #      multiple times.
        self.graph=graph
        for item in graph.plottables:
            if item.__class__.__name__ is "Data2D":
                if hasattr(item,"is_data"):
                    if item.is_data:
                        return [["Select data for fitting", \
                         "Dialog with fitting parameters ", self._onSelect]]
                    else:
                        return [] 
                return [["Select data for fitting",\
                          "Dialog with fitting parameters ", self._onSelect]] 
            else:
                if item.name==graph.selected_plottable :
                    if hasattr(item, "group_id"):
                        if hasattr(item,"is_data"):
                            if item.is_data:
                                return [["Select data for fitting", \
                                 "Dialog with fitting parameters ", self._onSelect]]
                            else:
                                return [] 
                        else:
                            return [["Select data for fitting", \
                                 "Dialog with fitting parameters ", self._onSelect]] 
        return []   


    def get_panels(self, parent):
        """
            Create and return a list of panel objects
        """
        self.parent = parent
        # Creation of the fit panel
        self.fit_panel = FitPanel(self.parent, -1)
        #Set the manager for the main panel
        self.fit_panel.set_manager(self)
        # List of windows used for the perspective
        self.perspective = []
        self.perspective.append(self.fit_panel.window_name)
        # take care of saving  data, model and page associated with each other
        self.page_finder = {}
        #index number to create random model name
        self.index_model = 0
        self.index_theory= 0
        self.parent.Bind(EVT_SLICER_PANEL, self._on_slicer_event)
        self.parent.Bind( ERR_DATA, self._on_data_error)
        
        #Send the fitting panel to guiframe
        self.mypanels.append(self.fit_panel)
        return self.mypanels

        
      
    def get_perspective(self):
        """
            Get the list of panel names for this perspective
        """
        return self.perspective
    
    
    def on_perspective(self, event):
        """
            Call back function for the perspective menu item.
            We notify the parent window that the perspective
            has changed.
        """
        self.parent.set_perspective(self.perspective)
    
    
    def post_init(self):
        """
            Post initialization call back to close the loose ends
            [Somehow openGL needs this call]
        """
        self.parent.set_perspective(self.perspective)


    def copy_data(self, item, dy=None):
        """
            receive a data 1D and the list of errors on dy
            and create a new data1D data
            @param return 
        """
        detector=None
        source=None
        info = None
        id=None
        dxl=None
        dxw=None
        dx=None
        if hasattr(item, "dxl"):
            dxl = copy.deepcopy(item.dxl)
        if hasattr(item, "dxw"):
            dxw = copy.deepcopy(item.dxw)
        if hasattr(item, "detector"):
            detector = copy.deepcopy(item.detector)
        if hasattr(item, "source"):
            source = copy.deepcopy(item.source)
        if hasattr(item ,"info"):
            info= copy.deepcopy(item.info)
        if hasattr(item,"id"):
            id = copy.deepcopy(item.id)
        if hasattr(item, "dx"):
            dx= item.dx
            
        
        data= dataFitting.Data1D(x=item.x, y=item.y,dx=dx, dy=dy, dxl=dxl, dxw=dxw)
        
        data.name = item.name
        data.detector = detector
        data.source = source
        ## allow to highlight data when plotted
        data.interactive = copy.deepcopy(item.interactive)
        ## when 2 data have the same id override the 1 st plotted
        data.id = id
        ## info is a reference to output of dataloader that can be used
        ## to save  data 1D as cansas xml file
        data.info= info
        ## If the data file does not tell us what the axes are, just assume...
        data.xaxis(copy.deepcopy(item._xaxis),copy.deepcopy(item._xunit))
        data.yaxis(copy.deepcopy(item._yaxis),copy.deepcopy(item._yunit))
        ##group_id specify on which panel to plot this data
        data.group_id = copy.deepcopy(item.group_id)
        return data

    def set_fit_range(self, page, qmin, qmax):
        """
            Set the fitting range of a given page
        """
        if page in self.page_finder.iterkeys():
            fitproblem= self.page_finder[page]
            fitproblem.set_range(qmin= qmin, qmax= qmax)
                    
    def schedule_for_fit(self,value=0,page=None,fitproblem =None):  
        """
            Set the fit problem field to 0 or 1 to schedule that problem to fit.
            Schedule the specified fitproblem or get the fit problem related to 
            the current page and set value.
            @param value : integer 0 or 1 
            @param fitproblem: fitproblem to schedule or not to fit
        """   
        if fitproblem !=None:
            fitproblem.schedule_tofit(value)
        else:
            if page in self.page_finder.iterkeys():
                fitproblem= self.page_finder[page]
                fitproblem.schedule_tofit(value)
          
                      
                    
    def get_page_finder(self):
        """ @return self.page_finder used also by simfitpage.py"""  
        return self.page_finder 
    
    
    def set_page_finder(self,modelname,names,values):
        """
             Used by simfitpage.py to reset a parameter given the string constrainst.
             @param modelname: the name ot the model for with the parameter has to reset
             @param value: can be a string in this case.
             @param names: the paramter name
             @note: expecting park used for fit.
        """  
        sim_page= self.sim_page
        for page, value in self.page_finder.iteritems():
            if page != sim_page:
                list=value.get_model()
                model = list[0]
                if model.name== modelname:
                    value.set_model_param(names,values)
                    break

   
                            
    def split_string(self,item): 
        """
            receive a word containing dot and split it. used to split parameterset
            name into model name and parameter name example:
            paramaterset (item) = M1.A
            @return model_name =M1 , parameter name =A
        """
        if string.find(item,".")!=-1:
            param_names= re.split("\.",item)
            model_name=param_names[0]
            param_name=param_names[1]  
            return model_name,param_name
        
   
    def stop_fit(self):
        """
            Stop the fit engine
        """
        if self.calc_fit!= None and self.calc_fit.isrunning():
            self.calc_fit.stop()
            wx.PostEvent(self.parent, StatusEvent(status="Fitting  \
                is cancelled" , type="stop"))
            
    
      
    def set_smearer(self,smearer, qmin=None, qmax=None):
        """
            Get a smear object and store it to a fit problem
            @param smearer: smear object to allow smearing data
        """   
        current_pg=self.fit_panel.get_current_page()
        self.page_finder[current_pg].set_smearer(smearer)
        ## draw model 1D with smeared data
        data =  self.page_finder[current_pg].get_plotted_data()
        model = self.page_finder[current_pg].get_model()
        ## if user has already selected a model to plot
        ## redraw the model with data smeared
        
        smear =self.page_finder[current_pg].get_smearer()
        self.draw_model( model=model, data= data, smearer= smear,
                qmin= qmin, qmax= qmax)

    
    
    def draw_model(self, model, data= None,smearer= None,
                   enable1D= True, enable2D= False,
                   qmin= DEFAULT_QMIN, qmax= DEFAULT_QMAX, qstep= DEFAULT_NPTS):
        """
             Draw model.
             @param model: the model to draw
             @param name: the name of the model to draw
             @param data: the data on which the model is based to be drawn
             @param description: model's description
             @param enable1D: if true enable drawing model 1D
             @param enable2D: if true enable drawing model 2D
             @param qmin:  Range's minimum value to draw model
             @param qmax:  Range's maximum value to draw model
             @param qstep: number of step to divide the x and y-axis
             
        """
        ## draw model 1D with no loaded data
        self._draw_model1D( model= model, data= data,enable1D=enable1D, smearer= smearer,
                           qmin= qmin, qmax= qmax, qstep= qstep )
        ## draw model 2D with no initial data
        self._draw_model2D(model=model,
                           data = data,
                           enable2D= enable2D,
                           qmin=qmin,
                           qmax=qmax,
                           qstep=qstep)
        
  
                        
    def onFit(self):
        """
            perform fit 
        """
        ##  count the number of fitproblem schedule to fit 
        fitproblem_count= 0
        for value in self.page_finder.itervalues():
            if value.get_scheduled()==1:
                fitproblem_count += 1
                
        ## if simultaneous fit change automatically the engine to park
        if fitproblem_count >1:
            self._on_change_engine(engine='park')
            
        from sans.fit.Fitting import Fit
        self.fitter= Fit(self._fit_engine)
        
        if self._fit_engine=="park":
            engineType="Simultaneous Fit"
        else:
            engineType="Single Fit"
            
        fproblemId = 0
        current_pg=None
        for page, value in self.page_finder.iteritems():
            try:
                if value.get_scheduled()==1:
                    #Get list of parameters name to fit
                    pars = []
                    templist = []
                    templist = page.get_param_list()
                    for element in templist:
                        name = str(element[1])
                        pars.append(name)
                    #Set Engine  (model , data) related to the page on 
                    self._fit_helper( current_pg=page, value=value,pars=pars,
                                      id=fproblemId, title= engineType ) 
                    fproblemId += 1 
                    current_pg= page
            except:
                msg= "%s error: %s" % (engineType,sys.exc_value)
                wx.PostEvent(self.parent, StatusEvent(status= msg ))
                return 
        #Do the simultaneous fit
        try:
            ## If a thread is already started, stop it
            if self.calc_fit!= None and self.calc_fit.isrunning():
                self.calc_fit.stop()
            
            wx.PostEvent(self.parent, StatusEvent(status="Start the computation",
                                        curr_thread=self.calc_fit,type="start"))
            wx.PostEvent(self.parent, StatusEvent(status="Computing...",
                                        curr_thread=self.calc_fit,type="progress"))
            ## perform single fit
            if self._fit_engine=="scipy":
                qmin, qmax= current_pg.get_range()
                self.calc_fit=FitThread(parent =self.parent,
                                        fn= self.fitter,
                                       cpage=current_pg,
                                       pars= pars,
                                       completefn= self._single_fit_completed,
                                       updatefn=self._updateFit)
                      
            else:
                ## Perform more than 1 fit at the time
                self.calc_fit=FitThread(parent =self.parent,
                                        fn= self.fitter,
                                       completefn= self._simul_fit_completed,
                                       updatefn=self._updateFit)
            self.calc_fit.queue()
            self.calc_fit.ready(2.5)
        
        except FitAbort:
            print "in pluging"
        except:
            msg= "%s error: %s" % (engineType,sys.exc_value)
            wx.PostEvent(self.parent, StatusEvent(status= msg ,type="stop"))
            return 
              
              
    def _add_page_onmenu(self, name,fitproblem=None):
        """
            Add name of a closed page of fitpanel in a menu 
        """
        list = self.menu1.GetMenuItems()
        for item in list:
            if name == item.GetItemLabel():
                self.closed_page_dict[name][1] = fitproblem
                
        if not name in self.closed_page_dict.keys():    
            # Post paramters
            event_id = wx.NewId()
            self.menu1.Append(event_id, name, "Show %s fit panel" % name)
            self.closed_page_dict[name]= [event_id, fitproblem]
            wx.EVT_MENU(self.parent,event_id,  self._open_closed_page)
        
        
    def _open_closed_page(self, event):    
        """
            reopen a closed page
        """
        for name, value in self.closed_page_dict.iteritems():
            if event.GetId() in value:
                id,fitproblem = value
                if name !="Model":
                    data= fitproblem.get_fit_data()
                    page = self.fit_panel.add_fit_page(data= data,reset=True)
                    if fitproblem != None:
                        self.page_finder[page]=fitproblem
                        if self.sim_page != None:
                            self.sim_page.draw_page()
                            
                else:
                    model = fitproblem
                    self.fit_panel.add_model_page(model=model, topmenu=True,
                                                  reset= True)
                    break
        
        
    def _reset_schedule_problem(self, value=0):
        """
             unschedule or schedule all fitproblem to be fit
        """
        for page, fitproblem in self.page_finder.iteritems():
            fitproblem.schedule_tofit(value)
            
    def _fit_helper(self,current_pg,pars,value, id, title="Single Fit " ):
        """
            helper for fitting
        """
        metadata = value.get_fit_data()
        model = value.get_model()
        smearer = value.get_smearer()
        qmin , qmax = value.get_range()
        self.fit_id =id
        #Create list of parameters for fitting used
        templist=[]
        pars=pars
        try:
            ## create a park model and reset parameter value if constraint
            ## is given
            new_model = Model(model)
            param = value.get_model_param()
            if len(param)>0:
                for item in param:
                    param_value = item[1]
                    param_name = item[0]
                    ## check if constraint
                    if param_value !=None and param_name != None:
                        new_model.parameterset[ param_name].set( param_value )
            
            #Do the single fit
            self.fitter.set_model(new_model, self.fit_id, pars)
            
            self.fitter.set_data(data=metadata,Uid=self.fit_id,
                                 smearer=smearer,qmin= qmin,qmax=qmax )
           
            self.fitter.select_problem_for_fit(Uid= self.fit_id,
                                               value= value.get_scheduled())
            value.clear_model_param()
        except:
            msg= title +" error: %s" % sys.exc_value
            wx.PostEvent(self.parent, StatusEvent(status= msg, type="stop"))
            return
       
    def _onSelect(self,event):
        """ 
            when Select data to fit a new page is created .Its reference is 
            added to self.page_finder
        """
        self.panel = event.GetEventObject()
        for plottable in self.panel.graph.plottables:
            if plottable.name == self.panel.graph.selected_plottable:
                #if not hasattr(plottable, "is_data"):
                    
                if  plottable.__class__.__name__=="Theory1D":
                    dy=numpy.zeros(len(plottable.y))
                    if hasattr(plottable, "dy"):
                        dy= copy.deepcopy(plottable.dy)
                        
                    item= self.copy_data(plottable, dy)
                    item.group_id += "data1D"
                    item.id +="data1D"
                    item.is_data= False
                    title = item.name
                    wx.PostEvent(self.parent, NewPlotEvent(plot=item, title=str(title)))
                else:
                    item= self.copy_data(plottable, plottable.dy)  
                    item.is_data=True
                    
                ## put the errors values back to the model if the errors were hiden
                ## before sending them to the fit engine
                if len(self.err_dy)>0:
                    if item.name in  self.err_dy.iterkeys():
                        dy= self.err_dy[item.name]
                        data= self.copy_data(item, dy)
                        data.is_data= item.is_data
                    else:
                        data= self.copy_data(item, item.dy)
                        data.is_data= item.is_data
                        
                       
                else:
                    if item.dy==None:
                        dy= numpy.zeros(len(item.y))
                        data= self.copy_data(item, dy)
                        data.is_data=item.is_data
                    else:
                        data= self.copy_data(item,item.dy)
                        data.is_data=item.is_data
                       
            else:
                if plottable.__class__.__name__ !="Data2D":
                    return
                ## Data2D case
                if not hasattr(plottable, "is_data"):
                    item= copy.deepcopy(plottable)
                    item.group_id += "data2D"
                    item.id +="data2D"
                    item.is_data= False
                    title = item.name
                    title += " Fit"
                    data = item
                    wx.PostEvent(self.parent, NewPlotEvent(plot=item, title=str(title)))
                else:
                    item= copy.deepcopy(plottable )
                    data= copy.deepcopy(plottable )
                    item.is_data=True
                    data.is_data=True
                
            ## create anew page                   
            if item.name == self.panel.graph.selected_plottable or\
                 item.__class__.__name__ is "Data2D":
                try:
                    page = self.fit_panel.add_fit_page(data)
                    # add data associated to the page created
                    if page !=None:   
                        #create a fitproblem storing all link to data,model,page creation
                        if not page in self.page_finder.keys():
                            self.page_finder[page]= FitProblem()
                        ## item is almost the same as data but contains
                        ## axis info for plotting 
                        self.page_finder[page].add_plotted_data(item)
                        self.page_finder[page].add_fit_data(data)

                        wx.PostEvent(self.parent, StatusEvent(status="Page Created"))
                    else:
                        wx.PostEvent(self.parent, StatusEvent(status="Page was already Created"))
                except:
                    wx.PostEvent(self.parent, StatusEvent(status="Creating Fit page: %s"\
                    %sys.exc_value))
                    return
                
                
    def _updateFit(self):
        """
            Is called when values of result are available
        """
        ##Sending a progess message to the status bar
        wx.PostEvent(self.parent, StatusEvent(status="Computing..."))
            
    def _single_fit_completed(self,result,pars,cpage, elapsed=None):
        """
            Display fit result on one page of the notebook.
            @param result: result of fit 
            @param pars: list of names of parameters fitted
            @param current_pg: the page where information will be displayed
            @param qmin: the minimum value of x to replot the model 
            @param qmax: the maximum value of x to replot model
          
        """
        wx.PostEvent(self.parent, StatusEvent(status="Single fit \
        complete! " ))
      
        try:
            if result ==None:
                msg= "Simple Fitting Stop !!!"
                wx.PostEvent(self.parent, StatusEvent(status=msg,type="stop"))
                return
            if numpy.any(result.pvec ==None )or not numpy.all(numpy.isfinite(result.pvec) ):
                msg= "Single Fitting did not converge!!!"
                wx.PostEvent(self.parent, StatusEvent(status=msg,type="stop"))
                return
            for page, value in self.page_finder.iteritems():
                if page==cpage :
                    model= value.get_model()
                    break
            i = 0
            for name in pars:
                if result.pvec.__class__==numpy.float64:
                    model.setParam(name,result.pvec)
                else:
                    model.setParam(name,result.pvec[i])
                    i += 1
            ## Reset values of the current page to fit result
            cpage.onsetValues(result.fitness, result.pvec,result.stderr)
            ## plot the current model with new param
            metadata =  self.page_finder[cpage].get_fit_data()
            model = self.page_finder[cpage].get_model()
            qmin, qmax= self.page_finder[cpage].get_range()
            smearer =self.page_finder[cpage].get_smearer()
            #Replot models
            msg= "Single Fit completed. plotting... %s:"%model.name
            wx.PostEvent(self.parent, StatusEvent(status="%s " % msg))
            self.draw_model( model=model, data= metadata, smearer= smearer,
                             qmin= qmin, qmax= qmax)
            wx.PostEvent(self.parent, StatusEvent(status=" " , type="stop")) 
        except:
            msg= "Single Fit completed but Following error occurred:%s"% sys.exc_value
            wx.PostEvent(self.parent, StatusEvent(status=msg,type="stop"))
            return
       
       
    def _simul_fit_completed(self,result,pars=None,cpage=None, elapsed=None):
        """
            Parameter estimation completed, 
            display the results to the user
            @param alpha: estimated best alpha
            @param elapsed: computation time
        """
        wx.PostEvent(self.parent, StatusEvent(status="Simultaneous fit \
        complete "))
       
        ## fit more than 1 model at the same time 
        try:
            if result ==None:
                msg= "Complex Fitting Stop !!!"
                wx.PostEvent(self.parent, StatusEvent(status=msg,type="stop"))
                return
            if numpy.any(result.pvec ==None )or not numpy.all(numpy.isfinite(result.pvec) ):
                msg= "Single Fitting did not converge!!!"
                wx.PostEvent(self.parent, StatusEvent(status=msg,type="stop"))
                return
            for page, value in self.page_finder.iteritems():
                if value.get_scheduled()==1:
                    model = value.get_model()
                    metadata =  value.get_plotted_data()
                    small_out = []
                    small_cov = []
                    i = 0
                    #Separate result in to data corresponding to each page
                    for p in result.parameters:
                        model_name,param_name = self.split_string(p.name)  
                        if model.name == model_name:
                            p_name= model.name+"."+param_name
                            if p.name == p_name:
                                small_out.append(p.value )
                                model.setParam(param_name,p.value) 
                              
                                small_cov.append(p.stderr)
                            else:
                                value= model.getParam(param_name)
                                small_out.append(value )
                                small_cov.append(None)
                    # Display result on each page 
                    page.onsetValues(result.fitness, small_out,small_cov)
                    #Replot models
                    msg= "Simultaneous Fit completed. plotting... %s:"%model.name
                    wx.PostEvent(self.parent, StatusEvent(status="%s " % msg))
                    qmin, qmax= page.get_range()
                    smearer =self.page_finder[page].get_smearer()
                    self.draw_model( model=model, data= metadata, smearer=smearer,
                                     qmin= qmin, qmax= qmax)
            wx.PostEvent(self.parent, StatusEvent(status="", type="stop"))
        except:
             msg= "Simultaneous Fit completed"
             msg +=" but Following error occurred:%s"%sys.exc_value
             wx.PostEvent(self.parent, StatusEvent(status=msg,type="stop"))
             return 
             
                           
        
    def _on_show_panel(self, event):
        print "_on_show_panel: fitting"
      
      
    def _onset_engine_park(self,event):
        """ 
            set engine to park
        """
        self._on_change_engine('park')
       
       
    def _onset_engine_scipy(self,event):
        """ 
            set engine to scipy
        """
        self._on_change_engine('scipy')
       
    def _on_slicer_event(self, event):
        """
            Receive a panel as event and send it to guiframe 
            @param event: event containing a panel
        """
        if event.panel!=None:
            new_panel = event.panel
            # Set group ID if available
            event_id = self.parent.popup_panel(new_panel)
            #self.menu3.Append(event_id, new_panel.window_caption, 
            #                 "Show %s plot panel" % new_panel.window_caption)
            # Set UID to allow us to reference the panel later
            new_panel.uid = event_id
            self.mypanels.append(new_panel) 
        return  
    
      
    def _return_engine_type(self):
        """
            return the current type of engine
        """
        return self._fit_engine
     
     
    def _on_change_engine(self, engine='park'):
        """
            Allow to select the type of engine to perform fit 
            @param engine: the key work of the engine
        """
        ## saving fit engine name
        self._fit_engine = engine
        ## change menu item state
        if engine=="park":
            self.menu1.FindItemByPosition(0).Check(False)
            self.menu1.FindItemByPosition(1).Check(True)
        else:
            self.menu1.FindItemByPosition(0).Check(True)
            self.menu1.FindItemByPosition(1).Check(False)
            
        ## post a message to status bar
        wx.PostEvent(self.parent, StatusEvent(status="Engine set to: %s" % self._fit_engine))
   
        ## Bind every open fit page with a newevent to know the current fitting engine
        import fitpage
        event= fitpage.FitterTypeEvent()
        event.type = self._fit_engine
        for key in self.page_finder.keys():
            wx.PostEvent(key, event)
       
   
    def _on_model_panel(self, evt):
        """
            react to model selection on any combo box or model menu.plot the model  
            @param evt: wx.combobox event
        """
        model = evt.model
        
        if model ==None:
            return
       
        current_pg = self.fit_panel.get_current_page() 
        ## make sure nothing is done on self.sim_page
        ## example trying to call set_panel on self.sim_page
        if current_pg != self.sim_page :
           
            if self.page_finder[current_pg].get_model()== None :
                
                model.name="M"+str(self.index_model)
                self.index_model += 1  
            else:
                model.name= self.page_finder[current_pg].get_model().name
                
            metadata = self.page_finder[current_pg].get_plotted_data()
            
            # save the name containing the data name with the appropriate model
            self.page_finder[current_pg].set_model(model)
            qmin, qmax= current_pg.get_range()
            self.page_finder[current_pg].set_range(qmin=qmin, qmax=qmax)
            smearer=  self.page_finder[current_pg].get_smearer()
            # save model name
            self.draw_model( model=model,smearer=smearer, 
                             data= metadata, qmin=qmin, qmax=qmax)
            
            if self.sim_page!=None:
                self.sim_page.draw_page()
        
        
  
    def _on_model_menu(self, evt):
        """
            Plot a theory from a model selected from the menu
            @param evt: wx.menu event
        """
        model = evt.model
     
        # Create a model page. If a new page is created, the model
        # will be plotted automatically. If a page already exists,
        # the content will be updated and the plot refreshed
        self.fit_panel.add_model_page(model,topmenu=True)
    
   
    
    
    def _update1D(self,x, output):
        """
            Update the output of plotting model 1D
        """
        wx.PostEvent(self.parent, StatusEvent(status="Plot \
        #updating ... ",type="update"))
        self.calc_thread.ready(0.01)
    
    def _fill_default_model2D(self, theory, qmax,qstep, qmin=None):
        """
            fill Data2D with default value 
            @param theory: Data2D to fill
        """
        from DataLoader.data_info import Detector, Source
        
        detector = Detector()
        theory.detector.append(detector) 
            
        theory.detector[0].distance=1e+32
        theory.source= Source()
        theory.source.wavelength=2*math.pi/1e+32
      
        ## Create detector for Model 2D
        xmax=2*theory.detector[0].distance*math.atan(\
                            qmax/(4*math.pi/theory.source.wavelength))
        
        theory.detector[0].pixel_size.x= xmax/(qstep/2-0.5)
        theory.detector[0].pixel_size.y= xmax/(qstep/2-0.5)
        theory.detector[0].beam_center.x= qmax
        theory.detector[0].beam_center.y= qmax
        ## create x_bins and y_bins of the model 2D
        distance   = theory.detector[0].distance
        pixel      = qstep/2-1
        theta      = pixel / distance / qstep#100.0
        wavelength = theory.source.wavelength
        pixel_width_x = theory.detector[0].pixel_size.x
        pixel_width_y = theory.detector[0].pixel_size.y
        center_x      = theory.detector[0].beam_center.x/pixel_width_x
        center_y      = theory.detector[0].beam_center.y/pixel_width_y
        
        
        size_x, size_y= numpy.shape(theory.data)
        for i_x in range(size_x):
            theta = (i_x-center_x)*pixel_width_x / distance 
            qx = 4.0*math.pi/wavelength * math.tan(theta/2.0)
            theory.x_bins.append(qx)    
        for i_y in range(size_y):
            theta = (i_y-center_y)*pixel_width_y / distance 
            qy =4.0*math.pi/wavelength * math.tan(theta/2.0)
            theory.y_bins.append(qy)
           
        theory.group_id ="Model"
        theory.id ="Model"
        ## determine plot boundaries
        theory.xmin= -qmax
        theory.xmax= qmax
        theory.ymin= -qmax
        theory.ymax= qmax
        
        
    def _get_plotting_info(self, data=None):
        """
            get plotting info from data if data !=None
            else use some default
        """
        my_info = PlotInfo()
        if data !=None:
            if hasattr(data,"info"):
                x_name, x_units = data.get_xaxis() 
                y_name, y_units = data.get_yaxis() 
                
                my_info._xunit = x_units
                my_info._xaxis = x_name
                my_info._yunit = y_units
                my_info._yaxis = y_name
                
            my_info.title= data.name
            if hasattr(data, "info"):
                my_info.info= data.info
            if hasattr(data, "group_id"):
                my_info.group_id= data.group_id
        
        return my_info
                
    def _complete1D(self, x,y, elapsed,model,data=None):
        """
            Complete plotting 1D data
        """ 
       
        try:
            
            new_plot = Theory1D(x=x, y=y)
            my_info = self._get_plotting_info( data)
            new_plot.name = model.name
            new_plot.id = my_info.id
            new_plot.group_id = my_info.group_id
            
            new_plot.xaxis( my_info._xaxis,  my_info._xunit)
            new_plot.yaxis( my_info._yaxis, my_info._yunit)
            if data!=None:
                if new_plot.id == data.id:
                    new_plot.id += "Model"
                new_plot.is_data =False 
           
            from DataLoader import data_info
            info= data_info.Data1D(x= new_plot.x, y=new_plot.y)
            info.title= new_plot.name
            title= my_info.title
            info.xaxis(new_plot._xaxis,  new_plot._xunit)
            info.yaxis( new_plot._yaxis, new_plot._yunit)
            new_plot.info = info
            # Pass the reset flag to let the plotting event handler
            # know that we are replacing the whole plot
            if title== None:
                title = "Analytical model 1D "
                wx.PostEvent(self.parent, NewPlotEvent(plot=new_plot,
                             title= str(title), reset=True ))
            else:
                wx.PostEvent(self.parent, NewPlotEvent(plot=new_plot,
                             title= str(title)))
            msg = "Plot 1D  complete !"
            wx.PostEvent( self.parent, StatusEvent( status= msg , type="stop" ))
        except:
            msg= " Error occurred when drawing %s Model 1D: "%new_plot.name
            msg+= " %s"%sys.exc_value
            wx.PostEvent( self.parent, StatusEvent(status= msg, type="stop"  ))
            return  
        
                 
    
        
    def _update2D(self, output,time=None):
        """
            Update the output of plotting model
        """
        wx.PostEvent(self.parent, StatusEvent(status="Plot \
        #updating ... ",type="update"))
        self.calc_thread.ready(0.01)
        
        
    def _complete2D(self, image,data, model,  elapsed,qmin, qmax,qstep=DEFAULT_NPTS):
        """
            Complete get the result of modelthread and create model 2D
            that can be plot.
        """
      
    
        err_image = numpy.zeros(numpy.shape(image))
       
        theory= Data2D(image= image , err_image= err_image)
        theory.name= model.name
        
        if data ==None:
            self._fill_default_model2D(theory= theory, qmax=qmax,qstep=qstep, qmin= qmin)
        
        else:
            theory.id= data.id+"Model"
            theory.group_id= data.name+"Model"
            theory.x_bins= data.x_bins
            theory.y_bins= data.y_bins
            theory.detector= data.detector
            theory.source= data.source
            theory.is_data =False 
            ## plot boundaries
            theory.ymin= data.ymin
            theory.ymax= data.ymax
            theory.xmin= data.xmin
            theory.xmax= data.xmax
      
       
        ## plot
        wx.PostEvent(self.parent, NewPlotEvent(plot=theory,
                         title="Analytical model 2D ", reset=True ))
        msg = "Plot 2D complete !"
        wx.PostEvent( self.parent, StatusEvent( status= msg , type="stop" ))
         
    def _on_data_error(self, event):
        """
            receives and event from plotting plu-gins to store the data name and 
            their errors of y coordinates for 1Data hide and show error
        """
        self.err_dy= event.err_dy
         
    def _draw_model2D(self,model,data=None,description=None, enable2D=False,
                      qmin=DEFAULT_QMIN, qmax=DEFAULT_QMAX, qstep=DEFAULT_NPTS):
        """
            draw model in 2D
            @param model: instance of the model to draw
            @param description: the description of the model
            @param enable2D: when True allows to draw model 2D
            @param qmin: the minimum value to  draw model 2D
            @param qmax: the maximum value to draw model 2D
            @param qstep: the number of division of Qx and Qy of the model to draw
            
        """
        
        x=  numpy.linspace(start= -1*qmax,
                               stop= qmax,
                               num= qstep,
                               endpoint=True )  
        y = numpy.linspace(start= -1*qmax,
                               stop= qmax,
                               num= qstep,
                               endpoint=True )
        ## use data info instead
        if data !=None:
            ## check if data2D to plot
            if hasattr(data, "x_bins"):
                enable2D = True
                x= data.x_bins
                y= data.y_bins
            
        if not enable2D:
            return
        try:
            from model_thread import Calc2D
            ## If a thread is already started, stop it
            if self.calc_2D != None and self.calc_2D.isrunning():
                self.calc_2D.stop()
            self.calc_2D = Calc2D(  x= x,
                                    y= y,
                                    model= model, 
                                    data = data,
                                    qmin= qmin,
                                    qmax= qmax,
                                    qstep= qstep,
                                    completefn= self._complete2D,
                                    updatefn= self._update2D )
            self.calc_2D.queue()
            
        except:
            msg= " Error occurred when drawing %s Model 2D: "%model.name
            msg+= " %s"%sys.exc_value
            wx.PostEvent( self.parent, StatusEvent(status= msg ))
            return  
   
    def _draw_model1D(self, model, data=None, smearer= None,
                qmin=DEFAULT_QMIN, qmax=DEFAULT_QMAX, qstep= DEFAULT_NPTS,enable1D= True):
        """
            Draw model 1D from loaded data1D
            @param data: loaded data
            @param model: the model to plot
        """
         
        x=  numpy.linspace(start= qmin,
                           stop= qmax,
                           num= qstep,
                           endpoint=True
                           )
        if data!=None:
            ## check for data2D
            if hasattr(data,"x_bins"):
                return
            x = data.x
            if qmin == DEFAULT_QMIN :
                qmin = min(data.x)
            if qmax == DEFAULT_QMAX:
                qmax = max(data.x) 
           
        
        if not enable1D:
            return
    
        try:
            from model_thread import Calc1D
            ## If a thread is already started, stop it
            if self.calc_1D!= None and self.calc_1D.isrunning():
                self.calc_1D.stop()
            self.calc_1D= Calc1D( x= x,
                                  data = data,
                                  model= model, 
                                  qmin = qmin,
                                  qmax = qmax,
                                  smearer = smearer,
                                  completefn = self._complete1D,
                                  updatefn = self._update1D  )
            self.calc_1D.queue()
            
        except:
            msg= " Error occurred when drawing %s Model 1D: "%model.name
            msg+= " %s"%sys.exc_value
            wx.PostEvent( self.parent, StatusEvent(status= msg ))
            return  
            
   


   
if __name__ == "__main__":
    i = Plugin()