source: sasview/guiframe/local_perspectives/plotting/plotting.py @ 04349fe

"""
This software was developed by the University of Tennessee as part of the
Distributed Data Analysis of Neutron Scattering Experiments (DANSE)
project funded by the US National Science Foundation. 

See the license text in license.txt

copyright 2008, University of Tennessee
"""


import wx
import sys
from sans.guicomm.events import EVT_NEW_PLOT
from sans.guicomm.events import StatusEvent 


class Plugin:
    """
        Plug-in class to be instantiated by the GUI manager
    """
    
    def __init__(self):
        """
            Initialize the plug-in
        """
        ## Plug-in name
        self.sub_menu = "Plotting"
        
        ## Reference to the parent window
        self.parent = None
        
        ## List of panels for the simulation perspective (names)
        self.perspective = []
        
        ## Plot panels
        self.plot_panels = []
       
    def populate_menu(self, id, parent):
        """
            Create a 'Plot' menu to list the panels
            available for displaying
            @param id: next available unique ID for wx events
            @param parent: parent window
        """
        self.menu = wx.Menu()
        
        self.menu.Append(wx.NewId(), "No plot available", 
                             "No plot available")
        self.menu.FindItemByPosition(0).Enable(False)
        return [(id, self.menu, "Plot")]
    
        
    def get_panels(self, parent):
        """
            Create and return a list of panel objects
        """
        ## Save a reference to the parent
        self.parent = parent
        # Connect to plotting events
        self.parent.Bind(EVT_NEW_PLOT, self._on_plot_event)
        # We have no initial panels for this plug-in
        
        return []
   
    
    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.
            @param event: menu event
        """
        self.parent.set_perspective(self.perspective)
    
    def post_init(self):
        """
            Post initialization call back to close the loose ends
            [Somehow openGL needs this call]
        """
        pass
    
    
    def _on_show_panel(self, event):
        """show plug-in panel"""
        pass
    
    
    def _on_plot_event(self, event):
        """
            A new plottable is being shipped to the plotting plug-in.
            Check whether we have a panel to put in on, or create
            a new one
            @param event: EVT_NEW_PLOT event
        """
        # Check whether we already have a graph with the same units
        # as the plottable we just received. 
        
        is_available = False
        for panel in self.plot_panels:
            if event.plot._xunit == panel.graph.prop["xunit_base"] \
            and event.plot._yunit == panel.graph.prop["yunit_base"]:
                if hasattr(event.plot, "group_id"):
                    ## if same group_id used the same panel to plot
                    if not event.plot.group_id==None \
                        and event.plot.group_id==panel.group_id:
                        is_available = True
                        
                        panel._onEVT_1DREPLOT(event)
                        self.parent.show_panel(panel.uid)   
                else:
                    # Check that the plot panel has no group ID
                    ## Use a panel with group_id ==None to plot
                    
                    if panel.group_id==None:
                        is_available = True
                        panel._onEVT_1DREPLOT(event)
                        self.parent.show_panel(panel.uid)
        
        # Create a new plot panel if none was available        
        if not is_available:
            #print"event.plot",hasattr(event.plot,'data')
            if not hasattr(event.plot,'data'):
                from Plotter1D import ModelPanel1D
                ## get the data representation label of the data to plot
                ## when even the user select "change scale"
                if hasattr(event.plot,"xtransform"):
                    xtransform = event.plot.xtransform
                else:
                    xtransform =None
                    
                if hasattr(event.plot,"ytransform"):
                    ytransform=  event.plot.ytransform
                else:
                    ytransform=None
                ## create a plotpanel for 1D Data
                new_panel = ModelPanel1D(self.parent, -1,xtransform=xtransform,
                                         ytransform=ytransform, style=wx.RAISED_BORDER)

            else:
                ##Create a new plotpanel for 2D data
                from Plotter2D import ModelPanel2D
                new_panel = ModelPanel2D(self.parent, id = -1, data2d=event.plot,style=wx.RAISED_BORDER)
            
            ## Set group ID if available
            ## Assign data properties to the new create panel
            group_id_str = ''
            if hasattr(event.plot, "group_id"):
                if not event.plot.group_id==None:
                    new_panel.group_id = event.plot.group_id
                    group_id_str = ' [%s]' % event.plot.group_id
            
            if hasattr(event, "title"):
                new_panel.window_caption = event.title
                new_panel.window_name = event.title
               
            event_id = self.parent.popup_panel(new_panel)
            #remove the default item in the menu
            if len(self.plot_panels) == 0:
                self.menu.RemoveItem(self.menu.FindItemByPosition(0))
                
            self.menu.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
            # Ship the plottable to its panel
            new_panel._onEVT_1DREPLOT(event)
            self.plot_panels.append(new_panel)        
            
        return