Added default implementation of set_current_selection in Plot, so that plots can safely

ignore selections without adding any code to the plot.

Rectangle select mode, lasso select mode and freeze are now grayed out in ImagePlot.

fluents/plots.py

@@ -476,6 +476,14 @@ class Plot (View):
             pass
         
         return ids
+
+    def set_current_selection(self, selection):
+        """Called whenever the plot should change the selection.
+
+        This method is a dummy method, so that specialized plots that have 
+        no implemented selection can ignore selections alltogether.
+        """
+        pass
     
 class LineViewPlot(Plot):
     """Line view plot with percentiles.
@@ -802,18 +810,25 @@ class ImagePlot(Plot):
         self.ax.set_xticks([])
         self.ax.set_yticks([])
         self.ax.grid(False)
+
         # FIXME: ax shouldn't be in kw at all
         if kw.has_key('ax'):
             kw.pop('ax')
 
         # Initial draw
-#        xim = AxesImage(dataset.asarray(), self.ax)
         self.ax.imshow(dataset.asarray(), interpolation='nearest', aspect='auto')
 
         # Add canvas and show
         self.add(self.canvas)
         self.canvas.show()
 
+        # Disable selection modes
+        btn = self._toolbar.get_button('select')
+        btn.set_sensitive(False)
+        btn = self._toolbar.get_button('lassoselect')
+        btn.set_sensitive(False)
+        self._toolbar.freeze_button.set_sensitive(False)
+
     def get_toolbar(self):
         return self._toolbar
         
@@ -1285,6 +1300,7 @@ class PlotToolbar(gtk.Toolbar):
         btn.set_icon_widget(image)
         btn.connect('toggled', self._on_freeze_toggle)
         self.insert(btn, -1)
+        self.freeze_button = btn
 
         self.show_all()