using a wait cursor when doing potentially slow things in the gui

pyglance/glance/gui_view.py

@@ -540,10 +540,16 @@ class GlanceGUIView (QWidget) :
         
         if (tempFilePath is not None) and (len(tempFilePath) > 0) :
             self.lastFilePath = os.path.dirname(str(tempFilePath))
-        
+
+        # turn on the wait cursor, in case this takes a long time
+        self.setCursor(Qt.WaitCursor)
+
         # let our listeners know that the user picked a file
         for listener in self.userUpdateListeners :
             listener.newFileSelected(file_prefix, tempFilePath)
+
+        # now that we're done, put the cursor back to an arrow
+        self.setCursor(Qt.ArrowCursor)
     
     def reportVariableSelected (self, file_prefix=None) :
         """
@@ -803,10 +809,16 @@ class GlanceGUIView (QWidget) :
         
         # make sure the focus isn't in a line-edit box
         self.statsButton.setFocus()
-        
+
+        # turn on the wait cursor, in case this takes a long time
+        self.setCursor(Qt.WaitCursor)
+
         # now report to our listeners that the user wants stats
         for listener in self.userUpdateListeners :
             listener.userRequestsStats()
+
+        # now that we're done, put the cursor back to an arrow
+        self.setCursor(Qt.ArrowCursor)
     
     def reportDisplayRawDataClicked (self) :
         """
@@ -815,22 +827,34 @@ class GlanceGUIView (QWidget) :
         
         # make sure the focus isn't in a line-edit box
         self.rawDataButton.setFocus()
-        
+
+        # turn on the wait cursor, in case this takes a long time
+        self.setCursor(Qt.WaitCursor)
+
         for listener in self.userUpdateListeners :
             listener.userRequestsRawData()
+
+        # now that we're done, put the cursor back to an arrow
+        self.setCursor(Qt.ArrowCursor)
     
     def reportDisplayPlotClicked (self) :
         """
-        the user clicked the display plot button
+        the user clicked the create plot button
         """
         
         # first we need to clean up focus in case it's in one of the line-edit boxes
         self.displayButton.setFocus()
-        
+
+        # turn on the wait cursor, in case this takes a long time
+        self.setCursor(Qt.WaitCursor)
+
         # now report to our listeners that the user wants a plot
         for listener in self.userUpdateListeners :
             listener.userRequestsPlot()
 
+        # now that we're done, put the cursor back to an arrow
+        self.setCursor(Qt.ArrowCursor)
+
     def reportDisplayGlobalAttrsClicked(self):
         """
         the user clicked the show global attributes button
@@ -839,9 +863,15 @@ class GlanceGUIView (QWidget) :
         # make sure the focus isn't in a line-edit box
         self.gAttrsButton.setFocus()
 
+        # turn on the wait cursor, in case this takes a long time
+        self.setCursor(Qt.WaitCursor)
+
         for listener in self.userUpdateListeners:
             listener.userRequestsGlobalAttrs()
 
+        # now that we're done, put the cursor back to an arrow
+        self.setCursor(Qt.ArrowCursor)
+
     def _extra_number_validation (self, string_that_should_be_a_number) :
         """
         try to validate the string that should be a number