Added accessors for ImageView PlotWidget and histogram

imageview/ImageView.py

@@ -685,4 +685,12 @@ class ImageView(QtGui.QWidget):
         
     def getImageItem(self):
         """Return the ImageItem for this ImageView."""
-        return self.imageItem
+        return self.imageItem
\ No newline at end of file
+        
+    def getRoiPlot(self):
+        """Return the ROI PlotWidget for this ImageView"""
+        return self.ui.roiPlot
+       
+    def getHistogramWidget(self):
+        """Return the HistogramLUTWidget for this ImageView"""
+        return self.ui.histogram