Fix sizing of PlotPlugin

skimage/viewer/plugins/plotplugin.py

@@ -17,6 +17,13 @@ class PlotPlugin(Plugin):
     See base Plugin class for additional details.
     """
 
+    def __init__(self, image_filter=None, height=150, width=400, **kwargs):
+        super(PlotPlugin, self).__init__(image_filter=image_filter,
+                                         height=height, width=width, **kwargs)
+
+        self._height = height
+        self._width = width
+
     def attach(self, image_viewer):
         super(PlotPlugin, self).attach(image_viewer)
         # Add plot for displaying intensity profile.
@@ -26,10 +33,12 @@ class PlotPlugin(Plugin):
         """Redraw plot."""
         self.canvas.draw_idle()
 
-    def add_plot(self, height=4, width=4):
-        self.fig, self.ax = new_plot(figsize=(height, width))
+    def add_plot(self):
+        self.fig, self.ax = new_plot()
+        self.fig.set_figwidth(self._width / float(self.fig.dpi))
+        self.fig.set_figheight(self._height / float(self.fig.dpi))
+
         self.canvas = self.fig.canvas
-        self.canvas.setMinimumHeight(150)
         #TODO: Converted color is slightly different than Qt background.
         qpalette = QtGui.QPalette()
         qcolor = qpalette.color(QtGui.QPalette.Window)