--- a/GraphicViewer.py	Sat Jul 07 20:50:24 2012 +0200
+++ b/GraphicViewer.py	Sun Jul 08 17:48:38 2012 +0200
@@ -245,7 +245,7 @@
             self.CanvasRange.SetStringSelection(TIME_RANGE_VALUES[0][0])
             self.CurrentRange = TIME_RANGE_VALUES[0][1] / self.Ticktime
         
-    def RefreshView(self, force=True):
+    def RefreshView(self, force=False):
         self.Freeze()
         if force or not self.Fixed or (len(self.Datas) > 0 and self.StartTick + self.CurrentRange > self.Datas[-1][0]):
             if (self.MinValue is not None and 
@@ -255,7 +255,7 @@
             else:
                 Yrange = 2. / self.CurrentZoom
             
-            if not self.Fixed and len(self.Datas) > 0:
+            if not force and not self.Fixed and len(self.Datas) > 0:
                 self.YCenter = max(self.Datas[-1][1] - Yrange / 2, 
                                min(self.YCenter, 
                                    self.Datas[-1][1] + Yrange / 2))
@@ -268,7 +268,7 @@
             self.GraphicsObject = plot.PlotGraphics([self.VariableGraphic], _("%s Graphics") % var_name, _("Tick"), _("Values"))
             self.Canvas.Draw(self.GraphicsObject, 
                              xAxis=(self.StartTick, self.StartTick + self.CurrentRange),
-                             yAxis=(self.YCenter - Yrange * 1.1 / 2, self.YCenter + Yrange * 1.1 / 2))
+                             yAxis=(self.YCenter - Yrange * 1.1 / 2., self.YCenter + Yrange * 1.1 / 2.))
         
             # Reset and draw cursor 
             self.ResetLastCursor()
@@ -321,7 +321,7 @@
                 self.StartTick = min(self.StartTick, self.Datas[-1][0] - self.CurrentRange)
             else:
                 self.StartTick = max(self.Datas[0][0], self.Datas[-1][0] - self.CurrentRange)
-        self.NewDataAvailable(True)
+        self.RefreshView(True)
 
     def OnRangeChanged(self, event):
         try:
@@ -336,7 +336,7 @@
     
     def OnZoomChanged(self, event):
         self.CurrentZoom = ZOOM_VALUES[self.CanvasZoom.GetSelection()][1]
-        wx.CallAfter(self.NewDataAvailable, True)
+        wx.CallAfter(self.RefreshView, True)
         event.Skip()
     
     def OnPositionChanging(self, event):
@@ -422,11 +422,11 @@
                     wx.CallAfter(self.RefreshRange)
             else:
                 current = self.CanvasZoom.GetSelection()
-                new = max(0, min(current - rotation, len(ZOOM_VALUES) - 1))
+                new = max(0, min(current + rotation, len(ZOOM_VALUES) - 1))
                 if new != current:
                     self.CurrentZoom = ZOOM_VALUES[new][1]
                     self.CanvasZoom.SetStringSelection(ZOOM_VALUES[new][0])
-                    wx.CallAfter(self.NewDataAvailable, True)
+                    wx.CallAfter(self.RefreshView, True)
         event.Skip()
 
     def OnCanvasResize(self, event):