Fix that enable/disable does not immediately redraw. Fix that buttons are not disabled on disconnect.

pronterface.py

@@ -133,8 +133,11 @@ class PronterWindow(wx.Frame,pronsole.pronsole):
         wx.CallAfter(self.connectbtn.Disable)
         for i in self.printerControls:
             wx.CallAfter(i.Enable)
+
+        # Enable XYButtons and ZButtons
         self.xyb.enable()
         self.zb.enable()
+
         if self.filename:
             wx.CallAfter(self.printbtn.Enable)
         
@@ -1313,6 +1316,10 @@ class PronterWindow(wx.Frame,pronsole.pronsole):
         wx.CallAfter(self.pausebtn.Disable);
         for i in self.printerControls:
             wx.CallAfter(i.Disable)
+
+        # Disable XYButtons and ZButtons
+        self.xyb.disable()
+        self.zb.disable()
         
         if self.paused:
             self.p.paused=0

xybuttons.py

@@ -47,9 +47,11 @@ class XYButtons(BufferedCanvas):
     
     def disable(self):
         self.enabled = False
+        self.update()
     
     def enable(self):
         self.enabled = True
+        self.update()
     
     def distanceToLine(self, pos, x1, y1, x2, y2):
         xlen = x2 - x1

zbuttons.py

@@ -33,9 +33,11 @@ class ZButtons(BufferedCanvas):
 
     def disable(self):
         self.enabled = False
+        self.update()
     
     def enable(self):
         self.enabled = True
+        self.update()
 
     def lookupRange(self, ydist):
         idx = -1