--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/symbian-qemu-0.9.1-12/python-2.6.1/Demo/tkinter/matt/canvas-gridding.py	Fri Jul 31 15:01:17 2009 +0100
@@ -0,0 +1,61 @@
+from Tkinter import *
+
+# this is the same as simple-demo-1.py, but uses
+# subclassing.
+# note that there is no explicit call to start Tk.
+# Tkinter is smart enough to start the system if it's not already going.
+
+class Test(Frame):
+    def printit(self):
+        print "hi"
+
+    def createWidgets(self):
+        self.QUIT = Button(self, text='QUIT',
+                                  background='red',
+                                  foreground='white',
+                                  height=3,
+                                  command=self.quit)
+        self.QUIT.pack(side=BOTTOM, fill=BOTH)
+
+        self.canvasObject = Canvas(self, width="5i", height="5i")
+        self.canvasObject.pack(side=LEFT)
+
+    def mouseDown(self, event):
+        # canvas x and y take the screen coords from the event and translate
+        # them into the coordinate system of the canvas object
+        self.startx = self.canvasObject.canvasx(event.x, self.griddingSize)
+        self.starty = self.canvasObject.canvasy(event.y, self.griddingSize)
+
+    def mouseMotion(self, event):
+        # canvas x and y take the screen coords from the event and translate
+        # them into the coordinate system of the canvas object
+        x = self.canvasObject.canvasx(event.x, self.griddingSize)
+        y = self.canvasObject.canvasy(event.y, self.griddingSize)
+
+        if (self.startx != event.x)  and (self.starty != event.y) :
+            self.canvasObject.delete(self.rubberbandBox)
+            self.rubberbandBox = self.canvasObject.create_rectangle(
+                self.startx, self.starty, x, y)
+            # this flushes the output, making sure that
+            # the rectangle makes it to the screen
+            # before the next event is handled
+            self.update_idletasks()
+
+    def __init__(self, master=None):
+        Frame.__init__(self, master)
+        Pack.config(self)
+        self.createWidgets()
+
+        # this is a "tagOrId" for the rectangle we draw on the canvas
+        self.rubberbandBox = None
+
+        # this is the size of the gridding squares
+        self.griddingSize = 50
+
+        Widget.bind(self.canvasObject, "<Button-1>", self.mouseDown)
+        Widget.bind(self.canvasObject, "<Button1-Motion>", self.mouseMotion)
+
+
+test = Test()
+
+test.mainloop()