Matt's examples
diff --git a/Demo/tkinter/matt/canvas-moving-w-mouse.py b/Demo/tkinter/matt/canvas-moving-w-mouse.py
new file mode 100644
index 0000000..fab480b
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+++ b/Demo/tkinter/matt/canvas-moving-w-mouse.py
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+from Tkinter import *
+
+# this file demonstrates the movement of a single canvas item under mouse control
+
+class Test(Frame):
+ ###################################################################
+ ###### Event callbacks for THE CANVAS (not the stuff drawn on it)
+ ###################################################################
+ def mouseDown(self, event):
+ # remember where the mouse went down
+ self.lastx = event.x
+ self.lasty = event.y
+
+
+ def mouseMove(self, event):
+ # whatever the mouse is over gets tagged as "current" for free by tk.
+ self.draw.move("current", event.x - self.lastx, event.y - self.lasty)
+ self.lastx = event.x
+ self.lasty = event.y
+
+ ###################################################################
+ ###### Event callbacks for canvas ITEMS (stuff drawn on the canvas)
+ ###################################################################
+ def mouseEnter(self, event):
+ # the "current" tag is applied to the object the cursor is over.
+ # this happens automatically.
+ self.draw.itemconfig("current", {"fill" : "red"})
+
+ def mouseLeave(self, event):
+ # the "current" tag is applied to the object the cursor is over.
+ # this happens automatically.
+ self.draw.itemconfig("current", {"fill" : "blue"})
+
+
+ def createWidgets(self):
+ self.QUIT = Button(self, {'text': 'QUIT',
+ 'fg': 'red',
+ 'command': self.quit})
+ self.QUIT.pack({'side': 'left', 'fill': 'both'})
+ self.draw = Canvas(self, {"width" : "5i", "height" : "5i"})
+ self.draw.pack({'side': 'left'})
+
+
+ fred = self.draw.create_oval(0, 0, 20, 20,
+ {"fill" : "green", "tag" : "selected"})
+
+ self.draw.bind(fred, "<Any-Enter>", self.mouseEnter)
+ self.draw.bind(fred, "<Any-Leave>", self.mouseLeave)
+
+
+ Widget.bind(self.draw, "<1>", self.mouseDown)
+ Widget.bind(self.draw, "<B1-Motion>", self.mouseMove)
+
+ def __init__(self, master=None):
+ Frame.__init__(self, master)
+ Pack.config(self)
+ self.createWidgets()
+
+test = Test()
+test.mainloop()