'''The ClickableWindow class demonstrates how to handle mouse events.

Jeff Ondich, 25 Feb 2007

This sample class uses the Tkinter "bind_all" mechanism to trap
left-mouse-button events and respond to them appropriately.  The
ClickableWindow class inherits from John Zelle's GraphWin class, so
to use this sample, you need to have Zelle's "graphics" module.

The discussion of Events and Bindings in the Tkinter library at
http://www.pythonware.com/library/tkinter/introduction/events-and-bindings.htm
describes more things you can do with a mouse.
'''

from graphics import *

class ClickableWindow(GraphWin):
    def __init__(self, *args):
        GraphWin.__init__(self, *args)
        self.setBackground(color_rgb(255, 255, 255))
        self.textX = 500
        self.textY = 50
        self.textObject = Text(Point(self.textX, self.textY), 'Click Somewhere')
        self.bind_all('<Button-1>', self.mouseHandler)
        self.textObject.draw(self)

    def mouseHandler(self, event):
        dx = event.x - self.textX
        dy = event.y - self.textY
        self.textObject.setText('Ouch')
        self.textObject.move(dx, dy)
        self.textX += dx
        self.textY += dy

if __name__ == '__main__':
    window = ClickableWindow('Mouse Test', 1000, 600)
    while window.winfo_exists():
        window.update()