Canvas geometry

[Stephen D Evans]

Have you tried the <configure> event ? The height and width of the canvas
are in the event properties. Here are some code fragments:


def configureEvent(event):
    width = event.width
    height = event.height


canvas.bind('<Configure>', configureEvent)

Stephen D. Evans


Hans Kristian Ruud wrote:

> Hello
>
>       I try to retrieve the dimensions of a canvas in the following
> manner:
>
>       h = eval( self.canvas.cget('height')  )
>       w = eval( self.canvas).cget('width')  )
>
>       however this does noe yield the true values (as I have
> demonstrated by this
>       code):
>
>       self.canvas.create_line(5,5,5,h-5,w-5,h-5,w-5,5,5,5,fill='red')
>
>       The code in question is based upon the example draw3.py in
> Grayson's book
>       Python and Tkinter programming (Chapter 10.2)
>
>       How do I retrieve the "true" extensions of the canvas?
>
>       På forhånd takk ( Thanks in advance )
>
>       - hans kristian -
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