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SWT: How to display image and draw on it  RSS feed

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i'm having trouble displaying a picture (png, size about 400x600px). i tried to display the picture within a label, that worked more or less but i guess it's not the way to do it. than i ran into the canvas widget. since then i've been trying to display the picture with the canvas, but i can't get it to work. my code looks as follows:

the image isn't drawn correctly, it's really messed up. an the canvas is very small as well, i want it to be the size of the image. later on i want to draw lines and stuff on the image with gc. has anyone an idea of how this could be done correctly?

kind regards
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