Working on the answer of my previous question, I wonder how to get the coordinates of the 4 pixels representing the corners of the rectangle as well as its 2 dimensions ?
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Answer
You can use canvas.bbox(item) to get the coordinates of the bounding box of an item on the canvas. Because your item is a rectangle, the bounding box exactly represents the rectangle.
In your case it would be:
JavaScript
x
2
1
self.canvas.bbox(self.rect)2
This returns a tuple containing (x0, y0, x1, y1) in which point 0 is the upper left corner and point 1 is the lower right corner.
You can easily convert these to the four corners and sizes:
JavaScript
1
8
1
Upper left = x0, y02
Upper right = x1, y03
Lower left = x0, y14
Lower right = x1, y15
6
width = x1-x07
height = y1-y08