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+--- Thread: Bitmap coordinates on mouse move or click (/showthread.php?tid=36)
Bitmap coordinates on mouse move or click - cjlindstrom - 05-03-2010
I have a need for a viewer that will allow me to shot an image and when in the mouse move event I want to track the actual bitmap pixel coordinate no matter what zoom level or pan position. So I guess I need to translate mouse location to image pixel. Can you do that with your zoom panel?
Thanks,
Craig
RE: Bitmap coordinates on mouse move or click - abenedik - 05-06-2010
This is very easy to do.
Check out the Painter sample that comes with ZoomPanel.
Here user can draw lines on a Canvas named PaintCanvas.
On PaintCanvas's left mouse down event handler the coordinates of the mouse on the PaintCanvas are get with:
Code:
private void PaintCanvas_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
Point startPoint;
startPoint = e.GetPosition(PaintCanvas);The startPoint is the actual point on the canvas - the same point/pixel will always have the same coordinates regardless of the applied zoom and panning.