Antonio Caccese a écrit :
I would create a function that allows the user to perform Zoom In in a
Point and Zoom Out from a Point on the StyledMapPane.
On the StyledMapPane i have defined standard mouse listener that
captures the point.
I'm not sure to understand exactly what you would like to do. The
default mouse listeners already zoom in or out from a point using mouse
wheel. I mean, when you move the mouse wheel, the point under the mouse
cursor doesn't move and everything else is zoomed around that point.
If you have yours own events handling, then you should be able to zoom
on a point with an AffineTransform. It should be something like that (if
I'm not making any mistake; I write that from memory without testing it):
AffineTransform change = new AffineTransform();
change.translate(centerX, centerY);
change.scale(zoom, zoom);
change.translate(-centerX, -centerY);
mapPane.transform(change);
The above assumes that the coordinates are expressed in "real world"
coordinate system. If you want to use pixel coordinates instead, then
invoke mapPane.transformPixels(change) instead of mapPane.transform(change).
Does it help?
Martin.
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