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Index › Programming Questions & Help › Syntax Questions › Mouse over detection for PShape objects
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Mouse over detection for PShape objects (Read 1507 times)
jshens
Mouse over detection for PShape objects
Apr 16th, 2010, 2:05pm  
I'm building a geographic map visualization and have code that builds a chloroplath map of the US using an SVG file and PShape.

I want to do tool tips and other mouse-based events upon hovering over a particular county in the map. Every county is currently a child of the PShape called "county" and identified by a unique ID. How can I either bind a mouse event listener to every county on the map, or create a detection system where the mouse coordinates are measured and somehow the county "child" under the mouse is detected.

Any assistance with this would be great!
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PhiLho 
Re: Mouse over detection for PShape objects
Reply #1 - Apr 17th, 2010, 2:31am  
The Geomerative library is able to handle that, I think.
Otherwise, the common solution is to draw each shape on an off-screen buffer with a unique color. Then you map mouse position on this buffer and check the color it is over: that's the ID of your shape!
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