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 How to avoid AV in Palette Demo?		  New Topic  Reply to Topic
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PeterPanino

860 Posts
Posted - Sep 15 2017 :  18:42:03  Show Profile  Reply
Hello,

in the demo \ImageEn\Demos\ImageAnalysis\Palette an AV is triggered when clicking on an empty space on the TImageEnView (but still on the TImageEnView):



Since the X and Y values are still positive, how can this error be avoided?

PeterPanino

860 Posts
Posted - Sep 15 2017 :  19:45:34  Show Profile  Reply
Could this be the solution?

if not ImageEnView1.VisibleBitmapRect.Contains(Point(ImageEnView1.XScr2Bmp(X), ImageEnView1.YScr2Bmp(Y))) then EXIT;
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xequte

38179 Posts
Posted - Sep 17 2017 :  20:32:02  Show Profile  Reply
Hi Peter

Sorry, we don't do any sanity checking there to ensure you are over the image. You just need to compare the result from XScr2Bmp/YScr2Bmp to the bitmap size.

I've attached an updated demo...

attach/xequte/2017917203158_Palette.zip
13.17 KB

Nigel
Xequte Software
www.xequte.com
nigel@xequte.com
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