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 Provide a callback to allow custom drawing of the selection/cropping

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T O P I C    R E V I E W
jiang_jiji Posted - Mar 31 2026 : 04:49:41
I'm currently building an image editing application similar to https://www.canva.com

If I want to customize the selection/cropping effect, I have to modify the source code directly, which is not convenient for future updates or maintaining software.

Could you consider providing a callback function to allow custom rendering of the selection/cropping effect?

For example, something like this:

TIECropToolInteraction.OnBeforePaintBackBuffer
TIECropToolInteraction.OnPaintBackBuffer


Selection Effect:


Crop Effect:
1   L A T E S T    R E P L I E S    (Newest First)
xequte Posted - Mar 31 2026 : 19:21:03
Hi

We could add before and after paint items to the OnUserInteraction event:

http://www.imageen.com/help/TImageEnView.OnUserInteraction.html

Would that work?


Nigel
Xequte Software
www.imageen.com