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Date Posted: 18:06:43 10/23/00 Mon
Author: Bill Miller
Subject: TImageScrollBox Zooming

In some testing here it looks like TImageScrollBox.ZoomPercent may be failing at 400-800 percent depending on the size of the image in the component. With a small 40x40 pixel image I can set ZoomPercent to over 800 percent, but with a 1024 x 768 image I can only reach about 400 percent.

After I reach these levels depending on the size of the image in the TImageScrollBox, the image appears to be entirely black. No error messages are produced.

Has this been reported before?

I thought it might be a memory problem but it does not seem to make a difference if running the compiled application stand-alone or from the IDE. I guess it could also be the video card...

The test computer is running Delphi 5, patch 2 with 128 megs ram.

Regards

Bill

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