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Date Posted: 21:22:38 03/16/04 Tue
Author: Michel
Subject: Re: Screen Flickering
In reply to: Peter Dove 's message, "Screen Flickering" on 16:37:35 03/15/04 Mon


Hi Peter,

Manipulating the scroll bars in the TImageScrollBox will cause flickering. The image scroll box is based on the VCL's TScrollBox, and as far as I know, I don't think this can be removed.

Depending on your requirements, using a TImage has less overhead and may improve the situation.

Best regards,

Michel

>Hi,
>
>I am having a problem with the image flickering
>whenever I update. In order to keep the image in the
>same place in the scroll box I have used the following
>code. My question is, is there a way to stop the image
>flickering everytime there is a redraw??
>
> scrollposX :=
>ImageScrollBox1.HorzScrollBar.ScrollPos;
> scrollPosY :=
>ImageScrollBox1.VertScrollBar.ScrollPos;
>
> sp.ConvertFPToBitmap( True );
> ImageScrollBox1.Graphic.Assign( sp.Bitmap);
> ImageScrollBox1.Redraw(False);
> ImageScrollBox1.HorzScrollBar.Position := scrollPosX;
> ImageScrollBox1.VertScrollBar.Position := scrollPosY;

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