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Date Posted: 07:34:33 10/25/02 Fri
Author: Michel
Subject: Re: OnImageMouseUp problem
In reply to: Ed Fessler 's message, "OnImageMouseUp problem" on 16:41:51 10/24/02 Thu

Hi Ed,

I looked at the source, and the Sender is the original Sender from the VCL, ie, the object on which the X,Y coordinates are from. I can make the Sender the TImageScrollBox box, but then the X,Y coordinates will not be with respect to the client area of the image scroll.

This also gets confusing, because the mouse event may come from the TImage on the scroll box or from the TScrollBox if the mouse event is not on the image (when the image does not take up the entire scroll box.

To make things simpler, I'll make the Sender the TImageScrollBox. Just locate the

procedure TImageScrollBox.ImageMouseDown
procedure TImageScrollBox.ImageMouseMoveprocedure procedure TImageScrollBox.ImageMouseUp
procedure TImageScrollBox.ImageDblClick

and replace the Sender with Self. I have updated my code base.

Best regards,


>I am having trouble with the OnImageMouseUp event. It
>works ok except that I am creating several
>TImageScrollbox components on my form at runtime. I
>set all of the OnImageMouseUp events to the same
>event. When this event fires, I need to know which
>image scroll box fired the event. I thought the the
>"sender" parameter would have that component that
>fired the event, but it does not seem to.
>Let me know what you think.

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