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Date Posted: 18:31:44 06/29/00 Thu
Author: Michel
Subject: Re: Stamping on the image.
In reply to: Mahan 's message, "Stamping on the image." on 23:45:11 06/28/00 Wed


Hi Mahan,

The coordinates returned by the mouse events are with respect to the graphic displayed on

screen after it is zoomed. If you want to "stamp" the original image you will need to

"scale" those coordinates depending on the zoom value and the size of the original image.

Look at the GetSourceSelection method in TRubberbandMouseHandler. It shows how to convert

from pixel values on the TImageScrollBox to pixel values in the original image.

Best regards,

Michel

> Hi
> Im using TImageScrollBox component from the new
> Envision beta 1.05 which now returns X,Y coords on
> mouse events. What i intend to do is stamping on an
> image which is loaded in this component. every thing
> goes well unless the image is bigger than the size of
> the component. in such condition, the image and the
> X,Y coords returned by the handler are not calibrated
> and so it stamps on a spot far from where i click. I
> couldnt find a pattern for calibrating although ive
> used different ZoomMode and ZoomPercent.
> (Im using Delphi5 Professional)
> Any help is appreciated.
> Yours,
> mahan

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