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Date Posted: 17:49:21 03/06/01 Tue
Author: Michel
Subject: Re: Acquiring coordinators for a section of an image
In reply to: Jason Offrey 's message, "Acquiring coordinators for a section of an image" on 22:35:59 03/05/01 Mon

Hi Jason,

Have you tried adding the Width and Height of the scroll box to your upper left corner? The you could calculate the crop transform coordinates from the size of the DisplayedImage.Width/Height properties.

Best regards,


>I have a large image loaded into a TImageScrollBox. I
>then click on an area and it automatically zooms in.
>I have tried creating a function which will crop the
>area currently viewable without requiring the user to
>select the area manually.
>The sample crop function requires the coordinates of
>the area to be cropped; I can get the upper left hand
>coordinates from the ScrollBars Positions but I can
>not figure out a way to get the lower right hand
>I am using Delphi 4 with Envision 1.1 and any help
>would be appreciated.

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