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Date Posted: 00:40:39 11/12/03 Wed
Author: JK
Subject: Re: Please check my code ?
In reply to: Michel 's message, "Re: How to print a current view ?" on 07:51:25 11/11/03 Tue


Hi Michel,

I coded for moving my old view point after zoom in,out, but
the code didnot work correctly.
Please check my code.

Regards,JK


Hrange := ImageScrollBox.HorzScrollBar.Range;
Vrange := ImageScrollBox.VertScrollBar.Range;
HPosition := ImageScrollBox.HorzScrollBar.Position; //HorzScrollBar.Position;
VPosition := ImageScrollBox.VertScrollBar.Position; //VertScrollBar.Position;
if HPosition>0 then gv_HsbarRate := HPosition/Hrange
else gv_HsbarRate := 0;
if VPosition>0 then gv_VsbarRate := VPosition/Vrange
else gv_VsbarRate := 0;

//zoom in, out

ImageScrollBox.HorzScrollBar.Position :=
Trunc(ImageScrollBox.HorzScrollBar.Range * gv_HsbarRate);
ImageScrollBox.VertScrollBar.Position :=
Trunc(ImageScrollBox.VertScrollBar.Range * gv_VsbarRate);



>
>Hi JK,
>
>You will need to combine a few things to do this.
>TImageScrollBox has a property call ImageRect which
>will give the coordinates of the TImage on the
>TImageScrollBox.
>
>You will also need the position of the scroll bars,
>ImageScrollBox.HorzScrollBar, VertScrollBar.Position
>to deterimine the offset in the displayed graphic.
>
>Then you can use the TCropTransform to extract the
>current view on the ImageScrollBox.DisplayedGraphic.
>
>Best regards,
>
>Michel
>
>
>>
>> Hi All,
>>
>> I want to print the current display after zoom in,
>>zoom out
>> and zoom pan. How can i do this ?
>>
>> Regards,JK

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