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 How can I get the image of ImageEnView screen display part?

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T O P I C    R E V I E W
foxdingding Posted - Jul 06 2022 : 01:58:14
How can I get the image of ImageEnView screen display part?

Like this Code:


Var
         bmpscreen:Tbitmap;
         FullscreenCanvas:TCanvas;
         dc:HDC;
         sourceRect, destRect: TRect;
         a,b,c,d:Integer;

Begin

         a:=0;
         b:=0;
         c:=ImageEnView1.Width;
         d:=ImageEnView1.Height;

         dc:=getdc(Self.ImageEnView1.Handle);
         fullscreencanvas:=Tcanvas.Create;
         bmpscreen:=Tbitmap.create;
Try	


            fullscreencanvas.Handle:=dc;

            bmpscreen.Width :=c-a;
            bmpscreen.Height :=d-b;
            sourcerect:=rect(0,0,c-a ,d-b );
            destrect:= rect(a,b,c,d);

            bmpscreen.Canvas.CopyRect(sourcerect,fullscreenCanvas,destrect);
            ImageEnView2.IEBitmap.CopyFromTBitmap(bmpscreen);
            ImageEnView2.Update;
       Finally
            bmpscreen.Free;
            FullscreenCanvas.Free;
            ReleaseDC(Self.ImageEnView1.Handle, DC);
         End;


4   L A T E S T    R E P L I E S    (Newest First)
xequte Posted - Jul 07 2022 : 23:53:24
Yes, you are right. We have added a TIEBitmap overload to the current beta so you can call like:

ImageEnView1.DrawTo( ImageEnView2.IEBitmap );
ImageEnView2.Update();


Nigel
Xequte Software
www.imageen.com
foxdingding Posted - Jul 07 2022 : 02:05:26
I think it should be this


Example
// draw in ImageEn2 all what is displayed in ImageEnView1
ImageEnView1.DrawTo(ImageEnView2.IEBitmap.Canvas);
ImageEnView2.Update;


Description
Returns the height of the area used to show the current image (i.e. the height of the image as it appears onscreen).
If scrollbars are visible, only the visible height will be returned.



Example

// Copy the actual view of ImageEnView1 as the current image of ImageEnView2
ImageEnView2.IEBitmap.Width := ImageEnView1.ExtentX;
ImageEnView2.IEBitmap.Height := ImageEnView1.ExtentY;
ImageEnView1.DrawTo(ImageEnView2.IEBitmap.Canvas);

xequte Posted - Jul 07 2022 : 00:38:26
Hi

If you are looking for the displayed area of the image please see:

https://www.imageen.com/help/TImageEnView.VisibleBitmapRect.html

There are examples there for drawing it to another ImageEnView.


Nigel
Xequte Software
www.imageen.com
foxdingding Posted - Jul 06 2022 : 02:01:03
I don't know whether I can or can' t?


            ImageEnView2.IEBitmap.Width := ImageEnView1.ExtentX;
            ImageEnView2.IEBitmap.Height := ImageEnView1.ExtentY;

            ImageEnView1.DrawTo(ImageEnView2.IEBitmap.Canvas);
            ImageEnView2.Update;