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Date Posted: 21:11:04 01/26/04 Mon
Author: Michel
Subject: Re: Add an Image as anotation from stream
In reply to: Andreas 's message, "Add an Image as anotation from stream" on 13:23:36 01/26/04 Mon


Hi Andreas,

You need to create TempGraphic of the proper type instead of TDibGraphic. Then use TempGraphic.LoadFromStream.

Do you know in advance what type of graphic is in the Stream? If you don't know, you can use, EnDiGrph.GuessDibGraphicClass to determine the graphic class.

Best regards,

Michel

>Dear forum,
>i tried to add an image as an anotation without first
>adding it with TImageScrollBox->AddImage()
>and then change the properties and load an image.
>
>The code below works fine if I load the picture from a
>file.
>
>But now i want to load the image from a stream which
>has been filled by the
>TImageScrollBox->SaveToStream() function.
>
>Maybee somebody has a hint
>
>greetings
>Andreas
>
>
>
>function TAnnotationsEditor.AddImageAt(const iX:
>Integer;
> const iY:
>Integer ;
> const iStream
>: TStream): TImageMark;
>var
> TempRect :TRect;
> TempImage :TImage;
> TempGraphic :TDibGraphic;
>begin
> FChanged := True;
> Result := TImageMark( Items[FMarks.Add(
>TImageMark.Create( Self))]);
> TempGraphic:= TDibGraphic.Create;
> TempImage:=TImage.Create(Self);
>
>TempGraphic.NewImage(1024,786,ifTrueColor,NIL,180,180);
> TempImage.Picture.LoadFromFile('tmp0.jpg');
> TempGraphic.Assign(TempImage.Picture.Graphic);
> Result.DIBHandle:=TempGraphic.AsDibHandle;
> TempRect.Left := iX;
> TempRect.Top := iY;
> TempRect.Right := TempGraphic.Width+iX;
> TempRect.Bottom := TempGraphic.Height+iY;
> Result.MarkRect := TempRect;
> Result.ZoomFactor := FZoomFactor;
> Result.Parent := FDisplaySurface;
> Result.EditMode := FEditMode;
>end;

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