On Tue, 17 Apr 2012 12:12:21 +0200 Marc Weustink <[email protected]> wrote:
> Mattias Gaertner wrote: > > > > Reimar Grabowski <[email protected]> hat am 16. April 2012 um 16:42 > > geschrieben: > > > > > Hi, > > > > > > I load a TLazIntfImage from disk, manipulate it and show it on my > > form in a TImage. Center, Proportional and Stretch properties of the > > TImage are set to true. > > > Now I want to draw some overlays onto it (drawing to the canvas in > > the OnPaint event). Therefor I obviously need the origin and dimensions > > of the loaded image in 'canvas space', but I did not find a way to > > retrieve this information. Do I have to calculate them myself or can the > > TImage give me the needed information? > > > > The image is painted to the area defined by the protected method DestRect. > > > > Maybe this can be made public. > > > > At the moment you have to descend your own TImage class to access it or > > write a hack class (e.g. via a class helper). > > TImage is not meant to draw to. If you want to custom paint your image, > use a TPaintbox > > A TImage is for display only. TImage has a published OnPaint event. Painting some overlays makes sense. And for this you need to know where the image is on the canvas. Mattias -- _______________________________________________ Lazarus mailing list [email protected] http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
