On Tuesday 26 September 2017 17:03:20 Martin Schreiber wrote: > > Would it be possible to draw on the canvas of a TSlider.scrollbar.face ? > > This to draw the wave-form of a song as background of a slider. > > Activate tslider.scrollbar.face, select a tfacecomp in template and use > tfacecomp.onafterpaint. > " > procedure tmainfo.faceafterpaint(const sender: tcustomface; > const canvas: tcanvas; const arect: rectty); > begin > canvas.drawline(arect.pos,ms(arect.cx-1,arect.cy-1),cl_red); > //ms is shorthand for makesize > end; > " Probably more efficient is to paint the background image one time to tslider.scrollbar.face.image.cavas.
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