Question

Getting this error while I am trying to run /compile/build a Proiject

       Incompatible Types : “TBitmap” and “TObject”

The cursor is pointing to Bitmap := FSectionList.BackgroundBitmap

Kindly help me figure it out.
Struck here like a ambulance in heavy traffic

Here is the part of the code:-

procedure ThtmlViewer.DoBackground1(ACanvas: TCanvas; ATop, AWidth, AHeight, FullHeight: integer);
var
  ARect: TRect;
  Bitmap, Mask: TBitmap;
  PRec: PtPositionRec;
  BW, BH, X, Y, X2, Y2, IW, IH, XOff, YOff: integer;
  Fixed: boolean;

begin
ARect := Rect(0, 0, AWidth, AHeight);
Bitmap := FSectionList.BackgroundBitmap;    
if FSectionList.ShowImages and Assigned(Bitmap) then
  begin
  Mask := FSectionList.BackgroundMask;
  BW := Bitmap.Width;
  BH := Bitmap.Height;
  PRec := FSectionList.BackgroundPRec;
  Fixed := PRec[1].Fixed;
  if Fixed then
    begin  {fixed background}
    XOff := 0;
    YOff := 0;
    IW := AWidth;
    IH := AHeight;
    end
  else
    begin   {scrolling background}
    XOff := 0;
    YOff := ATop;
    IW := AWidth;
    IH := FullHeight;
    end;
  CalcBckgrndLoctionAndTilng(PRec, ARect, XOff, YOff, IW, IH, BW, BH, X, Y, X2, Y2);

  DrwBckgrnd(ACanvas, ARect, X, Y, X2, Y2, Bitmap, Mask, BW, BH, PaintPanel.Color);
  end
else
  begin  {no background image, show color only}
  DrwBckgrnd(ACanvas, ARect, 0,0,0,0, Nil, Nil, 0, 0, PaintPanel.Color);
  end;
end;

Thanks and Regards
Vas

Answer 1

I’m only guessing, but from the error message and the name of FSectionList, it’s some kind of List which holds generic TObject instances and BackgroundBitmap is one of them.

You would need to cast it back as a TBitmap:

Bitmap := FSectionList.BackgroundBitmap as TBitMap;