TMetafileCreate (Delphi)

Description

This example shows how to create or augment a metafile using a metafile canvas object. This metafile can then be used to draw on the canvas of another object such as a paintbox or a printer.

Code

var
  MyMetafile: TMetafile;

procedure TForm1.Button1Click(Sender: TObject);
begin
  MyMetafile := TMetafile.Create;
  with TMetafileCanvas.Create(MyMetafile, 0) do
  try
    Brush.Color := clRed;
    Ellipse(0, 0, 100, 200);
    //  ...
  finally
//    Free;
  end;
  Form1.Canvas.Draw(0, 0, MyMetafile); {1 red circle }
  PaintBox1.Canvas.Draw(0, -50, MyMetafile); {1 red circle }
end;

{
To add to an existing metafile image, create a metafile
canvas and play the source metafile into the metafile canvas.
procedure TForm1.Button2Click(Sender: TObject);
begin
  if (MyMetafile = nil) then exit;  { Click Button1 first. }
  
  with TMetafileCanvas.Create(MyMetafile, 0) do
  try
    Draw(-50, 0, MyMetafile);
    Brush.Color := clBlue;
    Ellipse(100, 100, 300, 200);
// ...
  finally
//    Free;
  end;
  Form1.Canvas.Draw(0, 0, MyMetafile); { One red circle and one blue circle }
  PaintBox1.Canvas.Draw(0, 0, MyMetafile); { One red circle and one blue circle }
end;

Uses

• Vcl.Graphics.TMetafile.Create ( fr | de | ja )
• Vcl.Graphics.TMetafileCanvas.Create ( fr | de | ja )