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unit Unit1;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, LResources, Forms, Controls, Graphics, Dialogs, StdCtrls,
ExtCtrls;
type
{ TForm1 }
TForm1 = class(TForm)
Button1: TButton;
procedure Button1Click(Sender: TObject);
procedure FormCreate(Sender: TObject);
private
{ private declarations }
public
procedure ShapeControl(AControl: TWinControl);
end;
var
Form1: TForm1;
implementation
{$R unit1.lfm}
{ TForm1 }
procedure TForm1.Button1Click(Sender: TObject);
begin
ShapeControl(Self);
end;
procedure TForm1.FormCreate(Sender: TObject);
begin
Button1.Handle;
ShapeControl(Button1);
end;
procedure TForm1.ShapeControl(AControl: TWinControl);
var
ABitmap: TBitmap;
Points: array of TPoint;
begin
ABitmap := TBitmap.Create;
ABitmap.Monochrome := True;
ABitmap.Width := AControl.Width;
ABitmap.Height := AControl.Height;
SetLength(Points, 6);
Points[0] := Point(0, ABitmap.Height div 2);
Points[1] := Point(10, 0);
Points[2] := Point(ABitmap.Width - 10, 0);
Points[3] := Point(ABitmap.Width, ABitmap.Height div 2);
Points[4] := Point(ABitmap.Width - 10, ABitmap.Height);
Points[5] := Point(10, ABitmap.Height);
with ABitmap.Canvas do
begin
Brush.Color := clBlack; // transparent color
FillRect(0, 0, ABitmap.Width, ABitmap.Height);
Brush.Color := clWhite; // mask color
Polygon(Points);
end;
AControl.SetShape(ABitmap);
ABitmap.Free;
end;
end.
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