Kullandiginiz formlarin baslik alanina buton ekleyip, bu butona bazi görevler yükleyebilirsiniz.
unit CapBtn;
interface
uses
Windows, Buttons, Messages, SysUtils, Classes, Graphics,
Controls, Forms, Dialogs;
type
TForm1 = class(TForm)
procedure FormResize(Sender: TObject);
private
CaptionBtn : TRect;
procedure DrawCaptButton;
procedure WMNCPaint(var Msg : TWMNCPaint); message
WM_NCPaint;
procedure WMNCActivate(var Msg : TWMNCActivate); message
WM_NCACTIVATE;
procedure WMSetText(var Msg : TWMSetText); message
WM_SETTEXT;
procedure WMNCHitTest(var Msg : TWMNCHitTest); message
WM_NCHITTEST;
procedure WMNCLButtonDown(var Msg : TWMNCLButtonDown);
message WM_NCLBUTTONDOWN;
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
const
htCaptionBtn = htSizeLast + 1;
{$R *.DFM}
procedure TForm1.DrawCaptButton;
var
xFrame,
yFrame,
xSize,
ySize : Integer;
R : TRect;
begin
//Form eni ve boyu
xFrame := GetSystemMetrics(SM_CXFRAME);
yFrame := GetSystemMetrics(SM_CYFRAME);
//Baslik butonlarinin eni ve boyu
xSize := GetSystemMetrics(SM_CXSIZE);
ySize := GetSystemMetrics(SM_CYSIZE);
//Yeni butonun yeri
CaptionBtn := Bounds(Width - xFrame - 4*xSize + 2,
yFrame + 2, xSize - 2, ySize - 4);
//Forma ait DC 'yi kullanarak,
//üzerine cizim yapilacak tuvali bul
Canvas.Handle := GetWindowDC(Self.Handle);
Canvas.Font.Name := 'Symbol';
Canvas.Font.Color := clBlue;
Canvas.Font.Style := [fsBold];
Canvas.Pen.Color := clYellow;
Canvas.Brush.Color := clBtnFace;
try
DrawButtonFace(Canvas, CaptionBtn, 1, bsAutoDetect,
False, False, False);
R := Bounds(Width - xFrame - 4 * xSize + 2,
yFrame + 3, xSize - 6, ySize - 7);
with CaptionBtn do
Canvas.TextRect(R, R.Left + 2, R.Top - 1, 'W');
finally
ReleaseDC(Self.Handle, Canvas.Handle);
Canvas.Handle := 0;
end;
end;
procedure TForm1.WMNCPaint(var Msg : TWMNCPaint);
begin
inherited;
DrawCaptButton;
end;
procedure TForm1.WMNCActivate(var Msg : TWMNCActivate);
begin
inherited;
DrawCaptButton;
end;
procedure TForm1.WMSetText(var Msg : TWMSetText);
begin
inherited;
DrawCaptButton;
end;
procedure TForm1.WMNCHitTest(var Msg : TWMNCHitTest);
begin
inherited;
with Msg do
if PtInRect(CaptionBtn, Point(XPos - Left, YPos - Top))
then
Result := htCaptionBtn;
end;
procedure TForm1.WMNCLButtonDown(var Msg : TWMNCLButtonDown);
begin
inherited;
if (Msg.HitTest = htCaptionBtn) then
ShowMessage('Hoops... yeni butona bastin');
end;
procedure TForm1.FormResize(Sender: TObject);
begin
//Baslik cubugunun yeniden cizilmesini sagla
Perform(WM_NCACTIVATE, Word(Active), 0);
end;
end.