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3/13/2005 2:57:00 AM
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unit main;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
ComCtrls, ExtCtrls, StdCtrls;
const
wm_BtnClk = wm_User + 111;
type
TForm1 = class(TForm)
procedure FormDestroy(Sender: TObject);
private
{ Private declarations }
R: TRect;
Press: Boolean;
procedure WmNcPaint(var Msg: TWmNcPaint); message wm_NcPaint;
procedure WMNcActivate(var msg: TwmncActivate); message wm_NcActivate;
procedure WmNcLButtonDown( var Msg: TWMNCLBUTTONDOWN); message
Wm_NCLbuttonDown;
procedure wmnchittest(var Msg: TWMncHITTEST); message wm_NcHittest;
procedure wmSize(var Msg: TMessage); message wm_Size;
procedure wmncLButtonUp(var msg: TWMncLBUTTONUP); message wm_NclButtonUp;
procedure wmLbuttonUp(var Msg: TMessage); message wm_LbuttonUp;
procedure wmBtnClk(var msg: TMessage); message wm_BtnClk;
public
{ Public declarations }
procedure DrawBtn;
end;
var
Form1: TForm1;
implementation
{$R *.DFM}
{ TForm1 }
procedure TForm1.WmNcPaint(var Msg: TWmNcPaint);
begin
inherited;
Drawbtn;
end;
procedure TForm1.DrawBtn;
var
WDc: HDc;
Cx,Cy: Integer;
XFrame, Yframe: Integer;
begin
WDc := GetWindowDc(Handle);
Cx := GetSystemMetrics(SM_CXSize);
Cy := GetSystemMetrics(SM_CYSize);
xFrame := GetSystemMetrics(SM_CXFrame);
yFrame := GetSystemMetrics(SM_CYFrame);
R := Bounds(Width - xFrame - 4*Cx + 2, yFrame + 2, Cx - 2, Cy - 4);
if Press then
DrawFrameControl(WDc,R,DFC_BUTTON,DFCS_ButtonPUSH or DFCS_PUSHED)
else
DrawFrameControl(WDc,R,DFC_BUTTON,DFCS_ButtonPUSH);
ReleaseDc(Handle,WDC);
end;
procedure TForm1.WMNcActivate(var msg: TwmncActivate);
begin
inherited;
DrawBtn;
end;
procedure TForm1.WmNcLButtonDown(var Msg: TWMNCLBUTTONDOWN);
var pt: TPoint;
begin
inherited;
drawbtn;
pt := Point(msg.XCursor - Left,msg.YCursor - top);
if PtInRect(R,pt) then
begin
Press := True;
drawbtn;
end;
end;
procedure TForm1.wmnchittest(var Msg: TWMncHITTEST);
var pt: tpoint;
begin
inherited;
pt :=Point(msg.XPos - Left, msg.YPos - Top);
if PtinRect(r,pt) then
msg.Result := htBorder;
end;
procedure TForm1.wmSize(var Msg: TMessage);
begin
inherited;
RedrawWindow(Handle, PRect(0), 0, RDW_FRAME or RDW_NOINTERNALPAINT or
RDW_INVALIDATE);
end;
procedure TForm1.wmncLButtonUp(var msg: TWMncLBUTTONUP);
var pt: TPoint;
begin
inherited;
pt := Point(msg.XCursor - Left,msg.YCursor - top);
if PtInRect(R,pt) then
begin
Press := False;
drawbtn;
PostMessage(Handle,wm_btnClk,0,0);
end;
end;
procedure TForm1.wmLbuttonUp(var Msg: TMessage);
begin
inherited;
if Press then
begin
Press := False;
DrawBtn;
end;
end;
procedure TForm1.wmBtnClk(var msg: TMessage);
begin
ShowMessage(''***'');
end;
procedure TForm1.FormDestroy(Sender: TObject);
begin
RedrawWindow(Handle, PRect(0), 0, RDW_FRAME or RDW_NOINTERNALPAINT or
RDW_INVALIDATE);
end;
end.