How to center a TOpenDialog on a form (Views: 29)
Problem/Question/Abstract: How to center a TOpenDialog on a form Answer: { ... } type TForm1 = class(TForm) Button1: TButton; OpenDialog1: TOpenDialog; procedure Button1Click(Sender: TObject); procedure OpenDialog1Show(Sender: TObject); private { Private declarations } procedure MoveDialog(var Msg: TMessage); message WM_USER; public { Public declarations } end; var Form1: TForm1; implementation {$R *.DFM} procedure TForm1.Button1Click(Sender: TObject); begin OpenDialog1.Execute; end; procedure TForm1.OpenDialog1Show(Sender: TObject); begin PostMessage(Self.Handle, WM_USER, 0, 0); end; procedure TForm1.MoveDialog(var Msg: TMessage); var rec: TRect; wh: HWND; l, t, r, b: Integer; begin if ofOldStyleDialog in OpenDialog1.Options then wh := OpenDialog1.Handle else wh := Windows.GetParent(OpenDialog1.Handle); if IsWindow(wh) then if GetWindowRect(wh, rec) then begin l := (Width - (rec.Right - rec.Left)) div 2 + Left; t := (Height - (rec.Bottom - rec.Top)) div 2 + Top; r := rec.Right - rec.Left; b := rec.Bottom - rec.Top; MoveWindow(wh, l, t, r, b, True); end; end; |