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{
***************************************************************************
* *
* This source is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This code is distributed in the hope that it will be useful, but *
* WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* General Public License for more details. *
* *
* A copy of the GNU General Public License is available on the World *
* Wide Web at <http://www.gnu.org/copyleft/gpl.html>. You can also *
* obtain it by writing to the Free Software Foundation, *
* Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1335, USA. *
* *
***************************************************************************
Abstract:
Show a window before the LCL is initialized.
}
unit raw_window;
{$mode objfpc}{$H+}
interface
{$IFDEF Windows}
{$IFDEF HEAPTRC_WINDOW}
{$IF FPC_FULLVERSION>=20701}
uses
SysUtils, Windows, Messages;
procedure ShowWindow(AStr : String);
{$ENDIF}
{$ENDIF}
{$ENDIF}
implementation
{$IFDEF Windows}
{$IFDEF HEAPTRC_WINDOW}
{$IF FPC_FULLVERSION>=20701}
Var
WndHandle,
ButtonHandle,
EditHandle : HWND;
OldSubProc : WNDPROC;
function isset(value: dword; bit: byte): boolean;
begin
result := value and (1 shl pred(bit)) <> 0;
end;
function WindowWndProc(Ahwnd: HWND; uMsg: UINT; wParam: WParam; lParam: LParam) : LRESULT; stdcall;
Var
ControlCode, ControlID : Word;
begin
Result := 0;
Case uMsg Of
WM_DESTROY : PostQuitMessage(0);
WM_COMMAND : Begin
ControlCode := HiWord(wParam);
ControlID := LoWord(wParam);
Case ControlCode Of
BN_CLICKED : If lParam = ButtonHandle Then
PostMessage(WndHandle, WM_CLOSE, 0, 0);
end;
end;
WM_SETFOCUS: SetFocus(EditHandle);
Else
Result := Windows.DefWindowProc(ahwnd, uMsg, wParam, lParam);
End;
end;
function EditSubProc(Ahwnd: HWND; uMsg: UINT; wParam: WParam; lParam: LParam) : LRESULT; stdcall;
Var
AKeyboardState : TKeyboardState;
Begin
Case uMsg of
WM_KEYDOWN : Begin
GetKeyboardState(AKeyboardState);
If isset(AKeyboardState[VK_CONTROL], 8) And isset(AKeyboardState[VK_A], 8) Then Begin
SendMessage(EditHandle, EM_SETSEL, 0, -1);
Exit(0);
end;
If isset(AKeyboardState[VK_CONTROL], 8) And isset(AKeyboardState[VK_C], 8) Then Begin
PostMessage(EditHandle, WM_COPY, 0, 0);
Exit(0);
End;
If isset(AKeyboardState[VK_RETURN], 8) Or isset(AKeyboardState[VK_ESCAPE], 8) Then Begin
PostMessage(ButtonHandle, BM_CLICK, 0, 0);
Exit(0);
end;
end;
End;
Result := CallWindowProc(OldSubProc, Ahwnd, uMsg, wParam, lParam);
end;
procedure ShowWindow(AStr : String);
Var
A_Atom : TAtom = 0;
WndClass : TWndClass;
Msg: TMsg;
ScreenWidth, ScreenHeight, MiddleX, MiddleY : LongInt;
Begin
FillChar(WndClass, SizeOf(TWndClass), 0);
ScreenWidth := GetSystemMetrics(SM_CXSCREEN);
ScreenHeight := GetSystemMetrics(SM_CYSCREEN);
MiddleX := (ScreenWidth - 500) Div 2;
MiddleY := (ScreenHeight - 500) div 2;
WndClass.lpszClassName:= 'HEAPTRACE_CLASS';
WndClass.lpfnWndProc := @WindowWndProc;
WndClass.hInstance := hInstance;
WndClass.hbrBackground:= 1;
WndClass.style := CS_HREDRAW or CS_VREDRAW;
WndClass.hCursor := LoadCursor(0, IDC_ARROW);
A_Atom := RegisterClass(WndClass);
WndHandle := CreateWindow(
WndClass.lpszClassName , // lpClassName, optional
'Heaptrace results', // lpWindowName, optional
WS_OVERLAPPEDWINDOW or WS_VISIBLE , // dwStyle
MiddleX, // x
MiddleY, // y
500, // nWidth
500, // nHeight
0, // hWndParent
0, // hMenu
WndClass.hInstance, // hInstance
nil // lpParam
);
// Button control
ButtonHandle := CreateWindow(
'BUTTON' , // lpClassName, optional
'OK', // lpWindowName, optional
WS_TABSTOP or WS_VISIBLE or WS_CHILD or BS_DEFPUSHBUTTON , // dwStyle
400, // x
400, // y
50, // nWidth
50, // nHeight
WndHandle, // hWndParent
0, // hMenu
WndClass.hInstance, // hInstance
nil // lpParam
);
// Edit control
EditHandle := CreateWindow(
'EDIT' , // lpClassName, optional
NIL, // lpWindowName, optional
WS_CHILD or WS_VISIBLE or WS_VSCROLL or WS_HSCROLL or WS_BORDER or ES_LEFT or ES_MULTILINE or ES_AUTOHSCROLL or ES_AUTOVSCROLL or ES_READONLY, // dwStyle
10, // x
10, // y
450, // nWidth
370, // nHeight
WndHandle, // hWndParent
0, // hMenu
WndClass.hInstance, // hInstance
nil // lpParam
);
SetWindowText(EditHandle, PChar(UTF8ToAnsi(AStr)));
OldSubProc := Windows.WNDPROC(GetWindowLongPtr(EditHandle, GWL_WNDPROC));
SetWindowLongPtr(EditHandle, GWL_WNDPROC, PtrUint(@EditSubProc));
BringWindowToTop(WndHandle);
SetFocus(EditHandle);
while GetMessage(Msg,0,0,0) do
DispatchMessage(Msg);
DestroyWindow(ButtonHandle);
DestroyWindow(EditHandle);
DestroyWindow(WndHandle);
UnregisterClass(WndClass.lpszClassName, WndClass.hInstance);
end;
{$ENDIF}
{$ENDIF}
{$ENDIF}
end.
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