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/*-----------------------------------------------------------------------------
# Name: CWnd.h
# Product: ClamWin Antivirus
# Licence:
# This program 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 program 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.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#-----------------------------------------------------------------------------
this code is based on the following article by Jason Henderson:
http://www.codeproject.com/win32/win32windowwrapperclass.asp
*/
#ifndef _CWND_H_
#define _CWND_H_
#include "StdString.h"
class CWnd
{
public:
// many different ways to register
virtual BOOL RegisterWindow();
virtual BOOL RegisterWindow(UINT style, HICON hIcon, HCURSOR hCursor, HBRUSH hbrBackground,
LPCTSTR lpszMenuName, LPCTSTR lpszClassName, HICON hIconSm);
virtual BOOL RegisterWindow(CONST WNDCLASSEX* wcx);
// static message handler to put in WNDCLASSEX structure
static LRESULT CALLBACK stWinMsgHandler(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
// just so you can change the window caption...
void SetWindowTitle(LPCTSTR lpszTitle)
{
m_sWindowTitle = lpszTitle;
};
// 3 ways to create
virtual BOOL Create();
virtual BOOL Create(DWORD dwStyles, RECT* rect);
virtual BOOL CreateEx(DWORD dwExStyle, LPCTSTR lpszClassName,
LPCTSTR lpszWindowName, DWORD dwStyle,
RECT& rect, HWND hwndParent,
HMENU nIDorHMenu, LPVOID lpParam = NULL );
void SetIcon(HICON hIcon) { m_hIcon = hIcon; };
//void MsgLoop();
BOOL IsWindowClosed() { return m_bWindowClosed; };
protected:
HINSTANCE m_hInstance;
HWND m_hWnd;
BOOL m_bWindowClosed;
CStdString m_sClassName;
CStdString m_sWindowTitle;
HICON m_hIcon;
//contructor
CWnd(HINSTANCE hInst, CONST WNDCLASSEX* wcx = NULL)
:m_hWnd(NULL),
m_hInstance(NULL),
m_hIcon(NULL),
m_bWindowClosed(FALSE)
{
m_hInstance = hInst;
if (wcx != NULL) RegisterWindow(wcx);
};
~CWnd()
{
if(m_hIcon != NULL)
CloseHandle(m_hIcon);
m_hIcon = NULL;
}
// the real message handler
virtual LRESULT CALLBACK WinMsgHandler(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) = 0;
// returns a pointer the window (stored as the WindowLong)
inline static CWnd *GetObjectFromWindow(HWND hWnd)
{
return (CWnd *)GetWindowLong(hWnd, GWL_USERDATA);
}
};
inline BOOL CWnd::RegisterWindow()
{
WNDCLASSEX wcx;
// Fill in the window class structure with default parameters
wcx.cbSize = sizeof(WNDCLASSEX); // size of structure
wcx.style = CS_HREDRAW | CS_VREDRAW; // redraw if size changes
wcx.lpfnWndProc = CWnd::stWinMsgHandler; // points to window procedure
wcx.cbClsExtra = 0; // no extra class memory
wcx.cbWndExtra = 0; // no extra window memory
wcx.hInstance = m_hInstance; // handle to instance
wcx.hIcon = m_hIcon; // predefined app. icon
wcx.hCursor = LoadCursor(NULL, IDC_ARROW); // predefined arrow
wcx.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH); // white background brush
wcx.lpszMenuName = NULL; // name of menu resource
wcx.lpszClassName = "BaseWindow"; // name of window class
wcx.hIconSm = LoadIcon(NULL, IDI_APPLICATION); // small class icon
// Register the window class.
return RegisterWindow(&wcx);
}
inline BOOL CWnd::RegisterWindow(UINT style, HICON hIcon, HCURSOR hCursor, HBRUSH hbrBackground,
LPCTSTR lpszMenuName, LPCTSTR lpszClassName, HICON hIconSm)
{
WNDCLASSEX wcx;
// Fill in the window class structure with default parameters
wcx.cbSize = sizeof(WNDCLASSEX); // size of structure
wcx.style = style; // redraw if size changes
wcx.lpfnWndProc = CWnd::stWinMsgHandler; // points to window procedure
wcx.cbClsExtra = 0; // no extra class memory
wcx.cbWndExtra = 0; // no extra window memory
wcx.hInstance = m_hInstance; // handle to instance
wcx.hIcon = hIcon; // predefined app. icon
wcx.hCursor = hCursor; // predefined arrow
wcx.hbrBackground = hbrBackground; // white background brush
wcx.lpszMenuName = lpszMenuName; // name of menu resource
wcx.lpszClassName = lpszClassName; // name of window class
wcx.hIconSm = hIconSm; // small class icon
// Register the window class.
return RegisterWindow(&wcx);
}
inline BOOL CWnd::RegisterWindow(CONST WNDCLASSEX* wcx)
{
// Register the window class.
m_sClassName = wcx->lpszClassName;
if (RegisterClassEx(wcx) == 0)
return FALSE;
else
return TRUE;
}
inline LRESULT CALLBACK CWnd::stWinMsgHandler(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
CWnd* pWnd;
if (uMsg == WM_NCCREATE)
{
// get the pointer to the window from lpCreateParams which was set in CreateWindow
SetWindowLong(hwnd, GWL_USERDATA, (long)((LPCREATESTRUCT(lParam))->lpCreateParams));
}
// get the pointer to the window
pWnd = GetObjectFromWindow(hwnd);
// if we have the pointer, go to the message handler of the window
// else, use DefWindowProc
if (pWnd)
return pWnd->WinMsgHandler(hwnd, uMsg, wParam, lParam);
else
return DefWindowProc(hwnd, uMsg, wParam, lParam);
}
inline BOOL CWnd::Create()
{
// Create the window
RECT rect;
rect.top = 0;
rect.left = 0;
rect.right = 600;
rect.bottom = 400;
return Create(WS_OVERLAPPEDWINDOW | WS_VISIBLE, &rect);
}
inline BOOL CWnd::Create(DWORD dwStyles, RECT* rect)
{
// Create the window
// send the this pointer as the window creation parameter
m_hWnd = CreateWindow(m_sClassName, m_sWindowTitle, dwStyles, rect->left, rect->top,
rect->right - rect->left, rect->bottom - rect->top, NULL, NULL, m_hInstance,
(void *)this);
return (m_hWnd != NULL);
}
inline BOOL CWnd::CreateEx(DWORD dwExStyle, LPCTSTR lpszClassName,
LPCTSTR lpszWindowName, DWORD dwStyle, RECT& rect,
HWND hwndParent, HMENU nIDorHMenu, LPVOID lpParam)
{
if(HIWORD(lpszClassName))
m_sClassName = lpszClassName;
m_sWindowTitle = lpszWindowName;
m_hWnd = ::CreateWindowEx(dwExStyle, lpszClassName, lpszWindowName, dwStyle, rect.left, rect.top,
rect.right - rect.left, rect.bottom - rect.top, hwndParent, nIDorHMenu, m_hInstance, (void *)this);
return !!m_hWnd;
}
#endif