subclasswindow.cpp

来自「虚拟打印机」· C++ 代码 · 共 82 行

/*
 *
 * subclasswindow.cpp
 *
 *
   Copyright (C) 2006 Michael H. Overlin

   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   
   Contact at [e-mail]
 */

#include "subclasswindow.h"
#include "utils.h"

static TCHAR atstrProp[] = TEXT("RANdfoiu23132");

SubClassWindow::SubClassWindow(HINSTANCE hinst, HWND hwndTarget) :
	Window(hinst, hwndTarget)
{
	m_lpfnOldWndProc = (WNDPROC) ::GetWindowLongPtr(hwndTarget, GWL_WNDPROC);
	WNDPROC lpfn = (WNDPROC) Window::TheirWndProc<SubClassWindow>;
	::SetWindowLong(hwndTarget, GWL_WNDPROC, (LONG_PTR) lpfn);

	TheirInstallObjPtr(hwndTarget, this);
}

SubClassWindow::~SubClassWindow() {
	if (::IsWindow(m_hwnd)) {
		::SetWindowLongPtr(m_hwnd, GWL_WNDPROC, (LONG_PTR) m_lpfnOldWndProc);
	}
}

LRESULT SubClassWindow::DefWindowProc(UINT msg, WPARAM wParam, LPARAM lParam) {
	LRESULT lres = ::CallWindowProc(m_lpfnOldWndProc, m_hwnd, msg, wParam, lParam);
	return lres;
}

Window* SubClassWindow::TheirGetObjPtr(HWND hwnd) {
	Window *pw = (Window*) ::GetProp(hwnd, atstrProp);
	return pw;
}

void SubClassWindow::PaintMsg(OUT MSGRESULT& mr, UINT msg, WPARAM wParam, LPARAM lParam) {
	// DO NOTHING
}

void SubClassWindow::TheirInstallObjPtr(HWND hwnd, Window *pw) {
	::SetProp(hwnd, atstrProp, (HANDLE) pw);
}

void SubClassWindow::TheirRemoveObjPtr(HWND hwnd, Window *pw) {
	::SetProp(hwnd, atstrProp, (HANDLE) NULL);
}

LPCTSTR SubClassWindow::TheirGetWindowClassName(void) {
	// MAYBE THIS SHOULD RETURN INFO ON THE SUBCLASSED WINDOWS CLASS
	// IMPLEMENT LATER IF I EVER NEED IT
	ASSERTFAIL();
	return NULL;
}

void SubClassWindow::TheirGetClassInfo(OUT ::WNDCLASSEX & wcex, 
	IN HINSTANCE hinst, IN LPCTSTR lptstrClass, IN WNDPROC wndproc, IN DWORD dwcExtra) {

	// MAYBE THIS SHOULD RETURN INFO ON THE SUBCLASSED WINDOWS CLASS
	// IMPLEMENT LATER IF I EVER NEED IT
	ASSERTFAIL();
}