1 /*
2 * libjingle
3 * Copyright 2004--2005, Google Inc.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright notice,
9 * this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright notice,
11 * this list of conditions and the following disclaimer in the documentation
12 * and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28 #include "talk/base/common.h"
29 #include "talk/base/logging.h"
30 #include "talk/base/win32window.h"
31
32 namespace talk_base {
33
34 ///////////////////////////////////////////////////////////////////////////////
35 // Win32Window
36 ///////////////////////////////////////////////////////////////////////////////
37
38 static const wchar_t kWindowBaseClassName[] = L"WindowBaseClass";
39 HINSTANCE Win32Window::instance_ = GetModuleHandle(NULL);
40 ATOM Win32Window::window_class_ = 0;
41
Win32Window()42 Win32Window::Win32Window() : wnd_(NULL) {
43 }
44
~Win32Window()45 Win32Window::~Win32Window() {
46 ASSERT(NULL == wnd_);
47 }
48
Create(HWND parent,const wchar_t * title,DWORD style,DWORD exstyle,int x,int y,int cx,int cy)49 bool Win32Window::Create(HWND parent, const wchar_t* title, DWORD style,
50 DWORD exstyle, int x, int y, int cx, int cy) {
51 if (wnd_) {
52 // Window already exists.
53 return false;
54 }
55
56 if (!window_class_) {
57 // Class not registered, register it.
58 WNDCLASSEX wcex;
59 memset(&wcex, 0, sizeof(wcex));
60 wcex.cbSize = sizeof(wcex);
61 wcex.hInstance = instance_;
62 wcex.lpfnWndProc = &Win32Window::WndProc;
63 wcex.lpszClassName = kWindowBaseClassName;
64 window_class_ = ::RegisterClassEx(&wcex);
65 if (!window_class_) {
66 LOG_GLE(LS_ERROR) << "RegisterClassEx failed";
67 return false;
68 }
69 }
70 wnd_ = ::CreateWindowEx(exstyle, kWindowBaseClassName, title, style,
71 x, y, cx, cy, parent, NULL, instance_, this);
72 return (NULL != wnd_);
73 }
74
Destroy()75 void Win32Window::Destroy() {
76 VERIFY(::DestroyWindow(wnd_) != FALSE);
77 }
78
SetInstance(HINSTANCE instance)79 void Win32Window::SetInstance(HINSTANCE instance) {
80 instance_ = instance;
81 }
82
Shutdown()83 void Win32Window::Shutdown() {
84 if (window_class_) {
85 ::UnregisterClass(MAKEINTATOM(window_class_), instance_);
86 window_class_ = 0;
87 }
88 }
89
OnMessage(UINT uMsg,WPARAM wParam,LPARAM lParam,LRESULT & result)90 bool Win32Window::OnMessage(UINT uMsg, WPARAM wParam, LPARAM lParam,
91 LRESULT& result) {
92 switch (uMsg) {
93 case WM_CLOSE:
94 if (!OnClose()) {
95 result = 0;
96 return true;
97 }
98 break;
99 }
100 return false;
101 }
102
WndProc(HWND hwnd,UINT uMsg,WPARAM wParam,LPARAM lParam)103 LRESULT Win32Window::WndProc(HWND hwnd, UINT uMsg,
104 WPARAM wParam, LPARAM lParam) {
105 Win32Window* that = reinterpret_cast<Win32Window*>(
106 ::GetWindowLongPtr(hwnd, GWL_USERDATA));
107 if (!that && (WM_CREATE == uMsg)) {
108 CREATESTRUCT* cs = reinterpret_cast<CREATESTRUCT*>(lParam);
109 that = static_cast<Win32Window*>(cs->lpCreateParams);
110 that->wnd_ = hwnd;
111 ::SetWindowLongPtr(hwnd, GWL_USERDATA, reinterpret_cast<LONG_PTR>(that));
112 }
113 if (that) {
114 LRESULT result;
115 bool handled = that->OnMessage(uMsg, wParam, lParam, result);
116 if (WM_DESTROY == uMsg) {
117 for (HWND child = ::GetWindow(hwnd, GW_CHILD); child;
118 child = ::GetWindow(child, GW_HWNDNEXT)) {
119 LOG(LS_INFO) << "Child window: " << static_cast<void*>(child);
120 }
121 }
122 if (WM_NCDESTROY == uMsg) {
123 ::SetWindowLongPtr(hwnd, GWL_USERDATA, NULL);
124 that->wnd_ = NULL;
125 that->OnDestroyed();
126 }
127 if (handled) {
128 return result;
129 }
130 }
131 return ::DefWindowProc(hwnd, uMsg, wParam, lParam);
132 }
133
134 } // namespace talk_base
135