henrike@webrtc.org | 47be73b | 2014-05-13 18:00:26 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2004 The WebRTC Project Authors. All rights reserved. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license |
| 5 | * that can be found in the LICENSE file in the root of the source |
| 6 | * tree. An additional intellectual property rights grant can be found |
| 7 | * in the file PATENTS. All contributing project authors may |
| 8 | * be found in the AUTHORS file in the root of the source tree. |
| 9 | */ |
| 10 | |
| 11 | #include "webrtc/base/common.h" |
| 12 | #include "webrtc/base/logging.h" |
| 13 | #include "webrtc/base/win32window.h" |
| 14 | |
| 15 | namespace rtc { |
| 16 | |
| 17 | /////////////////////////////////////////////////////////////////////////////// |
| 18 | // Win32Window |
| 19 | /////////////////////////////////////////////////////////////////////////////// |
| 20 | |
| 21 | static const wchar_t kWindowBaseClassName[] = L"WindowBaseClass"; |
| 22 | HINSTANCE Win32Window::instance_ = NULL; |
| 23 | ATOM Win32Window::window_class_ = 0; |
| 24 | |
| 25 | Win32Window::Win32Window() : wnd_(NULL) { |
| 26 | } |
| 27 | |
| 28 | Win32Window::~Win32Window() { |
| 29 | ASSERT(NULL == wnd_); |
| 30 | } |
| 31 | |
| 32 | bool Win32Window::Create(HWND parent, const wchar_t* title, DWORD style, |
| 33 | DWORD exstyle, int x, int y, int cx, int cy) { |
| 34 | if (wnd_) { |
| 35 | // Window already exists. |
| 36 | return false; |
| 37 | } |
| 38 | |
| 39 | if (!window_class_) { |
| 40 | if (!GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS | |
| 41 | GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT, |
| 42 | reinterpret_cast<LPCWSTR>(&Win32Window::WndProc), |
| 43 | &instance_)) { |
| 44 | LOG_GLE(LS_ERROR) << "GetModuleHandleEx failed"; |
| 45 | return false; |
| 46 | } |
| 47 | |
| 48 | // Class not registered, register it. |
| 49 | WNDCLASSEX wcex; |
| 50 | memset(&wcex, 0, sizeof(wcex)); |
| 51 | wcex.cbSize = sizeof(wcex); |
| 52 | wcex.hInstance = instance_; |
| 53 | wcex.lpfnWndProc = &Win32Window::WndProc; |
| 54 | wcex.lpszClassName = kWindowBaseClassName; |
| 55 | window_class_ = ::RegisterClassEx(&wcex); |
| 56 | if (!window_class_) { |
| 57 | LOG_GLE(LS_ERROR) << "RegisterClassEx failed"; |
| 58 | return false; |
| 59 | } |
| 60 | } |
| 61 | wnd_ = ::CreateWindowEx(exstyle, kWindowBaseClassName, title, style, |
| 62 | x, y, cx, cy, parent, NULL, instance_, this); |
| 63 | return (NULL != wnd_); |
| 64 | } |
| 65 | |
| 66 | void Win32Window::Destroy() { |
| 67 | VERIFY(::DestroyWindow(wnd_) != FALSE); |
| 68 | } |
| 69 | |
| 70 | void Win32Window::Shutdown() { |
| 71 | if (window_class_) { |
| 72 | ::UnregisterClass(MAKEINTATOM(window_class_), instance_); |
| 73 | window_class_ = 0; |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | bool Win32Window::OnMessage(UINT uMsg, WPARAM wParam, LPARAM lParam, |
| 78 | LRESULT& result) { |
| 79 | switch (uMsg) { |
| 80 | case WM_CLOSE: |
| 81 | if (!OnClose()) { |
| 82 | result = 0; |
| 83 | return true; |
| 84 | } |
| 85 | break; |
| 86 | } |
| 87 | return false; |
| 88 | } |
| 89 | |
| 90 | LRESULT Win32Window::WndProc(HWND hwnd, UINT uMsg, |
| 91 | WPARAM wParam, LPARAM lParam) { |
| 92 | Win32Window* that = reinterpret_cast<Win32Window*>( |
| 93 | ::GetWindowLongPtr(hwnd, GWLP_USERDATA)); |
| 94 | if (!that && (WM_CREATE == uMsg)) { |
| 95 | CREATESTRUCT* cs = reinterpret_cast<CREATESTRUCT*>(lParam); |
| 96 | that = static_cast<Win32Window*>(cs->lpCreateParams); |
| 97 | that->wnd_ = hwnd; |
| 98 | ::SetWindowLongPtr(hwnd, GWLP_USERDATA, reinterpret_cast<LONG_PTR>(that)); |
| 99 | } |
| 100 | if (that) { |
| 101 | LRESULT result; |
| 102 | bool handled = that->OnMessage(uMsg, wParam, lParam, result); |
| 103 | if (WM_DESTROY == uMsg) { |
| 104 | for (HWND child = ::GetWindow(hwnd, GW_CHILD); child; |
| 105 | child = ::GetWindow(child, GW_HWNDNEXT)) { |
| 106 | LOG(LS_INFO) << "Child window: " << static_cast<void*>(child); |
| 107 | } |
| 108 | } |
| 109 | if (WM_NCDESTROY == uMsg) { |
| 110 | ::SetWindowLongPtr(hwnd, GWLP_USERDATA, NULL); |
| 111 | that->wnd_ = NULL; |
| 112 | that->OnNcDestroy(); |
| 113 | } |
| 114 | if (handled) { |
| 115 | return result; |
| 116 | } |
| 117 | } |
| 118 | return ::DefWindowProc(hwnd, uMsg, wParam, lParam); |
| 119 | } |
| 120 | |
| 121 | } // namespace rtc |