app_window_desktop_window_tree_host_win.cc revision 5c02ac1a9c1b504631c0a3d2b6e737b5d738bae1 
1// Copyright 2014 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "chrome/browser/ui/views/apps/app_window_desktop_window_tree_host_win.h"
6
7#include <dwmapi.h>
8
9#include "chrome/browser/ui/views/apps/chrome_native_app_window_views_win.h"
10#include "chrome/browser/ui/views/apps/glass_app_window_frame_view_win.h"
11#include "grit/theme_resources.h"
12#include "ui/base/theme_provider.h"
13#include "ui/gfx/win/dpi.h"
14#include "ui/views/controls/menu/native_menu_win.h"
15
16#pragma comment(lib, "dwmapi.lib")
17
18AppWindowDesktopWindowTreeHostWin::AppWindowDesktopWindowTreeHostWin(
19    ChromeNativeAppWindowViewsWin* app_window,
20    views::DesktopNativeWidgetAura* desktop_native_widget_aura)
21    : DesktopWindowTreeHostWin(app_window->widget(),
22                               desktop_native_widget_aura),
23      app_window_(app_window) {
24}
25
26AppWindowDesktopWindowTreeHostWin::~AppWindowDesktopWindowTreeHostWin() {
27}
28
29bool AppWindowDesktopWindowTreeHostWin::GetClientAreaInsets(
30    gfx::Insets* insets) const {
31  // Use the default client insets for an opaque frame or a glass popup/app
32  // frame.
33  if (!app_window_->glass_frame_view())
34    return false;
35
36  // This tells Windows that the whole of the window is a client area, meaning
37  // Chrome will draw it. Windows still fills in the glass bits because of the
38  // DwmExtendFrameIntoClientArea call in |UpdateDWMFrame|.
39  insets->Set(0, 0, 0, 0);
40  return true;
41}
42
43void AppWindowDesktopWindowTreeHostWin::HandleFrameChanged() {
44  // We need to update the glass region on or off before the base class adjusts
45  // the window region.
46  UpdateDWMFrame();
47  DesktopWindowTreeHostWin::HandleFrameChanged();
48}
49
50void AppWindowDesktopWindowTreeHostWin::PostHandleMSG(UINT message,
51                                                      WPARAM w_param,
52                                                      LPARAM l_param) {
53  switch (message) {
54    case WM_WINDOWPOSCHANGED: {
55      UpdateDWMFrame();
56      break;
57    }
58  }
59}
60
61void AppWindowDesktopWindowTreeHostWin::UpdateDWMFrame() {
62  if (!GetWidget()->client_view() || !app_window_->glass_frame_view())
63    return;
64
65  MARGINS margins = {0};
66
67  // If the opaque frame is visible, we use the default (zero) margins.
68  // Otherwise, we need to figure out how to extend the glass in.
69  if (app_window_->glass_frame_view()) {
70    gfx::Insets insets = app_window_->glass_frame_view()->GetGlassInsets();
71    margins.cxLeftWidth = insets.left();
72    margins.cxRightWidth = insets.right();
73    margins.cyBottomHeight = insets.bottom();
74    margins.cyTopHeight = insets.top();
75  }
76
77  DwmExtendFrameIntoClientArea(GetHWND(), &margins);
78}
79