ash/touch/touch_observer_hud.cc

   1 // Copyright (c) 2012 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 "ash/touch/touch_observer_hud.h"
   6
   7 #include "ash/root_window_controller.h"
   8 #include "ash/root_window_settings.h"
   9 #include "ash/shell.h"
  10 #include "ash/shell_window_ids.h"
  11 #include "ui/aura/window_event_dispatcher.h"
  12 #include "ui/gfx/display.h"
  13 #include "ui/gfx/geometry/rect.h"
  14 #include "ui/gfx/geometry/size.h"
  15 #include "ui/gfx/screen.h"
  16 #include "ui/views/widget/widget.h"
  17
  18 namespace ash {
  19
  20 TouchObserverHUD::TouchObserverHUD(aura::Window* initial_root)
  21     : display_id_(GetRootWindowSettings(initial_root)->display_id),
  22       root_window_(initial_root),
  23       widget_(NULL) {
  24   const gfx::Display& display =
  25       Shell::GetInstance()->display_manager()->GetDisplayForId(display_id_);
  26
  27   views::View* content = new views::View;
  28
  29   const gfx::Size& display_size = display.size();
  30   content->SetSize(display_size);
  31
  32   widget_ = new views::Widget();
  33   views::Widget::InitParams
  34       params(views::Widget::InitParams::TYPE_WINDOW_FRAMELESS);
  35   params.opacity = views::Widget::InitParams::TRANSLUCENT_WINDOW;
  36   params.activatable = views::Widget::InitParams::ACTIVATABLE_NO;
  37   params.accept_events = false;
  38   params.bounds = display.bounds();
  39   params.parent =
  40       Shell::GetContainer(root_window_, kShellWindowId_OverlayContainer);
  41   widget_->Init(params);
  42   widget_->SetContentsView(content);
  43   widget_->StackAtTop();
  44   widget_->Show();
  45
  46   widget_->AddObserver(this);
  47
  48   // Observe changes in display size and mode to update touch HUD.
  49   Shell::GetScreen()->AddObserver(this);
  50 #if defined(OS_CHROMEOS)
  51   Shell::GetInstance()->display_configurator()->AddObserver(this);
  52 #endif  // defined(OS_CHROMEOS)
  53
  54   Shell::GetInstance()->display_controller()->AddObserver(this);
  55   root_window_->AddPreTargetHandler(this);
  56 }
  57
  58 TouchObserverHUD::~TouchObserverHUD() {
  59   Shell::GetInstance()->display_controller()->RemoveObserver(this);
  60
  61 #if defined(OS_CHROMEOS)
  62   Shell::GetInstance()->display_configurator()->RemoveObserver(this);
  63 #endif  // defined(OS_CHROMEOS)
  64   Shell::GetScreen()->RemoveObserver(this);
  65
  66   widget_->RemoveObserver(this);
  67 }
  68
  69 void TouchObserverHUD::Clear() {
  70 }
  71
  72 void TouchObserverHUD::Remove() {
  73   root_window_->RemovePreTargetHandler(this);
  74
  75   RootWindowController* controller = GetRootWindowController(root_window_);
  76   UnsetHudForRootWindowController(controller);
  77
  78   widget_->CloseNow();
  79 }
  80
  81 void TouchObserverHUD::OnTouchEvent(ui::TouchEvent* /*event*/) {
  82 }
  83
  84 void TouchObserverHUD::OnWidgetDestroying(views::Widget* widget) {
  85   DCHECK_EQ(widget, widget_);
  86   delete this;
  87 }
  88
  89 void TouchObserverHUD::OnDisplayAdded(const gfx::Display& new_display) {}
  90
  91 void TouchObserverHUD::OnDisplayRemoved(const gfx::Display& old_display) {
  92   if (old_display.id() != display_id_)
  93     return;
  94   widget_->CloseNow();
  95 }
  96
  97 void TouchObserverHUD::OnDisplayMetricsChanged(const gfx::Display& display,
  98                                                uint32_t metrics) {
  99   if (display.id() != display_id_ || !(metrics & DISPLAY_METRIC_BOUNDS))
 100     return;
 101
 102   widget_->SetSize(display.size());
 103 }
 104
 105 #if defined(OS_CHROMEOS)
 106 void TouchObserverHUD::OnDisplayModeChanged(
 107     const ui::DisplayConfigurator::DisplayStateList& outputs) {
 108   // Clear touch HUD for any change in display mode (single, dual extended, dual
 109   // mirrored, ...).
 110   Clear();
 111 }
 112 #endif  // defined(OS_CHROMEOS)
 113
 114 void TouchObserverHUD::OnDisplaysInitialized() {
 115   OnDisplayConfigurationChanged();
 116 }
 117
 118 void TouchObserverHUD::OnDisplayConfigurationChanging() {
 119   if (!root_window_)
 120     return;
 121
 122   root_window_->RemovePreTargetHandler(this);
 123
 124   RootWindowController* controller = GetRootWindowController(root_window_);
 125   UnsetHudForRootWindowController(controller);
 126
 127   views::Widget::ReparentNativeView(
 128       widget_->GetNativeView(),
 129       Shell::GetContainer(root_window_,
 130                           kShellWindowId_UnparentedControlContainer));
 131
 132   root_window_ = NULL;
 133 }
 134
 135 void TouchObserverHUD::OnDisplayConfigurationChanged() {
 136   if (root_window_)
 137     return;
 138
 139   root_window_ = Shell::GetInstance()->display_controller()->
 140       GetRootWindowForDisplayId(display_id_);
 141
 142   views::Widget::ReparentNativeView(
 143       widget_->GetNativeView(),
 144       Shell::GetContainer(root_window_, kShellWindowId_OverlayContainer));
 145
 146   RootWindowController* controller = GetRootWindowController(root_window_);
 147   SetHudForRootWindowController(controller);
 148
 149   root_window_->AddPreTargetHandler(this);
 150 }
 151
 152 }  // namespace ash