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