ash/wm/overview/transparent_activate_window_button.cc

   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 "ash/wm/overview/transparent_activate_window_button.h"
   6
   7 #include "ash/shell.h"
   8 #include "ash/shell_window_ids.h"
   9 #include "ash/wm/window_state.h"
  10 #include "ui/views/controls/button/custom_button.h"
  11 #include "ui/views/widget/widget.h"
  12
  13 namespace ash {
  14
  15 namespace {
  16
  17 // Transparent button that handles events which activate windows in overview
  18 // mode.
  19 class TransparentButton : public views::CustomButton {
  20  public:
  21   explicit TransparentButton(views::ButtonListener* listener)
  22       : CustomButton(listener) {
  23   }
  24   virtual ~TransparentButton() {}
  25
  26  private:
  27   DISALLOW_COPY_AND_ASSIGN(TransparentButton);
  28 };
  29
  30 // Initializes the event handler transparent window.
  31 views::Widget* InitEventHandler(aura::Window* root_window) {
  32   views::Widget* widget = new views::Widget;
  33   views::Widget::InitParams params;
  34   params.type = views::Widget::InitParams::TYPE_POPUP;
  35   params.ownership = views::Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
  36   params.opacity = views::Widget::InitParams::TRANSLUCENT_WINDOW;
  37   params.accept_events = true;
  38   params.parent = Shell::GetContainer(root_window,
  39                                       ash::kShellWindowId_OverlayContainer);
  40   widget->set_focus_on_creation(false);
  41   widget->Init(params);
  42   widget->Show();
  43
  44   aura::Window* handler = widget->GetNativeWindow();
  45   handler->parent()->StackChildAtBottom(handler);
  46
  47   return widget;
  48 }
  49
  50 }  // namespace
  51
  52 TransparentActivateWindowButton::TransparentActivateWindowButton(
  53     aura::Window* activate_window)
  54     : event_handler_widget_(InitEventHandler(activate_window->GetRootWindow())),
  55       activate_window_(activate_window) {
  56   views::Button* transparent_button = new TransparentButton(this);
  57   transparent_button->SetAccessibleName(activate_window->title());
  58   event_handler_widget_->SetContentsView(transparent_button);
  59 }
  60
  61 void TransparentActivateWindowButton::SetBounds(const gfx::Rect& bounds) {
  62   event_handler_widget_->SetBounds(bounds);
  63 }
  64
  65 void TransparentActivateWindowButton::SendFocusAlert() const {
  66   event_handler_widget_->GetContentsView()->
  67       NotifyAccessibilityEvent(ui::AX_EVENT_FOCUS, true);
  68 }
  69
  70 TransparentActivateWindowButton::~TransparentActivateWindowButton() {
  71 }
  72
  73 void TransparentActivateWindowButton::ButtonPressed(views::Button* sender,
  74                                                     const ui::Event& event) {
  75   wm::GetWindowState(activate_window_)->Activate();
  76 }
  77
  78 }  // namespace ash