ash/wm/overview/window_selector_item.h

   1 // Copyright 2013 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 #ifndef ASH_WM_OVERVIEW_WINDOW_SELECTOR_ITEM_H_
   6 #define ASH_WM_OVERVIEW_WINDOW_SELECTOR_ITEM_H_
   7
   8 #include "ash/ash_export.h"
   9 #include "ash/wm/overview/scoped_transform_overview_window.h"
  10 #include "base/compiler_specific.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "ui/aura/scoped_window_targeter.h"
  13 #include "ui/aura/window_observer.h"
  14 #include "ui/gfx/geometry/rect.h"
  15 #include "ui/views/controls/button/button.h"
  16 #include "ui/views/controls/button/image_button.h"
  17 #include "ui/views/controls/button/label_button.h"
  18
  19 namespace aura {
  20 class Window;
  21 }
  22
  23 namespace views {
  24 class LabelButton;
  25 class Widget;
  26 }
  27
  28 namespace ash {
  29
  30 class WindowSelector;
  31
  32 // This class represents an item in overview mode.
  33 class ASH_EXPORT WindowSelectorItem : public views::ButtonListener,
  34                                       public aura::WindowObserver {
  35  public:
  36   class OverviewLabelButton : public views::LabelButton {
  37    public:
  38     OverviewLabelButton(views::ButtonListener* listener,
  39                         const base::string16& text);
  40
  41     ~OverviewLabelButton() override;
  42
  43     void set_top_padding(int top_padding) { top_padding_ = top_padding; }
  44
  45    protected:
  46     // views::LabelButton:
  47     gfx::Rect GetChildAreaBounds() override;
  48
  49    private:
  50     // Padding on top of the button.
  51     int top_padding_;
  52
  53     DISALLOW_COPY_AND_ASSIGN(OverviewLabelButton);
  54   };
  55
  56   WindowSelectorItem(aura::Window* window, WindowSelector* window_selector);
  57   ~WindowSelectorItem() override;
  58
  59   aura::Window* GetWindow();
  60
  61   // Returns the root window on which this item is shown.
  62   aura::Window* root_window() { return root_window_; }
  63
  64   // Returns true if |target| is contained in this WindowSelectorItem.
  65   bool Contains(const aura::Window* target) const;
  66
  67   // Restores and animates the managed window to it's non overview mode state.
  68   void RestoreWindow();
  69
  70   // Forces the managed window to be shown (ie not hidden or minimized) when
  71   // calling RestoreWindow().
  72   void ShowWindowOnExit();
  73
  74   // Dispatched before beginning window overview. This will do any necessary
  75   // one time actions such as restoring minimized windows.
  76   void PrepareForOverview();
  77
  78   // Sets the bounds of this window selector item to |target_bounds| in the
  79   // |root_window_| root window. The bounds change will be animated as specified
  80   // by |animation_type|.
  81   void SetBounds(const gfx::Rect& target_bounds,
  82                  OverviewAnimationType animation_type);
  83
  84   // Recomputes the positions for the windows in this selection item. This is
  85   // dispatched when the bounds of a window change.
  86   void RecomputeWindowTransforms();
  87
  88   // Sends an a11y focus alert so that, if chromevox is enabled, the window
  89   // label is read.
  90   void SendFocusAlert() const;
  91
  92   // Sets if the item is dimmed in the overview. Changing the value will also
  93   // change the visibility of the transform windows.
  94   void SetDimmed(bool dimmed);
  95   bool dimmed() const { return dimmed_; }
  96
  97   const gfx::Rect& target_bounds() const { return target_bounds_; }
  98
  99   // views::ButtonListener:
 100   void ButtonPressed(views::Button* sender, const ui::Event& event) override;
 101
 102   // aura::WindowObserver:
 103   void OnWindowDestroying(aura::Window* window) override;
 104   void OnWindowTitleChanged(aura::Window* window) override;
 105
 106  private:
 107   friend class WindowSelectorTest;
 108
 109   // Sets the bounds of this selector's items to |target_bounds| in
 110   // |root_window_|. The bounds change will be animated as specified
 111   // by |animation_type|.
 112   void SetItemBounds(const gfx::Rect& target_bounds,
 113                      OverviewAnimationType animation_type);
 114
 115   // Changes the opacity of all the windows the item owns.
 116   void SetOpacity(float opacity);
 117
 118   // Updates the window label bounds.
 119   void UpdateWindowLabel(const gfx::Rect& window_bounds,
 120                          OverviewAnimationType animation_type);
 121
 122   // Creates the window label.
 123   void CreateWindowLabel(const base::string16& title);
 124
 125   // Updates the close button's bounds. Any change in bounds will be animated
 126   // from the current bounds to the new bounds as per the |animation_type|.
 127   void UpdateCloseButtonLayout(OverviewAnimationType animation_type);
 128
 129   // Updates the close buttons accessibility name.
 130   void UpdateCloseButtonAccessibilityName();
 131
 132   // True if the item is being shown in the overview, false if it's being
 133   // filtered.
 134   bool dimmed_;
 135
 136   // The root window this item is being displayed on.
 137   aura::Window* root_window_;
 138
 139   // The contained Window's wrapper.
 140   ScopedTransformOverviewWindow transform_window_;
 141
 142   // The target bounds this selector item is fit within.
 143   gfx::Rect target_bounds_;
 144
 145   // True if running SetItemBounds. This prevents recursive calls resulting from
 146   // the bounds update when calling ::wm::RecreateWindowLayers to copy
 147   // a window layer for display on another monitor.
 148   bool in_bounds_update_;
 149
 150   // Label under the window displaying its active tab name.
 151   scoped_ptr<views::Widget> window_label_;
 152
 153   // View for the label under the window.
 154   OverviewLabelButton* window_label_button_view_;
 155
 156   // The close buttons widget container.
 157   views::Widget close_button_widget_;
 158
 159   // An easy to access close button for the window in this item. Owned by the
 160   // close_button_widget_.
 161   views::ImageButton* close_button_;
 162
 163   // Pointer to the WindowSelector that owns the WindowGrid containing |this|.
 164   // Guaranteed to be non-null for the lifetime of |this|.
 165   WindowSelector* window_selector_;
 166
 167   DISALLOW_COPY_AND_ASSIGN(WindowSelectorItem);
 168 };
 169
 170 }  // namespace ash
 171
 172 #endif  // ASH_WM_OVERVIEW_WINDOW_SELECTOR_ITEM_H_