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 "base/compiler_specific.h" 9 #include "base/memory/scoped_ptr.h" 10 #include "ui/aura/window_observer.h" 11 #include "ui/gfx/rect.h" 12 #include "ui/views/controls/button/button.h" 13 14 namespace aura { 15 class Window; 16 } 17 18 namespace views { 19 class Label; 20 class Widget; 21 } 22 23 namespace ash { 24 class TransparentActivateWindowButton; 25 26 // This class represents an item in overview mode. An item can have one or more 27 // windows, of which only one can be activated by keyboard (i.e. alt+tab) but 28 // any can be selected with a pointer (touch or mouse). 29 class WindowSelectorItem : public views::ButtonListener, 30 public aura::WindowObserver { 31 public: 32 WindowSelectorItem(); 33 virtual ~WindowSelectorItem(); 34 35 // The time for the close buttons and labels to fade in when initially shown 36 // on entering overview mode. 37 static const int kFadeInMilliseconds; 38 39 // Returns the root window on which this item is shown. 40 virtual aura::Window* GetRootWindow() = 0; 41 42 // Returns true if the window selector item has |window| as a selectable 43 // window. 44 virtual bool HasSelectableWindow(const aura::Window* window) = 0; 45 46 // Returns true if |target| is contained in this WindowSelectorItem. 47 virtual bool Contains(const aura::Window* target) = 0; 48 49 // Restores |window| on exiting window overview rather than returning it 50 // to its previous state. 51 virtual void RestoreWindowOnExit(aura::Window* window) = 0; 52 53 // Returns the |window| to activate on selecting of this item. 54 virtual aura::Window* SelectionWindow() = 0; 55 56 // Removes |window| from this item. Check empty() after calling this to see 57 // if the entire item is now empty. 58 virtual void RemoveWindow(const aura::Window* window); 59 60 // Returns true if this item has no more selectable windows (i.e. after 61 // calling RemoveWindow for the last contained window). 62 virtual bool empty() const = 0; 63 64 // Dispatched before beginning window overview. This will do any necessary 65 // one time actions such as restoring minimized windows. 66 virtual void PrepareForOverview() = 0; 67 68 // Sets the bounds of this window selector item to |target_bounds| in the 69 // |root_window| root window. 70 void SetBounds(aura::Window* root_window, 71 const gfx::Rect& target_bounds, 72 bool animate); 73 74 // Recomputes the positions for the windows in this selection item. This is 75 // dispatched when the bounds of a window change. 76 void RecomputeWindowTransforms(); 77 78 // Sends an a11y focus alert so that, if chromevox is enabled, the window 79 // label is read. 80 void SendFocusAlert() const; 81 82 // Sets if the item is dimmed in the overview. Changing the value will also 83 // change the visibility of the transform windows. 84 virtual void SetDimmed(bool dimmed); 85 bool dimmed() const { return dimmed_; } 86 87 const gfx::Rect& bounds() const { return bounds_; } 88 const gfx::Rect& target_bounds() const { return target_bounds_; } 89 90 // views::ButtonListener: 91 virtual void ButtonPressed(views::Button* sender, 92 const ui::Event& event) OVERRIDE; 93 94 // aura::WindowObserver: 95 virtual void OnWindowTitleChanged(aura::Window* window) OVERRIDE; 96 97 protected: 98 // Sets the bounds of this selector's items to |target_bounds| in 99 // |root_window|. If |animate| the windows are animated from their current 100 // location. 101 virtual void SetItemBounds(aura::Window* root_window, 102 const gfx::Rect& target_bounds, 103 bool animate) = 0; 104 105 // Sets the bounds used by the selector item's windows. 106 void set_bounds(const gfx::Rect& bounds) { bounds_ = bounds; } 107 108 // Changes the opacity of all the windows the item owns. 109 virtual void SetOpacity(float opacity); 110 111 // True if the item is being shown in the overview, false if it's being 112 // filtered. 113 bool dimmed_; 114 115 private: 116 friend class WindowSelectorTest; 117 118 // Creates |close_button_| if it does not exist and updates the bounds based 119 // on GetCloseButtonTargetBounds() 120 void UpdateCloseButtonBounds(aura::Window* root_window, bool animate); 121 122 // Creates a label to display under the window selector item. 123 void UpdateWindowLabels(const gfx::Rect& target_bounds, 124 aura::Window* root_window, 125 bool animate); 126 127 // Initializes window_label_. 128 void CreateWindowLabel(const base::string16& title); 129 130 // The root window this item is being displayed on. 131 aura::Window* root_window_; 132 133 // The target bounds this selector item is fit within. 134 gfx::Rect target_bounds_; 135 136 // The actual bounds of the window(s) for this item. The aspect ratio of 137 // window(s) are maintained so they may not fill the target_bounds_. 138 gfx::Rect bounds_; 139 140 // True if running SetItemBounds. This prevents recursive calls resulting from 141 // the bounds update when calling ::wm::RecreateWindowLayers to copy 142 // a window layer for display on another monitor. 143 bool in_bounds_update_; 144 145 // Label under the window displaying its active tab name. 146 scoped_ptr<views::Widget> window_label_; 147 148 // View for the label under the window. 149 views::Label* window_label_view_; 150 151 // An easy to access close button for the window in this item. 152 scoped_ptr<views::Widget> close_button_; 153 154 // Transparent window on top of the real windows in the overview that 155 // activates them on click or tap. 156 scoped_ptr<TransparentActivateWindowButton> activate_window_button_; 157 158 DISALLOW_COPY_AND_ASSIGN(WindowSelectorItem); 159 }; 160 161 } // namespace ash 162 163 #endif // ASH_WM_OVERVIEW_WINDOW_SELECTOR_ITEM_H_ 164
