| // Copyright 2013 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef ASH_WM_OVERVIEW_WINDOW_SELECTOR_H_ |
| #define ASH_WM_OVERVIEW_WINDOW_SELECTOR_H_ |
| |
| #include <set> |
| #include <vector> |
| |
| #include "ash/ash_export.h" |
| #include "base/compiler_specific.h" |
| #include "base/memory/scoped_ptr.h" |
| #include "base/memory/scoped_vector.h" |
| #include "base/timer/timer.h" |
| #include "ui/aura/client/activation_change_observer.h" |
| #include "ui/aura/window_observer.h" |
| |
| namespace aura { |
| class RootWindow; |
| } |
| |
| namespace ui { |
| class EventHandler; |
| } |
| |
| namespace ash { |
| |
| namespace internal { |
| class WindowSelectorTest; |
| } |
| |
| class ScopedShowWindow; |
| class WindowOverview; |
| class WindowSelectorDelegate; |
| class WindowSelectorItem; |
| |
| // The WindowSelector allows selecting a window by alt-tabbing (CYCLE mode) or |
| // by clicking or tapping on it (OVERVIEW mode). A WindowOverview will be shown |
| // in OVERVIEW mode or if the user lingers on a window while alt tabbing. |
| class ASH_EXPORT WindowSelector |
| : public aura::WindowObserver, |
| public aura::client::ActivationChangeObserver { |
| public: |
| enum Direction { |
| FORWARD, |
| BACKWARD |
| }; |
| enum Mode { |
| CYCLE, |
| OVERVIEW |
| }; |
| |
| typedef std::vector<aura::Window*> WindowList; |
| |
| WindowSelector(const WindowList& windows, |
| Mode mode, |
| WindowSelectorDelegate* delegate); |
| virtual ~WindowSelector(); |
| |
| // Step to the next window in |direction|. |
| void Step(Direction direction); |
| |
| // Choose the currently selected window. |
| void SelectWindow(); |
| |
| // Choose |window| from the available windows to select. |
| void SelectWindow(aura::Window* window); |
| |
| // Cancels window selection. |
| void CancelSelection(); |
| |
| Mode mode() { return mode_; } |
| |
| // aura::WindowObserver: |
| virtual void OnWindowAdded(aura::Window* new_window) OVERRIDE; |
| virtual void OnWindowBoundsChanged(aura::Window* window, |
| const gfx::Rect& old_bounds, |
| const gfx::Rect& new_bounds) OVERRIDE; |
| virtual void OnWindowDestroying(aura::Window* window) OVERRIDE; |
| |
| // Overridden from aura::client::ActivationChangeObserver: |
| virtual void OnWindowActivated(aura::Window* gained_active, |
| aura::Window* lost_active) OVERRIDE; |
| virtual void OnAttemptToReactivateWindow( |
| aura::Window* request_active, |
| aura::Window* actual_active) OVERRIDE; |
| |
| private: |
| friend class internal::WindowSelectorTest; |
| |
| // Begins positioning windows such that all windows are visible on the screen. |
| void StartOverview(); |
| |
| // Resets the stored window from RemoveFocusAndSetRestoreWindow to NULL. If |
| // |focus|, restores focus to the stored window. |
| void ResetFocusRestoreWindow(bool focus); |
| |
| // The collection of items in the overview wrapped by a helper class which |
| // restores their state and helps transform them to other root windows. |
| ScopedVector<WindowSelectorItem> windows_; |
| |
| // Tracks observed windows. |
| std::set<aura::Window*> observed_windows_; |
| |
| // The window selection mode. |
| Mode mode_; |
| |
| // An event handler listening for the release of the alt key during alt-tab |
| // cycling. |
| scoped_ptr<ui::EventHandler> event_handler_; |
| |
| // The currently selected window being shown (temporarily brought to the front |
| // of the stacking order and made visible). |
| scoped_ptr<ScopedShowWindow> showing_window_; |
| |
| bool timer_enabled_; |
| base::DelayTimer<WindowSelector> start_overview_timer_; |
| scoped_ptr<WindowOverview> window_overview_; |
| |
| // The time when window cycling was started. |
| base::Time cycle_start_time_; |
| |
| // Weak pointer to the selector delegate which will be called when a |
| // selection is made. |
| WindowSelectorDelegate* delegate_; |
| |
| // Index of the currently selected window if the mode is CYCLE. |
| size_t selected_window_; |
| |
| // A weak pointer to the window which was focused on beginning window |
| // selection. If window selection is canceled the focus should be restored to |
| // this window. |
| aura::Window* restore_focus_window_; |
| |
| // True when performing operations that may cause window activations. This is |
| // used to prevent handling the resulting expected activation. |
| bool ignore_activations_; |
| |
| DISALLOW_COPY_AND_ASSIGN(WindowSelector); |
| }; |
| |
| } // namespace ash |
| |
| #endif // ASH_WM_OVERVIEW_WINDOW_SELECTOR_H_ |