ash/wm/overview/window_selector_controller.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_CONTROLLER_H_
   6 #define ASH_WM_OVERVIEW_WINDOW_SELECTOR_CONTROLLER_H_
   7
   8 #include <list>
   9 #include <vector>
  10
  11 #include "ash/ash_export.h"
  12 #include "ash/wm/overview/window_selector.h"
  13 #include "ash/wm/overview/window_selector_delegate.h"
  14 #include "base/basictypes.h"
  15 #include "base/memory/scoped_ptr.h"
  16 #include "base/time/time.h"
  17 #include "ui/aura/window_observer.h"
  18
  19 namespace aura {
  20 class Window;
  21 }
  22
  23 namespace ash {
  24
  25 namespace internal {
  26 class WindowSelectorTest;
  27 }
  28
  29 class WindowSelector;
  30
  31 // Manages a window selector which displays an overview of all windows and
  32 // allows selecting a window to activate it.
  33 class ASH_EXPORT WindowSelectorController
  34     : public WindowSelectorDelegate {
  35  public:
  36   WindowSelectorController();
  37   virtual ~WindowSelectorController();
  38
  39   // Returns true if selecting windows in an overview is enabled. This is false
  40   // at certain times, such as when the lock screen is visible.
  41   static bool CanSelect();
  42
  43   // Enters overview mode. This is essentially the window cycling mode however
  44   // not released on releasing the alt key and allows selecting with the mouse
  45   // or touch rather than keypresses.
  46   void ToggleOverview();
  47
  48   // Cycles between windows in the given |direction|. It is assumed that the
  49   // alt key is held down and a key filter is installed to watch for alt being
  50   // released.
  51   void HandleCycleWindow(WindowSelector::Direction direction);
  52
  53   // Returns true if window selection mode is active.
  54   bool IsSelecting();
  55
  56   // WindowSelectorDelegate:
  57   virtual void OnWindowSelected(aura::Window* window) OVERRIDE;
  58   virtual void OnSelectionCanceled() OVERRIDE;
  59
  60  private:
  61   friend class internal::WindowSelectorTest;
  62
  63   // Dispatched when window selection begins.
  64   void OnSelectionStarted();
  65
  66   scoped_ptr<WindowSelector> window_selector_;
  67   base::Time last_selection_time_;
  68
  69   DISALLOW_COPY_AND_ASSIGN(WindowSelectorController);
  70 };
  71
  72 }  // namespace ash
  73
  74 #endif  // ASH_WM_OVERVIEW_WINDOW_SELECTOR_CONTROLLER_H_