Relocate and refactor overview mode files.

ash/wm/window_selector.h

-// 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_WINDOW_SELECTOR_H_
-#define ASH_WM_WINDOW_SELECTOR_H_
-
-#include <vector>
-
-#include "base/compiler_specific.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/memory/scoped_vector.h"
-#include "ui/aura/window_observer.h"
-#include "ui/base/events/event_handler.h"
-#include "ui/gfx/transform.h"
-
-namespace aura {
-class RootWindow;
-}
-
-namespace ui {
-class LocatedEvent;
-}
-
-namespace views {
-class Widget;
-}
-
-namespace ash {
-
-class WindowSelectorDelegate;
-class WindowSelectorWindow;
-
-// The WindowSelector shows a grid of all of your windows and allows selecting
-// a window by clicking or tapping on it (OVERVIEW mode) or by alt-tabbing to
-// it (CYCLE mode).
-class WindowSelector : public ui::EventHandler,
-                       public aura::WindowObserver {
- 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);
-
-  // Select the current window.
-  void SelectWindow();
-
-  Mode mode() { return mode_; }
-
-  // ui::EventHandler:
-  virtual void OnEvent(ui::Event* event) OVERRIDE;
-  virtual void OnMouseEvent(ui::MouseEvent* event) OVERRIDE;
-  virtual void OnTouchEvent(ui::TouchEvent* event) OVERRIDE;
-
-  // aura::WindowObserver:
-  virtual void OnWindowDestroyed(aura::Window* window) OVERRIDE;
-
- private:
-  // Returns the target of |event| or NULL if the event is not targeted at
-  // any of the windows in the selector.
-  WindowSelectorWindow* GetEventTarget(ui::LocatedEvent* event);
-
-  // Handles a selection event for |target|.
-  void HandleSelectionEvent(WindowSelectorWindow* target);
-
-  // Position all of the windows based on the current selection mode.
-  void PositionWindows();
-  // Position all of the windows from |root_window| on |root_window|.
-  void PositionWindowsFromRoot(aura::RootWindow* root_window);
-  // Position all of the |windows| to fit on the |root_window|.
-  void PositionWindowsOnRoot(aura::RootWindow* root_window,
-                             const std::vector<WindowSelectorWindow*>& windows);
-
-  void InitializeSelectionWidget();
-
-  // Updates the selection widget's location to the currently selected window.
-  // If |animate| the transition to the new location is animated.
-  void UpdateSelectionLocation(bool animate);
-
-  // The collection of windows in the overview wrapped by a helper class which
-  // restores their state and helps transform them to other root windows.
-  ScopedVector<WindowSelectorWindow> windows_;
-
-  // The window selection mode.
-  Mode mode_;
-
-  // 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_;
-
-  // Widget indicating which window is currently selected.
-  scoped_ptr<views::Widget> selection_widget_;
-
-  // In CYCLE mode, the root window in which selection is taking place.
-  // NULL otherwise.
-  aura::RootWindow* selection_root_;
-
-  DISALLOW_COPY_AND_ASSIGN(WindowSelector);
-};
-
-}  // namespace ash
-
-#endif  // ASH_WM_WINDOW_SELECTOR_H_