Index: athena/wm/split_view_controller.h |
diff --git a/athena/wm/split_view_controller.h b/athena/wm/split_view_controller.h |
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--- a/athena/wm/split_view_controller.h |
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-// Copyright 2014 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 ATHENA_WM_SPLIT_VIEW_CONTROLLER_H_ |
-#define ATHENA_WM_SPLIT_VIEW_CONTROLLER_H_ |
- |
-#include "athena/athena_export.h" |
-#include "athena/util/drag_handle.h" |
-#include "athena/wm/public/window_list_provider_observer.h" |
-#include "athena/wm/public/window_manager_observer.h" |
-#include "base/memory/scoped_ptr.h" |
-#include "base/memory/weak_ptr.h" |
- |
-namespace gfx { |
-class Rect; |
-class Transform; |
-} |
- |
-namespace aura { |
-class ScopedWindowTargeter; |
-class Window; |
-class WindowTargeter; |
-} |
- |
-namespace views { |
-class ViewTargeterDelegate; |
-class Widget; |
-} |
- |
-namespace athena { |
-class SplitViewControllerTest; |
-class WindowListProviderImpl; |
- |
-// Responsible for entering split view mode, exiting from split view mode, and |
-// laying out the windows in split view mode. |
-class ATHENA_EXPORT SplitViewController |
- : public DragHandleScrollDelegate, |
- public WindowManagerObserver, |
- public WindowListProviderObserver { |
- public: |
- SplitViewController(aura::Window* container, |
- WindowListProviderImpl* window_list_provider); |
- |
- ~SplitViewController() override; |
- |
- bool CanActivateSplitViewMode() const; |
- bool IsSplitViewModeActive() const; |
- |
- // Activates split-view mode with |left| and |right| windows. If |left| and/or |
- // |right| is nullptr, then the first window in the window-list (which is |
- // neither |
- // |left| nor |right|) is selected instead. |to_activate| indicates which of |
- // |left| or |right| should be activated. If |to_activate| is nullptr, the |
- // currently active window is kept active if it is one of the split-view |
- // windows. |
- void ActivateSplitMode(aura::Window* left, |
- aura::Window* right, |
- aura::Window* to_activate); |
- |
- // Resets the internal state to an inactive state. |
- void DeactivateSplitMode(); |
- |
- // Replaces |window| in split-view mode with |replace_with|. Adjusts |
- // |replace_with|'s visibility, transform and bounds. Resets |window|'s |
- // visibility and transform but does not change its bounds. |
- void ReplaceWindow(aura::Window* window, |
- aura::Window* replace_with); |
- |
- // Returns the bounds of the left and right parts of the |container_| based |
- // on the current value of |divider_position_|. |
- gfx::Rect GetLeftAreaBounds(); |
- gfx::Rect GetRightAreaBounds(); |
- |
- aura::Window* left_window() { return left_window_; } |
- aura::Window* right_window() { return right_window_; } |
- |
- private: |
- friend class SplitViewControllerTest; |
- |
- enum State { |
- // Split View mode is not active. |left_window_| and |right_window| are |
- // nullptr. |
- INACTIVE, |
- // Two windows |left_window_| and |right_window| are shown side by side and |
- // there is a horizontal scroll in progress which is dragging the divider |
- // between the two windows. |
- SCROLLING, |
- // Split View mode is active with |left_window_| and |right_window| showing |
- // side by side each occupying half the screen. No scroll in progress. |
- ACTIVE |
- }; |
- |
- void SetState(State state); |
- |
- void InitializeDivider(); |
- void HideDivider(); |
- void ShowDivider(); |
- |
- void UpdateLayout(bool animate); |
- |
- void SetWindowTransforms(const gfx::Transform& left_transform, |
- const gfx::Transform& right_transform, |
- const gfx::Transform& divider_transform, |
- bool animate); |
- |
- // Called when the animation initiated by SetWindowTransforms() completes. |
- void OnAnimationCompleted(); |
- |
- // Returns the default divider position for when the split view mode is |
- // active and the divider is not being dragged. |
- int GetDefaultDividerPosition(); |
- |
- // Access to constants in anonymous namespace for testing purposes. |
- float GetMaxDistanceFromMiddleForTest() const; |
- float GetMinFlingVelocityForTest() const; |
- |
- // DragHandleScrollDelegate: |
- void HandleScrollBegin(float delta) override; |
- void HandleScrollEnd(float velocity) override; |
- void HandleScrollUpdate(float delta) override; |
- |
- // WindowManagerObserver: |
- void OnOverviewModeEnter() override; |
- void OnOverviewModeExit() override; |
- void OnSplitViewModeEnter() override; |
- void OnSplitViewModeExit() override; |
- |
- // WindowListProviderObserver: |
- void OnWindowStackingChangedInList() override {} |
- void OnWindowAddedToList(aura::Window* added_window) override; |
- void OnWindowRemovedFromList(aura::Window* removed_window, |
- int index) override; |
- |
- State state_; |
- |
- aura::Window* container_; |
- |
- // Provider of the list of windows to cycle through. Not owned. |
- WindowListProviderImpl* window_list_provider_; |
- |
- // Windows for the left and right activities shown in SCROLLING and ACTIVE |
- // states. In INACTIVE state these are nullptr. |
- aura::Window* left_window_; |
- aura::Window* right_window_; |
- |
- // X-Coordinate of the (center of the) divider between left_window_ and |
- // right_window_ in |container_| coordinates. |
- int divider_position_; |
- |
- // Meaningful only when state_ is SCROLLING. |
- // X-Coordinate of the divider when the scroll started. |
- int divider_scroll_start_position_; |
- |
- // Visually separates the windows and contains the drag handle. |
- views::Widget* divider_widget_; |
- |
- // The drag handle which can be used when split view is active to exit the |
- // split view mode. |
- views::View* drag_handle_; |
- |
- scoped_ptr<aura::ScopedWindowTargeter> window_targeter_; |
- scoped_ptr<views::ViewTargeterDelegate> view_targeter_delegate_; |
- |
- // Windows which should be hidden when the animation initiated by |
- // UpdateLayout() completes. |
- std::vector<aura::Window*> to_hide_; |
- |
- base::WeakPtrFactory<SplitViewController> weak_factory_; |
- |
- DISALLOW_COPY_AND_ASSIGN(SplitViewController); |
-}; |
- |
-} // namespace athena |
- |
-#endif // ATHENA_WM_SPLIT_VIEW_CONTROLLER_H_ |