| // Copyright (c) 2012 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_RESIZE_SHADOW_CONTROLLER_H_ |
| #define ASH_WM_RESIZE_SHADOW_CONTROLLER_H_ |
| |
| #include "ash/ash_export.h" |
| #include "base/containers/flat_map.h" |
| #include "base/scoped_multi_source_observation.h" |
| #include "ui/aura/window.h" |
| #include "ui/aura/window_observer.h" |
| #include "ui/base/hit_test.h" |
| #include "ui/gfx/color_palette.h" |
| |
| namespace ash { |
| class ResizeShadow; |
| enum class ResizeShadowType; |
| |
| // ResizeShadowController observes changes to resizable windows and shows |
| // a resize handle visual effect when the cursor is near the edges. |
| class ASH_EXPORT ResizeShadowController : public aura::WindowObserver { |
| public: |
| ResizeShadowController(); |
| ResizeShadowController(const ResizeShadowController&) = delete; |
| ResizeShadowController& operator=(const ResizeShadowController&) = delete; |
| ~ResizeShadowController() override; |
| |
| // Shows the appropriate shadow for a given |window| and |hit_test| location. |
| // If the |window| is invisible, the shadow will not shown. |
| void ShowShadow(aura::Window* window, int hit_test = HTNOWHERE); |
| |
| // Shows all shadows. |
| void TryShowAllShadows(); |
| |
| // Hides the shadow for a |window|, if it has one. |
| void HideShadow(aura::Window* window); |
| |
| // Hides all shadows. |
| void HideAllShadows(); |
| |
| // aura::WindowObserver: |
| void OnWindowHierarchyChanged(const HierarchyChangeParams& params) override; |
| void OnWindowVisibilityChanging(aura::Window* window, bool visible) override; |
| void OnWindowBoundsChanged(aura::Window* window, |
| const gfx::Rect& old_bounds, |
| const gfx::Rect& new_bounds, |
| ui::PropertyChangeReason reason) override; |
| void OnWindowStackingChanged(aura::Window* window) override; |
| void OnWindowDestroying(aura::Window* window) override; |
| void OnWindowPropertyChanged(aura::Window* window, |
| const void* key, |
| intptr_t old) override; |
| |
| void UpdateResizeShadowBoundsOfWindow(aura::Window* window, |
| const gfx::Rect& bounds); |
| |
| ResizeShadow* GetShadowForWindowForTest(aura::Window* window); |
| |
| private: |
| // Removes all shadows. |
| void RemoveAllShadows(); |
| |
| // Recreates a shadow for a given |window| and the type from the |window|'s |
| // property if there's no shadow registered or it has one but its type is |
| // different. |window_shadows_| owns the memory. |
| void RecreateShadowIfNeeded(aura::Window* window); |
| |
| // Returns the resize shadow for |window| or NULL if no shadow exists. |
| ResizeShadow* GetShadowForWindow(aura::Window* window) const; |
| |
| // Update shadow visibility for a given |window|. |
| void UpdateShadowVisibility(aura::Window* window, bool visible) const; |
| bool ShouldShowShadowForWindow(aura::Window* window) const; |
| |
| base::flat_map<aura::Window*, std::unique_ptr<ResizeShadow>> window_shadows_; |
| |
| base::ScopedMultiSourceObservation<aura::Window, aura::WindowObserver> |
| windows_observation_{this}; |
| }; |
| |
| } // namespace ash |
| |
| #endif // ASH_WM_RESIZE_SHADOW_CONTROLLER_H_ |