| // 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_SYSTEM_MODAL_CONTAINER_LAYOUT_MANAGER_H_ |
| #define ASH_WM_SYSTEM_MODAL_CONTAINER_LAYOUT_MANAGER_H_ |
| |
| #include <vector> |
| |
| #include "ash/ash_export.h" |
| #include "ash/snap_to_pixel_layout_manager.h" |
| #include "base/basictypes.h" |
| #include "base/compiler_specific.h" |
| #include "base/memory/scoped_ptr.h" |
| #include "ui/aura/window_observer.h" |
| #include "ui/keyboard/keyboard_controller_observer.h" |
| |
| namespace aura { |
| class Window; |
| class EventFilter; |
| } |
| namespace gfx { |
| class Rect; |
| } |
| |
| namespace ash { |
| class DimWindow; |
| |
| // LayoutManager for the modal window container. |
| // System modal windows which are centered on the screen will be kept centered |
| // when the container size changes. |
| class ASH_EXPORT SystemModalContainerLayoutManager |
| : public SnapToPixelLayoutManager, |
| public aura::WindowObserver, |
| public keyboard::KeyboardControllerObserver { |
| public: |
| explicit SystemModalContainerLayoutManager(aura::Window* container); |
| ~SystemModalContainerLayoutManager() override; |
| |
| bool has_modal_background() const { return modal_background_ != NULL; } |
| |
| // Overridden from SnapToPixelLayoutManager: |
| void OnWindowResized() override; |
| void OnWindowAddedToLayout(aura::Window* child) override; |
| void OnWillRemoveWindowFromLayout(aura::Window* child) override; |
| void SetChildBounds(aura::Window* child, |
| const gfx::Rect& requested_bounds) override; |
| |
| // Overridden from aura::WindowObserver: |
| void OnWindowPropertyChanged(aura::Window* window, |
| const void* key, |
| intptr_t old) override; |
| void OnWindowDestroying(aura::Window* window) override; |
| |
| // Overridden from keyboard::KeyboardControllerObserver: |
| void OnKeyboardBoundsChanging(const gfx::Rect& new_bounds) override; |
| |
| // Can a given |window| receive and handle input events? |
| bool CanWindowReceiveEvents(aura::Window* window); |
| |
| // Activates next modal window if any. Returns false if there |
| // are no more modal windows in this layout manager. |
| bool ActivateNextModalWindow(); |
| |
| // Creates modal background window, which is a partially-opaque |
| // fullscreen window. If there is already a modal background window, |
| // it will bring it the top. |
| void CreateModalBackground(); |
| |
| void DestroyModalBackground(); |
| |
| // Is the |window| modal background? |
| static bool IsModalBackground(aura::Window* window); |
| |
| private: |
| void AddModalWindow(aura::Window* window); |
| void RemoveModalWindow(aura::Window* window); |
| |
| // Reposition the dialogs to become visible after the work area changes. |
| void PositionDialogsAfterWorkAreaResize(); |
| |
| // Get the usable bounds rectangle for enclosed dialogs. |
| gfx::Rect GetUsableDialogArea(); |
| |
| // Gets the new bounds for a |window| to use which are either centered (if the |
| // window was previously centered) or fitted to the screen. |
| gfx::Rect GetCenteredAndOrFittedBounds(const aura::Window* window); |
| |
| // Returns true if |window_bounds| is centered. |
| bool DialogIsCentered(const gfx::Rect& window_bounds); |
| |
| aura::Window* modal_window() { |
| return !modal_windows_.empty() ? modal_windows_.back() : NULL; |
| } |
| |
| // The container that owns the layout manager. |
| aura::Window* container_; |
| |
| // A window that dims the windows behind the modal window(s) being |
| // shown in |container_|. |
| DimWindow* modal_background_; |
| |
| // A stack of modal windows. Only the topmost can receive events. |
| std::vector<aura::Window*> modal_windows_; |
| |
| DISALLOW_COPY_AND_ASSIGN(SystemModalContainerLayoutManager); |
| }; |
| |
| } // namespace ash |
| |
| #endif // ASH_WM_SYSTEM_MODAL_CONTAINER_LAYOUT_MANAGER_H_ |