1// Copyright (c) 2012 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 UI_WM_CORE_WINDOW_MODALITY_CONTROLLER_H_ 6#define UI_WM_CORE_WINDOW_MODALITY_CONTROLLER_H_ 7 8#include <vector> 9 10#include "base/compiler_specific.h" 11#include "ui/aura/env_observer.h" 12#include "ui/aura/window_observer.h" 13#include "ui/events/event_handler.h" 14#include "ui/wm/wm_export.h" 15 16namespace ui { 17class EventTarget; 18class LocatedEvent; 19} 20 21namespace wm { 22 23// Sets the modal parent for the child. 24WM_EXPORT void SetModalParent(aura::Window* child, aura::Window* parent); 25 26// Returns the modal transient child of |window|, or NULL if |window| does not 27// have any modal transient children. 28WM_EXPORT aura::Window* GetModalTransient(aura::Window* window); 29 30// WindowModalityController is an event filter that consumes events sent to 31// windows that are the transient parents of window-modal windows. This filter 32// must be added to the CompoundEventFilter so that activation works properly. 33class WM_EXPORT WindowModalityController : public ui::EventHandler, 34 public aura::EnvObserver, 35 public aura::WindowObserver { 36 public: 37 explicit WindowModalityController(ui::EventTarget* event_target); 38 virtual ~WindowModalityController(); 39 40 // Overridden from ui::EventHandler: 41 virtual void OnKeyEvent(ui::KeyEvent* event) OVERRIDE; 42 virtual void OnMouseEvent(ui::MouseEvent* event) OVERRIDE; 43 virtual void OnTouchEvent(ui::TouchEvent* event) OVERRIDE; 44 45 // Overridden from aura::EnvObserver: 46 virtual void OnWindowInitialized(aura::Window* window) OVERRIDE; 47 48 // Overridden from aura::WindowObserver: 49 virtual void OnWindowPropertyChanged(aura::Window* window, 50 const void* key, 51 intptr_t old) OVERRIDE; 52 virtual void OnWindowVisibilityChanged(aura::Window* window, 53 bool visible) OVERRIDE; 54 virtual void OnWindowDestroyed(aura::Window* window) OVERRIDE; 55 56 private: 57 // Processes a mouse/touch event, and returns true if the event should be 58 // consumed. 59 bool ProcessLocatedEvent(aura::Window* target, 60 ui::LocatedEvent* event); 61 62 std::vector<aura::Window*> windows_; 63 64 ui::EventTarget* event_target_; 65 66 DISALLOW_COPY_AND_ASSIGN(WindowModalityController); 67}; 68 69} // namespace wm 70 71#endif // UI_WM_CORE_WINDOW_MODALITY_CONTROLLER_H_ 72