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// 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 UI_WM_CORE_WINDOW_MODALITY_CONTROLLER_H_
#define UI_WM_CORE_WINDOW_MODALITY_CONTROLLER_H_
#include <vector>
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "ui/aura/env_observer.h"
#include "ui/aura/window_observer.h"
#include "ui/events/event_handler.h"
#include "ui/wm/core/wm_core_export.h"
namespace aura {
class Env;
}
namespace ui {
class EventTarget;
class LocatedEvent;
} // namespace ui
namespace wm {
// Sets the modal parent for the child.
WM_CORE_EXPORT void SetModalParent(aura::Window* child, aura::Window* parent);
// Returns the modal transient child of |window|, or NULL if |window| does not
// have any modal transient children.
WM_CORE_EXPORT aura::Window* GetModalTransient(aura::Window* window);
// WindowModalityController is an event filter that consumes events sent to
// windows that are the transient parents of window-modal windows. This filter
// must be added to the CompoundEventFilter so that activation works properly.
class WM_CORE_EXPORT WindowModalityController : public ui::EventHandler,
public aura::EnvObserver,
public aura::WindowObserver {
public:
explicit WindowModalityController(ui::EventTarget* event_target,
aura::Env* env = nullptr);
~WindowModalityController() override;
// Overridden from ui::EventHandler:
void OnKeyEvent(ui::KeyEvent* event) override;
void OnMouseEvent(ui::MouseEvent* event) override;
void OnTouchEvent(ui::TouchEvent* event) override;
// Overridden from aura::EnvObserver:
void OnWindowInitialized(aura::Window* window) override;
// Overridden from aura::WindowObserver:
void OnWindowPropertyChanged(aura::Window* window,
const void* key,
intptr_t old) override;
void OnWindowVisibilityChanged(aura::Window* window, bool visible) override;
void OnWindowDestroyed(aura::Window* window) override;
private:
// Processes a mouse/touch event, and returns true if the event should be
// consumed.
bool ProcessLocatedEvent(aura::Window* target, ui::LocatedEvent* event);
// Cancel touches on the transient window tree rooted to the top level
// transient window of the |window|.
void CancelTouchesOnTransientWindowTree(aura::Window* window);
aura::Env* env_;
std::vector<aura::Window*> windows_;
ui::EventTarget* event_target_;
DISALLOW_COPY_AND_ASSIGN(WindowModalityController);
};
} // namespace wm
#endif // UI_WM_CORE_WINDOW_MODALITY_CONTROLLER_H_
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