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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 ASH_DRAG_DROP_DRAG_DROP_CONTROLLER_H_
#define ASH_DRAG_DROP_DRAG_DROP_CONTROLLER_H_
#pragma once
#include "ash/ash_export.h"
#include "base/callback.h"
#include "ui/aura/client/drag_drop_client.h"
#include "ui/aura/event.h"
#include "ui/aura/event_filter.h"
#include "ui/aura/window_observer.h"
#include "ui/base/dragdrop/os_exchange_data.h"
#include "ui/base/events.h"
#include "ui/compositor/layer_animation_observer.h"
#include "ui/gfx/point.h"
namespace aura {
class Window;
}
namespace ui {
class LayerAnimationSequence;
}
namespace ash {
namespace test {
class DragDropControllerTest;
}
namespace internal {
class DragImageView;
class ASH_EXPORT DragDropController
: public aura::client::DragDropClient,
public aura::EventFilter,
public ui::ImplicitAnimationObserver,
public aura::WindowObserver {
public:
DragDropController();
virtual ~DragDropController();
void set_should_block_during_drag_drop(bool should_block_during_drag_drop) {
should_block_during_drag_drop_ = should_block_during_drag_drop;
}
// Overridden from aura::client::DragDropClient:
virtual int StartDragAndDrop(const ui::OSExchangeData& data,
const gfx::Point& root_location,
int operation) OVERRIDE;
virtual void DragUpdate(aura::Window* target,
const aura::LocatedEvent& event) OVERRIDE;
virtual void Drop(aura::Window* target,
const aura::LocatedEvent& event) OVERRIDE;
virtual void DragCancel() OVERRIDE;
virtual bool IsDragDropInProgress() OVERRIDE;
// Overridden from aura::EventFilter:
virtual bool PreHandleKeyEvent(aura::Window* target,
aura::KeyEvent* event) OVERRIDE;
virtual bool PreHandleMouseEvent(aura::Window* target,
aura::MouseEvent* event) OVERRIDE;
virtual ui::TouchStatus PreHandleTouchEvent(aura::Window* target,
aura::TouchEvent* event) OVERRIDE;
virtual ui::GestureStatus PreHandleGestureEvent(
aura::Window* target,
aura::GestureEvent* event) OVERRIDE;
// Overridden from aura::WindowObserver.
virtual void OnWindowDestroyed(aura::Window* window) OVERRIDE;
private:
friend class ash::test::DragDropControllerTest;
// Implementation of ImplicitAnimationObserver
virtual void OnImplicitAnimationsCompleted() OVERRIDE;
// Helper method to start drag widget flying back animation.
void StartCanceledAnimation();
// Helper method to reset everything.
void Cleanup();
scoped_ptr<DragImageView> drag_image_;
gfx::Point drag_image_offset_;
const ui::OSExchangeData* drag_data_;
int drag_operation_;
// Window that is currently under the drag cursor.
aura::Window* drag_window_;
gfx::Point drag_start_location_;
bool drag_drop_in_progress_;
// Indicates whether the caller should be blocked on a drag/drop session.
// Only be used for tests.
bool should_block_during_drag_drop_;
// Closure for quitting nested message loop.
base::Closure quit_closure_;
DISALLOW_COPY_AND_ASSIGN(DragDropController);
};
} // namespace internal
} // namespace ash
#endif // ASH_DRAG_DROP_DRAG_DROP_CONTROLLER_H_
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