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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_PUBLIC_DRAG_DROP_CLIENT_H_
#define UI_WM_PUBLIC_DRAG_DROP_CLIENT_H_
#include "ui/base/dragdrop/drag_drop_types.h"
#include "ui/gfx/native_widget_types.h"
#include "ui/wm/wm_export.h"
namespace gfx {
class Point;
}
namespace ui {
class LocatedEvent;
class OSExchangeData;
}
namespace aura {
class Window;
namespace client {
// An interface implemented by an object that controls a drag and drop session.
class WM_EXPORT DragDropClient {
public:
virtual ~DragDropClient() {}
// Initiates a drag and drop session. Returns the drag operation that was
// applied at the end of the drag drop session. |root_location| is in the
// root Window's coordinate system.
virtual int StartDragAndDrop(const ui::OSExchangeData& data,
aura::Window* root_window,
aura::Window* source_window,
const gfx::Point& root_location,
int operation,
ui::DragDropTypes::DragEventSource source) = 0;
// Called when mouse is dragged during a drag and drop.
virtual void DragUpdate(aura::Window* target,
const ui::LocatedEvent& event) = 0;
// Called when mouse is released during a drag and drop.
virtual void Drop(aura::Window* target,
const ui::LocatedEvent& event) = 0;
// Called when a drag and drop session is cancelled.
virtual void DragCancel() = 0;
// Returns true if a drag and drop session is in progress.
virtual bool IsDragDropInProgress() = 0;
};
WM_EXPORT void SetDragDropClient(Window* root_window, DragDropClient* client);
WM_EXPORT DragDropClient* GetDragDropClient(Window* root_window);
} // namespace client
} // namespace aura
#endif // UI_WM_PUBLIC_DRAG_DROP_CLIENT_H_
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