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// Copyright 2014 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 ATHENA_UTIL_DRAG_HANDLE_H_
#define ATHENA_UTIL_DRAG_HANDLE_H_
#include "athena/athena_export.h"
namespace views {
class View;
}
namespace athena {
class DragHandleScrollDelegate {
public:
virtual ~DragHandleScrollDelegate() {}
// Beginning of a scroll gesture.
virtual void HandleScrollBegin(float delta) = 0;
// End of the current scroll gesture.
virtual void HandleScrollEnd() = 0;
// Update of the scroll position for the currently active scroll gesture.
virtual void HandleScrollUpdate(float delta) = 0;
};
enum DragHandleScrollDirection { DRAG_HANDLE_VERTICAL, DRAG_HANDLE_HORIZONTAL };
// Creates a handle view which notifies the delegate of the scrolls performed on
// it.
ATHENA_EXPORT views::View* CreateDragHandleView(
DragHandleScrollDirection scroll_direction,
DragHandleScrollDelegate* delegate,
int preferred_width,
int preferred_height);
} // namespace athena
#endif // ATHENA_UTIL_DRAG_HANDLE_H_