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// Copyright (c) 2006-2008 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 CHROME_VIEWS_NATIVE_SCROLLBAR_H__
#define CHROME_VIEWS_NATIVE_SCROLLBAR_H__
#include "build/build_config.h"
#include "chrome/views/scroll_bar.h"
namespace views {
class HWNDView;
class ScrollBarContainer;
/////////////////////////////////////////////////////////////////////////////
//
// NativeScrollBar
//
// A View subclass that wraps a Native Windows scrollbar control.
//
// A scrollbar is either horizontal or vertical.
//
/////////////////////////////////////////////////////////////////////////////
class NativeScrollBar : public ScrollBar {
public:
// Create new scrollbar, either horizontal or vertical
explicit NativeScrollBar(bool is_horiz);
virtual ~NativeScrollBar();
// Overridden for layout purpose
virtual void Layout();
virtual gfx::Size GetPreferredSize();
// Overridden for keyboard UI purpose
virtual bool OnKeyPressed(const KeyEvent& event);
virtual bool OnMouseWheel(const MouseWheelEvent& e);
virtual void ViewHierarchyChanged(bool is_add, View *parent, View *child);
// Overridden from ScrollBar
virtual void Update(int viewport_size, int content_size, int current_pos);
virtual int GetLayoutSize() const;
virtual int GetPosition() const;
// Return the system sizes
static int GetHorizontalScrollBarHeight();
static int GetVerticalScrollBarWidth();
private:
#if defined(OS_WIN)
// The sb_view_ takes care of keeping sb_container in sync with the
// view hierarchy
HWNDView* sb_view_;
#endif // defined(OS_WIN)
// sb_container_ is a custom hwnd that we use to wrap the real
// windows scrollbar. We need to do this to get the scroll events
// without having to do anything special in the high level hwnd.
ScrollBarContainer* sb_container_;
};
} // namespace views
#endif
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