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// Copyright (c) 2010 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 VIEWS_CONTROLS_SCROLLBAR_NATIVE_SCROLL_BAR_WIN_H_
#define VIEWS_CONTROLS_SCROLLBAR_NATIVE_SCROLL_BAR_WIN_H_
#include "views/controls/native_control_win.h"
#include "views/controls/scrollbar/native_scroll_bar_wrapper.h"
namespace views {
class ScrollBarContainer;
/////////////////////////////////////////////////////////////////////////////
//
// NativeScrollBarWin
//
// A View subclass that wraps a Native Windows scrollbar control.
//
// A scrollbar is either horizontal or vertical.
//
/////////////////////////////////////////////////////////////////////////////
class NativeScrollBarWin : public NativeControlWin,
public NativeScrollBarWrapper {
public:
// Create new scrollbar, either horizontal or vertical.
explicit NativeScrollBarWin(NativeScrollBar* native_scroll_bar);
virtual ~NativeScrollBarWin();
private:
// Overridden from View for layout purpose.
virtual void Layout();
virtual gfx::Size GetPreferredSize();
// Overridden from View for keyboard UI purpose.
virtual bool OnKeyPressed(const KeyEvent& event);
virtual bool OnMouseWheel(const MouseWheelEvent& e);
// Overridden from NativeControlWin.
virtual void CreateNativeControl();
// Overridden from ScrollBarWrapper.
virtual int GetPosition() const;
virtual View* GetView();
virtual void Update(int viewport_size, int content_size, int current_pos);
// The NativeScrollBar we are bound to.
NativeScrollBar* native_scroll_bar_;
// 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.
scoped_ptr<ScrollBarContainer> sb_container_;
// Last scrollbar state we wrote to the scrollbar. We keep it here, so we can
// reinitialize the scrollbar to its previous state in case it gets hidden and
// recreated.
SCROLLINFO scroll_info_;
DISALLOW_COPY_AND_ASSIGN(NativeScrollBarWin);
};
} // namespace views
#endif // #ifndef VIEWS_CONTROLS_SCROLLBAR_NATIVE_SCROLL_BAR_WIN_H_
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