/*

 * Copyright (C) 2007 Apple Inc.  All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY

 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR

 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 

 */

#ifndef WebScrollBar_h

#define WebScrollBar_h

#include "IWebScrollBarDelegatePrivate.h"

#include "IWebScrollBarPrivate.h"

#include <wtf/RefPtr.h>

#include <wtf/OwnPtr.h>

#pragma warning(push, 0)

#include <WebCore/COMPtr.h>

#include <WebCore/ScrollBar.h>

#pragma warning(pop)

namespace WebCore {

class PlatformScrollbar;

}

using namespace WebCore;

class WebScrollBar : public IWebScrollBarPrivate, ScrollbarClient

{

public:

    static WebScrollBar* createInstance();

protected:

    WebScrollBar();

    ~WebScrollBar();

public:

    // IUnknown

    virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID riid, void** ppvObject);

    virtual ULONG STDMETHODCALLTYPE AddRef(void);

    virtual ULONG STDMETHODCALLTYPE Release(void);

    // IWebScrollBarPrivate

    virtual HRESULT STDMETHODCALLTYPE init( 

        /* [in] */ IWebScrollBarDelegatePrivate* delegate,

        /* [in] */ OLE_HANDLE containingWindow,

        /* [in] */ WebScrollBarOrientation orientation,

        /* [in] */ WebScrollBarControlSize controlSize);

    virtual HRESULT STDMETHODCALLTYPE setEnabled( 

        /* [in] */ BOOL enabled);

    virtual HRESULT STDMETHODCALLTYPE setSteps( 

        /* [in] */ int lineStep,

        /* [in] */ int pageStep);

    virtual HRESULT STDMETHODCALLTYPE setProportion( 

        /* [in] */ int visibleSize,

        /* [in] */ int totalSize);

    virtual HRESULT STDMETHODCALLTYPE setRect( 

        /* [in] */ RECT bounds);

    virtual HRESULT STDMETHODCALLTYPE setValue( 

        /* [in] */ int value);

    virtual HRESULT STDMETHODCALLTYPE value( 

        /* [retval][out] */ int* value);

    virtual HRESULT STDMETHODCALLTYPE paint( 

        /* [in] */ HDC dc,

        /* [in] */ RECT damageRect);

    virtual HRESULT STDMETHODCALLTYPE frameGeometry( 

        /* [retval][out] */ RECT* bounds);

    virtual HRESULT STDMETHODCALLTYPE width( 

        /* [retval][out] */ int* w);

    virtual HRESULT STDMETHODCALLTYPE height( 

        /* [retval][out] */ int* h);

    virtual HRESULT STDMETHODCALLTYPE requestedWidth( 

        /* [retval][out] */ int* w);

    virtual HRESULT STDMETHODCALLTYPE requestedHeight( 

        /* [retval][out] */ int* h);

    virtual HRESULT STDMETHODCALLTYPE handleMouseEvent( 

        /* [in] */ OLE_HANDLE window,

        /* [in] */ UINT msg,

        /* [in] */ WPARAM wParam,

        /* [in] */ LPARAM lParam);

    virtual HRESULT STDMETHODCALLTYPE scroll( 

        /* [in] */ WebScrollDirection direction,

        /* [in] */ WebScrollGranularity granularity,

        /* [in] */ float multiplier);

protected:

    // ScrollbarClient

    virtual void valueChanged(Scrollbar*);

    // Used to obtain a window clip rect.

    virtual IntRect windowClipRect() const;

    ULONG m_refCount;

    RefPtr<WebCore::PlatformScrollbar> m_scrollBar;

    COMPtr<IWebScrollBarDelegatePrivate> m_delegate;

};

#endif