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      1 /*
      2  * Copyright (C) 2007 Apple Inc.  All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #ifndef WebScrollBar_h
     27 #define WebScrollBar_h
     28 
     29 #include "WebKit.h"
     30 
     31 #include <wtf/RefPtr.h>
     32 #include <wtf/OwnPtr.h>
     33 
     34 #pragma warning(push, 0)
     35 #include <WebCore/COMPtr.h>
     36 #include <WebCore/Scrollbar.h>
     37 #include <WebCore/ScrollbarClient.h>
     38 #pragma warning(pop)
     39 
     40 namespace WebCore {
     41 class Scrollbar;
     42 }
     43 
     44 using namespace WebCore;
     45 
     46 class WebScrollBar : public IWebScrollBarPrivate, ScrollbarClient
     47 {
     48 public:
     49     static WebScrollBar* createInstance();
     50 protected:
     51     WebScrollBar();
     52     ~WebScrollBar();
     53 
     54 public:
     55     // IUnknown
     56     virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID riid, void** ppvObject);
     57     virtual ULONG STDMETHODCALLTYPE AddRef(void);
     58     virtual ULONG STDMETHODCALLTYPE Release(void);
     59 
     60     // IWebScrollBarPrivate
     61     virtual HRESULT STDMETHODCALLTYPE init(
     62         /* [in] */ IWebScrollBarDelegatePrivate* delegate,
     63         /* [in] */ OLE_HANDLE containingWindow,
     64         /* [in] */ WebScrollBarOrientation orientation,
     65         /* [in] */ WebScrollBarControlSize controlSize);
     66 
     67     virtual HRESULT STDMETHODCALLTYPE setEnabled(
     68         /* [in] */ BOOL enabled);
     69 
     70     virtual HRESULT STDMETHODCALLTYPE setSteps(
     71         /* [in] */ int lineStep,
     72         /* [in] */ int pageStep);
     73 
     74     virtual HRESULT STDMETHODCALLTYPE setProportion(
     75         /* [in] */ int visibleSize,
     76         /* [in] */ int totalSize);
     77 
     78     virtual HRESULT STDMETHODCALLTYPE setRect(
     79         /* [in] */ RECT bounds);
     80 
     81     virtual HRESULT STDMETHODCALLTYPE setValue(
     82         /* [in] */ int value);
     83 
     84     virtual HRESULT STDMETHODCALLTYPE value(
     85         /* [retval][out] */ int* value);
     86 
     87     virtual HRESULT STDMETHODCALLTYPE paint(
     88         /* [in] */ HDC dc,
     89         /* [in] */ RECT damageRect);
     90 
     91     virtual HRESULT STDMETHODCALLTYPE frameRect(
     92         /* [retval][out] */ RECT* bounds);
     93 
     94     virtual HRESULT STDMETHODCALLTYPE width(
     95         /* [retval][out] */ int* w);
     96 
     97     virtual HRESULT STDMETHODCALLTYPE height(
     98         /* [retval][out] */ int* h);
     99 
    100     virtual HRESULT STDMETHODCALLTYPE requestedWidth(
    101         /* [retval][out] */ int* w);
    102 
    103     virtual HRESULT STDMETHODCALLTYPE requestedHeight(
    104         /* [retval][out] */ int* h);
    105 
    106     virtual HRESULT STDMETHODCALLTYPE handleMouseEvent(
    107         /* [in] */ OLE_HANDLE window,
    108         /* [in] */ UINT msg,
    109         /* [in] */ WPARAM wParam,
    110         /* [in] */ LPARAM lParam);
    111 
    112     virtual HRESULT STDMETHODCALLTYPE scroll(
    113         /* [in] */ WebScrollDirection direction,
    114         /* [in] */ WebScrollGranularity granularity,
    115         /* [in] */ float multiplier);
    116 
    117 protected:
    118     // ScrollbarClient
    119     virtual void valueChanged(Scrollbar*);
    120     virtual void invalidateScrollbarRect(Scrollbar*, const IntRect&);
    121 
    122     // FIXME: We should provide a way to set this value.
    123     virtual bool isActive() const { return true; }
    124 
    125     virtual bool scrollbarCornerPresent() const { return false; }
    126 
    127     ULONG m_refCount;
    128     HWND m_containingWindow;
    129     RefPtr<WebCore::Scrollbar> m_scrollBar;
    130     COMPtr<IWebScrollBarDelegatePrivate> m_delegate;
    131 };
    132 
    133 #endif
    134