/////////////////////////////////////////////////////////////////////////////
// Name:        scrollbar.h
// Purpose:     wxScrollBar class
// Author:      Julian Smart
// Modified by:
// Created:     01/02/97
// RCS-ID:      $Id$
// Copyright:   (c) Julian Smart
// Licence:   	wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifndef _WX_SCROLBAR_H_
#define _WX_SCROLBAR_H_

#ifdef __GNUG__
#pragma interface "scrolbar.h"
#endif

#include "wx/control.h"

WXDLLEXPORT_DATA(extern const wxChar*) wxScrollBarNameStr;

// Scrollbar item
class WXDLLEXPORT wxScrollBar: public wxControl
{
    DECLARE_DYNAMIC_CLASS(wxScrollBar)

public:
    wxScrollBar() { m_pageSize = 0; m_viewSize = 0; m_objectSize = 0; }
    ~wxScrollBar();

    wxScrollBar(wxWindow *parent, wxWindowID id,
            const wxPoint& pos = wxDefaultPosition,
            const wxSize& size = wxDefaultSize,
            long style = wxSB_HORIZONTAL,
            const wxValidator& validator = wxDefaultValidator,
            const wxString& name = wxScrollBarNameStr)
    {
        Create(parent, id, pos, size, style, validator, name);
    }
    bool Create(wxWindow *parent, wxWindowID id,
            const wxPoint& pos = wxDefaultPosition,
            const wxSize& size = wxDefaultSize,
            long style = wxSB_HORIZONTAL,
            const wxValidator& validator = wxDefaultValidator,
            const wxString& name = wxScrollBarNameStr);

    int GetThumbPosition() const ;
    int GetThumbSize() const { return m_pageSize; }
    int GetPageSize() const { return m_viewSize; }
    int GetRange() const { return m_objectSize; }

    virtual void SetThumbPosition(int viewStart);
    virtual void SetScrollbar(int position, int thumbSize, int range, int pageSize,
            bool refresh = TRUE);

#if WXWIN_COMPATIBILITY
    // Backward compatibility
    int GetValue() const { return GetThumbPosition(); }
    void SetValue(int viewStart) { SetThumbPosition(viewStart); }
    void GetValues(int *viewStart, int *viewLength, int *objectLength,
            int *pageLength) const ;
    int GetViewLength() const { return m_viewSize; }
    int GetObjectLength() const { return m_objectSize; }

    void SetPageSize(int pageLength);
    void SetObjectLength(int objectLength);
    void SetViewLength(int viewLength);
#endif

    void Command(wxCommandEvent& event);
    virtual WXHBRUSH OnCtlColor(WXHDC pDC, WXHWND pWnd, WXUINT nCtlColor,
            WXUINT message, WXWPARAM wParam, WXLPARAM lParam);
    virtual bool MSWOnScroll(int orientation, WXWORD wParam,
                             WXWORD pos, WXHWND control);

#if WXWIN_COMPATIBILITY
    // Backward compatibility: generate an old-style scroll command
    void OnScroll(wxScrollEvent& event);
#endif // WXWIN_COMPATIBILITY

protected:
    int m_pageSize;
    int m_viewSize;
    int m_objectSize;

    DECLARE_EVENT_TABLE()
};

#endif
    // _WX_SCROLBAR_H_