scrlbutn.h

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// $Id: scrlbutn.h 751 2006-03-31 15:43:49Z alex $
/* @@tag:xara-cn@@ DO NOT MODIFY THIS LINE
================================XARAHEADERSTART===========================
 
               Xara LX, a vector drawing and manipulation program.
                    Copyright (C) 1993-2006 Xara Group Ltd.
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----------------------------------

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=================================XARAHEADEREND============================
 */
//
// Custom Windows scroll bar buttons.  This object is used by the (private)
// implementation of CScroller.
//
/*
 *  */


#ifndef SCRLBUTN__INC
#define SCRLBUTN__INC

#include <afxext.h>                 // for class CBitmapButton


// These identifiers are used to distinguish the decrement button from the
// increment button when they are clicked.
#define IDB_DECBUTTON   1
#define IDB_INCBUTTON   2

#define IS_CHICAGO ((LOBYTE(LOWORD(GetVersion()))) > 3)
 

// CScrollerButton, a specialisation of the MFC control class CBitmapButton,
// which displays on its face bitmaps loaded from the display driver's
// resources.

/***************************************************************************************
>   class CScrollerButton : public CBitmapButton

    Author:     Justin_Flude (Xara Group Ltd) <camelotdev@xara.com>
    Created:    ages ago
    Purpose:    This OIL class extends standard Windows bitmapped buttons so that
                they respond to clicks with the right mouse-button, and send
                notification messages as long as they are held down.
                
****************************************************************************************/
class CScrollerButton : public CBitmapButton
{

// Construction and destruction.

public:
    enum Orientation                    // used to specify the direction of arrows etc.
    {
        UP, DOWN, LEFT, RIGHT
    };

private:
    // display driver's up/down/disabled button bitmaps
    static UINT32 BitmapNames[4][3];
    
    Orientation Orient;
    BOOL Reversed;
    BOOL TimerOn;
    UINT32 Message;
        
public:
    CScrollerButton(Orientation ort, UINT32 msg);
    
    virtual BOOL Create(LPCTSTR, DWORD style, const RECT& rect, CWnd* parent, UINT32 id);


// Implementation.

private:
    virtual BOOL LoadOEMBitmaps(UINT32 upID, UINT32 downID, UINT32 disableID);
    void HandleButtonDown(BOOL reverse);
    void HandleButtonUp();  
    void DrawItem (LPDRAWITEMSTRUCT lpDrawItemStruct);
    BOOL PlotMaskedBitmap(CDC* destDC, CBitmap* srcBitmap, INT32 SrcOffset,
                    INT32 xPlotOffset,INT32 yPlotOffset, INT32 width, INT32 height);
// Generated message map functions

protected:
    //{{AFX_MSG(CScrollerButton)
        afx_msg void OnLButtonDown(UINT32 nFlags, CPoint point);
        afx_msg void OnLButtonUp(UINT32 nFlags, CPoint point);
        afx_msg void OnRButtonDown(UINT32 nFlags, CPoint point);
        afx_msg void OnRButtonUp(UINT32 nFlags, CPoint point);
        afx_msg void OnTimer(UINT32 nIDEvent);
        afx_msg void OnCancelMode();
        afx_msg void OnLButtonDblClk(UINT32 nFlags, CPoint point);
        afx_msg void OnRButtonDblClk(UINT32 nFlags, CPoint point);
    //}}AFX_MSG
    DECLARE_MESSAGE_MAP()
};


// These private messages are sent by the scroller buttons to their parent window.
#define WM_INCBTNDOWN   (WM_USER + 0x104)
#define WM_DECBTNDOWN   (WM_USER + 0x105)



#endif      // SCRLBUTN__INC

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