www.pudn.com > USBÉ豸¶Áд.rar > ScrollerCtrl.h

// CScrollerCtrl : class definition
// Copyright 2002, Joshua Heyer
//  You are free to use this code for whatever you want, provided you
// give credit where credit is due: if you use this code without substantial
// modification, please presearve this comment block.
//  I'm providing this code in the hope that it is useful to someone, as i have
// gotten much use out of other peoples code over the years.
//  If you see value in it, make some improvements, etc., i would appreciate it 
// if you sent me some feedback.
//  Have fun!
//

#ifndef _SCROLLER_CTRL_H_INCLUDED_ 
#define _SCROLLER_CTRL_H_INCLUDED_ 
 
class CScrollerCtrl : public CWnd 
{ 
public: 
	CScrollerCtrl(); 
 
   // public API 
 
   // create the window; remove WS_VSCROLL to avoid showing scrollbar, remove WS_TABSTOP to disable keyboard scrolling. 
	BOOL Create(const RECT& rect, CWnd* pParentWnd, UINT uStyle = WS_CHILD|WS_VISIBLE|WS_VSCROLL|WS_TABSTOP|WS_GROUP, UINT nID = 0); 
   // activate/deactivate wrapping mode: 
   void SetWrapping(BOOL bWrap); 
   // Sets the color used for the background (if no pattern is set) or margins (if pattern is set and not tiled) 
   void SetBgColor(COLORREF clrBg); 
   // Sets the color used for text 
   void SetFgColor(COLORREF clrBg); 
   // Sets the font; size is in points, see LOGFONT documentation for weight constants 
   void SetFont(const CString& strName, int nSize, int nWeight); 
   // Sets the text to be displayed 
   void SetText(const CString& strText); 
   // Sets the bitmap to be displayed above the text 
   CBitmap* SetLogo(CBitmap* pbmpLogo); 
   // Sets the background pattern 
   CBitmap* SetPattern(CBitmap* pbmpPattern, BOOL bTile); 
   // Sets the time between frames (autoscrolling speed) (will revert to default if less than 0) (milliseconds) 
   void SetScrollDelay(int nScrollDelay); 
   // Sets the delay when autoscrolling pauses (will disable pausing if set less than scroll delay) (milliseconds) 
   void SetScrollPause(int nScrollPause); 
 
   // command messages: 
   // sent when text has scrolled completely off the window 
   static const int  SC_SCROLL_COMPLETE; 
protected: 
   // utility: override these in a derived class if you 
   // want to do something fancy. 
   virtual void RecalcLayout(CDC* pDC); 
   virtual void FillBackground(CDC* pDC); 
	virtual int DrawLogo(CDC* pDC, int nOffset, BOOL bDraw = TRUE); 
	virtual int DrawBodyText(CDC* pDC, int nOffset, BOOL bDraw = TRUE); 
 
   // message handlers 
	afx_msg BOOL OnEraseBkgnd(CDC* pDC); 
	afx_msg UINT OnGetDlgCode(); 
	afx_msg void OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags); 
	afx_msg BOOL OnMouseWheel(UINT nFlags, short zDelta, CPoint pt); 
	afx_msg void OnPaint(); 
	afx_msg void OnTimer(UINT nIDEvent); 
   afx_msg void OnVScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar); 
   afx_msg void OnLButtonDown(UINT nFlags, CPoint point); 
	DECLARE_MESSAGE_MAP() 
private: 
   // defaults 
   static const int   nSCROLL_DELAY;   // time between each frame (milliseconds) 
   static const int   nSCROLL_PAUSE;   // time to pause before autoscrolling (milliseconds) 
   static const int   nMARGIN;         // (pixels) 
   static const int   nFONT_SIZE;      // (points) 
   static const int   nFONT_WEIGHT; 
   static const char* szFONT_NAME; 
 
   // instance data 
   enum { SCROLLING, PAUSED } m_eState; 
	COLORREF m_crBackground; 
	COLORREF m_crForeground; 
   CFont    m_font; 
   CString  m_strText; 
   CBitmap* m_pbmpPattern; 
	CBitmap* m_pbmpLogo; 
	CBitmap  m_bmpBackBuffer; 
	CSize    m_sizeBuffer; 
	int      m_nContentHeight; 
	int      m_nScrollOffset; 
   BOOL     m_bTilePattern; 
   BOOL     m_bShowScroll; 
   BOOL     m_bWrap; 
   int      m_nScrollDelay; 
   int      m_nScrollPause; 
   UINT_PTR m_unTimerPause; 
}; 
 
#endif _SCROLLER_CTRL_H_INCLUDED_