www.pudn.com > DigtalImageProc.rar > BitmapRect.cpp

// BitmapRect.cpp : implementation file 
// 
 
#include "stdafx.h" 
#include "BitmapRect.h" 
 
#ifdef _DEBUG 
#define new DEBUG_NEW 
#undef THIS_FILE 
static char THIS_FILE[] = __FILE__; 
#endif 
 
///////////////////////////////////////////////////////////////////////////// 
// CBitmapRect 
 
CBitmapRect::CBitmapRect() 
{ 
 
} 
 
CBitmapRect::~CBitmapRect() 
{ 
//ModifyStyle(0,WS_HSCROLL|WS_VSCROLL|ES_READONLY|ES_MULTILINE); 
 
} 
 
 
BEGIN_MESSAGE_MAP(CBitmapRect, CEdit) 
	//{{AFX_MSG_MAP(CBitmapRect) 
	ON_WM_PAINT() 
	ON_WM_MOUSEMOVE() 
	ON_WM_VSCROLL() 
	ON_WM_HSCROLL() 
	ON_WM_LBUTTONDOWN() 
	//}}AFX_MSG_MAP 
END_MESSAGE_MAP() 
 
///////////////////////////////////////////////////////////////////////////// 
// CBitmapRect message handlers 
void CBitmapRect::OnPaint()  
{ 
	CPaintDC dc(this); // device context for painting 
	// TODO: Add your message handler code here 
	CRect rect; 
	GetClientRect(&rect); 
	if(ViewBmp.flag) 
	{ 
		if(ViewBmp.GetHeight() < rect.Height() || ViewBmp.GetWidth() < rect.Width()) 
		{	 
			CBrush br(RGB(255,255,255)); 
			dc.FillRect(&rect,&br); 
		} 
		ViewBmp.Display(0,0,&dc); 
	} 
	else 
	{ 
		CBrush br(RGB(255,255,255)); 
		dc.FillRect(&rect,&br); 
	} 
} 
HCURSOR hc = LoadCursor(NULL,IDC_ARROW); 
void CBitmapRect::OnMouseMove(UINT nFlags, CPoint point)  
{ 
	// TODO: Add your message handler code here and/or call default 
	SetCursor(hc); 
	//CEdit::OnMouseMove(nFlags, point); 
} 
 
void CBitmapRect::SetBitmap(memBitmap &Bitmap) 
{ 
	orgBmp = Bitmap; 
	 
	ShowScrollBar(SB_BOTH); 
	CRect rect; 
	GetClientRect(&rect); 
	int w = rect.Width(),h = rect.Height(); 
	int cx = orgBmp.GetWidth(),cy = orgBmp.GetHeight(); 
	if(cx > w) 
	{ 
		this->EnableScrollBar(SB_HORZ); 
		this->SetScrollRange(SB_HORZ,0,cx-w); 
	} 
	else 
		EnableScrollBar(SB_HORZ,ESB_DISABLE_BOTH); 
	if(cy > h) 
	{ 
		this->EnableScrollBar(SB_VERT); 
		this->SetScrollRange(SB_VERT,0,cy-h); 
	} 
	else 
		EnableScrollBar(SB_VERT,ESB_DISABLE_BOTH); 
	SetScrollPos(SB_HORZ,0); 
	SetScrollPos(SB_VERT,0); 
	if(!ViewBmp.flag) 
		ViewBmp.CreateDirect(min(w,cx),min(h,cy)); 
	else 
		ViewBmp.ChangeSize(min(w,cx),min(h,cy)); 
	 
	ViewBmp.CopyRect(0,0,orgBmp); 
	InvalidateRect(&rect); 
	UpdateWindow(); 
} 
 
void CBitmapRect::OnVScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar)  
{ 
	// TODO: Add your message handler code here and/or call default 
	int minpos; 
   int maxpos; 
   GetScrollRange(SB_VERT,&minpos, &maxpos);  
   maxpos = GetScrollLimit(SB_VERT); 
 
   // Get the current position of scroll box. 
   int curpos = GetScrollPos(SB_VERT); 
 
   // Determine the new position of scroll box. 
   switch (nSBCode) 
   { 
   case SB_TOP:      // Scroll to far left. 
      curpos = minpos; 
      break; 
 
   case SB_BOTTOM:      // Scroll to far right. 
      curpos = maxpos; 
      break; 
 
   case SB_ENDSCROLL:   // End scroll. 
      break; 
 
   case SB_LINEUP:      // Scroll left. 
      if (curpos > minpos) 
         curpos--; 
      break; 
 
   case SB_LINEDOWN:   // Scroll right. 
      if (curpos < maxpos) 
         curpos++; 
      break; 
 
   case SB_PAGEUP:    // Scroll one page left. 
   { 
      // Get the page size.  
      SCROLLINFO   info; 
      GetScrollInfo(SB_VERT,&info, SIF_ALL); 
    
      if (curpos > minpos) 
      curpos = max(minpos, curpos - (int) info.nPage); 
   } 
      break; 
 
   case SB_PAGEDOWN:      // Scroll one page right. 
   { 
      // Get the page size.  
      SCROLLINFO   info; 
      GetScrollInfo(SB_VERT,&info, SIF_ALL); 
 
      if (curpos < maxpos) 
         curpos = min(maxpos, curpos + (int) info.nPage); 
   } 
      break; 
 
   case SB_THUMBPOSITION: // Scroll to absolute position. nPos is the position 
      curpos = nPos;      // of the scroll box at the end of the drag operation. 
      break; 
 
   case SB_THUMBTRACK:   // Drag scroll box to specified position. nPos is the 
      curpos = nPos;     // position that the scroll box has been dragged to. 
      break; 
   } 
 
   // Set the new position of the thumb  
    SetScrollPos(SB_VERT,curpos); 
	ViewBmp.CopyRect(GetScrollPos(SB_HORZ),curpos,orgBmp);		 
	CRect rect; 
	GetClientRect(&rect); 
	 
	//GetParent()-> 
	InvalidateRect(&rect); 
	UpdateWindow(); 
	//CEdit::OnVScroll(nSBCode, nPos, pScrollBar); 
} 
 
void CBitmapRect::OnHScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar)  
{ 
	// TODO: Add your message handler code here and/or call default 
	int minpos; 
 	int maxpos; 
 	GetScrollRange(SB_HORZ,&minpos, &maxpos);  
 	maxpos = GetScrollLimit(SB_HORZ); 
  
    // Get the current position of scroll box. 
 	int curpos = GetScrollPos(SB_HORZ); 
  
    // Determine the new position of scroll box. 
 	switch (nSBCode) 
 	{ 
 		case SB_LEFT:      // Scroll to far left. 
 		curpos = minpos; 
 		break; 
  
 		case SB_RIGHT:      // Scroll to far right. 
 		curpos = maxpos; 
 		break; 
  
 		case SB_ENDSCROLL:   // End scroll. 
 		break; 
  
 		case SB_LINELEFT:      // Scroll left. 
 		if (curpos > minpos) 
 			curpos--; 
 			break; 
  
 		case SB_LINERIGHT:   // Scroll right. 
 		if (curpos < maxpos) 
 			curpos++; 
 			break; 
  
 		case SB_PAGELEFT:    // Scroll one page left. 
 		{ 
       // Get the page size.  
 			SCROLLINFO   info; 
 			GetScrollInfo(SB_HORZ,&info, SIF_ALL); 
     
 			if (curpos > minpos) 
 			curpos = max(minpos, curpos - (int) info.nPage); 
 		} 
 			break; 
  
 		case SB_PAGERIGHT:      // Scroll one page right. 
 		{ 
       // Get the page size.  
 			SCROLLINFO   info; 
 			GetScrollInfo(SB_HORZ,&info, SIF_ALL); 
  
 			if (curpos < maxpos) 
 				curpos = min(maxpos, curpos + (int) info.nPage); 
 		} 
 			break; 
  
 		case SB_THUMBPOSITION: // Scroll to absolute position. nPos is the position 
 			curpos = nPos;      // of the scroll box at the end of the drag operation. 
 			break; 
  
 		case SB_THUMBTRACK:   // Drag scroll box to specified position. nPos is the 
 			curpos = nPos;     // position that the scroll box has been dragged to. 
 			break; 
     } 
  
 		SetScrollPos(SB_HORZ,curpos); 
		ViewBmp.CopyRect(curpos,GetScrollPos(SB_VERT),orgBmp); 
		CRect rect; 
 
		GetClientRect(&rect); 
		//GetParent()-> 
		InvalidateRect(&rect); 
		UpdateWindow(); 
} 
 
void CBitmapRect::OnLButtonDown(UINT nFlags, CPoint point)  
{ 
	// TODO: Add your message handler code here and/or call default 
	 
	//CEdit::OnLButtonDown(nFlags, point); 
} 
 
void CBitmapRect::Close() 
{ 
	CRect rect; 
	orgBmp.Release(); 
	ViewBmp.Release(); 
	GetClientRect(&rect); 
	InvalidateRect(&rect); 
	UpdateWindow(); 
}