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📄 viewwnd.cpp

📁 又VC＋＋实现的基于TWAIN的扫描仪图像输入处理软件
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123 
    nPos2=pData->m_ptPaintOrg.y;
    //获得鼠标所在的父窗口用户区,并将坐标拷贝到rt0中
	GetParent()->GetClientRect(rt0);
	//根据鼠标形状来确定鼠标抬起时候的操作
	switch(m_iCursorType)	
	{
	  case CT_CROSS: //十字形状
	    if(bTrack)   //如果按下过
		{ 
		  if(L)      //左拉
		  {
            if(Rect.left==0)
			{
			   if(Rect.top==0)
			   {
				 Rect.right=m_SelectZoom.right-m_SelectZoom.left;
			     Rect.bottom=m_SelectZoom.bottom-m_SelectZoom.top;
			   }
			   else
			   {
                 Rect.bottom=m_SelectZoom.bottom+(point.y-t)*(pData->m_nZoomFactor);
			     Rect.right=m_SelectZoom.right-m_SelectZoom.left;
			   }
			}
		    else if(Rect.top==0)
			{
               Rect.right=m_SelectZoom.right+(point.x-s)*(pData->m_nZoomFactor);
			   Rect.bottom=m_SelectZoom.bottom-m_SelectZoom.top;
			}
            else if(Rect.right==shuzu3)
			{
			   if(Rect.bottom==shuzu5)
			   {
                 Rect.right=shuzu3;
			     Rect.bottom=shuzu5;
			   }
               else
			   {
			     Rect.bottom=m_SelectZoom.bottom+(point.y-t)*(pData->m_nZoomFactor);
			     Rect.right=shuzu3;	
			   }
			}
		   else if(Rect.bottom==shuzu5)
		   {
			  Rect.right=m_SelectZoom.right+(point.x-s)*(pData->m_nZoomFactor);
			  Rect.bottom=shuzu5;
		   }
	 	   else
		   {
		      Rect.right=m_SelectZoom.right+(point.x-s)*(pData->m_nZoomFactor);
	          Rect.bottom=m_SelectZoom.bottom+(point.y-t)*(pData->m_nZoomFactor);
		   }
		 }//判断L结束
	     else //如果不是左拉
		 {
	        if(H)//水平拉
			{
			   if(Rect.bottom<0 )
			   {
				 Rect.bottom=0;
				 Rect.right=m_SelectZoom.right;
			   }
			   else if(Rect.bottom>shuzu5)
			   {
				 Rect.bottom=shuzu5;
				 Rect.right=m_SelectZoom.right;
			   }
			   else
			   {
			      Rect.bottom=point.y*(pData->m_nZoomFactor)+nPos2;
			      Rect.right=m_SelectZoom.right;	
			   }
			}//结束H
			else if(V) //垂直落
			{
			   if(Rect.right<0)
			   {
				  Rect.right=0;
				  Rect.bottom=m_SelectZoom.bottom;
			   }
			   else if(Rect.right>shuzu3)
			   {
				  Rect.right=shuzu3;
				  Rect.bottom=m_SelectZoom.bottom;
			   }
			   else
			   {
			      Rect.bottom=m_SelectZoom.bottom;
			      Rect.right=point.x*(pData->m_nZoomFactor)+nPos1;
			   }
			}//结束V
			else
			{
				if(Rect.right<0&&Rect.bottom>shuzu5)
				{
				   Rect.right=0;
				   Rect.bottom=shuzu5;
				}
				else if(Rect.right>0&&Rect.right<shuzu3&&Rect.bottom>shuzu5)
				{
				   Rect.right=(point.x)*(pData->m_nZoomFactor)+nPos1;
				   Rect.bottom=shuzu5;
				}
				else if(Rect.right>shuzu3&&Rect.bottom>shuzu5)
				{
				   Rect.right=shuzu3;
				   Rect.bottom=shuzu5;
				}
				else if(Rect.right<0&&Rect.bottom<shuzu5&&Rect.bottom>0)
				{
				   Rect.right=0;
				   Rect.bottom=(point.y)*(pData->m_nZoomFactor)+nPos2;
				}
				else if(Rect.right>shuzu3&&Rect.bottom<shuzu5&&Rect.bottom>0)
				{
				   Rect.right=shuzu3;
			       Rect.bottom=(point.y)*(pData->m_nZoomFactor)+nPos2;	
				}
				else if(Rect.right<0&&Rect.bottom<0)
				{
				   Rect.right=0;
				   Rect.bottom=0;
				}
				else if(Rect.right>0&&Rect.right<shuzu3&&Rect.bottom<0)
				{	
				   Rect.right=(point.x)*(pData->m_nZoomFactor)+nPos1;
				   Rect.bottom=0;
				}
				else if(Rect.right>shuzu3&&Rect.bottom<0)
				{
				   Rect.right=shuzu3;
				   Rect.bottom=0;
				}
				else 
				{
				   if(zx==point.x&&zy==point.y)
				   {
				     Rect.top=m_SelectZoom.top;
				     Rect.left=m_SelectZoom.left;
				     Rect.bottom=m_SelectZoom.bottom;
			         Rect.right=m_SelectZoom.right;
				   }
				   else
				   {
					 Rect.bottom=(point.y)*(pData->m_nZoomFactor)+nPos2;
	    	         Rect.right=(point.x)*(pData->m_nZoomFactor)+nPos1;
				   }
				}
			}
		  }
    
		m_SelectZoom=Rect;
		if(m_SelectZoom.top>m_SelectZoom.bottom)
		{
		   nTemp = m_SelectZoom.bottom;
		   m_SelectZoom.bottom = m_SelectZoom.top;
		   Rect.bottom	= Rect.top;
		   m_SelectZoom.top	= nTemp;
		   Rect.top	= nTemp;
		}
   	   if(m_SelectZoom.left>m_SelectZoom.right)
		{
		  nTemp = m_SelectZoom.right;
		  m_SelectZoom.right = m_SelectZoom.left;
		  Rect.right= Rect.left;
		  m_SelectZoom.left = nTemp;
		  Rect.left	= nTemp;
		}

        if(m_SelectZoom.top<0)
		{
		   m_SelectZoom.top=0;
		}
		if(m_SelectZoom.left<0)
		{
		   m_SelectZoom.left=0;
		}
		if(m_SelectZoom.right>shuzu3)
		{
		   m_SelectZoom.right=shuzu3;
		}
		if(m_SelectZoom.bottom>shuzu5)
		{
		   m_SelectZoom.bottom=shuzu5;
		}

		tempRect.top	= m_SelectZoom.top*10;
		tempRect.left	= m_SelectZoom.left*10;
		tempRect.right	= m_SelectZoom.right*10;
		tempRect.bottom = m_SelectZoom.bottom*10;

		if(tempRect.top<0)
		{
		  tempRect.top = 0;
		}
		if(tempRect.left<0)
		{
		  tempRect.left = 0;
		}
       
	    m_pPositionInfo->SetPosition(tempRect,0);
			
		bTrack=FALSE;
       	H=FALSE;
		V=FALSE;
		L=FALSE;

        //释放鼠标
		SetCapture();
		ReleaseCapture();
		
        char str[36];

        GetWindowsDirectory(InitDir2,sizeof(InitDir2));
	    lstrcat(InitDir2,"\\twain_32\\MTIScanner\\jiaose.ini"); 
        sprintf(str, "%d", m_SelectZoom.left);
	    WritePrivateProfileString("select", "left", str, InitDir2);
	    sprintf(str, "%d", m_SelectZoom.right);
        WritePrivateProfileString("select", "right", str, InitDir2);
	    sprintf(str, "%d", m_SelectZoom.top);
	    WritePrivateProfileString("select", "top", str, InitDir2);
	    sprintf(str, "%d",m_SelectZoom.bottom );
	    WritePrivateProfileString("select", "bottom", str, InitDir2);
	  
        pScanner->SetSelectZoom(tempRect);
        InvalidateContainers();
       OnTimer(1);
	  }
	    break;
    //此时,鼠标为其它形状时,程序不处理
	 case CT_ZOOMIN:
	    break;
     case CT_HAND: 
        //::SetCursor(theApp.LoadCursor(IDC_HAND));
         bTrackHand=FALSE; 
		 SetCapture();
		 ReleaseCapture();
		break;
	 default:
	   break;
	}

}


void CViewWnd::OnCancelMode() 
{
	CWnd::OnCancelMode();
}

//////////////////////////////////////////////////////////////////
//按下SHIFT键改变鼠标形状以进行缩放操作,响应键盘按下消息        //                       //
//////////////////////////////////////////////////////////////////
void CViewWnd::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags) 
{
  switch(nChar)
  {
	case VK_SHIFT:
		if (pViewWnd->m_iCursorType == CT_ZOOMIN)
		{
		  m_iCursorType = CT_ZOOMOUT;
		  ::SetCursor(theApp.LoadCursor(203));
		}
	default:
		break;
  }
  CWnd::OnKeyDown(nChar, nRepCnt, nFlags);
}

//////////////////////////////////////////////////////////////////
//抬起SHIFT键改变鼠标形状以进行缩放操作,响应键盘按下消息        //                       //
//////////////////////////////////////////////////////////////////
void CViewWnd::OnKeyUp(UINT nChar, UINT nRepCnt, UINT nFlags) 
{
  switch(nChar)
  {
	case VK_SHIFT:
		if(pViewWnd->m_iCursorType == CT_ZOOMOUT)
		{
		  m_iCursorType = CT_ZOOMIN;
		  ::SetCursor(m_curZoomIn);
		}
	default:
		break;
  }
  CWnd::OnKeyUp(nChar, nRepCnt, nFlags);
}

////////////////////////////////////////////////////////////////////////////
////使标尺、视区数据无效,以响应ON_PAINT消息,被其它需要刷新显示区的程序调用//                       //
////////////////////////////////////////////////////////////////////////////
void CViewWnd::InvalidateContainers()
{
	pHRulerWnd->InvalidateRect(NULL);
	pVRulerWnd->InvalidateRect(NULL);
	pViewWnd->InvalidateRect(NULL);
}

////////////////////////////////////////////////////////////////////////////
//画黑白流动选择扫描框                                                //
////////////////////////////////////////////////////////////////////////////
void CViewWnd::DrawBlackandWhiteLines(CClientDC* pDC,RECT SelectZoom,BOOL bWhite,BOOL bDash)
{
	CPen WhitePen( PS_SOLID, 1, RGB(255,255,255));
	CPen BlackPen( PS_SOLID, 1, RGB(0,0,0));;
	CPen* oldPen;
	short	OldROP;
	int i;

    //画白笔
	if(bWhite)
	{
	  oldPen=pDC->SelectObject( &WhitePen );
	  OldROP=pDC->SetROP2( R2_COPYPEN );
	}
    //画黑笔
	else
	{
	  pDC->SelectObject( &BlackPen );	
	  OldROP=pDC->SetROP2( R2_COPYPEN );
	}
    //画黑白线框以产生流动效果
	if(bDash)
	{
	   for(i=1;i<=(SelectZoom.right-SelectZoom.left)/10;i++)
	   {
		  pDC->MoveTo(SelectZoom.left-10+10*i,SelectZoom.top);
		  pDC->LineTo(SelectZoom.left-10+5+10*i,SelectZoom.top);
	   }
       //画从右上角到右下角的垂直线
	   for(i=1;i<=((SelectZoom.bottom-SelectZoom.top)/10);i++)
	   {
		  pDC->MoveTo((SelectZoom.right),10*i+SelectZoom.top-10);
		  pDC->LineTo((SelectZoom.right),5+10*i+SelectZoom.top-10);
	   }
	   //画从右下角到左下角的水平线
	   for(i=(SelectZoom.right-SelectZoom.left)/10;i>0;i--)
	   {
		  pDC->MoveTo(SelectZoom.left+10*i,SelectZoom.bottom);
		  pDC->LineTo(SelectZoom.left-5+10*i,SelectZoom.bottom);
	   }
	  //画从左下角到左上角的垂直线
 	   for(i=((SelectZoom.bottom-SelectZoom.top)/10);i>0;i--)
	   {
	  	  pDC->MoveTo(SelectZoom.left,10*i+SelectZoom.top);
		  pDC->LineTo(SelectZoom.left,10*i+SelectZoom.top-5);
	   }
	}	
	else
	{
		for(i=1;i<=(SelectZoom.right-SelectZoom.left)/10;i++)
		{
			pDC->MoveTo(10*i+5+SelectZoom.left-10,SelectZoom.top);
			pDC->LineTo(10*i+10+SelectZoom.left-10,SelectZoom.top);
		}
		for(i=1;i<=(SelectZoom.bottom-SelectZoom.top)/10;i++)
		{
			pDC->MoveTo(SelectZoom.right,10*i+5+SelectZoom.top-10);
			pDC->LineTo(SelectZoom.right,10+10*i+SelectZoom.top-10);
		}
		for(i=(SelectZoom.right-SelectZoom.left)/10;i>0;i--)
		{
			pDC->MoveTo(10*i+SelectZoom.left-5,SelectZoom.bottom);
			pDC->LineTo(10*i+SelectZoom.left-10,SelectZoom.bottom);
		}
		for(i=(SelectZoom.bottom-SelectZoom.top)/10;i>0;i--)
		{
			pDC->MoveTo(SelectZoom.left,10*i+SelectZoom.top-5);
			pDC->LineTo(SelectZoom.left,10*i+SelectZoom.top-10);
		}
	}//End of if(bDash)

	pDC->SetROP2(OldROP);
	pDC->SelectObject( oldPen );
}

////////////////////////////////////////////////////////////////////////////
//响应系统时钟,调用上面流动扫描框函数                                //
////////////////////////////////////////////////////////////////////////////
void CViewWnd::OnTimer(UINT nIDEvent) 
{
	CClientDC	DC(this);
	CPen WhitePen( PS_SOLID, 1, RGB(255,255,255));
	CPen BlackPen( PS_SOLID, 1, RGB(  0,  0,  0));

	CBrush Brush2;
	CPoint point;
	static bDraw=TRUE;

	if(nIDEvent==1)
	{
	   if(bDraw) //从黑线开始画
	   {
		 DrawBlackandWhiteLines(&DC,m_SelectZoom,TRUE,TRUE);
		 DrawBlackandWhiteLines(&DC,m_SelectZoom,FALSE,FALSE);
		 bDraw=FALSE;
	   }
	  else
	  {
		//从黑线开始画虚线框
	     DrawBlackandWhiteLines(&DC,m_SelectZoom,TRUE,FALSE);
		 DrawBlackandWhiteLines(&DC,m_SelectZoom,FALSE,TRUE);
		 bDraw=TRUE;
	  }
	}
}

////////////////////////////////////////////////////////////////////////////
//画矩形框,被CPosition调用,用来实现通过信息框输入扫描框的时候,画扫描框.   //
////////////////////////////////////////////////////////////////////////////
void CViewWnd::DrawRect(RECT re)
{
	int left,top,right,bottom;
    CFile myFile;
	
	left=re.left/10;
	top=re.top/10;
	right=re.right/10;
	bottom=re.bottom/10;

	if((left<0)||(top<0)||(right>shuzu3)||(bottom>shuzu5))
	{
      if(left<0)
	  {
		left=0;
	  }
	  if(top<0)
	  {
	    top=0;
	  }

      if(right>shuzu3)
	  {
		right=shuzu3;
	  }
	  if(bottom>shuzu5)
	  {
		 bottom=shuzu5;
	  }
	}
	m_SelectZoom.left=left;
    m_SelectZoom.top=top;
	m_SelectZoom.right=right;
	m_SelectZoom.bottom=bottom;

	InvalidateContainers();
}
123

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