二次开发-标尺功能实现方法：

qiang

标尺功能实现方法：
*调用Tool_opr.dll动态库。
*代码调用：
1.在Frame窗口类的头文件中定义：
public:
CRuleSplitter m_Splitter;
2、在Frame 的
::OnCreateClient(LPCREATESTRUCT lpcs, CCreateContext* pContext)
{
m_Splitter.Initalize(this,RUNTIME_CLASS(CTestFrameView),lpcs,pContext);
//若开发者的程序为切分视结构，则调用：
m_Splitter.Initalize(&m_wndSplitter,RUNTIME_CLASS(CTestFrameView),lpcs,pContext,m_wndSplitter.IdFromRowCol(0, 1));
}
3、在view的ondraw中调用
int  *ipscreenPnts;
double  *dpGridpnts;
int  iNum,i;
D_DOT    ddTmp;
CPoint   ptTmp;

CRuleSplitter *par =(CRuleSplitter *)GetParent();
if(par->IsKindOf( RUNTIME_CLASS( CRuleSplitter ) ))
   {
  if(par->GetSafeHwnd())
  {
   D_RECT drc;
   RECT   rc;
   _GetWinDispRect(&drc);
   GetClientRect(&rc);
   ClientToScreen(&rc);
   par->SetPicScreenMetrics(rc);
   par->SetRange(drc.xmax,drc.xmin,drc.ymax,drc.ymin);
   if (par->AdjustXGridArray(&ipscreenPnts,&dpGridpnts,&iNum))
   {
    for(i=0;i<iNum;i++)
    {
     ddTmp.x = dpGridpnts;
     ddTmp.y = DEF_PIXEL;
     _LpToWp(&ddTmp,&ptTmp);
     ClientToScreen(&ptTmp);
     ipscreenPnts = ptTmp.x;
    }
   }
   if (par->AdjustYGridArray(&ipscreenPnts,&dpGridpnts,&iNum))
   {
   
    for(i=0;i<iNum;i++)
    {
     ddTmp.x = DEF_PIXEL;
     ddTmp.y = dpGridpnts;
     _LpToWp(&ddTmp,&ptTmp);
     ClientToScreen(&ptTmp);
     ipscreenPnts = ptTmp.y;
    }
   }
   par->UpdateRuler();
  }
}

4、在PreTranslateMessage(MSG* pMsg)中调用
BOOL CTestFrameView:reTranslateMessage(MSG* pMsg)
{
CRuleSplitter *par =(CRuleSplitter *)GetParent();
if(par->IsKindOf( RUNTIME_CLASS( CRuleSplitter ) ))
{
  if(par->GetSafeHwnd())
  {
   par->RelayMsg(pMsg);
  }
}
return CGisEditView::PreTranslateMessage(pMsg);
}

edison3090

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行者——洲

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