zoukankan      html  css  js  c++  java
  • MFC简单的橡皮筋程序

    void CMainWindow::OnLButtonDown(UINT nFlags,CPoint point)
    {
        //以下三个是在CMainWindow中定义
        m_ptFrom=point;
        m_ptTo=point;
        m_track=TRUE;
    
    }
    
    void CMainWindow::OnLButtonUp(UINT nFlags,CPoint point){
        m_ptTo=point;
        CPen pen;
        pen.CreatePen(PS_SOLID,16,RGB(255,0,0));
    
        CClientDC dc(this);
        dc.SelectObject(&pen);
        dc.MoveTo(m_ptFrom);
        dc.LineTo(m_ptTo);
        m_track=FALSE;
    }
    
    void CMainWindow::OnMouseMove(UINT nFlags,CPoint point){
        CDC *pDC;
        CClientDC dc(this);
        
        pDC=&dc;
        if(m_track){
            int nOldMode=pDC->SetROP2(R2_NOT);
            pDC->MoveTo(m_ptFrom);
            pDC->LineTo(m_ptTo);
            pDC->SetROP2(nOldMode);
    
            
            nOldMode=pDC->SetROP2(R2_NOT);//防止线重叠时被擦除
            pDC->MoveTo(m_ptFrom);
            pDC->LineTo(point);
            pDC->SetROP2(nOldMode); m_ptTo
    =point; } }
  • 相关阅读:
    F
    D
    J
    M
    H
    L
    Android线程之间的通讯
    Java4Android基础学习之异常
    Java4Android基础学习之接口
    Java4Android基础学习之包与访问权限
  • 原文地址:https://www.cnblogs.com/duyy/p/3772734.html
Copyright © 2011-2022 走看看