大虾求救.急急急急!!高分求解!! 与重画有关的简单问题. 不要用Invalidate(TRUE) ,用InvalidateRect(...),指定要刷新的区域,只要包含你的线就可以了,区域越小,闪烁就越小。 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 可以用内存DC。先画在他上面,然后BitBlt.结合楼上的用法更好。 _________| A || ___|___| | C | |____|___| | | B | |-------|C = A交BIInvalidateRect( a.left, a.top, a.rigth, c.top);InvalidateRect( a.left, c.top, b.rigth, c.bottom);InvalidateRect( c.left, c.bottom, b.rigth, b.bottom); to yaw() and hooligan(风)我试了你们的方法,但是自己又时画的线也被重画掉了 CRect rect; GetWindowRect(&rect); InvalidateRect(CRect(oldpoint.x-1,0,oldpoint.x+1,rect.Height()),FALSE); InvalidateRect(CRect(0,oldpoint.y-1,rect.Width(),oldpoint.y+1),FALSE); CDC * pDC=GetDC();// m_pChart->DoDraw(pDC, &m_DragInfo ); CPen pen(PS_SOLID,1,RGB(180,180,180)); CPen *oldPen; oldPen=pDC->SelectObject(&pen); pDC->MoveTo(CPoint(point.x,0)); pDC->LineTo(CPoint(point.x,rect.Height())); pDC->MoveTo(CPoint(0,point.y)); pDC->LineTo(CPoint(rect.Width(),point.y)); pDC->SelectObject(oldPen); 是这个样子的,你应该把画线的代码放在OnDraw里 然后在OnMouseMove中调InvalidateRect() 利用光栅操作(异或操作,画两次同样的线就会擦除),在鼠标移动消息时先重画要擦掉的线再画现在要的线,void DrawLine(CDC *pDC,CPoint point){ int oldrop=pDC->SetROP2(R2_NOTXORPEN); CPen pen(PS_DOT,1,RGB(192,192,192)); CPen*oldpen=pDC->SelectObject(&pen); pDC->MoveTo(CPoint(point.x,0)); pDC->LineTo(CPoint(point.x,rect.Height())); pDC->MoveTo(CPoint(0,point.y)); pDC->LineTo(CPoint(rect.Width(),point.y)); pDC->SetROP2(oldrop); pDC->SelectObject(oldpen);}这样不用重新刷新,就不会闪屏了 to hooligan(风) 试了,还是不行 CRect rect;GetWindowRect(&rect);CClientDC pDC(this);CPen *oldPen;InvalidateRect(NULL,true);this->UpdateWindow();CPen pen(PS_SOLID,1,RGB(180,180,180));oldPen = pDC.SelectObject(&pen);pDC.MoveTo(CPoint(point.x,0));pDC.LineTo(CPoint(point.x,rect.Height()));pDC.MoveTo(CPoint(0,point.y));pDC.LineTo(CPoint(rect.Width(),point.y));pDC.SelectObject(oldPen);试试这个吧:)应该可以的 CreateDialogIndirect() 练习用钩子注入Dll运到的问题 惊天神话-==>>> 内存泄漏 -324541 Byte,高分请高手指导! 我的程序只有Release呢?怎样才能添加Debug调试环境? 在分割窗口后,如何让每个窗口高度为整个窗口高度的一半?代码是... 如何新建一个不显示在工具栏的窗口? 我这样使用有区别吗? 如何用CRecordset修改数据? 送分的问题 一个小问题。答对给高分,决不失言 请问vtoolsd是个什么东东!!! 请您帮忙解决两个问题,不要再让我失望!
| A |
| ___|___
| | C | |
____|___| |
| B |
|-------|C = A交BI
InvalidateRect( a.left, a.top, a.rigth, c.top);
InvalidateRect( a.left, c.top, b.rigth, c.bottom);
InvalidateRect( c.left, c.bottom, b.rigth, b.bottom);
我试了你们的方法,但是自己又时画的线也被重画掉了
CRect rect;
GetWindowRect(&rect);
InvalidateRect(CRect(oldpoint.x-1,0,oldpoint.x+1,rect.Height()),FALSE);
InvalidateRect(CRect(0,oldpoint.y-1,rect.Width(),oldpoint.y+1),FALSE);
CDC * pDC=GetDC();
// m_pChart->DoDraw(pDC, &m_DragInfo );
CPen pen(PS_SOLID,1,RGB(180,180,180));
CPen *oldPen;
oldPen=pDC->SelectObject(&pen);
pDC->MoveTo(CPoint(point.x,0));
pDC->LineTo(CPoint(point.x,rect.Height()));
pDC->MoveTo(CPoint(0,point.y));
pDC->LineTo(CPoint(rect.Width(),point.y));
pDC->SelectObject(oldPen);
void DrawLine(CDC *pDC,CPoint point)
{
int oldrop=pDC->SetROP2(R2_NOTXORPEN);
CPen pen(PS_DOT,1,RGB(192,192,192));
CPen*oldpen=pDC->SelectObject(&pen);
pDC->MoveTo(CPoint(point.x,0));
pDC->LineTo(CPoint(point.x,rect.Height()));
pDC->MoveTo(CPoint(0,point.y));
pDC->LineTo(CPoint(rect.Width(),point.y));
pDC->SetROP2(oldrop);
pDC->SelectObject(oldpen);
}
这样不用重新刷新,就不会闪屏了
试了,还是不行
GetWindowRect(&rect);
CClientDC pDC(this);
CPen *oldPen;
InvalidateRect(NULL,true);
this->UpdateWindow();
CPen pen(PS_SOLID,1,RGB(180,180,180));
oldPen = pDC.SelectObject(&pen);
pDC.MoveTo(CPoint(point.x,0));
pDC.LineTo(CPoint(point.x,rect.Height()));
pDC.MoveTo(CPoint(0,point.y));
pDC.LineTo(CPoint(rect.Width(),point.y));
pDC.SelectObject(oldPen);
试试这个吧:)应该可以的