实现类似VC中可设断点的编辑窗口
作者: cuick

下载本文示例源代码

运行效果图如下:



想做一个跟踪调试工具，于是到网上找类似VC可设置断点的EditView，可惜没找到（呵呵，俺E文不好，没去国外站点找）。那就自己做一个吧！！
唉！！为了这个小东西俺可是走了不少弯路！！
还好，今天终于做好了，拿出来与大家分享。

1、 创建一个工程………………俺不多说了，记住要选CeditView.
2、 在OnInitialUpdate()中设置EDIT的Margin，当然留出的空间用来画断点或行号等。并得到行高。

SIZE size;
GetTextExtentPoint(GetDC()->GetSafeHdc (),"A",1,&size);
m_LineHeight = size.cy;		//得到行的高度

CEdit& theEdit = GetEditCtrl ();
theEdit.SetMargins (m_LineHeight+6,0);	//设置编辑框的左边界
theEdit.SetLimitText(10 * 1024);	//设置输入的最大文本

AddRemoveBP(int point)
{
	IntList::iterator it;
	it = find(lBreakPoint.begin (), lBreakPoint.end (), point);

	if( it != lBreakPoint.end () ) 	//如果此行为设置了断点的行则删除否则添加
		lBreakPoint.erase (it);
	else
		lBreakPoint.push_back (point);
}

PaintLeft()
{
	CBrush brushb(RGB(245,245,230));
	int m_breakpoint;
	CDC* hdc;
	hdc = GetWindowDC();
	CRect rect;
	GetClientRect(&rect);
	hdc->FillRect (CRect(rect.left+2 ,rect.top+2 ,rect.left + m_LineHeight + 7,rect.Height ()+2),&brushb);//画底色
	brushb.DeleteObject ();

	CEdit& theEdit = GetEditCtrl ();
	int nFirstVisible = theEdit.GetFirstVisibleLine();	//得到当前显示的最上端的行号
	CBrush OrigBrush,brushf(RGB(255,0,0));
	CBrush *oldBrush = (CBrush*)hdc->SelectObject (brushf);
	OrigBrush.FromHandle((HBRUSH)oldBrush);

	IntList::iterator it;
	for(it = lBreakPoint.begin(); it != lBreakPoint.end(); it++)
	{
		m_breakpoint = *it;
		if(m_breakpoint > nFirstVisible)
		{
			int point = (m_breakpoint-1 - nFirstVisible)*m_LineHeight +3;	//计算断点位置
			
			if(point < (rect.bottom - m_LineHeight+1))
			{
				hdc->Ellipse(rect.left + 5, point, rect.left+ m_LineHeight + 4,point+m_LineHeight);//画断点
			}
		}
	}
	hdc->SelectObject (&OrigBrush);
	OrigBrush.DeleteObject();
	brushf.DeleteObject ();
}

if(point.x < m_LineHeight+6)
{
		point.x += 20;
		CEdit& theEdit = GetEditCtrl ();
		int n = theEdit.CharFromPos(point);
		AddRemoveBP(HIWORD(n)+1);
}

CEdit& theEdit = GetEditCtrl ();
int newpoint = theEdit.LineFromChar (-1) + 1;
AddRemoveBP(newpoint);