//方法一:通过集合类CPtrArray保存点的坐标
响应WM_LBUTTONUP消息 在OnButtonUp()函数的代码
CClientDC dc(this);
//获得透明画刷并选中
CBrush* brush=CBrush::FromHandle((HBRUSH)GetStockObject(NULL_BRUSH));m_ptrArray.Add(graph); //将CGraphic对象添加到CPtrArray集合类对象中保存起来
响应WM_PAINT消息 在OnDraw()函数的代码
//创建透明画刷并且选中
CBrush* brush=CBrush::FromHandle((HBRUSH)GetStockObject(NULL_BRUSH));
pDC->SelectObject(brush);
//通过循环将集合类对象中保存的点坐标取出
for(int i=0;i<m_ptrArray.GetSize();i++)
{
switch(((CGraphic*)m_ptrArray.GetAt(i))->m_gType)
{
case 1:
pDC->SetPixel(((CGraphic*)m_ptrArray.GetAt(i))->m_pEnd,RGB(255,0,0));
break;
case 2:
pDC->MoveTo(((CGraphic*)m_ptrArray.GetAt(i))->m_pOrigin );
pDC->LineTo(((CGraphic*)m_ptrArray.GetAt(i))->m_pEnd);
break;
case 3:
pDC->Rectangle(CRect(((CGraphic*)m_ptrArray.GetAt(i))->m_pOrigin,((CGraphic*)m_ptrArray.GetAt(i))->m_pEnd));
break;
case 4:
pDC->Ellipse(CRect(((CGraphic*)m_ptrArray.GetAt(i))->m_pOrigin,((CGraphic*)m_ptrArray.GetAt(i))->m_pEnd));
break;
}
}
*/