vc2008中MFC输出矩形、圆、三角形,并且三者变换
hshpm 2009-07-27 10:08:05 代码如下:
在view类加变量int ituxing,并在构造函数里赋值为ituxing=0;
在OnDraw(CDC* pDC)函数上添上以下语句:
void CMy1_1View::OnDraw(CDC* pDC)
{
CMy1_1Doc* pDoc = GetDocument();
ASSERT_VALID(pDoc);
// TODO: add draw code for native data here
//清除当前图形
CBrush mybrush1;
mybrush1.CreateSolidBrush(RGB(255,255,255));
CRect myrect1(0,0,1024,768);
pDC->FillRect(myrect1,&mybrush1);
//判断当前图形ituxing
if(ituxing==1)
//ituxing=1,画矩形
pDC->Rectangle(20,20,89,89);
else if(ituxing==2)
//ituxing=2,画圆
pDC->Ellipse(20,20,89,89);
else
//否则,画三角形
{
pDC->MoveTo(20,20);
pDC->LineTo(89,45);
pDC->LineTo(20,89);
pDC->LineTo(20,20);
}
}
d. 添加OnTimer(UINT nIDEvent)和OnCreate(LPCREATESTRUCT lpCreateStruct),并加上语句如下:
void CMy1_1View::OnTimer(UINT nIDEvent)
{
// TODO: Add your message handler code here and/or call default
//获取指针pdc
CDC *pDC=GetDC();
//调用OnDraw(pDC)重画
OnDraw(pDC);
//使ituxing循环
ituxing=(ituxing+1)%3;
CView::OnTimer(nIDEvent);
}
int CMy1_1View::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
if (CView::OnCreate(lpCreateStruct) == -1)
return -1;
// TODO: Add your specialized creation code here
//设置更新时间
SetTimer(1, 750, NULL);
return 0;
}
运行结果就只显示一个三角形,不能变换其他图形。代码是网上下载的VC++游戏编程这电子书里面的!