问题描述

VC，很急、很急，求救！！

VC++ 6.0 中怎么使在View类视图上给绘制的网格线、图形、坐标轴等，在滚动条滚动时依旧能够显示，即重绘！！

解决方案

如果你肯采纳我的回答，我可以写一个完整的例子给你。不过一个问题我只能挑一样做给你。比如演示下网格线和滚动视图的绘制。如果要全回答，最好你分开问。

解决方案二：

就是GDI绘图，现在绘制后有什么具体的问题？

解决方案三：

 void CQ185823View::OnDraw(CDC* pDC)
{
    CQ185823Doc* pDoc = GetDocument();
    ASSERT_VALID(pDoc);
    // TODO: add draw code for native data here
    CPen pen1(PS_SOLID, 1, RGB(191, 191, 191));
    CPen pen2(PS_SOLID, 1, RGB(0, 0, 0));
    for (int i = 0; i <= 400; i++)
    {
        if (i % 10 == 0)
        {
            RECT rect;
            rect.left = 2001;
            rect.right = 2001 + 100;
            rect.top = i * 10;
            rect.bottom = i * 10 + 100;
            char num[10];
            itoa(i / 10 - 20, num, 10);
            pDC->DrawText(num, strlen(num), &rect, 0);
        }
        if (i % 10 != 0)
        {
            pDC->SelectObject(pen1);
        }
        else
        {
            pDC->SelectObject(pen2);
        }
        pDC->MoveTo(0, i * 10);
        pDC->LineTo(4000, i * 10);
    }
    for (i = 0; i <= 400; i++)
    {
        if (i % 10 == 0)
        {
            RECT rect;
            rect.left = i * 10;
            rect.right = i * 10 + 100;
            rect.top = 2001;
            rect.bottom = 2001 + 100;
            char num[10];
            itoa(i / 10 - 20, num, 10);
            pDC->DrawText(num, strlen(num), &rect, 0);
        }
        if (i % 10 != 0)
        {
            pDC->SelectObject(pen1);
        }
        else
        {
            pDC->SelectObject(pen2);
        }
        pDC->MoveTo(i * 10, 0);
        pDC->LineTo(i * 10, 4000);
    }
}

void CQ185823View::OnInitialUpdate()
{
    CScrollView::OnInitialUpdate();

    CSize sizeTotal;
    // TODO: calculate the total size of this view
    sizeTotal.cx = sizeTotal.cy = 4000;
    SetScrollSizes(MM_TEXT, sizeTotal);
    POINT pt;
    RECT rect;
    GetClientRect(&rect);
    pt.x = 2000 - (rect.right - rect.left) / 2;
    pt.y = 2000 - (rect.bottom - rect.top) / 2;
    ScrollToPosition(pt);
}

解决方案四：