我想要一个自定义进度条控件,例如显示一些移动的斜线或像这样或在进度条控件内绘制图像。我已经在网上搜索了一些关于列表视图和动态子类的自定义绘图示例,但代码没有调用绘图方法:
public:
BOOL SubclassWindow(HWND hWnd)
{
ATLASSERT(m_hWnd==NULL);
ATLASSERT(::IsWindow(hWnd));
BOOL bRet = CWindowImpl<CMyProgressControl, CProgressBarCtrl>::SubclassWindow(hWnd);
return bRet;
}
BEGIN_MSG_MAP(CMyProgressControl)
CHAIN_MSG_MAP(CCustomDraw<CMyProgressControl>)
END_MSG_MAP()
DWORD OnPrePaint(int /*idCtrl*/, LPNMCUSTOMDRAW /*lpNMCustomDraw*/)
{
return CDRF_NOTIFYITEMDRAW;
}
DWORD OnItemPrePaint(int /*idCtrl*/, LPNMCUSTOMDRAW lpNMCustomDraw)
{
NMLVCUSTOMDRAW* pLVCD = reinterpret_cast<NMLVCUSTOMDRAW*>( lpNMCustomDraw );
// This is the prepaint stage for an item. Here's where we set the
// item's text color. Our return value will tell Windows to draw the
// item itself, but it will use the new color we set here for the background
COLORREF crText;
crText = RGB(200,200,255);
// Store the color back in the NMLVCUSTOMDRAW struct.
pLVCD->clrTextBk = crText;
// Tell Windows to paint the control itself.
return CDRF_DODEFAULT;
}