MFC绘制按钮

BirdsHover — Thu, 15 Jan 2009 04:41:00 GMT

界面上添加一个按钮，把按钮设置为Owner Draw = true;
添加WM_DRAWITEM消息映射，映射函数为OnDrawItem

void CmfcAppDlg::OnDrawItem(int nIDCtl, LPDRAWITEMSTRUCT lpDrawItemStruct)
{
    // TODO: 在此添加消息处理程序代码和/或调用默认值
    CDC ButtonDC;
    CRect rc;
    ButtonDC.Attach(lpDrawItemStruct->hDC);
    //清空绘制
    ButtonDC.FloodFill(0,0,TRANSPARENT);
    rc = lpDrawItemStruct->rcItem;
    //按钮状态
    UINT state = lpDrawItemStruct->itemState;
    //绘制一个边框
    ButtonDC.Draw3dRect(rc,0x0,0x100);
    //背景色透明
    ButtonDC.SetBkMode(TRANSPARENT);
    //当按钮为焦点状态
    if(state & ODS_FOCUS){
        CString str = L"焦点状态";
        ButtonDC.DrawText(str,str.GetLength(),&rc,DT_CENTER | DT_VCENTER | DT_SINGLELINE);
    }else{
        CString str = L"失去焦点";
        ButtonDC.DrawText(str,str.GetLength(),&rc,DT_CENTER | DT_VCENTER | DT_SINGLELINE);
    }
    CDialog::OnDrawItem(nIDCtl, lpDrawItemStruct);
}

BirdsHover 2009-01-15 12:41 发表评论

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MFC绘制按钮