4.VC按钮显示图片

Posted 2020-07-08

1.方法1: 加载BITMAP显示，缺点是:图片固定大小，不会自动拉伸

//资源文件里导入一张BITMAP，如 IDC_BITMAP1
//设置Button的Bitmap 属性为 TRUE


//.cpp
CBitmap PpBitmap = new CBitmap(); //创建图片对象
pBitmap->LoadBitmapA(IDB_BITMAP1); //从资源中加载图片

HBITMAP hBitmap = (HBITMAP)pBitmap->Detach();
m_btn1.SetBitmap(hBitmap); //按钮显示图片

 

2.方法2 在DrawItem里自绘按钮

//将Button的 Owner Draw属性设置为TRUE
//在父窗口重载 虚函数 ON_WM_DRAWITEM -> OnDrawItem

void xxxDlg::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
    if (nIDCtl == IDC_BUTTON2)
    {
        //绘制按钮框架
        UINT uStyle = DFCS_BUTTONPUSH;
        //是否按下去了
        if (lpDrawItemStruct->itemState & ODS_SELECTED )
        {
            uStyle |= DFCS_PUSHED;
        }

        CDC dc;
        dc.Attach(lpDrawItemStruct->hDC);
        dc.DrawFrameControl(&lpDrawItemStruct->rcItem, DFC_BUTTON, uStyle);
        //输出文字
        dc.SelectObject(&m_font);
        dc.SetTextColor(RGB(0,0, 255));

        CString strText;
        strText = _T("Sylar Test");
        dc.TextOut(lpDrawItemStruct->rcItem.left + 40, lpDrawItemStruct->rcItem.top + 25, strText);
        //是否得到焦点
        if (lpDrawItemStruct->itemState & ODS_FOCUS)
        {
            //画虚框
            CRect rcFocus = lpDrawItemStruct->rcItem;
            rcFocus.DeflateRect(3, 3);
            dc.DrawFocusRect(&rcFocus);
        }
        return;
    }

    CDialogEx::OnDrawItem(nIDCtl, lpDrawItemStruct);
}

//字体设置
CFont m_font;
m_font.CreatePointFont(100, _T("宋体"), NULL);

 

3.方法3 继承CButton类，自己实现.