MFC 下拉框下拉条目宽高设置

有时候下拉框(MFC标准叫组合框,CComboBox)中条目文本很多,超过了下拉框的宽度,如果不加设置的话,超过的部分文本将无法显示,查找MSDN,发现解决方法,代码如下:

代码
// The pointer to my combo box.
extern CComboBox* pmyComboBox;

// Set the height of every item so the item
// is completely visible.
CString str;
CSize sz;
int dx=0;
CDC
* pDC = pmyComboBox->GetDC();
for (int i=0;i < pmyComboBox->GetCount();i++)
{
pmyComboBox
->GetLBText( i, str );
sz
= pDC->GetTextExtent(str);

// Only want to set the item height if the current height
// is not big enough.
if (pmyComboBox->GetItemHeight(i) < sz.cy)
pmyComboBox
->SetItemHeight( i, sz.cy );

// Only want to set the item width if the current width
// is not big enough.
if (pmyComboBox->GetDroppedWidth() < sz.cx)
{
pmyComboBox
->SetDroppedWidth(sz.cx + 20);
}
}
pmyComboBox
->ReleaseDC(pDC);

 

效果图:

posted @ 2010-05-10 16:48  stuarts  Views(1447)  Comments(0Edit  收藏  举报