在 MFC 中获取 CListCtrl 的行高

Question

我想将CListCtrl 的大小调整为Report，以便仅显示n 行带文本或为空的行。我需要一行的高度（它们都具有相同的大小和常数）。

CRect rect;
myList.GetWindowRect(&rect);
ScreenToClient(&rect);
myList.MoveWindow(rect.left, rect.top, rect.Width(), 16*8-5 /* TODO */);

Answer 1

具有可变行高的CListCtrl

/*
1a. Setup a typical CListCtrl with owner draw
1b. Fill the CListCtrl with the text you want, as you would normally
2. Setup a CListBox with OwnerDrawVariable and NO border
3. Make the ListBox a child of the ListCtrl
4. Use OnSize to position and OnDrawItem to display the text
Note the OnDrawItem is using the text and some parameters from the CListCtrl
so be mindful of m_lbTest vs. m_lcTest.
*/

void CTestDlg::FillListCtrl()
{
// fill CListCtrl with some text
int x,y;
int ColCount;
CString csStr;

    m_lbTest.SetParent(&m_lcTest);
    ColCount=m_lcTest.GetHeaderCtrl()->GetItemCount();
    for (y=0; y<10; y++) {
        m_lcTest.InsertItem(y,"");
        for (x=0; x<ColCount; x++) {
            csStr.Format("y=%d x=%d",y,x);
            m_lcTest.SetItemText(y,x,csStr);
        }

        m_lbTest.AddString("");
        m_lbTest.SetItemHeight(y,20 + y*10);
    }
}



void CTestDlg::OnSize(UINT nType, int cx, int cy)
{
int x,y;
CRect rb;

    if (m_lcTest.m_hWnd != NULL) {
        y=0;
        x=0;

        m_lcTest.SetWindowPos(&wndTop,x,y,cx,cy-y,SWP_NOZORDER);
        m_lcTest.GetHeaderCtrl()->GetClientRect(&rb);
        x=0;
        y+=rb.Height();
        m_lbTest.SetWindowPos(&wndTop,x,rb.Height(),cx-x-4,cy-y-4,SWP_NOZORDER);
    }
}


void CTestDlg::OnDrawItem(int nIDCtl, LPDRAWITEMSTRUCT lpD)
{
CString csStr;
CRect rc;
CRect rb;
UINT fmt;
LVCOLUMN lvc;
int x,y;
CDC dc;
int ColCount;
CPen cPen;

    CopyRect(&rc,&lpD->rcItem);
    dc.Attach(lpD->hDC);
    dc.SetBkMode(TRANSPARENT);
    dc.SelectObject(GetStockObject(DEFAULT_GUI_FONT));
    cPen.CreatecPen.CreatePen(PS_SOLID,1,RGB(192,192,192));
     dc.SelectObject(cPen);
    dc.SetTextColor(RGB(0,0,0));

    if (m_lbTest.m_hWnd!=NULL && nIDCtl==IDC_LB_TEST) {
         y=lpD->itemID;
        if (y >= 0) {
             rc.left+=5;
            ColCount=m_lcTest.GetHeaderCtrl()->GetItemCount();
             for (x=0; x<ColCount; x++){
                 rc.right=rc.left + m_lcTest.GetColumnWidth(x) - 10;

                 rb.top   =rc.top+1;
                 rb.bottom=rc.bottom;
                 rb.left     =rc.left - 5;
                 rb.right =rc.right + 4;

                if ((lpD->itemState&ODS_SELECTED) != 0) dc.FillSolidRect(&rb,RGB(255,255,192)); // light yellow
                else                    dc.FillSolidRect(&rb,RGB(255,255,255));

                 rb.top--;
                 dc.MoveTo(rb.left-1,rb.bottom);
                 dc.LineTo(rb.right, rb.bottom);
                 dc.LineTo(rb.right, rb.top);
                 dc.LineTo(rb.left-1,rb.top);

                 lvc.mask=LVCF_FMT;
                 m_lcTest.GetColumn(x,&lvc);
                 if      ((lvc.fmt&LVCFMT_RIGHT)  != 0) fmt=DT_RIGHT;
                 else if ((lvc.fmt&LVCFMT_CENTER) != 0) fmt=DT_CENTER;
                 else                                   fmt=DT_LEFT;
                 fmt|=DT_VCENTER | DT_SINGLELINE | DT_END_ELLIPSIS | DT_NOPREFIX;

                csStr=m_lcTest.GetItemText(y,x);
                dc.DrawText(csStr,&rc,fmt);

                 rc.left=rc.right + 10;
            }
        }
    }

    cPen.DeleteObject();
    dc.Detach();
}