文章类型: VC&C++
关键词: VC中CListCtrl使用技巧,,listview,report,processing,null,menu,扩展
内容摘要: VC中CListCtrl使用技巧

VC中CListCtrl使用技巧

2016/11/15 8:40:56    来源:apple    阅读:

1.      CListCtrl 风格

LVS_ICON: 为每个item显示大图标

    LVS_SMALLICON: 为每个item显示小图标

    LVS_LIST: 显示一列带有小图标的item

    LVS_REPORT: 显示item详细资料

    直观的理解:windows资源管理器,“查看”标签下的“大图标,小图标,列表,详细资料”

2.      设置listctrl 风格及扩展风格

LONG lStyle;

    lStyle = GetWindowLong(m_list.m_hWnd, GWL_STYLE);//获取当前窗口style

    lStyle &= ~LVS_TYPEMASK; //清除显示方式位

    lStyle |= LVS_REPORT; //设置style

    SetWindowLong(m_list.m_hWnd, GWL_STYLE, lStyle);//设置style

 

    DWORD dwStyle = m_list.GetExtendedStyle();

    dwStyle |= LVS_EX_FULLROWSELECT;//选中某行使整行高亮(只适用与report风格)

    dwStyle |= LVS_EX_GRIDLINES;//网格线(只适用与report风格的listctrl

    dwStyle |= LVS_EX_CHECKBOXES;//item前生成checkbox控件

m_list.SetExtendedStyle(dwStyle); //设置扩展风格

 

注:listviewstyle请查阅msdn

3.      插入数据

    m_list.InsertColumn( 0, "ID", LVCFMT_LEFT, 40 );//插入列

m_list.InsertColumn( 1, "NAME", LVCFMT_LEFT, 50 );

    int nRow = m_list.InsertItem(m_list.GetItemCount(), 11);//插入行

m_list.SetItemText(nRow, 1, jacky);//设置数据

PMyDataType p = (PMyDataType)malloc(sizoef(MyDataType));

p->I = 100;

m_list.SetItemData(nRow,(DWORD)p);//给行设置用户数据

4.      一直选中item

    选中style中的Show selection always,或者在上面第2点中设置LVS_SHOWSELALWAYS

5.      选中和取消选中一行

    int nIndex = 0;

    //选中

    m_list.SetItemState(nIndex, LVIS_SELECTED|LVIS_FOCUSED, LVIS_SELECTED| LVIS_FOCUSED);

    //取消选中

    m_list.SetItemState(nIndex, 0, LVIS_SELECTED|LVIS_FOCUSED);

6.      得到listctrl中所有行的checkbox的状态

    m_list.SetExtendedStyle(LVS_EX_CHECKBOXES);

    CString str;

    for(int i=0; i<m_list.GetItemCount(); i++)

    {

                     if( m_list.GetItemState(i, LVIS_SELECTED) == LVIS_SELECTED|| m_list.GetCheck(i))

{

                         str.Format(_T("%d行的checkbox为选中状态"), i);

                          AfxMessageBox(str);

              }

    }

7.      得到listctrl中所有选中行的序号

得到listctrl中所有选中行的序号有如下方法。

Ø         方法一:

       CString str;

       for(int i=0; i<m_list.GetItemCount(); i++)

       {

           if( m_list.GetItemState(i, LVIS_SELECTED) == LVIS_SELECTED )

           {

               str.Format(_T("选中了第%d"), i);

               AfxMessageBox(str);

           }

       }

Ø         方法二:

        POSITION pos = m_list.GetFirstSelectedItemPosition();

        if (pos == NULL)

             TRACE0("No items were selected!/n");

        else

        {

             while (pos)

             {

                  int nItem = m_list.GetNextSelectedItem(pos);

                  TRACE1("Item %d was selected!/n", nItem);

                  // you could do your own processing on nItem here

             }

        }

8.      得到item的信息

    TCHAR szBuf[1024];

    LVITEM lvi;

    lvi.iItem = nItemIndex;

    lvi.iSubItem = 0;

    lvi.mask = LVIF_TEXT;//请在这里设置你所感兴趣的信息类型

    lvi.pszText = szBuf;

    lvi.cchTextMax = 1024;

    m_list.GetItem(&lvi);

9.      得到listctrl的所有列的header字符串内容

   LVCOLUMN lvcol;

   char    str[256];

   int     nColNum;

   CString    strColumnName[4];//假如有4

   nColNum = 0;

   lvcol.mask = LVCF_TEXT;

   lvcol.pszText = str;

   lvcol.cchTextMax = 256;

   while(m_list.GetColumn(nColNum, &lvcol))

   {

       strColumnName[nColNum] = lvcol.pszText;

       nColNum++;

   }

10.  使listctrl中一项可见,即滚动滚动条

    m_list.EnsureVisible(i, FALSE);

11.  得到listctrl列数

    int nHeadNum = m_list.GetHeaderCtrl()->GetItemCount();

12.  删除所有列

删除所有列有如下方法:

Ø         方法一:

       while ( m_list.DeleteColumn (0))

       因为你删除了第一列后,后面的列会依次向上移动。

Ø         方法二:

       int nColumns = 4;

       for (int i=nColumns-1; i>=0; i--)

          m_list.DeleteColumn (i);

13.  得到单击的listctrl的行列号

    添加listctrl控件的NM_CLICK消息相应函数

    void CTest6Dlg::OnClickList1(NMHDR* pNMHDR, LRESULT* pResult)

    {

        // 方法一:

        /*

        DWORD dwPos = GetMessagePos();

        CPoint point( LOWORD(dwPos), HIWORD(dwPos) );

        m_list.ScreenToClient(&point);

  

        LVHITTESTINFO lvinfo;

        lvinfo.pt = point;

        lvinfo.flags = LVHT_ABOVE;

    

        int nItem = m_list.SubItemHitTest(&lvinfo);

        if(nItem != -1)

        {

            CString strtemp;

            strtemp.Format("单击的是第%d行第%d", lvinfo.iItem, lvinfo.iSubItem);

            AfxMessageBox(strtemp);

        }

        */

        // 方法二:

        /*

        NM_LISTVIEW* pNMListView = (NM_LISTVIEW*)pNMHDR;

        if(pNMListView->iItem != -1)

        {

            CString strtemp;

            strtemp.Format("单击的是第%d行第%d",

            pNMListView->iItem, pNMListView->iSubItem);

            AfxMessageBox(strtemp);

        }

        */

        *pResult = 0;

    }

14.  判断是否点击在listctrlcheckbox

    添加listctrl控件的NM_CLICK消息相应函数

    void CTest6Dlg::OnClickList1(NMHDR* pNMHDR, LRESULT* pResult)

    {

       DWORD dwPos = GetMessagePos();

CPoint point( LOWORD(dwPos), HIWORD(dwPos) );

 

       m_list.ScreenToClient(&point);

  

       LVHITTESTINFO lvinfo;

       lvinfo.pt = point;

       lvinfo.flags = LVHT_ABOVE;

    

       UINT nFlag;

       int nItem = m_list.HitTest(point, &nFlag);

       //判断是否点在checkbox

       if(nFlag == LVHT_ONITEMSTATEICON)

       {

          AfxMessageBox("点在listctrlcheckbox");

       }

       *pResult = 0;

    }

15.  右键点击listctrlitem弹出菜单

    添加listctrl控件的NM_RCLICK消息相应函数

    void CTest6Dlg::OnRclickList1(NMHDR* pNMHDR, LRESULT* pResult)

    {

       NM_LISTVIEW* pNMListView = (NM_LISTVIEW*)pNMHDR;

       if(pNMListView->iItem != -1)

       {

          DWORD dwPos = GetMessagePos();

          CPoint point( LOWORD(dwPos), HIWORD(dwPos) );

          CMenu menu;

          VERIFY( menu.LoadMenu( IDR_MENU1 ) );

          CMenu* popup = menu.GetSubMenu(0);

          ASSERT( popup != NULL );

          popup->TrackPopupMenu(TPM_LEFTALIGN | TPM_RIGHTBUTTON, point.x, point.y, this );

       }

       *pResult = 0;

}

16.  处理listctrlitem的变化通知

添加listctrl控件的LVN_ITEMCHANGED消息相应函数

void CListCtrlTestDlg::OnItemchangedList1(NMHDR* pNMHDR, LRESULT* pResult)

{

       NM_LISTVIEW* pNMListView = (NM_LISTVIEW*)pNMHDR;

       // TODO: Add your control notification handler code here

       if (pNMListView->uChanged == LVIF_STATE)

       {

              if ((pNMListView->uNewState)&&(pNMListView->iItem>=0))

              {

                     char ch[10];

                     CString sNot;

                     switch(pNMListView->uNewState)

                     {

                     case 4096://新增

                            itoa(pNMListView->iItem,ch,10);

                            sNot = "新增一行(";

                            sNot += ch;

                            sNot += "";

                            AfxMessageBox(sNot);

                            break;

                     case 3://被选中

                            itoa(pNMListView->iItem,ch,10);

                            sNot = "行(";

                            sNot += ch;

                            sNot += ")被选中";

                            AfxMessageBox(sNot);

                            break;

                     }

              }

       }

       *pResult = 0;

}

17.  删除所有先中行

CListCtrl* pListCtrl = (CListCtrl*) GetDlgItem(IDC_TESTLIST);

ASSERT(pListCtrl != NULL);


for( int i = pListCtrl->GetItemCount() - 1; i >= 0; --i )

{

    if( pListCtrl->GetItemState( i, LVIS_SELECTED ) == LVIS_SELECTED )

       pListCtrl->DeleteItem( i );

}

18.  选中某一行

m_rList.EnsureVisible(nItem,  FALSE); 

m_rList.SetItemState(nItem,LVNI_SELECTED,LVNI_SELECTED);

m_rList.SetFocus();

19.  大数据操作

我们发现用ClistCtrl进入大量的数据插入或删除时所需时间特别长;这时我们可以用如下办法来提高程序的执行速度,同时也避免了窗口的闪烁;步骤如下:

一、先锁定窗口,不进行刷新

m_rList.LockWindowUpdate();

二、设定列表不进行重画

m_rList.SetRedraw(FALSE);

三、清空列表,删除历史数据

while (m_rList.DeleteColumn (0))

四、窗口解锁,允许刷新。否则系统的视图也会进行闪烁

m_rList.UnlockWindowUpdate();

五、向列表中循环增加记录

for( int i=0; i<10000; i++ )

{

       int nRow = m_rList.InsertItem(m_rList.GetItemCount(), 11);

}

六、重画列表

m_rList.SetRedraw(TRUE);

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