CListCtrl 使用小结
1. 常用初始化
CListCtrl* pList = (CListCtrl*)GetDlgItem(IDC_LIST_MEETING_ER);
pList->ModifyStyle(0, LVS_REPORT| LVS_SHOWSELALWAYS | LVS_SINGLESEL); //
pList->SetExtendedStyle(LVS_EX_FULLROWSELECT | LVS_EX_GRIDLINES | LVS_EX_HEADERDRAGDROP);
pList->InsertColumn(0, _T("会议ID"), LVCFMT_LEFT, 50);
pList->InsertColumn(1, _T("会议名称"), LVCFMT_LEFT, 150);
pList->InsertColumn(2, _T("会议时间"), LVCFMT_LEFT, 130);
pList->InsertColumn(3, _T("会议议程"), LVCFMT_LEFT, 200);
2. 获得选中项(单项)
CListCtrl *listCtrl = (CListCtrl*)GetDlgItem(IDC_LIST_PARTICIPANT);
// 这里一定要判断, 否则在没有列表项时, 下面会报错
if(listCtrl->GetItemCount() <= 0)
{
return ;
}
// 如果列表项为0时, 该函数会报错
int nSel = *listCtrl->GetNextItem(-1, LVNI_SELECTED);
if(nSel < 0)
{
return;
}
3. 获取选中项(多项)
CListCtrl *pList = (CListCtrl*)GetDlgItem(IDC_LIST_PARTICIPANT);
POSITION pos = pList->GetFirstSelectedItemPosition();
while(pos)
{
nSel = pList->GetNextSelectedItem(pos);
}
4. 添加复选框, 并且把复选框放到最后一列
CListCtrl* pCListCtrl = (CListCtrl*)GetDlgItem(IDC_LIST1);
pCListCtrl->ModifyStyle(0, LVS_REPORT| LVS_SHOWSELALWAYS | LVS_SINGLESEL); //
// LVS_EX_HEADERDRAGDROP | LVS_EX_CHECKBOXES属性必须要
pCListCtrl->SetExtendedStyle(LVS_EX_FULLROWSELECT | LVS_EX_GRIDLINES | LVS_EX_HEADERDRAGDROP | LVS_EX_CHECKBOXES);
pCListCtrl->InsertColumn(0, _HYL("选择"), LVCFMT_LEFT, 60);
pCListCtrl->InsertColumn(1, _HYL("A"), LVCFMT_LEFT, 60);
pCListCtrl->InsertColumn(2, _HYL("B"), LVCFMT_LEFT, 150);
pCListCtrl->InsertColumn(3, _HYL("B"), LVCFMT_LEFT, 150);
pCListCtrl->InsertColumn(4, _HYL("B"), LVCFMT_LEFT, 150);
pCListCtrl->InsertColumn(5, _HYL("B"), LVCFMT_LEFT, 150);
// 把复选框放到最后一列
CHeaderCtrl *pCHeaderCtrl = pCListCtrl->GetHeaderCtrl();
int nCount = pCHeaderCtrl->GetItemCount();
int* pA = new int[nCount];
//pCHeaderCtrl->GetOrderArray(pA, nCount);
int i;
for(i = 0; i < nCount; ++i)
{
pA[i] = i + 1;
}
pA[nCount - 1] = 0;
pCHeaderCtrl->SetOrderArray(nCount, pA);
delete [] pA;
pA = 0;
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// How to get notification when an item is checked / unchecked:
void DemoDlg::OnItemchangedLinksList(NMHDR* pNMHDR, LRESULT* pResult)
{
NM_LISTVIEW* pNMListView = (NM_LISTVIEW*)pNMHDR;
*pResult = 0;
if (pNMListView->uOldState == 0 && pNMListView->uNewState == 0)
return; // No change
BOOL bPrevState = (BOOL)(((pNMListView->uOldState &
LVIS_STATEIMAGEMASK)>>12)-1); // Old check box state
if (bPrevState < 0) // On startup there's no previous state
bPrevState = 0; // so assign as false (unchecked)
// New check box state
BOOL bChecked=(BOOL)(((pNMListView->uNewState & LVIS_STATEIMAGEMASK)>>12)-1);
if (bChecked < 0) // On non-checkbox notifications assume false
bChecked = 0;
if (bPrevState == bChecked)// No change in check box
return;
// Now bChecked holds the new check box state
// ....
}
// for this to work, you must map the following message:
ON_NOTIFY(LVN_ITEMCHANGED, IDC_MYLIST, OnItemchangedLinksList)
// Setting the check box state of an item:
// Try the following piece of code
//设置CheckBox的状态代码
void SetLVCheck (WPARAM ItemIndex, BOOL bCheck)
{
ListView_SetItemState (m_lvTestList.m_hWnd, ItemIndex,
UINT((int(bCheck) + 1) << 12), LVIS_STATEIMAGEMASK);
}
5. 使列表被选中
// 单选 SendMessage(hSelectBox, LB_SETCURSEL, i, 0); // 多选 SendMessage(hSelectBox, LB_SETSEL, 1, i); // 选择nSel, 并且可见 m_UserList.SetItemState(nSel, LVIS_SELECTED | LVIS_FOCUSED, LVIS_SELECTED | LVIS_FOCUSED); m_UserList.EnsureVisible(nSel, FALSE); // int m_Selected = 80; m_listctrl.EnsureVisible(m_Selected, FALSE); //滚动条自动滚动到第80行 m_listctrl.SetExtendedStyle(LVS_EX_FULLROWSELECT); //设置高亮显示属性 m_listctrl.SetFocus(); //set list focus m_listctrl.SetItemState(m_Selected, LVIS_SELECTED, LVIS_SELECTED); //选中行
6. 复选框变换响应
// 添加消息映射
ON_NOTIFY(LVN_ITEMCHANGED, IDC_MYLIST, OnItemchangedLinksList)
// 消息处理函数
void CDlg::OnItemchangedLinksList(NMHDR* pNMHDR, LRESULT* pResult)
{
NM_LISTVIEW* pNMListView = (NM_LISTVIEW*)pNMHDR;
*pResult = 0;
if (pNMListView->uOldState == 0 && pNMListView->uNewState == 0)
return; // No change
// Old check box state
BOOL bPrevState = (BOOL)(((pNMListView->uOldState &
LVIS_STATEIMAGEMASK)>>12)-1);
if (bPrevState < 0) // On startup there's no previous state
bPrevState = 0; // so assign as false (unchecked)
// New check box state
BOOL bChecked =
(BOOL)(((pNMListView->uNewState &LVIS_STATEIMAGEMASK)>>12)-1);
if (bChecked < 0) // On non-checkbox notifications assume false
bChecked = 0;
if (bPrevState == bChecked) // No change in check box
return; // Now bChecked holds the new check box state
// ....
}
// MFC CListCtrl中的 CheckBox的选中与单击响应若只是单纯实现状态改变消息响应，可采取一下方法：
// 即实现CListCtrl的LVN_ITEMCHANGED消息响应：
void CDlg::OnItemchangedStateList(NMHDR* pNMHDR, LRESULT* pResult)
{
LPNMLISTVIEW pNMLV = reinterpret_cast<LPNMLISTVIEW>(pNMHDR);
if((pNMLV->uOldState & INDEXTOSTATEIMAGEMASK(1)) /* old state : unchecked */
&& (pNMLV->uNewState & INDEXTOSTATEIMAGEMASK(2)) /* new state : checked */
)
{
TRACE("Item %d is checked\n", pNMLV->iItem);
}
else if((pNMLV->uOldState & INDEXTOSTATEIMAGEMASK(2)) /* old state : checked */
&& (pNMLV->uNewState & INDEXTOSTATEIMAGEMASK(1)) /* new state : unchecked */
)
{
TRACE("Item %d is unchecked\n", pNMLV->iItem);
}
else
{
TRACE("Item %d does't change the check-status\n", pNMLV->iItem);
}
*pResult = 0;
}
// 若想要判断是否为鼠标单击至CheckBox引起响应，则需要实现NM_CLICK消息即可：
void CDlg::OnClickStateList(NMHDR* pNMHDR, LRESULT* pResult)
{
DWORD dwPos = GetMessagePos();
CPoint point( LOWORD(dwPos), HIWORD(dwPos) );
m_StatusList.ScreenToClient(&point);
LVHITTESTINFO lvinfo;
lvinfo.pt = point;
lvinfo.flags = LVHT_ABOVE;
UINT nFlag;
int nItem = m_StatusList.HitTest(point, &nFlag);
//判断是否点在checkbox上
if(nFlag == LVHT_ONITEMSTATEICON)
{
TRACE("You click CheckBox,Item will be Clicked!");
}
*pResult = 0;
}
// http://blog.163.com/chenluyu0910@126/blog/static/99042293201373115353711
7. 选择列表项时, 避免响应多次
void CDlgXXXX::OnLvnItemchangedListXXX(NMHDR *pNMHDR, LRESULT *pResult)
{
LPNMLISTVIEW pNMLV = reinterpret_cast<LPNMLISTVIEW>(pNMHDR);
// TODO: Add your control notification handler code here
*pResult = 0;
// 增加这一句, 避免响应多次
if(LVIF_STATE == pNMLV->uChanged && (pNMLV->uNewState & LVIS_SELECTED))
{
// your code ...
}
}