private static void UpdateItemFn(object state)
{
LviUpdInfo lui = (state as LviUpdInfo);
if (lui == null)
{
Debug.Assert(false); return;
}
try // Avoid cross-thread exceptions
{
bool bWork;
lock (lui.ValidIDsSyncObject)
{
if (!lui.ValidIDs.TryGetValue(lui.UpdateID,
out bWork))
{
Debug.Assert(false); return;
}
}
if (bWork)
{
string strNew = lui.Function(lui.Text, lui.ListItem);
if (strNew == null)
{
Debug.Assert(false); return;
}
if (strNew == lui.Text)
{
return;
}
// if(lui.ListView.InvokeRequired)
lui.ListView.Invoke(new SetItemTextDelegate(
SetItemText), new object[] { strNew, lui });
// else SetItemText(strNew, lui);
}
}
catch (Exception) { Debug.Assert(false); }
finally
{
try // Avoid cross-thread exceptions
{
lock (lui.ValidIDsSyncObject)
{
if (!lui.ValidIDs.Remove(lui.UpdateID))
{
Debug.Assert(false);
}
}
}
catch (Exception) { Debug.Assert(false); }
}
}
public void Queue(string strText, PwListItem li, int iIndexHint,
int iSubItem, PwTextUpdateDelegate f)
{
if (strText == null)
{
Debug.Assert(false); return;
}
if (li == null)
{
Debug.Assert(false); return;
}
if (iSubItem < 0)
{
Debug.Assert(false); return;
}
if (f == null)
{
Debug.Assert(false); return;
}
LviUpdInfo state = new LviUpdInfo();
state.ListView = m_lv;
state.UpdateID = unchecked ((li.ListViewItemID << 6) + iSubItem);
state.Text = strText;
state.ListItem = li;
state.IndexHint = ((iIndexHint >= 0) ? iIndexHint : 0);
state.SubItem = iSubItem;
state.Function = f;
state.ListEditSyncObject = m_objListEditSync;
state.ValidIDsSyncObject = m_objValidIDsSync;
state.ValidIDs = m_dValidIDs;
lock (m_objValidIDsSync)
{
Debug.Assert(!m_dValidIDs.ContainsKey(state.UpdateID));
m_dValidIDs[state.UpdateID] = true;
}
try
{
if (!ThreadPool.QueueUserWorkItem(new WaitCallback(UpdateItemFn),
state))
{
throw new InvalidOperationException();
}
}
catch (Exception)
{
Debug.Assert(false);
lock (m_objValidIDsSync) { m_dValidIDs.Remove(state.UpdateID); }
}
}
private static void SetItemText(string strText, LviUpdInfo lui)
{
try // Avoid cross-thread exceptions
{
long lTargetID = lui.ListItem.ListViewItemID;
int iIndexHint = lui.IndexHint;
lock (lui.ListEditSyncObject)
{
ListView.ListViewItemCollection lvic = lui.ListView.Items;
int nCount = lvic.Count;
// for(int i = 0; i < nCount; ++i)
for (int i = nCount; i > 0; --i)
{
int j = ((iIndexHint + i) % nCount);
ListViewItem lvi = lvic[j];
PwListItem li = (lvi.Tag as PwListItem);
if (li == null)
{
Debug.Assert(false); continue;
}
if (li.ListViewItemID != lTargetID)
{
continue;
}
lvi.SubItems[lui.SubItem].Text = strText;
break;
}
}
}
catch (Exception) { Debug.Assert(false); }
}
private static void SetItemText(string strText, LviUpdInfo lui)
{
try // Avoid cross-thread exceptions
{
long lTargetID = lui.ListItem.ListViewItemID;
int iIndexHint = lui.IndexHint;
lock(lui.ListEditSyncObject)
{
ListView.ListViewItemCollection lvic = lui.ListView.Items;
int nCount = lvic.Count;
// for(int i = 0; i < nCount; ++i)
for(int i = nCount; i > 0; --i)
{
int j = ((iIndexHint + i) % nCount);
ListViewItem lvi = lvic[j];
PwListItem li = (lvi.Tag as PwListItem);
if(li == null) { Debug.Assert(false); continue; }
if(li.ListViewItemID != lTargetID) continue;
lvi.SubItems[lui.SubItem].Text = strText;
break;
}
}
}
catch(Exception) { Debug.Assert(false); }
}
public void Queue(string strText, PwListItem li, int iIndexHint,
int iSubItem, PwTextUpdateDelegate f)
{
if(strText == null) { Debug.Assert(false); return; }
if(li == null) { Debug.Assert(false); return; }
if(iSubItem < 0) { Debug.Assert(false); return; }
if(f == null) { Debug.Assert(false); return; }
LviUpdInfo state = new LviUpdInfo();
state.ListView = m_lv;
state.UpdateID = unchecked((li.ListViewItemID << 6) + iSubItem);
state.Text = strText;
state.ListItem = li;
state.IndexHint = ((iIndexHint >= 0) ? iIndexHint : 0);
state.SubItem = iSubItem;
state.Function = f;
state.ListEditSyncObject = m_objListEditSync;
state.ValidIDsSyncObject = m_objValidIDsSync;
state.ValidIDs = m_dValidIDs;
lock(m_objValidIDsSync)
{
Debug.Assert(!m_dValidIDs.ContainsKey(state.UpdateID));
m_dValidIDs[state.UpdateID] = true;
}
try
{
if(!ThreadPool.QueueUserWorkItem(new WaitCallback(UpdateItemFn),
state)) throw new InvalidOperationException();
}
catch(Exception)
{
Debug.Assert(false);
lock(m_objValidIDsSync) { m_dValidIDs.Remove(state.UpdateID); }
}
}
