private void UpdateItems()
{
++_updating;
try
{
if (GetItems != null)
{
// Use the adapter if the check state event is not defined.
GetObjectCheckStateDelegate getItemCheckState = GetItemCheckState;
if (getItemCheckState == null)
{
getItemCheckState = new GetObjectCheckStateDelegate(AdaptGetItemCheckState);
}
SetObjectCheckStateDelegate setItemCheckState = SetItemCheckState;
if (setItemCheckState == null)
{
setItemCheckState = new SetObjectCheckStateDelegate(AdaptSetItemCheckState);
}
// Recycle the collection of items.
ArrayList newItems = new ArrayList(base.Items.Count);
using (var recycleBin = new RecycleBin <CheckedListBoxItem>())
{
foreach (CheckedListBoxItem item in base.Items)
{
recycleBin.AddObject(item);
}
// Extract each item from the recycle bin.
foreach (object item in GetItems())
{
newItems.Add(recycleBin.Extract(
new CheckedListBoxItem(item, GetItemText, getItemCheckState, setItemCheckState)));
}
}
// Replace the items in the control.
base.BeginUpdate();
try
{
// Make sure the same tag is selected.
CheckedListBoxItem selectedItem = (CheckedListBoxItem)base.SelectedItem;
object selectedTag = selectedItem == null ? null : selectedItem.Tag;
base.Items.Clear();
base.Items.AddRange(newItems.ToArray());
base.SelectedIndex = IndexOfTag(selectedTag);
}
finally
{
base.EndUpdate();
}
}
}
finally
{
--_updating;
}
}
public CheckedListBoxItem(object tag, GetObjectStringDelegate getItemText, GetObjectCheckStateDelegate getItemCheckState, SetObjectCheckStateDelegate setItemCheckState)
{
_tag = tag;
_getItemText = getItemText;
_getItemCheckState = getItemCheckState;
_setItemCheckState = setItemCheckState;
_depText = Dependent.New("CheckedListBoxItem.Text", UpdateText);
_depCheckState = Dependent.New("CheckedListBoxItem.CheckState", UpdateCheckState);
}
public CheckedListBoxItem( object tag, GetObjectStringDelegate getItemText, GetObjectCheckStateDelegate getItemCheckState, SetObjectCheckStateDelegate setItemCheckState )
{
_tag = tag;
_getItemText = getItemText;
_getItemCheckState = getItemCheckState;
_setItemCheckState = setItemCheckState;
_depText = Dependent.New("CheckedListBoxItem.Text", UpdateText );
_depCheckState = Dependent.New("CheckedListBoxItem.CheckState", UpdateCheckState);
}
private void UpdateItems()
{
++_updating;
try
{
if ( GetItems != null )
{
// Use the adapter if the check state event is not defined.
GetObjectCheckStateDelegate getItemCheckState = GetItemCheckState;
if ( getItemCheckState == null )
getItemCheckState = new GetObjectCheckStateDelegate( AdaptGetItemCheckState );
SetObjectCheckStateDelegate setItemCheckState = SetItemCheckState;
if ( setItemCheckState == null )
setItemCheckState = new SetObjectCheckStateDelegate( AdaptSetItemCheckState );
// Recycle the collection of items.
ArrayList newItems = new ArrayList( base.Items.Count );
using (var recycleBin = new RecycleBin<CheckedListBoxItem>())
{
foreach (CheckedListBoxItem item in base.Items)
recycleBin.AddObject(item);
// Extract each item from the recycle bin.
foreach ( object item in GetItems() )
{
newItems.Add( recycleBin.Extract(
new CheckedListBoxItem( item, GetItemText, getItemCheckState, setItemCheckState ) ) );
}
}
// Replace the items in the control.
base.BeginUpdate();
try
{
// Make sure the same tag is selected.
CheckedListBoxItem selectedItem = (CheckedListBoxItem)base.SelectedItem;
object selectedTag = selectedItem == null ? null : selectedItem.Tag;
base.Items.Clear();
base.Items.AddRange( newItems.ToArray() );
base.SelectedIndex = IndexOfTag( selectedTag );
}
finally
{
base.EndUpdate();
}
}
}
finally
{
--_updating;
}
}