public void End( bool itemsSourceChanged, bool allowCancelingOfSelection, bool allowSynchronizeSelectionWithCurrent )
{
Debug.Assert( m_isActive );
List<SelectionInfo> activatedSelectionDeltas = new List<SelectionInfo>();
SelectionInfo selectionInfo;
try
{
foreach( SelectionChanger selectionChanger in m_activatedSelectionChanger.Values )
{
selectionInfo = selectionChanger.GetSelectionInfo();
if( !selectionInfo.IsEmpty )
{
activatedSelectionDeltas.Add( selectionInfo );
}
}
if( activatedSelectionDeltas.Count > 0 )
{
DataGridSelectionChangingEventArgs eventArgs = new DataGridSelectionChangingEventArgs(
new ReadOnlyCollection<SelectionInfo>( activatedSelectionDeltas ), allowCancelingOfSelection );
m_owner.RaiseSelectionChanging( eventArgs );
if( ( eventArgs.Cancel ) && ( allowCancelingOfSelection ) )
{
this.Cancel();
throw new DataGridException( "Selection modification canceled." );
}
}
foreach( SelectionChanger selectionChanger in m_activatedSelectionChanger.Values )
{
this.CommitSelectionChanger( selectionChanger, itemsSourceChanged );
}
if( ( allowSynchronizeSelectionWithCurrent ) && ( m_owner.SynchronizeSelectionWithCurrent ) )
{
this.UpdateCurrentToSelection();
}
}
finally
{
m_isActive = false;
m_activatedSelectionChanger.Clear();
}
// Notify that GlobalSelectedItems has changed if at least one selection has changed.
if( activatedSelectionDeltas.Count > 0 )
{
for( int i = activatedSelectionDeltas.Count - 1; i >= 0; i-- )
{
selectionInfo = activatedSelectionDeltas[ i ];
// Invoke the selection changed on the DataGridContext.
selectionInfo.DataGridContext.InvokeSelectionChanged( selectionInfo );
}
m_owner.RaiseSelectionChanged(
new DataGridSelectionChangedEventArgs(
new ReadOnlyCollection<SelectionInfo>( activatedSelectionDeltas ) ) );
m_owner.NotifyGlobalSelectedItemsChanged();
}
}
internal void RaiseSelectionChanging( DataGridSelectionChangingEventArgs e )
{
this.OnSelectionChanging( e );
}
internal void RaiseSelectionChanging( DataGridSelectionChangingEventArgs e )
{
using( m_inhibitPreviewGotKeyboardFocus.Set() )
{
this.OnSelectionChanging( e );
}
}
protected virtual void OnSelectionChanging( DataGridSelectionChangingEventArgs e )
{
this.RaiseEvent( e );
}
/// <summary>
/// React on selection changing.
/// </summary>
/// <param name="sender">Ignored.</param>
/// <param name="e">Selection changing event args.</param>
private void _SelectionChanging(object sender, DataGridSelectionChangingEventArgs e)
{
NotifyCollectionChangedEventArgs args =
CommonHelpers.GetSelectionChangedArgsFromGrid(e.SelectionInfos);
_previousSelectedIndex = null;
if (args.Action == NotifyCollectionChangedAction.Remove)
{
// Save preremoving selection.
_previousSelectedIndex = SelectedIndex;
}
}