private void DoAction(DualListAction dualListAction, bool remove, int index)
{
DualListCancelEventArgs e = new DualListCancelEventArgs(dualListAction, ListBoxFrom.Items[index]);
if (BeforeAction != null)
{
BeforeAction(this, e);
}
if (!e.Cancel)
{
int newIndex = ListBoxTo.Items.Add(e.Item);
ListBoxTo.SelectedIndices.Add(newIndex);
if (remove)
{
listBoxFrom.Items.RemoveAt(index);
}
if (AfterAction != null)
{
DualListActionEventArgs f = new DualListActionEventArgs(dualListAction, e.Item, newIndex);
AfterAction(this, f);
}
}
}
public DualListCancelEventArgs( DualListAction action, object item )
{
Action = action;
Item = item;
Cancel = false;
}
private void DoSelected( DualListAction dualListAction )
{
ListBoxTo.SelectedIndices.Clear();
if ( ListBoxFrom.SelectionMode == SelectionMode.One )
{
if ( ListBoxFrom.SelectedIndex > -1 )
{
int i = ListBoxFrom.SelectedIndex;
if ( dualListAction == DualListAction.MoveSelected )
{
DoAction( dualListAction, true, i );
}
else // copy
{
DoAction( dualListAction, false, i );
i++;
}
if ( i >= listBoxFrom.Items.Count )
{
i = listBoxFrom.Items.Count - 1;
}
listBoxFrom.SelectedIndex = i;
}
}
else // multi
{
foreach ( int x in listBoxFrom.SelectedIndices )
{
DoAction( dualListAction, false, x );
}
int i;
if ( listBoxFrom.SelectedIndices.Count > 0 )
{
i = listBoxFrom.SelectedIndices[listBoxFrom.SelectedIndices.Count - 1] + 1;
}
else
{
return;
}
for ( int t = listBoxFrom.Items.Count - 1; t >= 0; t-- )
{
if ( dualListAction == DualListAction.MoveSelected )
{
if ( listBoxFrom.SelectedIndices.Contains( t ) )
{
i = t;
listBoxFrom.Items.RemoveAt( t );
}
}
else // copy
{
listBoxFrom.SetSelected( t, false );
}
}
if ( i > listBoxFrom.Items.Count )
{
i = listBoxFrom.Items.Count - 1;
}
if ( i > -1 && listBoxFrom.Items.Count > i )
{
listBoxFrom.SetSelected( i, true );
}
}
}
private void DoAction( DualListAction dualListAction, bool remove, int index )
{
DualListCancelEventArgs e = new DualListCancelEventArgs( dualListAction, ListBoxFrom.Items[index] );
if ( BeforeAction != null )
{
BeforeAction( this, e );
}
if ( !e.Cancel )
{
int newIndex = ListBoxTo.Items.Add( e.Item );
ListBoxTo.SelectedIndices.Add( newIndex );
if ( remove )
{
listBoxFrom.Items.RemoveAt( index );
}
if ( AfterAction != null )
{
DualListActionEventArgs f = new DualListActionEventArgs( dualListAction, e.Item, newIndex );
AfterAction( this, f );
}
}
}
private void DoSelected(DualListAction dualListAction)
{
ListBoxTo.SelectedIndices.Clear();
if (ListBoxFrom.SelectionMode == SelectionMode.One)
{
if (ListBoxFrom.SelectedIndex > -1)
{
int i = ListBoxFrom.SelectedIndex;
if (dualListAction == DualListAction.MoveSelected)
{
DoAction(dualListAction, true, i);
}
else // copy
{
DoAction(dualListAction, false, i);
i++;
}
if (i >= listBoxFrom.Items.Count)
{
i = listBoxFrom.Items.Count - 1;
}
listBoxFrom.SelectedIndex = i;
}
}
else // multi
{
foreach (int x in listBoxFrom.SelectedIndices)
{
DoAction(dualListAction, false, x);
}
int i;
if (listBoxFrom.SelectedIndices.Count > 0)
{
i = listBoxFrom.SelectedIndices[listBoxFrom.SelectedIndices.Count - 1] + 1;
}
else
{
return;
}
for (int t = listBoxFrom.Items.Count - 1; t >= 0; t--)
{
if (dualListAction == DualListAction.MoveSelected)
{
if (listBoxFrom.SelectedIndices.Contains(t))
{
i = t;
listBoxFrom.Items.RemoveAt(t);
}
}
else // copy
{
listBoxFrom.SetSelected(t, false);
}
}
if (i > listBoxFrom.Items.Count)
{
i = listBoxFrom.Items.Count - 1;
}
if (i > -1)
{
listBoxFrom.SetSelected(i, true);
}
}
}
public DualListActionEventArgs( DualListAction action, object item, int index )
{
Action = action;
Item = item;
Index = index;
}
public DualListCancelEventArgs(DualListAction action, object item)
{
Action = action;
Item = item;
Cancel = false;
}
public DualListActionEventArgs(DualListAction action, object item, int index)
{
Action = action;
Item = item;
Index = index;
}
