internal void CloseThisTabItem([NotNull] MetroTabItem tabItem)
{
if (tabItem == null)
{
throw new ArgumentNullException(nameof(tabItem));
}
if (this.CloseTabCommand != null)
{
var closeTabCommandParameter = tabItem.CloseTabCommandParameter ?? tabItem;
if (this.CloseTabCommand.CanExecute(closeTabCommandParameter))
{
this.CloseTabCommand.Execute(closeTabCommandParameter);
}
}
else
{
// KIDS: don't try this at home
// this is not good MVVM habits and I'm only doing it
// because I want the demos to be absolutely bitching
// the control is allowed to cancel this event
if (this.RaiseTabItemClosingEvent(tabItem))
{
return;
}
if (this.ItemsSource == null)
{
// if the list is hard-coded (i.e. has no ItemsSource)
// then we remove the item from the collection
this.Items.Remove(tabItem);
}
else
{
// if ItemsSource is something we cannot work with, bail out
var collection = this.ItemsSource as IList;
if (collection == null)
{
return;
}
// find the item and kill it (I mean, remove it)
var item2Remove = collection.OfType <object>().FirstOrDefault(item => tabItem == item || tabItem.DataContext == item);
if (item2Remove != null)
{
collection.Remove(item2Remove);
}
}
}
}
internal bool RaiseTabItemClosingEvent(MetroTabItem closingItem)
{
var tabItemClosingEvent = this.TabItemClosingEvent;
if (tabItemClosingEvent != null)
{
foreach (TabItemClosingEventHandler subHandler in tabItemClosingEvent.GetInvocationList().OfType <TabItemClosingEventHandler>())
{
var args = new TabItemClosingEventArgs(closingItem);
subHandler.Invoke(this, args);
if (args.Cancel)
{
return(true);
}
}
}
return(false);
}
internal TabItemClosingEventArgs(MetroTabItem item)
{
ClosingTabItem = item;
}