internal void FocusItem(ListBoxItem item)
{
if (item != null) {
focusedItem = item;
if (!item.IsFocused)
item.Focus ();
}
}
internal virtual void NotifyListItemLoaded (ListBoxItem listBoxItem)
{
if (ItemContainerGenerator.ItemFromContainer (listBoxItem) == SelectedItem) {
listBoxItem.IsSelected = true;
listBoxItem.Focus ();
}
}
private void MakeSingleSelection(ListBoxItem listItem)
{
if (ItemsControlFromItemContainer(listItem) == this)
{
ItemInfo info = ItemInfoFromContainer(listItem);
SelectionChange.SelectJustThisItem(info, true /* assumeInItemsCollection */);
listItem.Focus();
UpdateAnchorAndActionItem(info);
}
}
public void Focusable ()
{
bool loaded = false;
ListBoxItem item = new ListBoxItem { Content = "Hello World" };
item.Loaded += delegate { loaded = true; };
ListBox box = new ListBox ();
box.Items.Add (item);
TestPanel.Children.Add (box);
EnqueueConditional (() => loaded);
Enqueue (() => {
Assert.IsTrue (item.Focus (), "#1");
box.SelectedItem = item;
box.SelectedItem = null;
Assert.IsTrue (item.Focus (), "#2");
});
EnqueueTestComplete ();
}
protected override void OnKeyDown(KeyEventArgs e)
{
if (!e.Handled)
{
bool handled = false;
int newFocusedIndex = -1;
switch (e.Key)
{
case Key.Space:
case Key.Enter:
if ((Key.Enter != e.Key) || KeyboardNavigation.GetAcceptsReturn(this))
{
if (ModifierKeys.Alt != (Keyboard.Modifiers & (ModifierKeys.Control | ModifierKeys.Alt)))
{
// KeyEventArgs.OriginalSource (used by WPF) isn't available in Silverlight; use FocusManager.GetFocusedElement instead
ListBoxItem listBoxItem = FocusManager.GetFocusedElement() as ListBoxItem;
if (null != listBoxItem)
{
if ((ModifierKeys.Control == (Keyboard.Modifiers & ModifierKeys.Control)) && listBoxItem.IsSelected)
{
SelectedItem = null;
}
else
{
SelectedItem = ItemContainerGenerator.ItemFromContainer(listBoxItem);
}
handled = true;
}
}
}
break;
case Key.Home:
newFocusedIndex = 0;
break;
case Key.End:
newFocusedIndex = Items.Count - 1;
break;
case Key.PageUp:
newFocusedIndex = NavigateByPage(false);
break;
case Key.PageDown:
newFocusedIndex = NavigateByPage(true);
break;
case Key.Left:
if (IsVerticalOrientation())
{
ElementScrollViewerScrollInDirection(Key.Left);
}
else
{
newFocusedIndex = _focusedIndex - 1;
}
break;
case Key.Up:
if (IsVerticalOrientation())
{
newFocusedIndex = _focusedIndex - 1;
}
else
{
ElementScrollViewerScrollInDirection(Key.Up);
}
break;
case Key.Right:
if (IsVerticalOrientation())
{
ElementScrollViewerScrollInDirection(Key.Right);
}
else
{
newFocusedIndex = _focusedIndex + 1;
}
break;
case Key.Down:
if (IsVerticalOrientation())
{
newFocusedIndex = _focusedIndex + 1;
}
else
{
ElementScrollViewerScrollInDirection(Key.Down);
}
break;
// case Key.Divide: // Feature only used by SelectionMode.Extended
// case Key.Oem2: // Key not supported by Silverlight
// break;
// case Key.Oem5: // Key not supported by Silverlight
// break;
default:
Debug.Assert(!handled);
break;
}
if ((-1 != newFocusedIndex) &&
(-1 != _focusedIndex) &&
(newFocusedIndex != _focusedIndex) &&
(0 <= newFocusedIndex) &&
(newFocusedIndex < Items.Count))
{
// A key press will change the focused ListBoxItem
ListBoxItem listBoxItem = (ListBoxItem)ItemContainerGenerator.ContainerFromIndex(newFocusedIndex);
Debug.Assert(null != listBoxItem);
ScrollIntoView(ItemContainerGenerator.ItemFromContainer(listBoxItem));
if ((Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control)
{
listBoxItem.Focus();
}
else
{
SelectedItem = ItemContainerGenerator.ItemFromContainer(listBoxItem);
}
handled = true;
}
if (handled)
{
e.Handled = true;
}
}
}
private void MakeSingleSelection(ListBoxItem listItem)
{
if (ItemsControlFromItemContainer(listItem) == this)
{
object item = ItemContainerGenerator.ItemFromContainer(listItem);
SelectionChange.SelectJustThisItem(item, true /* assumeInItemsCollection */);
listItem.Focus();
UpdateAnchorAndActionItem(listItem);
}
}