/// <summary>
/// Called when an Item's IsSelected property has changed
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void OnLongListMultiSelectorItemIsSelectedChanged(object sender, EventArgs e)
{
LongListMultiSelectorItem item = sender as LongListMultiSelectorItem;
if (item != null)
{
object content = item.Content;
if (content != null)
{
if (item.IsSelected)
{
// Check if the item is already in the SelectedItems
// collection, otherwise a double-add will happen.
if (!SelectedItems.Contains(content))
{
SelectedItems.Add(content);
}
}
else
{
SelectedItems.Remove(content);
}
}
}
}
/// <summary>
/// Called when an item is realized :
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void OnInnerSelectorItemRealized(object sender, ItemRealizationEventArgs e)
{
if (e.ItemKind == LongListSelectorItemKind.Item)
{
int childrenCount = VisualTreeHelper.GetChildrenCount(e.Container);
if (childrenCount > 0)
{
LongListMultiSelectorItem llItem = VisualTreeHelper.GetChild(e.Container, 0) as LongListMultiSelectorItem;
if (llItem != null)
{
ConfigureItem(llItem);
// Check if item should be selected
llItem.IsSelected = _selectedItems.Contains(llItem.Content);
llItem.IsSelectedChanged += OnLongListMultiSelectorItemIsSelectedChanged;
llItem.GotoState(IsSelectionEnabled ? LongListMultiSelectorItem.State.Opened : LongListMultiSelectorItem.State.Closed);
_realizedItems.Add(llItem.WR);
}
}
}
if (ItemRealized != null)
{
ItemRealized(sender, e);
}
}
/// <summary>
/// Configure an item's template according to the current state
/// </summary>
/// <param name="item"></param>
internal void ConfigureItem(LongListMultiSelectorItem item)
{
if (item != null)
{
item.ContentTemplate = ItemTemplate;
if (ItemContainerStyle != null)
{
if (item.Style != ItemContainerStyle)
{
item.Style = ItemContainerStyle;
}
}
else if (LayoutMode == LongListSelectorLayoutMode.Grid)
{
if (item.Style != DefaultGridItemContainerStyle)
{
item.Style = DefaultGridItemContainerStyle;
}
}
else
{
if (item.Style != DefaultListItemContainerStyle)
{
item.Style = DefaultListItemContainerStyle;
}
}
if ((ItemInfoTemplate != null) && (item.ContentInfoTemplate != ItemInfoTemplate))
{
item.SetBinding(LongListMultiSelectorItem.ContentInfoProperty, new Binding());
item.ContentInfoTemplate = ItemInfoTemplate;
}
}
}
/// <summary>
/// Handles the change of the HintPanelHeight property
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private static void OnHintPanelHeightPropertyChanged(object sender, DependencyPropertyChangedEventArgs e)
{
LongListMultiSelectorItem This = sender as LongListMultiSelectorItem;
if (This != null)
{
This.OnHintPanelHeightChanged();
}
}
/// <summary>
/// Called then the property is changed
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
static void OnIsSelectedPropertyChanged(object sender, DependencyPropertyChangedEventArgs e)
{
LongListMultiSelectorItem This = sender as LongListMultiSelectorItem;
if (This != null)
{
This.OnIsSelectedChanged();
}
}
/// <summary>
/// Called when an Item's IsSelected property has changed
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void OnLongListMultiSelectorItemIsSelectedChanged(object sender, EventArgs e)
{
LongListMultiSelectorItem item = sender as LongListMultiSelectorItem;
if (item != null)
{
object content = item.Content;
if (content != null)
{
if (item.IsSelected)
{
SelectedItems.Add(content);
}
else
{
SelectedItems.Remove(content);
}
}
}
}
/// <summary>
/// Disconnects an item when it is unrealized
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void OnInnerSelectorItemUnrealized(object sender, ItemRealizationEventArgs e)
{
if (e.ItemKind == LongListSelectorItemKind.Item)
{
int childrenCount = VisualTreeHelper.GetChildrenCount(e.Container);
if (childrenCount > 0)
{
LongListMultiSelectorItem llItem = VisualTreeHelper.GetChild(e.Container, 0) as LongListMultiSelectorItem;
if (llItem != null)
{
llItem.IsSelectedChanged -= OnLongListMultiSelectorItemIsSelectedChanged;
_realizedItems.Remove(llItem.WR);
}
}
}
if (ItemUnrealized != null)
{
ItemUnrealized(sender, e);
}
}
