private void HandleCollectionChanged (object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
if (e.Action == NotifyCollectionChangedAction.Add) {
var index = e.NewStartingIndex;
foreach (var uielement in e.NewItems.Cast<UIElement>()) {
var child = new CanvasChild (uielement);
AddVisualChild (child);
children.Insert (index, child);
RaiseAddedItem (uielement);
index++;
}
}
if (e.Action == NotifyCollectionChangedAction.Remove) {
var index = e.OldStartingIndex;
foreach (var uielement in e.OldItems.Cast<UIElement>()) {
var child = children [index];
RemoveVisualChild (child);
children.Remove (child);
RaiseRemovedItem (uielement);
index++;
}
}
if (e.Action == NotifyCollectionChangedAction.Replace) {
var index = e.NewStartingIndex;
foreach (var uielement in e.NewItems.Cast<UIElement>()) {
var child = new CanvasChild (uielement);
RemoveVisualChild (children [index]);
RaiseRemovedItem (children [index].Content);
AddVisualChild (child);
children [index] = child;
RaiseAddedItem (uielement);
index++;
}
}
if (e.Action == NotifyCollectionChangedAction.Reset) {
foreach (var child in children) {
RaiseRemovedItem (child.Content);
}
children.Clear ();
}
}
private void HandleCollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
if (e.Action == NotifyCollectionChangedAction.Add)
{
var index = e.NewStartingIndex;
foreach (var uielement in e.NewItems.Cast <UIElement>())
{
var child = new CanvasChild(uielement);
AddVisualChild(child);
children.Insert(index, child);
RaiseAddedItem(uielement);
index++;
}
}
if (e.Action == NotifyCollectionChangedAction.Remove)
{
var index = e.OldStartingIndex;
foreach (var uielement in e.OldItems.Cast <UIElement>())
{
var child = children [index];
RemoveVisualChild(child);
children.Remove(child);
RaiseRemovedItem(uielement);
index++;
}
}
if (e.Action == NotifyCollectionChangedAction.Replace)
{
var index = e.NewStartingIndex;
foreach (var uielement in e.NewItems.Cast <UIElement>())
{
var child = new CanvasChild(uielement);
RemoveVisualChild(children [index]);
RaiseRemovedItem(children [index].Content);
AddVisualChild(child);
children [index] = child;
RaiseAddedItem(uielement);
index++;
}
}
if (e.Action == NotifyCollectionChangedAction.Reset)
{
foreach (var child in children)
{
RaiseRemovedItem(child.Content);
}
children.Clear();
}
}