internal static void OnVisualChildChanged(DependencyObject parent, DependencyObject child, bool isAdded)
{
EventHandler <VisualTreeChangeEventArgs> visualTreeChanged = VisualDiagnostics.s_visualTreeChanged;
if (visualTreeChanged != null && EnableHelper.IsVisualTreeChangeEnabled)
{
int index;
VisualTreeChangeType changeType;
if (isAdded)
{
index = VisualDiagnostics.GetChildIndex(parent, child);
changeType = VisualTreeChangeType.Add;
}
else
{
// We cannot reliably get correct child index for a removed child. We'll force it to be -1;
index = -1;
changeType = VisualTreeChangeType.Remove;
}
RaiseVisualTreeChangedEvent(
visualTreeChanged,
new VisualTreeChangeEventArgs(parent, child, index, changeType),
// see EnableHelper.IsChangePermitted
isPotentialOuterChange: (changeType == VisualTreeChangeType.Add && index == 0 && VisualTreeHelper.GetParent(parent) == null));
}
}
internal static void OnVisualChildChanged(DependencyObject parent, DependencyObject child, bool isAdded)
{
EventHandler <VisualTreeChangeEventArgs> visualTreeChanged = VisualDiagnostics.s_visualTreeChanged;
if (visualTreeChanged != null && VisualDiagnostics.IsVisualTreeChangeEnabled)
{
int index;
VisualTreeChangeType changeType;
if (isAdded)
{
index = VisualDiagnostics.GetChildIndex(parent, child);
changeType = VisualTreeChangeType.Add;
}
else
{
// We cannot reliably get correct child index for a removed child. We'll force it to be -1;
index = -1;
changeType = VisualTreeChangeType.Remove;
}
VisualTreeChangeEventArgs args = new VisualTreeChangeEventArgs(parent, child, index, changeType);
visualTreeChanged(null, args);
}
}