private void OnPlotterChildrenChanged(object sender, NotifyCollectionChangedEventArgs e)
{
bool updateVisible = false;
if (e.NewItems != null)
{
foreach (IPlotterElement item in e.NewItems)
{
if (Viewport2D.GetIsContentBoundsHost(plotter.VisualBindings[item]))
{
DebugVerify.Is(!contentBoundsHosts.Contains(item));
updateVisible = true;
contentBoundsHosts.Add(item);
}
}
}
if (e.OldItems != null)
{
foreach (IPlotterElement item in e.OldItems)
{
if (contentBoundsHosts.Contains(item))
{
updateVisible = true;
contentBoundsHosts.Remove(item);
}
}
}
if (updateVisible && IsFittedToView)
{
UpdateVisible();
}
}
private void UpdateContentBoundsHosts()
{
contentBoundsHosts.Clear();
foreach (var item in plotter.Children)
{
DependencyObject dependencyObject = item as DependencyObject;
if (dependencyObject != null)
{
bool isContentBoundsHost = Viewport2D.GetIsContentBoundsHost(dependencyObject);
if (isContentBoundsHost)
{
contentBoundsHosts.Add(item);
}
}
}
UpdateVisible();
}
private void UpdateContentBoundsHosts()
{
contentBoundsHosts.Clear();
foreach (var item in plotter.Children)
{
DependencyObject dependencyObject = item as DependencyObject;
if (dependencyObject != null)
{
bool hasNonEmptyBounds = !Viewport2D.GetContentBounds(dependencyObject).IsEmpty;
if (hasNonEmptyBounds && Viewport2D.GetIsContentBoundsHost(dependencyObject))
{
contentBoundsHosts.Add(dependencyObject);
}
}
}
UpdateVisible();
}