internal static void Cleanup(this VisualElement self)
{
if (self == null)
{
throw new ArgumentNullException("self");
}
IVisualElementRenderer renderer = Platform.GetRenderer(self);
foreach (Element element in self.Descendants())
{
var visual = element as VisualElement;
if (visual == null)
{
continue;
}
IVisualElementRenderer childRenderer = Platform.GetRenderer(visual);
if (childRenderer != null)
{
((Gtk.Widget)childRenderer).Destroy();
Platform.SetRenderer(visual, null);
}
}
if (renderer != null)
{
((Gtk.Widget)renderer).Destroy();
Platform.SetRenderer(self, null);
}
}
public static void Cleanup(this VisualElement self)
{
if (self == null)
{
throw new ArgumentNullException("self");
}
IVisualElementRenderer renderer = Platform.GTK.Platform.GetRenderer(self);
foreach (Element element in self.Descendants())
{
var visual = element as VisualElement;
if (visual == null)
{
continue;
}
IVisualElementRenderer childRenderer = Platform.GTK.Platform.GetRenderer(visual);
if (childRenderer != null)
{
childRenderer.Dispose();
Platform.GTK.Platform.SetRenderer(visual, null);
}
}
if (renderer != null)
{
renderer.Dispose();
Platform.GTK.Platform.SetRenderer(self, null);
}
}
internal static void Cleanup(this VisualElement self)
{
if (self == null)
{
throw new ArgumentNullException(nameof(self));
}
IVisualElementRenderer renderer = Platform.GetRenderer(self);
foreach (Element element in self.Descendants())
{
if (!(element is VisualElement visual))
{
continue;
}
IVisualElementRenderer childRenderer = Platform.GetRenderer(visual);
if (childRenderer != null)
{
childRenderer.Dispose();
Platform.SetRenderer(visual, null);
}
}
if (renderer != null)
{
renderer.Dispose();
Platform.SetRenderer(self, null);
}
}
public static void DisposeModelAndChildrenRenderers(this VisualElement view)
{
IVisualElementRenderer renderer;
foreach (var child in view.Descendants().OfType <VisualElement>())
{
renderer = XFPlatform.GetRenderer(child);
XFPlatform.SetRenderer(child, null);
if (renderer == null)
{
continue;
}
renderer.NativeView.RemoveFromSuperview();
renderer.Dispose();
}
renderer = XFPlatform.GetRenderer(view);
if (renderer != null)
{
renderer.NativeView.RemoveFromSuperview();
renderer.Dispose();
}
XFPlatform.SetRenderer(view, null);
}
public List <NSObject> GetAccessibilityElements()
{
if (Container == null || Element == null)
{
return(null);
}
var children = Element.Descendants();
SortedDictionary <int, List <VisualElement> > tabIndexes = null;
List <NSObject> views = new List <NSObject>();
foreach (var child in children)
{
if (!(child is VisualElement ve))
{
continue;
}
tabIndexes = ve.GetSortedTabIndexesOnParentPage(out _);
break;
}
if (tabIndexes == null)
{
return(null);
}
foreach (var idx in tabIndexes?.Keys)
{
var tabGroup = tabIndexes[idx];
foreach (var child in tabGroup)
{
if (child is Layout ||
!(
child is VisualElement ve && ve.IsTabStop &&
AutomationProperties.GetIsInAccessibleTree(ve) != false && // accessible == true
ve.GetRenderer().NativeView is ITabStop tabStop)
)
{
continue;
}
var thisControl = tabStop.TabStop;
if (thisControl == null)
{
continue;
}
if (views.Contains(thisControl))
{
break; // we've looped to the beginning
}
views.Add(thisControl);
}
}
return(views);
}
// TODO MAUI Make this work against IVIEW
internal static void Cleanup(this VisualElement self)
{
if (self == null)
{
throw new ArgumentNullException("self");
}
IViewHandler handler = self.Handler;
foreach (Element element in self.Descendants())
{
var visual = element as VisualElement;
if (visual == null)
{
continue;
}
visual.Handler = null;
}
self.Handler = null;
}