public void Remove(UIElement parent, T ui)
{
//--------
//need to remove presentation
if (parent.CurrentPrimaryRenderElement is IContainerRenderElement parentRenderE)
{
parentRenderE.RemoveChild(ui.GetPrimaryRenderElement());
}
//--------
//need to remove presentation
//we must ensure linked node is valid
parent._needContentLayout = true;
if (ui._collectionLinkNode is LinkedListNode <UIElement> linkedNode)
{
_linkedList.Remove((LinkedListNode <T>)(object) linkedNode);
}
else
{
throw new NotSupportedException();
}
parent?.InvalidateLayout();
}
public void AddBefore(UIElement parent, T beforeUI, T ui)
{
CollectionHelper.CheckUI(parent, ui);
if (beforeUI._collectionLinkNode is LinkedListNode <UIElement> linkedNode)
{
ui._collectionLinkNode = (LinkedListNode <UIElement>)(object) _linkedList.AddBefore((LinkedListNode <T>)(object) linkedNode, ui);
ui.ParentUI = parent;
}
else
{
throw new NotSupportedException();
}
//---
//presentation
parent._needContentLayout = true;
if (parent.CurrentPrimaryRenderElement is IContainerRenderElement parentBox)
{
parentBox.InsertBefore(
beforeUI.GetPrimaryRenderElement(),
ui.GetPrimaryRenderElement());
parent?.InvalidateLayout();
}
}
public static void UpdateLayout <T>(UIElement parent, T ui) where T : UIElement
{
if (ui.NeedContentLayout && !ui.IsInLayoutQueue)
{
ui.InvalidateLayout();
}
parent.InvalidateLayout();
}
public void RemoveAt(UIElement parent, int index)
{
T existing = _list[index];
_list.RemoveAt(index);
existing.ParentUI = null;//clear link
RenderElement parentRenderE = parent.CurrentPrimaryRenderElement;
if (parentRenderE != null)
{
parent.InvalidateLayout();
}
}
public void AddFirst(UIElement parent, T ui)
{
//ui must not have parent before!
CollectionHelper.CheckUI(parent, ui);
_linkedList.AddFirst(ui);
ui.ParentUI = parent;
//---
//presentation
parent._needContentLayout = true;
if (parent.CurrentPrimaryRenderElement is IContainerRenderElement parentBox)
{
parentBox.AddFirst(ui.GetPrimaryRenderElement());
parent?.InvalidateLayout();
}
}
public void Clear(UIElement parent)
{
//clear all child
//and remove parent linkage
for (int i = _list.Count - 1; i >= 0; --i)
{
UIElement ui = _list[i];
ui.ParentUI = null;
UIElement.UnsafeRemoveLinkedNode(ui);
}
_list.Clear();
if (parent.CurrentPrimaryRenderElement is IContainerRenderElement container)
{
container.ClearAllChildren();
parent.CurrentPrimaryRenderElement.InvalidateGraphics();
}
parent.InvalidateLayout();
}
public void AddChild(UIElement ui)
{
if (this.uiList == null)
{
this.uiList = new UICollection(this);
}
needContentLayout = true;
this.uiList.AddUI(ui);
if (this.HasReadyRenderElement)
{
primElement.AddChild(ui);
if (this.panelLayoutKind != BoxContentLayoutKind.Absolute)
{
this.InvalidateLayout();
}
}
if (ui.NeedContentLayout)
{
ui.InvalidateLayout();
}
}