public void Clear()
{
if (childCount > 0)
{
// Copy children to a temporary list because removing child elements from
// the panel may trigger modifications (DetachFromPanelEvent callback)
// of the same list while we are in the foreach loop.
var elements = VisualElementListPool.Copy(m_Owner.m_Children);
ReleaseChildList();
m_Owner.yogaNode.Clear();
if (m_Owner.requireMeasureFunction)
{
m_Owner.yogaNode.SetMeasureFunction(m_Owner.Measure);
}
foreach (VisualElement e in elements)
{
e.InvokeHierarchyChanged(HierarchyChangeType.Remove);
e.hierarchy.SetParent(null);
e.m_LogicalParent = null;
m_Owner.elementPanel?.OnVersionChanged(e, VersionChangeType.Hierarchy);
}
VisualElementListPool.Release(elements);
m_Owner.IncrementVersion(VersionChangeType.Hierarchy);
}
}
/// <summary>
/// Remove all child elements from this element's contentContainer
/// </summary>
public void Clear()
{
if (childCount > 0)
{
// Copy children to a temporary list because removing child elements from
// the panel may trigger modifications (DetachFromPanelEvent callback)
// of the same list while we are in the foreach loop.
var elements = VisualElementListPool.Copy(m_Owner.m_Children);
ReleaseChildList();
m_Owner.yogaNode.Clear();
m_Owner.AssignMeasureFunction();
foreach (VisualElement e in elements)
{
e.InvokeHierarchyChanged(HierarchyChangeType.Remove);
e.hierarchy.SetParent(null);
e.m_LogicalParent = null;
m_Owner.elementPanel?.OnVersionChanged(e, VersionChangeType.Hierarchy);
}
if (m_Owner.imguiContainerDescendantCount > 0)
{
int totalChange = m_Owner.imguiContainerDescendantCount;
if (m_Owner.isIMGUIContainer)
{
totalChange--;
}
m_Owner.ChangeIMGUIContainerCount(-totalChange);
}
VisualElementListPool.Release(elements);
m_Owner.IncrementVersion(VersionChangeType.Hierarchy);
}
}