void ChangePanel(BaseVisualElementPanel p)
{
if (panel == p)
{
return;
}
if (panel != null)
{
using (var e = DetachFromPanelEvent.GetPooled(panel, p))
{
e.target = this;
elementPanel.SendEvent(e, DispatchMode.Immediate);
}
}
IPanel prevPanel = panel;
elementPanel = p;
if (panel != null)
{
using (var e = AttachToPanelEvent.GetPooled(prevPanel, p))
{
e.target = this;
elementPanel.SendEvent(e, DispatchMode.Immediate);
}
}
// styles are dependent on topology
IncrementVersion(VersionChangeType.StyleSheet | VersionChangeType.Layout | VersionChangeType.Transform);
// persistent data key may have changed or needs initialization
if (!string.IsNullOrEmpty(persistenceKey))
{
IncrementVersion(VersionChangeType.PersistentData);
}
}
internal virtual void ChangePanel(BaseVisualElementPanel p)
{
if (panel == p)
{
return;
}
if (panel != null)
{
using (var e = DetachFromPanelEvent.GetPooled())
{
e.target = this;
UIElementsUtility.eventDispatcher.DispatchEvent(e, panel);
}
}
elementPanel = p;
if (panel != null)
{
using (var e = AttachToPanelEvent.GetPooled())
{
e.target = this;
UIElementsUtility.eventDispatcher.DispatchEvent(e, panel);
}
}
Dirty(ChangeType.Styles);
if (m_Children != null && m_Children.Count > 0)
{
for (var index = 0; index < m_Children.Count; index++)
{
var child = m_Children[index];
child.ChangePanel(p);
}
}
}
