static bool DoDispatch(BaseVisualElementPanel panel)
{
bool usesEvent;
if (s_EventInstance.type == EventType.Repaint)
{
panel.Repaint(s_EventInstance);
// TODO get rid of this when we wrap every GUIView inside IMGUIContainers
// here we pretend to use the repaint event
// in order to suspend to suspend OnGUI() processing on the native side
// since we've already run it if we have an IMGUIContainer
usesEvent = panel.IMGUIContainersCount > 0;
}
else
{
panel.ValidateLayout();
using (EventBase evt = CreateEvent(s_EventInstance))
{
bool immediate = s_EventInstance.type == EventType.Used || s_EventInstance.type == EventType.Layout || s_EventInstance.type == EventType.ExecuteCommand || s_EventInstance.type == EventType.ValidateCommand;
panel.SendEvent(evt, immediate ? DispatchMode.Immediate : DispatchMode.Queued);
// FIXME: we dont always have to repaint if evt.isPropagationStopped.
if (evt.isPropagationStopped)
{
panel.visualTree.IncrementVersion(VersionChangeType.Repaint);
}
usesEvent = evt.isPropagationStopped;
}
}
return(usesEvent);
}
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);
}
}