/// <summary>
/// Updates the state of the visual.
/// </summary>
/// <param name="useTransitions">If set to <c>true</c> use transitions.</param>
/// <remarks>The header will follow the parent <see cref="AccordionItem"/> states.</remarks>
internal virtual void UpdateVisualState(bool useTransitions)
{
// the visualstate of the header is completely dependent on the parent state.
if (this.ParentAccordionItem == null)
{
return;
}
if (this.ParentAccordionItem.IsSelected)
{
VisualStates.GoToState(this, useTransitions, VisualStates.StateExpanded);
}
else
{
VisualStates.GoToState(this, useTransitions, VisualStates.StateCollapsed);
}
switch (this.ParentAccordionItem.ExpandDirection)
{
// no animations on an expanddirection change.
case ExpandDirection.Down:
VisualStates.GoToState(this, false, VisualStates.StateExpandDown);
break;
case ExpandDirection.Up:
VisualStates.GoToState(this, false, VisualStates.StateExpandUp);
break;
case ExpandDirection.Left:
VisualStates.GoToState(this, false, VisualStates.StateExpandLeft);
break;
default:
VisualStates.GoToState(this, false, VisualStates.StateExpandRight);
break;
}
}