/// <summary>
/// Set appropriate visual state from MultiSelectStates group. (https://msdn.microsoft.com/en-us/library/windows/apps/mt299136.aspx?f=255&MSPPError=-2147217396)
/// </summary>
internal void ApplyMultiSelectState(bool isSelectionMultiple)
{
if (isSelectionMultiple)
{
// We can safely always go to multiselect state
VisualStateManager.GoToState(this, "MultiSelectEnabled", useTransitions: true);
}
else
{
// Retrieve the current state (which 'lives' on the SelectorItem's template root, and may change if it is retemplated)
var currentState = VisualStateManager.GetCurrentState(this, "MultiSelectStates")?.Name;
if (currentState == "MultiSelectEnabled")
{
// The MultiSelectDisabled state goes through VisibleRect then collapsed, which means Disabled state can't be
// invoked if the state is already disabled without having the selected check box appearing briefly. (Issue #403)
VisualStateManager.GoToState(this, "MultiSelectDisabled", useTransitions: true);
}
}
}