protected virtual void AreaControl_Leaving(object sender, WPFUserControl.AutoCompleteTextBoxControlEventArgs e)
{
if (SubAreaControl.ListBoxReadOnly)
{
// get the subareas and let the base class do the work
var countrySubAreas = (CountryControl.GetCurrentObject() as Country)?.SubAreas;
var areaSubAreas = (e.Object as Area)?.SubAreas;
// valid subareas
if ((areaSubAreas != null) && (countrySubAreas != null))
{
// get the subareas belong to both selected area and selected country
if (GetCountrySubAreas(areaSubAreas.ToList(), countrySubAreas.ToList()) is List <SubArea> matchingSubareas)
{
// refresh control
RefreshControl(matchingSubareas.OfType <Location>().ToList(), SubAreaControl);
}
}
}
else
{
RefreshControl(_allSubAreas.OfType <Location>().ToList(), SubAreaControl);
}
// derived class can set the view model property
// take area name from area object (if in database) or from UI text
SetAreaDisplayItem(e.Object is Area area? area.Name : AreaControl.GetCurrentText());
// set focus to the respective text box
SubAreaControl.SetFocus();
}
private void SubjectLocationControl_LeavingViaShift(object sender, AutoCompleteTextBoxControlEventArgs e)
{
SubAreaControl.SetFocus();
}