public CFilterControl(Popup pppParent,
enFilterTarget filterTarget,
List <FilterPredicate> predicates,
FilterControlCommandHandler FilterCommandFunc,
FilterControlCommandHandler CancelCommandFunc)
{
InitializeComponent();
ParentPopup = pppParent;
FilterTarget = filterTarget;
CloseReason = enCloseReason.LostFocus;
m_FilterPredicatesOnOpen = new List <FilterPredicate>();
foreach (FilterPredicate predicate in predicates)
{
FilterPredicate NewPredicate = new FilterPredicate(predicate);
NewPredicate.PropertyChanged += Predicate_PropertyChanged;
FilterPredicates.Add(NewPredicate);
m_FilterPredicatesOnOpen.Add(new FilterPredicate(predicate));
}
CancelCommand = new CCommand(() =>
{
CloseReason = enCloseReason.Cancel;
CancelCommandFunc(this);
});
FilterCommand = new CCommand(() =>
{
CloseReason = enCloseReason.OK;
FilterCommandFunc(this);
});
Predicate_PropertyChanged(this, null);
}
private void Predicate_PropertyChanged(object sender, PropertyChangedEventArgs e)
{
if (FilterPredicates.All(arg => arg.IsSelected))
{ // Все элементы выбраны
chkSelectAll.IsChecked = true;
}
else if (FilterPredicates.All(arg => !arg.IsSelected))
{ // Все элементы не выбраны
chkSelectAll.IsChecked = false;
}
else
{ // Что-то выбрано, а что-то нет
chkSelectAll.IsChecked = null;
}
FilterCommand.CanExecute = FilterPredicates.Count > 0 && (chkSelectAll.IsChecked == null || chkSelectAll.IsChecked.Value);
}