public ItemFromListProviderViewModel(Dictionary <T, SelectOption>?items,
IComparer <CheckableSelectOption <T> > comparer,
Func <T, bool> shouldBeSelected,
bool asFlags,
T?current = default)
{
Items = items;
this.asFlags = asFlags;
this.items = AutoDispose(new SourceList <CheckableSelectOption <T> >());
ReadOnlyObservableCollection <CheckableSelectOption <T> > outFilteredList;
currentFilter = AutoDispose(new ReactiveProperty <Func <CheckableSelectOption <T>, bool> >(_ => true,
Compare.Create <Func <CheckableSelectOption <T>, bool> >((_, _) => false, _ => 0)));
AutoDispose(this.items.Connect()
.Filter(currentFilter)
.Sort(comparer)
.Bind(out outFilteredList)
.Subscribe());
FilteredItems = outFilteredList;
if (items != null)
{
this.items.Edit(list =>
{
foreach (T key in items.Keys)
{
bool isSelected = shouldBeSelected(key);
var item = new CheckableSelectOption <T>(key, items[key], isSelected);
if (isSelected)
{
SelectedItem = item;
}
list.Add(item);
}
});
}
Columns = new ObservableCollection <ColumnDescriptor>
{
new("Key", "Entry", 80),
new("Name", "Name", 220),
new("Description", "Description", 320)
};
if (asFlags)
{
Columns.Insert(0, new ColumnDescriptor("", "IsChecked", 35, true));
}
if (items == null || items.Count == 0)
{
SearchText = current != null?current.ToString() ?? "" : "";
}
ShowItemsList = items?.Count > 0;
DesiredHeight = ShowItemsList ? 670 : 130;
DesiredWidth = ShowItemsList ? 800 : 400;
Accept = new DelegateCommand(() =>
{
if (SelectedItem == null && FilteredItems.Count == 1)
{
SelectedItem = FilteredItems[0];
}
CloseOk?.Invoke();
}, () => asFlags || SelectedItem != null || FilteredItems.Count == 1 || int.TryParse(SearchText, out _));
Cancel = new DelegateCommand(() => CloseCancel?.Invoke());
FilteredItems.ObserveCollectionChanges().Subscribe(_ => Accept.RaiseCanExecuteChanged());
this.WhenPropertyChanged(t => t.SearchText).Subscribe(_ => Accept.RaiseCanExecuteChanged());
this.WhenPropertyChanged(t => t.SelectedItem).Subscribe(_ => Accept.RaiseCanExecuteChanged());
}
public ItemFromListProviderViewModel(Dictionary <long, SelectOption> items, bool asFlags, long?current = null)
{
this.asFlags = asFlags;
this.items = AutoDispose(new SourceList <CheckableSelectOption>());
ReadOnlyObservableCollection <CheckableSelectOption> outFilteredList;
currentFilter = AutoDispose(new ReactiveProperty <Func <CheckableSelectOption, bool> >(_ => true,
Compare.Create <Func <CheckableSelectOption, bool> >((_, _) => false, _ => 0)));
AutoDispose(this.items.Connect()
.Filter(currentFilter)
.Sort(Comparer <CheckableSelectOption> .Create((x, y) => x.Entry.CompareTo(y.Entry)))
.Bind(out outFilteredList)
.Subscribe());
FilteredItems = outFilteredList;
this.items.Edit(list =>
{
foreach (long key in items.Keys)
{
bool isSelected = current.HasValue && ((current == 0 && key == 0) || (key > 0) && (current & key) == key);
var item = new CheckableSelectOption(key, items[key], isSelected);
if (isSelected)
{
SelectedItem = item;
}
list.Add(item);
}
});
Columns = new ObservableCollection <ColumnDescriptor>
{
new("Key", "Entry", 50),
new("Name", "Name"),
new("Description", "Description")
};
if (asFlags)
{
Columns.Insert(0, new ColumnDescriptor("", "IsChecked", 35, true));
}
if (items.Count == 0)
{
SearchText = current.HasValue ? current.Value.ToString() : "";
}
ShowItemsList = items.Count > 0;
DesiredHeight = ShowItemsList ? 470 : 130;
Accept = new DelegateCommand(() =>
{
if (SelectedItem == null && FilteredItems.Count == 1)
{
SelectedItem = FilteredItems[0];
}
CloseOk?.Invoke();
}, () => asFlags || SelectedItem != null || FilteredItems.Count == 1 || int.TryParse(SearchText, out _));
Cancel = new DelegateCommand(() => CloseCancel?.Invoke());
FilteredItems.ObserveCollectionChanges().Subscribe(_ => Accept.RaiseCanExecuteChanged());
this.WhenPropertyChanged(t => t.SearchText).Subscribe(_ => Accept.RaiseCanExecuteChanged());
this.WhenPropertyChanged(t => t.SelectedItem).Subscribe(_ => Accept.RaiseCanExecuteChanged());
}
