protected IDisposable SetupControlEnabling(IPropertyManagerPageControl control, IObservable <bool> enabledObservable)
{
return(AfterActivationObs
.Select(_ => enabledObservable)
.Switch()
.Subscribe(v => control.Enabled = v));
}
protected IDisposable CreateComboBox <T, TModel>(
IPropertyManagerPageGroup @group,
string caption,
string tip,
ICompositeList <T> items,
IEqualityComparer <T> itemEqualityComparer,
Func <T, string> itemToStringFn,
TModel model,
Expression <Func <TModel, T> > selectedItemExpression,
Action <IPropertyManagerPageCombobox> config = null)
{
var id = NextId();
var comboBox = @group.CreateComboBox(id, caption, tip);
config?.Invoke(comboBox);
// Sync source collection with SW ComboBox collection
Action <short, T> insert = (index, element) =>
{
var insertIndex = comboBox.InsertItem(index, itemToStringFn(element));
Debug.Assert(insertIndex != -1, "Item couldn't be inserted");
};
Action <short> delete = index =>
{
var deleteIndex = comboBox.DeleteItem(index);
Debug.Assert(deleteIndex != -1, "Item couldn't be deleted");
};
var swComboBoxUpdated = new Subject <Unit>();
var d0 = AfterActivationObs
.Select(_ => items.ChangesObservable(itemEqualityComparer))
.Switch()
.Subscribe(changes =>
{
short index = 0;
foreach (var change in changes)
{
switch (change.Operation)
{
case DiffOperation.Match:
break;
case DiffOperation.Insert:
insert(index++, change.ElementFromCollection2.Value);
break;
case DiffOperation.Delete:
delete(index);
break;
case DiffOperation.Replace:
delete(index);
insert(index++, change.ElementFromCollection2.Value);
break;
case DiffOperation.Modify:
break;
default:
throw new ArgumentOutOfRangeException();
}
}
swComboBoxUpdated.OnNext(Unit.Default);
});
// Sync source to SW selection
var d1 = swComboBoxUpdated
.Select(_ => model.WhenAnyValue(selectedItemExpression))
.Switch()
.Select(selectedItem => items
.Items
.Select(list => (short)list.IndexOf(selectedItem))
)
.Switch()
.AssignTo(comboBox, box => box.CurrentSelection);
// Sync SW to source selection
var selectedItemProxy = selectedItemExpression.GetProxy(model);
var d2 = ComboBoxSelectionObservable(id)
.Select(index => items
.Items
.Select(list => list[index])
)
.Switch()
.AssignTo(selectedItemProxy, p => p.Value);
return(ControlHolder.Create(@group, comboBox, d0, d1, d2, swComboBoxUpdated));
}
