/// <inheritdoc/>
public InstancedBinding Initiate(
IAvaloniaObject target,
AvaloniaProperty targetProperty,
object anchor = null,
bool enableDataValidation = false)
{
if (Converter == null)
{
throw new NotSupportedException("MultiBinding without Converter not currently supported.");
}
var targetType = targetProperty?.PropertyType ?? typeof(object);
var children = Bindings.Select(x => x.Initiate(target, null));
var input = children.Select(x => x.Subject).CombineLatest().Select(x => ConvertValue(x, targetType));
var mode = Mode == BindingMode.Default ?
targetProperty.GetMetadata(target.GetType()).DefaultBindingMode : Mode;
switch (mode)
{
case BindingMode.OneTime:
return(InstancedBinding.OneTime(input, Priority));
case BindingMode.OneWay:
return(InstancedBinding.OneWay(input, Priority));
default:
throw new NotSupportedException(
"MultiBinding currently only supports OneTime and OneWay BindingMode.");
}
}
public InstancedBinding Initiate(
IAvaloniaObject target,
AvaloniaProperty targetProperty,
object anchor = null,
bool enableDataValidation = false)
{
return(InstancedBinding.OneTime(_source));
}
private InstancedBinding Clone(InstancedBinding sourceInstance, IStyle style, IObservable <bool> activator)
{
if (activator != null)
{
var description = style?.ToString();
switch (sourceInstance.Mode)
{
case BindingMode.OneTime:
if (sourceInstance.Observable != null)
{
var activated = new ActivatedObservable(activator, sourceInstance.Observable, description);
return(InstancedBinding.OneTime(activated, BindingPriority.StyleTrigger));
}
else
{
var activated = new ActivatedValue(activator, sourceInstance.Value, description);
return(InstancedBinding.OneTime(activated, BindingPriority.StyleTrigger));
}
case BindingMode.OneWay:
{
var activated = new ActivatedObservable(activator, sourceInstance.Observable, description);
return(InstancedBinding.OneWay(activated, BindingPriority.StyleTrigger));
}
case BindingMode.OneWayToSource:
{
var activated = new ActivatedSubject(activator, sourceInstance.Subject, description);
return(InstancedBinding.OneWayToSource(activated, BindingPriority.StyleTrigger));
}
case BindingMode.TwoWay:
{
var activated = new ActivatedSubject(activator, sourceInstance.Subject, description);
return(InstancedBinding.TwoWay(activated, BindingPriority.StyleTrigger));
}
default:
throw new NotSupportedException("Unsupported BindingMode.");
}
}
else
{
return(sourceInstance.WithPriority(BindingPriority.Style));
}
}
/// <summary>
/// Selects the child items of an item.
/// </summary>
/// <param name="item">The item.</param>
/// <returns>The child items, or null if no child items.</returns>
public InstancedBinding ItemsSelector(object item)
{
return(InstancedBinding.OneTime(this?._itemsSelector(item)));
}
