protected virtual BindingDescriptor CreateBindingDescriptor(BindingDescriptor source)
{
return(new BindingDescriptor
{
Mode = source.Mode,
Priority = source.Priority,
Property = source.Property,
Source = this,
});
}
/// <summary>
/// Gets or sets a binding for a <see cref="PerspexProperty"/>.
/// </summary>
/// <param name="binding">The binding information.</param>
public IObservable <object> this[BindingDescriptor binding]
{
get
{
return(new BindingDescriptor
{
Mode = binding.Mode,
Priority = binding.Priority,
Property = binding.Property,
Source = this,
});
}
set
{
var mode = (binding.Mode == BindingMode.Default) ?
binding.Property.DefaultBindingMode :
binding.Mode;
var sourceBinding = value as BindingDescriptor;
if (sourceBinding == null && mode != BindingMode.OneWay)
{
throw new InvalidOperationException("Can only bind OneWay to plain IObservable.");
}
switch (mode)
{
case BindingMode.Default:
case BindingMode.OneWay:
Bind(binding.Property, value, binding.Priority);
break;
case BindingMode.OneTime:
SetValue(binding.Property, sourceBinding.Source.GetValue(sourceBinding.Property), binding.Priority);
break;
case BindingMode.OneWayToSource:
sourceBinding.Source.Bind(sourceBinding.Property, GetObservable(binding.Property), binding.Priority);
break;
case BindingMode.TwoWay:
BindTwoWay(binding.Property, sourceBinding.Source, sourceBinding.Property);
break;
}
}
}
/// <summary>
/// Gets or sets a binding for a <see cref="PerspexProperty"/>.
/// </summary>
/// <param name="binding">The binding information.</param>
public IObservable <object> this[BindingDescriptor binding]
{
get
{
return(CreateBindingDescriptor(binding));
}
set
{
var mode = (binding.Mode == BindingMode.Default) ?
binding.Property.DefaultBindingMode :
binding.Mode;
var sourceBinding = value as BindingDescriptor;
if (sourceBinding == null && mode > BindingMode.OneWay)
{
mode = BindingMode.OneWay;
}
switch (mode)
{
case BindingMode.Default:
case BindingMode.OneWay:
Bind(binding.Property, value, binding.Priority);
break;
case BindingMode.OneTime:
SetValue(binding.Property, sourceBinding.Source.GetValue(sourceBinding.Property), binding.Priority);
break;
case BindingMode.OneWayToSource:
sourceBinding.Source.Bind(sourceBinding.Property, GetObservable(binding.Property), binding.Priority);
break;
case BindingMode.TwoWay:
BindTwoWay(binding.Property, sourceBinding.Source, sourceBinding.Property);
break;
}
}
}
