private void SetupBinding(object source)
{
//sanity check
if (source == null)
{
return;
}
var boundObject = BindExtension.GetObjectFromPath(source, this.Path.Path);
if (boundObject == null)
{
return;
}
//set default BindingMode
if (this.Mode == BindingMode.Default)
{
if (_bindingProperty.GetMetadata(_bindingTarget) is FrameworkPropertyMetadata metadata && metadata.BindsTwoWayByDefault)
{
this.Mode = BindingMode.TwoWay;
}
else
{
this.Mode = BindingMode.OneWay;
}
}
public override object ProvideValue(IServiceProvider serviceProvider)
{
if (serviceProvider.GetService(typeof(IProvideValueTarget)) is IProvideValueTarget valueProvider)
{
_bindingTarget = valueProvider.TargetObject as DependencyObject;
_bindingProperty = valueProvider.TargetProperty as DependencyProperty;
//DataContext, TODO other sources
var dataContextSourceElement = BindExtension.FindDataContextSource(_bindingTarget);
dataContextSourceElement.DataContextChanged += this.DataContextSource_DataContextChanged;
this.SetupBinding(dataContextSourceElement.DataContext);
}
//return default
return(_bindingProperty.DefaultMetadata.DefaultValue);
}
