/// <summary>
/// Reloads all PropertyNodes in PropertyGrid, recreating all PropertyNodes</summary>
protected virtual void Reload()
{
// Destroy and unsubscribe from old properties
if (Properties != null)
{
foreach (PropertyNode node in Properties)
{
node.UnBind();
node.ValueSet -= new EventHandler(node_ValueSet);
node.ValueError -= new EventHandler(node_ValueError);
}
}
object[] instances = Instances.Cast <object>().ToArray();
// TODO: cache and reuse PropertyNodes where possible to prevent having to
// rebuild all of the data templates
IEnumerable <PropertyDescriptor> descriptors = null;
if (CustomPropertyDescriptors != null)
{
descriptors = CustomPropertyDescriptors;
}
else if (Instances != null)
{
descriptors = PropertyUtils.GetSharedProperties(instances);
}
var propertyNodes = new ObservableCollection <PropertyNode>();
foreach (var descriptor in descriptors)
{
if (descriptor.IsBrowsable)
{
PropertyNode node = null;
if (PropertyFactory != null)
{
node = PropertyFactory.CreateProperty(instances, descriptor, true, this);
}
else
{
node = new PropertyNode(instances, descriptor, true, this);
}
node.ValueSet += new EventHandler(node_ValueSet);
node.ValueError += new EventHandler(node_ValueError);
propertyNodes.Add(node);
}
}
Properties = propertyNodes;
}
/// <summary>
/// Returns a sequence of property descriptors for the selected objects</summary>
/// <returns>Sequence of property descriptors for the selected objects</returns>
/// <remarks>Default behavior is to return only the descriptors common to all
/// selected objects; override to customize.</remarks>
protected virtual IEnumerable <PropertyDescriptor> GetPropertyDescriptors()
{
return(PropertyUtils.GetSharedProperties(Items)); // only props shared by all selected objects
}
