public override void SetValue(object value)
{
XamlPropertyValue newValue;
if (value == null)
{
newValue = _property.ParentObject.OwnerDocument.CreateNullValue();
}
else
{
XamlComponentService componentService = _designItem.ComponentService;
XamlDesignItem designItem = value as XamlDesignItem;
if (designItem == null)
{
designItem = (XamlDesignItem)componentService.GetDesignItem(value);
}
if (designItem != null)
{
if (designItem.Parent != null)
{
throw new DesignerException("Cannot set value to design item that already has a parent");
}
newValue = designItem.XamlObject;
}
else
{
XamlPropertyValue val = _property.ParentObject.OwnerDocument.CreatePropertyValue(value, _property);
designItem = componentService.RegisterXamlComponentRecursive(val as XamlObject);
newValue = val;
}
}
UndoService undoService = _designItem.Services.GetService <UndoService>();
if (undoService != null)
{
undoService.Execute(new PropertyChangeAction(this, newValue, true));
}
else
{
SetValueInternal(newValue);
}
}
/// <summary>
/// Creates a new XamlDesignContext instance.
/// </summary>
public XamlDesignContext(XmlReader xamlReader, XamlLoadSettings loadSettings)
{
if (xamlReader == null)
{
throw new ArgumentNullException("xamlReader");
}
if (loadSettings == null)
{
throw new ArgumentNullException("loadSettings");
}
this.Services.AddService(typeof(ISelectionService), new DefaultSelectionService());
this.Services.AddService(typeof(IToolService), new DefaultToolService(this));
this.Services.AddService(typeof(UndoService), new UndoService());
this.Services.AddService(typeof(IErrorService), new DefaultErrorService(this));
this.Services.AddService(typeof(ViewService), new DefaultViewService(this));
this.Services.AddService(typeof(OptionService), new OptionService());
var xamlErrorService = new XamlErrorService();
this.Services.AddService(typeof(XamlErrorService), xamlErrorService);
this.Services.AddService(typeof(IXamlErrorSink), xamlErrorService);
_componentService = new XamlComponentService(this);
this.Services.AddService(typeof(IComponentService), _componentService);
foreach (Action <XamlDesignContext> action in loadSettings.CustomServiceRegisterFunctions)
{
action(this);
}
// register default versions of overridable services:
if (this.Services.GetService(typeof(ITopLevelWindowService)) == null)
{
this.Services.AddService(typeof(ITopLevelWindowService), new WpfTopLevelWindowService());
}
// register extensions from the designer assemblies:
foreach (Assembly designerAssembly in loadSettings.DesignerAssemblies)
{
this.Services.ExtensionManager.RegisterAssembly(designerAssembly);
EditorManager.RegisterAssembly(designerAssembly);
}
_parserSettings = new XamlParserSettings();
_parserSettings.TypeFinder = loadSettings.TypeFinder;
_parserSettings.CreateInstanceCallback = this.Services.ExtensionManager.CreateInstanceWithCustomInstanceFactory;
_parserSettings.ServiceProvider = this.Services;
_doc = XamlParser.Parse(xamlReader, _parserSettings);
loadSettings.ReportErrors(xamlErrorService);
if (_doc == null)
{
string message;
if (xamlErrorService != null && xamlErrorService.Errors.Count > 0)
{
message = xamlErrorService.Errors[0].Message;
}
else
{
message = "Could not load document.";
}
throw new XamlLoadException(message);
}
_rootItem = _componentService.RegisterXamlComponentRecursive(_doc.RootElement);
if (_rootItem != null)
{
var rootBehavior = new RootItemBehavior();
rootBehavior.Intialize(this);
}
_xamlEditOperations = new XamlEditOperations(this, _parserSettings);
}