/// <summary>
/// Initializes a new instance of the <see cref="FrameworkTemplate"/> class.
/// </summary>
/// <param name="template">The UVML template that this instance represents.</param>
/// <param name="dataSourceWrapperName">The name of the template's data source wrapper type.</param>
protected FrameworkTemplate(UvmlTemplate template, String dataSourceWrapperName)
{
Contract.Require(template, nameof(template));
this.template = template;
this.dataSourceWrapperName = dataSourceWrapperName;
}
/// <summary>
/// Loads an instance of the <see cref="PresentationFoundationView"/> from an XML node.
/// </summary>
/// <param name="uv">The Ultraviolet context.</param>
/// <param name="uiPanel">The <see cref="UIPanel"/> that is creating the panel.</param>
/// <param name="uiPanelDefinition">The <see cref="UIPanelDefinition"/> that defines the view.</param>
/// <param name="vmfactory">A view model factory which is used to create the view's initial view model, or <see langword="null"/> to skip view model creation.</param>
/// <returns>The <see cref="PresentationFoundationView"/> that was loaded from the specified XML element.</returns>
public static PresentationFoundationView Load(UltravioletContext uv, UIPanel uiPanel, UIPanelDefinition uiPanelDefinition, UIViewModelFactory vmfactory)
{
Contract.Require(uv, nameof(uv));
Contract.Require(uiPanel, nameof(uiPanel));
Contract.Require(uiPanelDefinition, nameof(uiPanelDefinition));
var viewElement = uiPanelDefinition.ViewElement;
if (viewElement == null)
{
return(null);
}
// Determine which culture to use when parsing values.
var cultureRequested = (String)uiPanelDefinition.RootElement.Attribute("Culture");
var cultureInfo = CultureInfo.GetCultureInfo(cultureRequested ?? String.Empty);
// Determine the type of view model used by this view.
var viewModelType = default(Type);
var viewModelTypeName = (String)viewElement.Attribute("ViewModelType");
if (viewModelTypeName != null)
{
viewModelType = Type.GetType(viewModelTypeName, false);
if (viewModelType == null)
{
throw new UvmlException(PresentationStrings.ViewModelTypeNotFound.Format(viewModelTypeName));
}
var viewModelWrapperAttr = viewModelType.GetCustomAttributes(typeof(ViewModelWrapperAttribute), false)
.Cast <ViewModelWrapperAttribute>().SingleOrDefault();
if (viewModelWrapperAttr != null)
{
viewModelType = viewModelWrapperAttr.WrapperType;
}
else
{
var viewModelWrapperName = PresentationFoundationView.GetDataSourceWrapperNameForView(uiPanelDefinition.AssetFilePath);
var viewModelWrapperType = uv.GetUI().GetPresentationFoundation().GetDataSourceWrapperTypeByName(viewModelWrapperName);
if (viewModelWrapperType == null)
{
throw new UvmlException(PresentationStrings.CannotFindViewModelWrapper.Format(viewModelWrapperName));
}
viewModelType = viewModelWrapperType;
}
}
// Create a UVML template which will instantiate the view.
var viewTemplate = new UvmlTemplate(viewElement, typeof(PresentationFoundationView), (puv, pname) =>
{
var view = new PresentationFoundationView(puv, uiPanel, viewModelType);
var viewModel = vmfactory == null ? null : vmfactory(view);
if (viewModel != null)
{
view.SetViewModel(viewModel);
}
var root = view.LayoutRoot;
root.BeginInit();
var rootAdornerDecorator = new AdornerDecorator(puv, null);
rootAdornerDecorator.BeginInit();
root.Child = rootAdornerDecorator;
var rootGridTemplate = CreateTemplateFromXml(puv, viewElement, null, typeof(Grid), cultureInfo);
var rootGridContext = UvmlInstantiationContext.ForView(puv, view);
var rootGridTemplateInstance = (UvmlTemplateInstance)rootGridTemplate.Instantiate(puv, rootGridContext);
var rootGrid = (Grid)rootGridTemplateInstance.Finalize();
rootAdornerDecorator.Child = rootGrid;
return(view);
});
// Instantiate the view template.
var viewTemplateInstance = (UvmlTemplateInstance)viewTemplate.Instantiate(uv, null);
var viewInstance = (PresentationFoundationView)viewTemplateInstance.Finalize();
var viewRoot = viewInstance.LayoutRoot;
var viewRootAdornerDecorator = (AdornerDecorator)viewRoot.Child;
viewRootAdornerDecorator.EndInit();
viewRoot.EndInit();
viewRoot.CacheLayoutParameters();
var viewInstanceViewModel = viewInstance.ViewModel;
if (viewInstanceViewModel != null)
{
viewInstance.Namescope.PopulateFieldsFromRegisteredElements(viewInstanceViewModel);
}
return(viewInstance);
}
/// <summary>
/// Creates a new <see cref="UvmlTemplate"/> from the specified XML element.
/// </summary>
private static UvmlTemplate CreateTemplateFromXml(UltravioletContext uv,
XElement xml, Type templatedParentType, Type templatedObjectType, CultureInfo cultureInfo)
{
var mutators = new List <UvmlMutator>();
templatedObjectType = ResolveTypeFromName(uv, templatedParentType, templatedObjectType, xml.Name.LocalName);
// Create mutators from attributes
var attrs = xml.Attributes().ToList();
foreach (var attr in attrs)
{
switch (attr.Name.LocalName)
{
case "Name":
case "Class":
case "ViewModelType":
case "BindingContext":
continue;
}
var mutator = CreateMutatorForXmlAttribute(uv, xml, attr, templatedParentType, templatedObjectType, cultureInfo);
mutators.Add(mutator);
}
// Sort elements into "properties/events" and "children"
var elems = xml.Elements().ToList();
var elemsRepresentingProperties = elems.Where(x => x.Name.LocalName.Contains('.')).ToList();
var elemsRepresentingChildren = elems.Except(elemsRepresentingProperties).ToList();
// Create mutators from elements representing properties
if (elemsRepresentingProperties.Any())
{
foreach (var elem in elemsRepresentingProperties)
{
var mutator = CreateMutatorForXmlElement(uv, xml, elem, templatedParentType, templatedObjectType, cultureInfo);
mutators.Add(mutator);
}
}
// Create mutators from child elements
if (elemsRepresentingChildren.Any())
{
var mutator = CreateMutatorForXmlChildren(uv, xml, elemsRepresentingChildren, templatedParentType, templatedObjectType, cultureInfo);
mutators.Add(mutator);
}
else
{
// Create mutator for simple default property
var mutator = CreateMutatorForLiteralDefaultProperty(uv, xml, templatedParentType, templatedObjectType, cultureInfo);
if (mutator != null)
{
mutators.Add(mutator);
}
}
var template = new UvmlTemplate(xml, templatedObjectType, null, mutators);
template.IsItemsPanelForTemplatedParent = typeof(UIElement).IsAssignableFrom(templatedObjectType) &&
String.Equals(xml.Name.LocalName, "ItemsPanel", StringComparison.Ordinal);
return(template);
}
/// <summary>
/// Initializes a new instance of the <see cref="DataTemplate"/> class.
/// </summary>
/// <param name="template">The UVML template that this instance represents.</param>
/// <param name="dataSourceWrapperName">The name of the template's data source wrapper type.</param>
public DataTemplate(UvmlTemplate template, String dataSourceWrapperName)
: base(template, dataSourceWrapperName)
{
}