/// <summary>
/// Gets the UiProperty attribute associated with a property. For some reason, PropertyInfo.GetCustomAttributes doesn't return the
/// UiProperty attribute placed on abstract properties that are overridden.
/// </summary>
/// <returns>The user interface property attribute.</returns>
/// <param name="property">Property.</param>
public static UiProperty GetUiPropertyAttribute(PropertyInfo property)
{
if (property == null)
{
return(null);
}
UiProperty attribute = property.GetCustomAttribute <UiProperty>();
if (attribute == null)
{
Type parentType = property.ReflectedType.BaseType;
if (parentType == null)
{
return(null);
}
else
{
return(GetUiPropertyAttribute(parentType.GetProperty(property.Name)));
}
}
else
{
return(attribute);
}
}
/// <summary>
/// Gets a list of StackLayout objects associated with properties in an object that have been
/// decorated with a UiProperty attribute.
/// </summary>
/// <returns>The property stacks.</returns>
/// <param name="o">Object to get StackLayouts for.</param>
public static List <StackLayout> GetPropertyStacks(object o)
{
List <Tuple <PropertyInfo, UiProperty> > propertyUiElements =
o.GetType()
.GetProperties(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic)
.Select(p => new Tuple <PropertyInfo, UiProperty>(p, GetUiPropertyAttribute(p)))
.Where(p => p.Item2 != null)
.OrderBy(p => p.Item2._order).ToList();
List <StackLayout> propertyStacks = new List <StackLayout>();
foreach (Tuple <PropertyInfo, UiProperty> propertyUiElement in propertyUiElements)
{
PropertyInfo property = propertyUiElement.Item1;
UiProperty uiElement = propertyUiElement.Item2;
Label propertyLabel = new Label
{
Text = uiElement.LabelText ?? property.Name + ":",
FontSize = 20
};
BindableProperty targetProperty = null;
IValueConverter converter = null;
View propertyView = uiElement.GetView(property, o, out targetProperty, out converter);
propertyView.IsEnabled = uiElement.Editable;
#if UNIT_TESTING
// set style id so we can get the property value when unit testing
propertyView.StyleId = propertyLabel.Text + " View";
#endif
if (targetProperty != null)
{
propertyView.BindingContext = o;
propertyView.SetBinding(targetProperty, new Binding(property.Name, converter: converter));
}
propertyStacks.Add(new StackLayout
{
Orientation = StackOrientation.Vertical,
VerticalOptions = LayoutOptions.Start,
Children = { propertyLabel, propertyView }
});
}
return(propertyStacks);
}