internal static void FillBoundView(IBoundView view, Context context, IAttributeSet attrs)
{
TypedArray attrArr = context.ObtainStyledAttributes(attrs, Resource.Styleable.BoundItem);
view.Binding = attrArr.GetString(Resource.Styleable.BoundItem_binding);
view.VisibilityBinding = attrArr.GetString(Resource.Styleable.BoundItem_visibility_binding);
}
protected void UpdateProperty(IBoundView view, Dictionary <string, object> cache, Dictionary <string, bool> didChange, List <string> didUpdate)
{
if (view.Binding == null)
{
return;
}
if (!didUpdate.Contains(view.Binding))
{
object val = Expressions.Property.Get(_model, _props[view.Binding].Name);//_props[view.Binding].GetValue(_model);
if (cache.ContainsKey(view.Binding))
{
if (cache[view.Binding] != val)
{
cache[view.Binding] = val;
didChange.Add(view.Binding, true);
}
else
{
didChange.Add(view.Binding, false);
}
}
else
{
cache.Add(view.Binding, val);
didChange.Add(view.Binding, true);
}
didUpdate.Add(view.Binding);
}
if (view.AlwaysUpdate || didChange.ContainsKey(view.Binding))
{
view.Apply(cache[view.Binding]);
}
}
public ViewDynamicAccess(IBoundView View)
{
view = View;
var viewType = View.GetType();
var fields = viewType.GetFields(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
var properties =
viewType.GetProperties(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
var delcaredMembers = viewType.GetMembers(BindingFlags.DeclaredOnly | BindingFlags.Instance |
BindingFlags.Public | BindingFlags.NonPublic);
fieldsDictionary = new Dictionary <string, FieldInfo>();
foreach (var fieldInfo in fields)
{
fieldsDictionary.Add(fieldInfo.Name, fieldInfo);
}
propertiesDictionary = new Dictionary <string, PropertyInfo>();
foreach (var propertyInfo in properties)
{
propertiesDictionary.Add(propertyInfo.Name, propertyInfo);
}
declaredDictionary = new Dictionary <string, MemberInfo>();
foreach (var delcaredMember in delcaredMembers)
{
declaredDictionary.Add(delcaredMember.Name, delcaredMember);
}
}
protected ABoundViewModel(IBoundView View)
{
view = View;
Bind(View);
var classBinding = GetType().GetCustomAttributes().FirstOrDefault(a => a is ClassBindingAttribute);
var attribute = classBinding as ClassBindingAttribute;
if (attribute != null)
{
SetModel(ModelFactory.GetFactory(attribute.ModelType).GetModel());
}
}
public void Bind(IBoundView View)
{
View.Binder = new ViewDynamicAccess(View);
var viewModelType = GetType();
foreach (var memberInfo in viewModelType.GetMembers(BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.Instance | BindingFlags.FlattenHierarchy))
{
foreach (Attribute attribute in memberInfo.GetCustomAttributes(false))
{
var type = attribute.GetType();
if (type == typeof(EventBinder))
{
var eventBinder = attribute as EventBinder;
if (eventBinder != null)
{
dynamic propertyForEvent;
if (!View.Binder.GetValue(eventBinder.PropertyToBind, out propertyForEvent))
{
continue;
}
var eventInfo = propertyForEvent.GetType()
.GetEvent(eventBinder.EventToBindName ?? eventBinder.EventToBind.ToString());
if (eventInfo == null)
{
continue;
}
var addHandler = eventInfo.GetAddMethod();
var methodInfo = viewModelType.GetMethod(memberInfo.Name,
BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.Instance);
if (methodInfo == null)
{
continue;
}
var @delegate = Delegate.CreateDelegate(eventInfo.EventHandlerType, this, methodInfo);
Object[] addHandlerArgs = { @delegate };
addHandler.Invoke(propertyForEvent, addHandlerArgs);
}
}
}
}
foreach (var propertyInfo in viewModelType.GetProperties(BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.Instance))
{
foreach (Attribute attribute in propertyInfo.GetCustomAttributes(false))
{
var type = attribute.GetType();
var property = propertyInfo.GetValue(this);
if (type == typeof(DataBinder))
{
if (!(propertyInfo.PropertyType.Name.Contains("BoundProperty") || propertyInfo.PropertyType == typeof(Object)))
{
continue;
}
var dataBinder = attribute as DataBinder;
if (dataBinder == null)
{
continue;
}
if (property == null)
{
if (propertyInfo.PropertyType == typeof(Object) && dataBinder.GenericType == null)
{
continue;
}
var genericType = dataBinder.GenericType == null
? propertyInfo.PropertyType.GetGenericArguments().First()
: dataBinder.GenericType;
var propertyType = typeof(BoundProperty <>).MakeGenericType(genericType);
property = Activator.CreateInstance(propertyType);
propertyInfo.SetValue(this, property);
}
var boundProperty = property as ABoundProperty;
if (boundProperty != null)
{
boundProperty.ViewBinder = View.Binder;
boundProperty.PropertyName = dataBinder.PropertyToBind;
boundProperty.CanRead = CanRead(dataBinder);
boundProperty.CanWrite = CanWrite(dataBinder);
boundProperty.OneTime = dataBinder.Type == DataBindType.OneTime;
}
}
else if (type == typeof(MethodBinder))
{
var methodBinder = attribute as MethodBinder;
if (methodBinder != null)
{
if (property == null)
{
if (!(propertyInfo.PropertyType.Name.Contains("BoundMethod") || propertyInfo.PropertyType == typeof(Object)))
{
continue;
}
var genericType = methodBinder.GenericType == null
? propertyInfo.PropertyType.GetGenericArguments().First()
: methodBinder.GenericType;
var propertyType = typeof(BoundMethod <>).MakeGenericType(genericType);
property = Activator.CreateInstance(propertyType);
propertyInfo.SetValue(this, property);
}
View.Binder.BindMethod(methodBinder.MethodToBind, property);
}
}
}
}
}
protected void UpdateVisibility(IBoundView view, Dictionary <string, object> cache, Dictionary <string, bool> didChange, List <string> didUpdate)
{
if (view.VisibilityBinding == null)
{
return;
}
bool inverted = view.VisibilityBinding.StartsWith("!");
string bind = view.VisibilityBinding;
if (inverted)
{
bind = bind.Substring(1);
}
if (!didUpdate.Contains(bind))
{
object val = Expressions.Property.Get(_model, _props[bind].Name);//_props[bind].GetValue(_model);
if (cache.ContainsKey(bind))
{
if (cache[bind] != val)
{
cache[bind] = val;
didChange.Add(bind, true);
}
else
{
didChange.Add(bind, false);
}
}
else
{
cache.Add(bind, val);
didChange.Add(bind, true);
}
didUpdate.Add(bind);
}
if (didChange.ContainsKey(bind))
{
bool val = (bool)cache[bind];
if (inverted)
{
if (!val)
{
view.SetVisibility(ViewStates.Visible);
}
else
{
view.SetVisibility(ViewStates.Gone);
}
}
else
{
if (val)
{
view.SetVisibility(ViewStates.Visible);
}
else
{
view.SetVisibility(ViewStates.Gone);
}
}
}
}
