internal void AddPropertyChangeCallback(PropertyChangedCallback callback)
{
if (this is CustomDependencyProperty)
{
Console.WriteLine("this should really just be done by registering the property with metadata");
CustomDependencyProperty cdp = (CustomDependencyProperty)this;
if (cdp.property_changed_callback != null)
{
throw new InvalidOperationException("this DP was registered with a PropertyChangedCallback already");
}
}
if (change_cb != null)
{
throw new InvalidOperationException("this DP already has a change callback registered");
}
change_cb = callback;
NativeMethods.dependency_property_set_property_changed_callback(native,
CustomUnmanagedPropertyChangedCallbackSafe);
}
private static DependencyProperty RegisterAny(string name, Type propertyType, Type ownerType, PropertyMetadata metadata, bool attached, bool readOnly, bool setsParent, bool custom)
{
ManagedType property_type;
ManagedType owner_type;
UnmanagedPropertyChangeHandler handler = null;
CustomDependencyProperty result;
bool is_nullable = false;
object default_value = DependencyProperty.UnsetValue;
PropertyChangedCallback property_changed_callback = null;
if (name == null)
{
throw new ArgumentNullException("name");
}
if (name.Length == 0)
{
throw new ArgumentException("The 'name' argument cannot be an empty string");
}
if (propertyType == null)
{
throw new ArgumentNullException("propertyType");
}
if (ownerType == null)
{
throw new ArgumentNullException("ownerType");
}
if (propertyType.IsGenericType && propertyType.GetGenericTypeDefinition() == typeof(Nullable <>))
{
is_nullable = true;
// Console.WriteLine ("DependencyProperty.RegisterAny (): found nullable {0}, got nullable {1}", propertyType.FullName, propertyType.GetGenericArguments () [0].FullName);
propertyType = propertyType.GetGenericArguments() [0];
}
Types types = Deployment.Current.Types;
property_type = types.Find(propertyType);
owner_type = types.Find(ownerType);
if (metadata != null)
{
default_value = metadata.DefaultValue ?? UnsetValue;
property_changed_callback = metadata.property_changed_callback;
}
if ((default_value == DependencyProperty.UnsetValue) && propertyType.IsValueType && !is_nullable)
{
default_value = Activator.CreateInstance(propertyType);
}
if (default_value != null && default_value != UnsetValue && !propertyType.IsAssignableFrom(default_value.GetType()))
{
throw new ArgumentException(string.Format("DefaultValue is of type {0} which is not compatible with type {1}", default_value.GetType(), propertyType));
}
if (property_changed_callback != null)
{
handler = UnmanagedPropertyChangedCallbackSafe;
}
Value v;
if (default_value == DependencyProperty.UnsetValue)
{
v = new Value {
Kind = types.TypeToKind(propertyType), IsNull = true
};
default_value = null;
}
else
{
v = Value.FromObject(default_value, true);
}
IntPtr handle;
using (v) {
var val = v;
if (custom)
{
handle = NativeMethods.dependency_property_register_custom_property(name, property_type.native_handle, owner_type.native_handle, ref val, attached, readOnly, handler);
}
else
{
handle = NativeMethods.dependency_property_register_core_property(name, property_type.native_handle, owner_type.native_handle, ref val, attached, readOnly, handler);
}
}
if (handle == IntPtr.Zero)
{
return(null);
}
if (is_nullable)
{
NativeMethods.dependency_property_set_is_nullable(handle, true);
}
result = new CustomDependencyProperty(handle, name, property_type, owner_type, default_value);
result.attached = attached;
result.PropertyChangedHandler = handler;
result.property_changed_callback = property_changed_callback;
return(result);
}
private static DependencyProperty RegisterAny(string name, Type propertyType, Type ownerType, PropertyMetadata metadata, bool attached, bool readOnly, bool setsParent, bool custom)
{
ManagedType property_type;
ManagedType owner_type;
UnmanagedPropertyChangeHandler handler = null;
CustomDependencyProperty result;
bool is_nullable = false;
object default_value = DependencyProperty.UnsetValue;
PropertyChangedCallback property_changed_callback = null;
if (name == null)
throw new ArgumentNullException ("name");
if (name.Length == 0)
throw new ArgumentException("The 'name' argument cannot be an empty string");
if (propertyType == null)
throw new ArgumentNullException ("propertyType");
if (ownerType == null)
throw new ArgumentNullException ("ownerType");
if (propertyType.IsGenericType && propertyType.GetGenericTypeDefinition () == typeof (Nullable<>)) {
is_nullable = true;
// Console.WriteLine ("DependencyProperty.RegisterAny (): found nullable {0}, got nullable {1}", propertyType.FullName, propertyType.GetGenericArguments () [0].FullName);
propertyType = propertyType.GetGenericArguments () [0];
}
Types types = Deployment.Current.Types;
property_type = types.Find (propertyType);
owner_type = types.Find (ownerType);
if (metadata != null) {
default_value = metadata.DefaultValue ?? UnsetValue;
property_changed_callback = metadata.property_changed_callback;
}
if ((default_value == DependencyProperty.UnsetValue) && propertyType.IsValueType && !is_nullable)
default_value = Activator.CreateInstance (propertyType);
if (default_value != null && default_value != UnsetValue && !propertyType.IsAssignableFrom (default_value.GetType ()))
throw new ArgumentException (string.Format ("DefaultValue is of type {0} which is not compatible with type {1}", default_value.GetType (), propertyType));
if (property_changed_callback != null)
handler = UnmanagedPropertyChangedCallbackSafe;
Value v;
if (default_value == DependencyProperty.UnsetValue) {
v = new Value { k = types.TypeToKind (propertyType), IsNull = true };
default_value = null;
} else {
v = Value.FromObject (default_value, true);
}
IntPtr handle;
using (v) {
var val = v;
if (custom)
handle = NativeMethods.dependency_property_register_custom_property (name, property_type.native_handle, owner_type.native_handle, ref val, attached, readOnly, handler);
else
handle = NativeMethods.dependency_property_register_core_property (name, property_type.native_handle, owner_type.native_handle, ref val, attached, readOnly, handler);
}
if (handle == IntPtr.Zero)
return null;
if (is_nullable)
NativeMethods.dependency_property_set_is_nullable (handle, true);
result = new CustomDependencyProperty (handle, name, property_type, owner_type, default_value);
result.attached = attached;
result.PropertyChangedHandler = handler;
result.property_changed_callback = property_changed_callback;
return result;
}
