private static bool RenderObjectField <T>(ref ComponentRef <T> componentRef) where T : class
{
bool dataChanged = false;
GameObject gameObject = null;
Component currentComponent = componentRef.GetBaseComponent();
//If T is a type of component can just use a normal object field
if (typeof(Component).IsAssignableFrom(typeof(T)))
{
Component component = EditorGUILayout.ObjectField(kLabel, currentComponent, typeof(T), true) as Component;
gameObject = component != null ? component.gameObject : null;
}
//Otherwise allow gameobject to be set and deal with typing when rendering index
else
{
gameObject = (GameObject)EditorGUILayout.ObjectField(kLabel, currentComponent != null ? currentComponent.gameObject : null, typeof(GameObject), true);
}
//Render drop down for typed components on the gameobject
if (gameObject != null)
{
//Show drop down to allow selecting different components on same game object
int currentIndex = 0;
Component[] allComponents = gameObject.GetComponents <Component>();
List <GUIContent> validComponentLabels = new List <GUIContent>();
List <Component> validComponents = new List <Component>();
List <Type> validComponentTypes = new List <Type>();
for (int i = 0; i < allComponents.Length; i++)
{
T typedComponent = allComponents[i] as T;
if (typedComponent != null)
{
int numberComponentsTheSameType = 0;
foreach (Type type in validComponentTypes)
{
if (type == allComponents[i].GetType())
{
numberComponentsTheSameType++;
}
}
validComponentLabels.Add(new GUIContent(allComponents[i].GetType().Name + (numberComponentsTheSameType > 0 ? " (" + numberComponentsTheSameType + ")" : "")));
validComponents.Add(allComponents[i]);
validComponentTypes.Add(allComponents[i].GetType());
if (allComponents[i] == currentComponent)
{
currentIndex = validComponents.Count - 1;
}
}
}
if (validComponents.Count > 1)
{
int selectedIndex = EditorGUILayout.Popup(kLabel, currentIndex, validComponentLabels.ToArray());
dataChanged = currentComponent != validComponents[selectedIndex] || componentRef.GetComponentIndex() != selectedIndex;
if (dataChanged)
{
componentRef = new ComponentRef <T>(componentRef.GetGameObjectRef().GetSourceType(), validComponents[selectedIndex], selectedIndex);
}
}
else if (validComponents.Count == 1)
{
dataChanged = currentComponent != validComponents[0] || componentRef.GetComponentIndex() != 0;
if (dataChanged)
{
componentRef = new ComponentRef <T>(componentRef.GetGameObjectRef().GetSourceType(), validComponents[0], 0);
}
}
else if (validComponents.Count == 0)
{
dataChanged = currentComponent != null || componentRef.GetComponentIndex() != 0;
if (dataChanged)
{
componentRef = new ComponentRef <T>(componentRef.GetGameObjectRef().GetSourceType());
}
}
}
else
{
dataChanged = currentComponent != null || componentRef.GetComponentIndex() != 0;
if (dataChanged)
{
componentRef = new ComponentRef <T>(componentRef.GetGameObjectRef().GetSourceType());
}
}
return(dataChanged);
}