public bool DoLayoutProperty(SerializedProperty property)
{
if (propIndex.ContainsKey(property.propertyPath) == false)
return false;
// Draw the header
string headerText = string.Format("{0} [{1}]", property.displayName, property.arraySize);
EditorGUILayout.PropertyField(property, new GUIContent(headerText), false);
// Save header rect for handling drag and drop
Rect dropRect = GUILayoutUtility.GetLastRect();
// Draw the reorderable list for the property
if (property.isExpanded)
{
propIndex[property.propertyPath].DoLayoutList();
}
// Handle drag and drop into the header
Event evt = Event.current;
if (evt == null)
return true;
if (evt.type == EventType.dragUpdated || evt.type == EventType.dragPerform)
{
if (dropRect.Contains(evt.mousePosition) == false)
return true;
DragAndDrop.visualMode = DragAndDropVisualMode.Copy;
if (evt.type == EventType.DragPerform)
{
DragAndDrop.AcceptDrag();
foreach (Object dragged_object in DragAndDrop.objectReferences)
{
if (dragged_object.GetType() != property.GetType())
continue;
int newIndex = property.arraySize;
property.arraySize++;
SerializedProperty target = property.GetArrayElementAtIndex(newIndex);
target.objectReferenceInstanceIDValue = dragged_object.GetInstanceID();
}
evt.Use();
}
}
return true;
}
