public static T ObjectSelectorDragDrop <T>(Rect r, string message, string filter = "") where T : class
{
r = EditorGUI.IndentedRect(r);
int controlId = EditorGUIUtility.GetControlID(FocusType.Passive, r);
T objectToReturn = default(T);
Color bgColor = EditorGUIUtility.isProSkin ? JEditorCommon.darkGrey : JEditorCommon.lightGrey;
EditorGUI.DrawRect(r, bgColor);
JEditorCommon.DrawOutlineBox(r, JEditorCommon.midGrey);
Rect messageRect = new Rect();
messageRect.size = new Vector2(r.width, 12);
messageRect.center = r.center - Vector2.up * (messageRect.size.y * 0.5f + 2);
EditorGUI.LabelField(messageRect, message, JEditorCommon.CenteredLabel);
Rect buttonRect = new Rect();
buttonRect.size = new Vector2(47, 15);
buttonRect.center = r.center + Vector2.up * (buttonRect.size.y * 0.5f + 2);
if (GUI.Button(buttonRect, "Browse", JEditorCommon.CenteredLabel))
{
EditorGUIUtility.ShowObjectPicker <Object>(null, false, filter, controlId);
}
JEditorCommon.DrawLine(
new Vector2(buttonRect.min.x, buttonRect.max.y),
new Vector2(buttonRect.max.x, buttonRect.max.y),
CenteredLabel.normal.textColor);
EditorGUIUtility.AddCursorRect(buttonRect, MouseCursor.Link);
Event e = Event.current;
if (e != null &&
r.Contains(e.mousePosition) &&
(e.type == EventType.DragUpdated ||
e.type == EventType.Repaint))
{
Object[] draggedObject = DragAndDrop.objectReferences;
if (draggedObject.Length == 1 &&
draggedObject[0] is T)
{
DragAndDrop.AcceptDrag();
DragAndDrop.visualMode = DragAndDropVisualMode.Copy;
DragAndDrop.activeControlID = controlId;
EditorGUI.DrawRect(r, JUtilities.GetColor(JEditorCommon.selectedItemColor, 0.5f));
JEditorCommon.DrawOutlineBox(r, JEditorCommon.selectedItemColor);
}
}
else if (e != null && e.type == EventType.DragPerform && r.Contains(e.mousePosition))
{
Object[] draggedObject = DragAndDrop.objectReferences;
if (draggedObject.Length == 1 &&
draggedObject[0] is T)
{
objectToReturn = draggedObject[0] as T;
}
}
else if (e != null && e.type == EventType.ExecuteCommand && e.commandName.Equals("ObjectSelectorClosed"))
{
int id = EditorGUIUtility.GetObjectPickerControlID();
Object o = EditorGUIUtility.GetObjectPickerObject();
if (id == controlId && o != null)
{
objectToReturn = o as T;
}
}
return(objectToReturn);
}