void DrawState(int index)
{
if (index < 0 || index >= m_Target.States.Count)
{
return;
}
//Find the States variable in our serializedObject. serializedObject is a special way to access and modify the variables
//of our component to which Unity added a lot of helper functionality. For example, if you modify values though the
//serializedObject instead of modifying the component directly, Unity automatically creates Undo and Redo functionality
//for you
SerializedProperty listIterator = serializedObject.FindProperty("States");
GUILayout.BeginHorizontal();
{
//If this object is an instantiated prefab, we want to mirror Unitys default inspector behaviour where
//variables that have been modified (but not applied) are drawn in bold text
if (listIterator.isInstantiatedPrefab == true)
{
//The SetBoldDefaultFont functionality is usually hidden from us but we can use some tricks to
//access the method anyways. See the implementation of our own EditorGUIHelper.SetBoldDefaultFont
//for more info
EditorGUIHelper.SetBoldDefaultFont(listIterator.GetArrayElementAtIndex(index).prefabOverride);
}
GUILayout.Label("Name", EditorStyles.label, GUILayout.Width(50));
//BeginChangeCheck() is a useful way to see if an inspector variable was changed between
//BeginChangeCheck() and EndChangeCheck()
EditorGUI.BeginChangeCheck();
string newName = GUILayout.TextField(m_Target.States[index].Name, GUILayout.Width(120));
Vector3 newPosition = EditorGUILayout.Vector3Field("", m_Target.States[index].Position);
//If a variable was modified, EndChangeCheck() returns true so we can do neccessary behaviour like storing the changes
if (EditorGUI.EndChangeCheck())
{
//Create an Undo/Redo step for this modification
Undo.RecordObject(m_Target, "Modify State");
m_Target.States[index].Name = newName;
m_Target.States[index].Position = newPosition;
//Whenever you modify a component variable directly without using serializedObject you need to tell
//Unity that this component has changed so the values are saved next time the user saves the project.
EditorUtility.SetDirty(m_Target);
}
EditorGUIHelper.SetBoldDefaultFont(false);
if (GUILayout.Button("Remove"))
{
EditorApplication.Beep();
//DisplayDialog is a very useful method to create a simple popup check. You can use this to simply display information to the user
//that something has changed which the user has to confirm by clicking OK, or you can even ask simple Yes, No questions to,
//like in this example, ask if the user really wants to delete something
if (EditorUtility.DisplayDialog("Really?", "Do you really want to remove the state '" + m_Target.States[index].Name + "'?", "Yes", "No") == true)
{
Undo.RecordObject(m_Target, "Delete State");
m_Target.States.RemoveAt(index);
EditorUtility.SetDirty(m_Target);
}
}
}
GUILayout.EndHorizontal();
}
