android/src/com/android/tools/idea/ui/properties/InvalidationListener.java

/*
 * Copyright (C) 2015 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.android.tools.idea.ui.properties;

import org.jetbrains.annotations.NotNull;

/**
 * Listener that is notified any time an observable value may have changed (either directly or
 * because a value it is bound to has become invalidated).
 */
public abstract class InvalidationListener {
  protected abstract void onInvalidated(@NotNull Observable sender);
}