DynamicAnimation.java revision 987ee64612e2510004fdf08536746c87234d01c1 
1/*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.camera.ui.motion;
18
19import android.graphics.Canvas;
20
21/**
22 * Rendering object that can be driven by an animator instance.
23 */
24public interface DynamicAnimation {
25
26    /**
27     * Check to determine if this animation is currently in a stable state.
28     *
29     * @return true if the animation is stable, false if it should continue to be redrawn.
30     */
31    boolean isActive();
32
33    /**
34     * Update and draw the animation onto the given canvas.
35     *
36     * @param t current animation frame time.
37     * @param dt delta since the last update.
38     * @param canvas the canvas to draw the animation onto.
39     */
40    void draw(long t, long dt, Canvas canvas);
41}
42