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 
17 package com.android.camera.ui.motion;
18 
19 import android.graphics.Canvas;
20 
21 /**
22  * Rendering object that can be driven by an animator instance.
23  */
24 public 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      */
isActive()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      */
draw(long t, long dt, Canvas canvas)40     void draw(long t, long dt, Canvas canvas);
41 }
42