1/*
2 * Copyright (C) 2012 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.dreams.bummer;
18
19import android.content.Context;
20import android.os.Handler;
21import android.os.Message;
22import android.util.AttributeSet;
23import android.view.View;
24import android.widget.TextView;
25
26public class BummerView extends TextView {
27    public static final int START = 1;
28    public static final int MOVE = 2;
29
30    private int mDelay = 10000; // ms
31    private int mAnimTime = 2000; // ms
32    private boolean mAnimate = true;
33
34    private Handler mHandler = new Handler() {
35        @Override
36        public void handleMessage(Message m) {
37            boolean animate = false;
38            switch (m.what) {
39                case MOVE:
40                    animate = mAnimate;
41                    // fall through
42                case START:
43                    final View parent = (View) BummerView.this.getParent();
44                    if (parent == null)
45                        return;
46
47                    final float framew = parent.getMeasuredWidth();
48                    final float frameh = parent.getMeasuredHeight();
49                    final float textw = getMeasuredWidth();
50                    final float texth = getMeasuredHeight();
51
52                    final float newx = (float) (Math.random() * (framew - textw));
53                    final float newy = (float) (Math.random() * (frameh - texth));
54                    if (animate) {
55                        animate().x(newx)
56                                .y(newy)
57                                .setDuration(mAnimTime)
58                                .start();
59                    } else {
60                        setX(newx);
61                        setY(newy);
62                    }
63                    setVisibility(View.VISIBLE);
64
65                    removeMessages(MOVE);
66                    sendEmptyMessageDelayed(MOVE, mDelay);
67                    break;
68            }
69        }
70    };
71
72    public BummerView(Context context) {
73        super(context);
74    }
75
76    public BummerView(Context context, AttributeSet attrs) {
77        this(context, attrs, 0);
78    }
79
80    public BummerView(Context context, AttributeSet attrs, int flags) {
81        super(context, attrs, flags);
82    }
83
84    public void setAnimationParams(boolean animate, int delay, int animTime) {
85        mAnimate = animate;
86        mDelay = delay;
87        mAnimTime = animTime;
88    }
89
90    @Override
91    public void onAttachedToWindow() {
92        final View parent = (View) this.getParent();
93        parent.addOnLayoutChangeListener(new OnLayoutChangeListener() {
94            public void onLayoutChange(View v, int left, int top, int right, int bottom,
95                    int oldLeft, int oldTop, int oldRight, int oldBottom) {
96                if (v == parent && right != oldRight) {
97                    mHandler.removeMessages(MOVE);
98                    mHandler.sendEmptyMessage(START);
99                }
100            }
101        });
102
103        mHandler.sendEmptyMessage(START);
104    }
105
106}
107