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      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 
     17 package com.android.dreams.bummer;
     18 
     19 import android.content.Context;
     20 import android.os.Handler;
     21 import android.os.Message;
     22 import android.util.AttributeSet;
     23 import android.view.View;
     24 import android.widget.TextView;
     25 
     26 public 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