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      1 /*
      2  * Copyright (C) 2010 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.test.hwui;
     18 
     19 import android.animation.ObjectAnimator;
     20 import android.app.Activity;
     21 import android.content.Context;
     22 import android.graphics.Canvas;
     23 import android.graphics.Paint;
     24 import android.graphics.Path;
     25 import android.os.Bundle;
     26 import android.view.View;
     27 
     28 @SuppressWarnings({"UnusedDeclaration"})
     29 public class ScaledTextActivity extends Activity {
     30 
     31     @Override
     32     protected void onCreate(Bundle savedInstanceState) {
     33         super.onCreate(savedInstanceState);
     34 
     35         final ScaledTextView view = new ScaledTextView(this);
     36         setContentView(view);
     37 
     38         ObjectAnimator animation = ObjectAnimator.ofFloat(view, "textScale", 1.0f, 10.0f);
     39         animation.setDuration(3000);
     40         animation.setRepeatCount(ObjectAnimator.INFINITE);
     41         animation.setRepeatMode(ObjectAnimator.REVERSE);
     42         animation.start();
     43 
     44     }
     45 
     46     public static class ScaledTextView extends View {
     47         private static final String TEXT = "Hello libhwui! ";
     48 
     49         private final Paint mPaint;
     50         private final Paint mShadowPaint;
     51         private final Path mPath;
     52 
     53         private float mScale = 1.0f;
     54 
     55         public ScaledTextView(Context c) {
     56             super(c);
     57             setLayerType(LAYER_TYPE_HARDWARE, null);
     58 
     59             mPath = makePath();
     60 
     61             mPaint = new Paint();
     62             mPaint.setAntiAlias(true);
     63             mPaint.setTextSize(20.0f);
     64 
     65             mShadowPaint = new Paint();
     66             mShadowPaint.setAntiAlias(true);
     67             mShadowPaint.setShadowLayer(3.0f, 0.0f, 3.0f, 0xff000000);
     68             mShadowPaint.setTextSize(20.0f);
     69         }
     70 
     71         public float getTextScale() {
     72             return mScale;
     73         }
     74 
     75         public void setTextScale(float scale) {
     76             mScale = scale;
     77             invalidate();
     78         }
     79 
     80         private static Path makePath() {
     81             Path path = new Path();
     82             buildPath(path);
     83             return path;
     84         }
     85 
     86         private static void buildPath(Path path) {
     87             path.moveTo(0.0f, 0.0f);
     88             path.cubicTo(0.0f, 0.0f, 100.0f, 150.0f, 100.0f, 200.0f);
     89             path.cubicTo(100.0f, 200.0f, 50.0f, 300.0f, -80.0f, 200.0f);
     90             path.cubicTo(-80.0f, 200.0f, 100.0f, 200.0f, 200.0f, 0.0f);
     91         }
     92 
     93         @Override
     94         protected void onDraw(Canvas canvas) {
     95             super.onDraw(canvas);
     96 
     97             canvas.drawText(TEXT, 30.0f, 30.0f, mPaint);
     98             mPaint.setTextAlign(Paint.Align.CENTER);
     99             canvas.drawText(TEXT, 30.0f, 50.0f, mPaint);
    100             mPaint.setTextAlign(Paint.Align.RIGHT);
    101             canvas.drawText(TEXT, 30.0f, 70.0f, mPaint);
    102 
    103             canvas.save();
    104             canvas.translate(400.0f, 0.0f);
    105             canvas.scale(3.0f, 3.0f);
    106             mPaint.setTextAlign(Paint.Align.LEFT);
    107             mPaint.setStrikeThruText(true);
    108             canvas.drawText(TEXT, 30.0f, 30.0f, mPaint);
    109             mPaint.setStrikeThruText(false);
    110             mPaint.setTextAlign(Paint.Align.CENTER);
    111             canvas.drawText(TEXT, 30.0f, 50.0f, mPaint);
    112             mPaint.setTextAlign(Paint.Align.RIGHT);
    113             canvas.drawText(TEXT, 30.0f, 70.0f, mPaint);
    114             canvas.restore();
    115 
    116             mPaint.setTextAlign(Paint.Align.LEFT);
    117             canvas.translate(0.0f, 100.0f);
    118 
    119             canvas.save();
    120             canvas.scale(mScale, mScale);
    121             canvas.drawText(TEXT, 30.0f, 30.0f, mPaint);
    122             canvas.restore();
    123 
    124             canvas.translate(0.0f, 250.0f);
    125             canvas.save();
    126             canvas.scale(3.0f, 3.0f);
    127             canvas.drawText(TEXT, 30.0f, 30.0f, mShadowPaint);
    128             canvas.translate(100.0f, 0.0f);
    129 //            canvas.drawTextOnPath(TEXT + TEXT + TEXT, mPath, 0.0f, 0.0f, mPaint);
    130             canvas.restore();
    131 
    132             float width = mPaint.measureText(TEXT);
    133 
    134             canvas.translate(500.0f, 0.0f);
    135             canvas.rotate(45.0f, width * 3.0f / 2.0f, 0.0f);
    136             canvas.scale(3.0f, 3.0f);
    137             canvas.drawText(TEXT, 30.0f, 30.0f, mPaint);
    138         }
    139     }
    140 }
    141