Home | History | Annotate | Download | only in hwui 
      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.app.Activity;
     20 import android.content.Context;
     21 import android.graphics.Canvas;
     22 import android.graphics.Matrix;
     23 import android.graphics.Paint;
     24 import android.graphics.RadialGradient;
     25 import android.graphics.Shader;
     26 import android.graphics.SweepGradient;
     27 import android.os.Bundle;
     28 import android.view.View;
     29 
     30 @SuppressWarnings({"UnusedDeclaration"})
     31 public class AdvancedGradientsActivity extends Activity {
     32     @Override
     33     protected void onCreate(Bundle savedInstanceState) {
     34         super.onCreate(savedInstanceState);
     35 
     36         setContentView(new GradientsView(this));
     37     }
     38 
     39     public static class GradientsView extends View {
     40         private final Paint mPaint;
     41         private final SweepGradient mSweepGradient;
     42         private final RadialGradient mRadialGradient;
     43         private final Matrix mMatrix;
     44         private final Matrix mMatrix2;
     45         private final Matrix mMatrix3;
     46 
     47         public GradientsView(Context c) {
     48             super(c);
     49 
     50             mSweepGradient = new SweepGradient(0.0f, 0.0f, 0xff000000, 0xffffffff);
     51             mRadialGradient = new RadialGradient(0.0f, 0.0f, 100.0f, 0xff000000, 0xffffffff,
     52                     Shader.TileMode.MIRROR);
     53 
     54             mMatrix = new Matrix();
     55             mMatrix.setRotate(-45, 0.0f, 0.0f);
     56             mMatrix.postTranslate(100.0f, 100.0f);
     57 
     58             mMatrix2 = new Matrix();
     59             mMatrix2.setScale(1.0f, 2.0f);
     60             mMatrix2.postRotate(-45, 0.0f, 0.0f);
     61 
     62             mMatrix3 = new Matrix();
     63             mMatrix3.setTranslate(100.0f, 100.0f);
     64 
     65             mPaint = new Paint();
     66         }
     67 
     68         @Override
     69         protected void onDraw(Canvas canvas) {
     70             super.onDraw(canvas);
     71             canvas.drawRGB(255, 255, 255);
     72 
     73             canvas.save();
     74             canvas.translate(130.0f, 100.0f);
     75 
     76             mSweepGradient.setLocalMatrix(mMatrix3);
     77             mPaint.setShader(mSweepGradient);
     78             canvas.drawRect(0.0f, 0.0f, 200.0f, 200.0f, mPaint);
     79 
     80             canvas.translate(400.0f, 000.0f);
     81 
     82             mSweepGradient.setLocalMatrix(mMatrix);
     83             mPaint.setShader(mSweepGradient);
     84             canvas.drawRect(0.0f, 0.0f, 200.0f, 200.0f, mPaint);
     85 
     86             canvas.translate(400.0f, 000.0f);
     87 
     88             mSweepGradient.setLocalMatrix(mMatrix2);
     89             mPaint.setShader(mSweepGradient);
     90             canvas.drawRect(0.0f, 0.0f, 200.0f, 200.0f, mPaint);
     91 
     92             canvas.translate(-800.0f, 300.0f);
     93 
     94             mRadialGradient.setLocalMatrix(null);
     95             mPaint.setShader(mRadialGradient);
     96             canvas.drawRect(0.0f, 0.0f, 200.0f, 200.0f, mPaint);
     97 
     98             canvas.translate(400.0f, 000.0f);
     99 
    100             mRadialGradient.setLocalMatrix(mMatrix);
    101             mPaint.setShader(mRadialGradient);
    102             canvas.drawRect(0.0f, 0.0f, 200.0f, 200.0f, mPaint);
    103 
    104             canvas.translate(400.0f, 000.0f);
    105 
    106             mRadialGradient.setLocalMatrix(mMatrix2);
    107             mPaint.setShader(mRadialGradient);
    108             canvas.drawRect(0.0f, 0.0f, 200.0f, 200.0f, mPaint);
    109 
    110 
    111             canvas.restore();
    112         }
    113     }
    114 }
    115