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
17package com.android.test.hwui;
18
19import android.app.Activity;
20import android.content.Context;
21import android.graphics.Canvas;
22import android.graphics.Matrix;
23import android.graphics.Paint;
24import android.graphics.RadialGradient;
25import android.graphics.Shader;
26import android.graphics.SweepGradient;
27import android.os.Bundle;
28import android.view.View;
29
30@SuppressWarnings({"UnusedDeclaration"})
31public 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