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.test.hwui;
18
19import android.app.Activity;
20import android.graphics.Color;
21import android.os.Bundle;
22import android.view.View;
23import android.view.ViewGroup;
24import android.widget.LinearLayout;
25import android.widget.TextView;
26
27import java.util.ArrayList;
28
29public class ViewLayerInvalidationActivity extends Activity {
30
31    int currentColor = Color.WHITE;
32    boolean nestedLayersOn = false;
33    ArrayList<LinearLayout> linearLayouts = new ArrayList<LinearLayout>();
34    ArrayList<LinearLayout> topLayouts = new ArrayList<LinearLayout>();
35    ArrayList<TextView> textViews = new ArrayList<TextView>();
36    LinearLayout container = null;
37    boolean randomInvalidates = false;
38    TextView nestedStatusTV, invalidateStatusTV;
39    static final String NO_NESTING = "Nested Layer: NO   ";
40    static final String NESTING = "Nested Layers: YES   ";
41    static final String NO_INVALIDATING = "Random Invalidating: NO   ";
42    static final String INVALIDATING = "Random Invalidating: YES   ";
43    static final int TEXT_COLOR_INTERVAL = 400;
44    static final int INVALIDATING_INTERVAL = 1000;
45    static final int NESTING_INTERVAL = 2000;
46
47    @Override
48    public void onCreate(Bundle savedInstanceState) {
49        super.onCreate(savedInstanceState);
50        setContentView(R.layout.view_layer_invalidation);
51
52        container = (LinearLayout) findViewById(R.id.container);
53        final LinearLayout container1 = (LinearLayout) findViewById(R.id.container1);
54        final LinearLayout container2 = (LinearLayout) findViewById(R.id.container2);
55        final LinearLayout container3 = (LinearLayout) findViewById(R.id.container3);
56        nestedStatusTV = (TextView) findViewById(R.id.nestedStatus);
57        invalidateStatusTV = (TextView) findViewById(R.id.invalidateStatus);
58        final TextView tva = (TextView) findViewById(R.id.textviewa);
59
60        topLayouts.add(container1);
61        topLayouts.add(container2);
62        topLayouts.add(container3);
63
64        collectLinearLayouts(container);
65        collectTextViews(container);
66
67        nestedStatusTV.setText(NO_NESTING);
68        invalidateStatusTV.setText(NO_INVALIDATING);
69
70        tva.setLayerType(View.LAYER_TYPE_HARDWARE, null);
71        container1.setLayerType(View.LAYER_TYPE_HARDWARE, null);
72        container2.setLayerType(View.LAYER_TYPE_HARDWARE, null);
73        container3.setLayerType(View.LAYER_TYPE_HARDWARE, null);
74
75        container.postDelayed(textColorSetter, TEXT_COLOR_INTERVAL);
76        container.postDelayed(nestedLayerSetter, NESTING_INTERVAL);
77        container.postDelayed(randomInvalidatesSetter, INVALIDATING_INTERVAL);
78    }
79
80    private Runnable textColorSetter = new Runnable() {
81        @Override
82        public void run() {
83            currentColor = (currentColor == Color.WHITE) ? Color.RED : Color.WHITE;
84            for (TextView tv : textViews) {
85                tv.setTextColor(currentColor);
86            }
87            if (randomInvalidates) {
88                randomInvalidator(container);
89            }
90            container.postDelayed(textColorSetter, TEXT_COLOR_INTERVAL);
91        }
92    };
93
94    private Runnable randomInvalidatesSetter = new Runnable() {
95        @Override
96        public void run() {
97            randomInvalidates = !randomInvalidates;
98            invalidateStatusTV.setText(randomInvalidates ? INVALIDATING : NO_INVALIDATING);
99            container.postDelayed(randomInvalidatesSetter, INVALIDATING_INTERVAL);
100        }
101    };
102
103    private Runnable nestedLayerSetter = new Runnable() {
104        @Override
105        public void run() {
106            nestedLayersOn = !nestedLayersOn;
107            nestedStatusTV.setText(nestedLayersOn ? NESTING : NO_NESTING);
108            for (LinearLayout layout : linearLayouts) {
109                layout.setLayerType(nestedLayersOn ?
110                        View.LAYER_TYPE_HARDWARE : View.LAYER_TYPE_NONE, null);
111            }
112            if (!nestedLayersOn) {
113                for (LinearLayout layout : topLayouts) {
114                    layout.setLayerType(View.LAYER_TYPE_HARDWARE, null);
115                }
116            }
117            container.postDelayed(nestedLayerSetter, NESTING_INTERVAL);
118        }
119    };
120
121    /**
122     * Invalidates views based on random chance (50%). This is meant to test
123     * invalidating several items in the hierarchy at the same time, which can cause artifacts
124     * if our invalidation-propagation logic is not sound.
125     */
126    private void randomInvalidator(ViewGroup parent) {
127        for (int i = 0; i < parent.getChildCount(); ++i) {
128            View child = parent.getChildAt(i);
129            if (Math.random() < .5) {
130                child.invalidate();
131            }
132            if (child instanceof ViewGroup) {
133                randomInvalidator((ViewGroup) child);
134            }
135        }
136    }
137
138    private void collectLinearLayouts(View view) {
139        if (!(view instanceof LinearLayout)) {
140            return;
141        }
142        LinearLayout parent = (LinearLayout) view;
143        linearLayouts.add(parent);
144        for (int i = 0; i < parent.getChildCount(); ++i) {
145            collectLinearLayouts(parent.getChildAt(i));
146        }
147    }
148
149    private void collectTextViews(View view) {
150        if (view instanceof TextView) {
151            textViews.add((TextView) view);
152            return;
153        }
154        if (!(view instanceof ViewGroup)) {
155            return;
156        }
157        ViewGroup parent = (ViewGroup) view;
158        for (int i = 0; i < parent.getChildCount(); ++i) {
159            collectTextViews(parent.getChildAt(i));
160        }
161    }
162}
163