SearchOrbView.java revision aadb8928f5920c758c1a385bbc8b8b128a60657c 
1/*
2 * Copyright (C) 2014 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 android.support.v17.leanback.widget;
18
19import android.animation.ArgbEvaluator;
20import android.animation.ValueAnimator;
21import android.content.Context;
22import android.graphics.Color;
23import android.graphics.Rect;
24import android.graphics.drawable.GradientDrawable;
25import android.support.v17.leanback.R;
26import android.util.AttributeSet;
27import android.view.LayoutInflater;
28import android.view.View;
29import android.widget.FrameLayout;
30
31public class SearchOrbView extends FrameLayout implements View.OnClickListener {
32    private OnClickListener mListener;
33    private View mSearchOrbView;
34    private int mSearchOrbColor, mSearchOrbColorBright;
35    private final float mFocusedZoom;
36    private final float mBrightnessAlpha;
37    private final int mPulseDurationMs;
38    private final int mScaleDownDurationMs;
39    private ValueAnimator mColorAnimator;
40
41    private final ArgbEvaluator mColorEvaluator = new ArgbEvaluator();
42
43    private final ValueAnimator.AnimatorUpdateListener mUpdateListener =
44            new ValueAnimator.AnimatorUpdateListener() {
45        @Override
46        public void onAnimationUpdate(ValueAnimator animator) {
47            Integer color = (Integer) animator.getAnimatedValue();
48            setOrbViewColor(color.intValue());
49        }
50    };
51
52    public SearchOrbView(Context context) {
53        this(context, null);
54    }
55
56    public SearchOrbView(Context context, AttributeSet attrs) {
57        this(context, attrs, 0);
58    }
59
60    public SearchOrbView(Context context, AttributeSet attrs, int defStyle) {
61        super(context, attrs, defStyle);
62
63        LayoutInflater inflater = (LayoutInflater) context
64                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
65        View root = inflater.inflate(R.layout.lb_search_orb, this, true);
66        mSearchOrbView = root.findViewById(R.id.search_orb);
67
68        // By default we are not visible
69        setVisibility(INVISIBLE);
70        setFocusable(true);
71        setClipChildren(false);
72
73        mFocusedZoom = context.getResources().getFraction(
74                R.fraction.lb_search_orb_focused_zoom, 1, 1);
75        mBrightnessAlpha = context.getResources().getFraction(
76                R.fraction.lb_search_orb_brightness_alpha, 1, 1);
77        mPulseDurationMs = context.getResources().getInteger(
78                R.integer.lb_search_orb_pulse_duration_ms);
79        mScaleDownDurationMs = context.getResources().getInteger(
80                R.integer.lb_search_orb_scale_down_duration_ms);
81
82        setOnClickListener(this);
83    }
84
85    @Override
86    public void onClick(View view) {
87        if (null != mListener) {
88            mListener.onClick(view);
89        }
90    }
91
92    @Override
93    protected void onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) {
94        super.onFocusChanged(gainFocus, direction, previouslyFocusedRect);
95        final float zoom = gainFocus ? mFocusedZoom : 1f;
96        final int duration = gainFocus ? mPulseDurationMs : mScaleDownDurationMs;
97        mSearchOrbView.animate().scaleX(zoom).scaleY(zoom).setDuration(duration).start();
98        enableOrbColorAnimation(gainFocus);
99    }
100
101    private void enableOrbColorAnimation(boolean enable) {
102        if (mColorAnimator != null) {
103            mColorAnimator.end();
104            mColorAnimator = null;
105        }
106        if (enable) {
107            // TODO: set interpolator (quantum if available)
108            mColorAnimator = ValueAnimator.ofObject(mColorEvaluator,
109                    mSearchOrbColor, mSearchOrbColorBright, mSearchOrbColor);
110            mColorAnimator.setRepeatCount(ValueAnimator.INFINITE);
111            mColorAnimator.setDuration(mPulseDurationMs * 2);
112            mColorAnimator.addUpdateListener(mUpdateListener);
113            mColorAnimator.start();
114        }
115    }
116
117    private void setOrbViewColor(int color) {
118        if (mSearchOrbView.getBackground() instanceof GradientDrawable) {
119            ((GradientDrawable) mSearchOrbView.getBackground()).setColor(color);
120        }
121    }
122
123    /**
124     * Set the on click listener for the orb
125     * @param listener The listener.
126     */
127    public void setOnOrbClickedListener(OnClickListener listener) {
128        mListener = listener;
129        if (null != listener) {
130            setVisibility(View.VISIBLE);
131        } else {
132            setVisibility(View.INVISIBLE);
133        }
134    }
135
136    private int getBrightColor(int color) {
137        final float brightnessValue = 0xff * mBrightnessAlpha;
138        int red = (int)(Color.red(color) * (1 - mBrightnessAlpha) + brightnessValue);
139        int green = (int)(Color.green(color) * (1 - mBrightnessAlpha) + brightnessValue);
140        int blue = (int)(Color.blue(color) * (1 - mBrightnessAlpha) + brightnessValue);
141        int alpha = (int)(Color.alpha(color) * (1 - mBrightnessAlpha) + brightnessValue);
142        return Color.argb(alpha, red, green, blue);
143    }
144
145    public void setOrbColor(int color) {
146        mSearchOrbColor = color;
147        mSearchOrbColorBright = getBrightColor(color);
148
149        if (mColorAnimator == null) {
150            setOrbViewColor(color);
151        } else {
152            enableOrbColorAnimation(true);
153        }
154    }
155}
156