SearchOrbView.java revision 2ed0e8a36ac111a3661c56f5dbbe74cfe0696eee 
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        setFocusable(true);
69        setClipChildren(false);
70
71        mFocusedZoom = context.getResources().getFraction(
72                R.fraction.lb_search_orb_focused_zoom, 1, 1);
73        mBrightnessAlpha = context.getResources().getFraction(
74                R.fraction.lb_search_orb_brightness_alpha, 1, 1);
75        mPulseDurationMs = context.getResources().getInteger(
76                R.integer.lb_search_orb_pulse_duration_ms);
77        mScaleDownDurationMs = context.getResources().getInteger(
78                R.integer.lb_search_orb_scale_down_duration_ms);
79
80        setOnClickListener(this);
81    }
82
83    @Override
84    public void onClick(View view) {
85        if (null != mListener) {
86            mListener.onClick(view);
87        }
88    }
89
90    @Override
91    protected void onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) {
92        super.onFocusChanged(gainFocus, direction, previouslyFocusedRect);
93        final float zoom = gainFocus ? mFocusedZoom : 1f;
94        final int duration = gainFocus ? mPulseDurationMs : mScaleDownDurationMs;
95        mSearchOrbView.animate().scaleX(zoom).scaleY(zoom).setDuration(duration).start();
96        enableOrbColorAnimation(gainFocus);
97    }
98
99    private void enableOrbColorAnimation(boolean enable) {
100        if (mColorAnimator != null) {
101            mColorAnimator.end();
102            mColorAnimator = null;
103        }
104        if (enable) {
105            // TODO: set interpolator (quantum if available)
106            mColorAnimator = ValueAnimator.ofObject(mColorEvaluator,
107                    mSearchOrbColor, mSearchOrbColorBright, mSearchOrbColor);
108            mColorAnimator.setRepeatCount(ValueAnimator.INFINITE);
109            mColorAnimator.setDuration(mPulseDurationMs * 2);
110            mColorAnimator.addUpdateListener(mUpdateListener);
111            mColorAnimator.start();
112        }
113    }
114
115    private void setOrbViewColor(int color) {
116        if (mSearchOrbView.getBackground() instanceof GradientDrawable) {
117            ((GradientDrawable) mSearchOrbView.getBackground()).setColor(color);
118        }
119    }
120
121    /**
122     * Set the on click listener for the orb
123     * @param listener The listener.
124     */
125    public void setOnOrbClickedListener(OnClickListener listener) {
126        mListener = listener;
127        if (null != listener) {
128            setVisibility(View.VISIBLE);
129        } else {
130            setVisibility(View.INVISIBLE);
131        }
132    }
133
134    private int getBrightColor(int color) {
135        final float brightnessValue = 0xff * mBrightnessAlpha;
136        int red = (int)(Color.red(color) * (1 - mBrightnessAlpha) + brightnessValue);
137        int green = (int)(Color.green(color) * (1 - mBrightnessAlpha) + brightnessValue);
138        int blue = (int)(Color.blue(color) * (1 - mBrightnessAlpha) + brightnessValue);
139        int alpha = (int)(Color.alpha(color) * (1 - mBrightnessAlpha) + brightnessValue);
140        return Color.argb(alpha, red, green, blue);
141    }
142
143    public void setOrbColor(int color) {
144        mSearchOrbColor = color;
145        mSearchOrbColorBright = getBrightColor(color);
146
147        if (mColorAnimator == null) {
148            setOrbViewColor(color);
149        } else {
150            enableOrbColorAnimation(true);
151        }
152    }
153}
154