SearchOrbView.java revision 2fb330f7a11a5c87d4ea8b19a97a99f65b81b42e 
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.content.res.TypedArray;
23import android.graphics.Color;
24import android.graphics.Rect;
25import android.graphics.drawable.Drawable;
26import android.graphics.drawable.GradientDrawable;
27import android.support.v17.leanback.R;
28import android.util.AttributeSet;
29import android.view.LayoutInflater;
30import android.view.View;
31import android.widget.FrameLayout;
32import android.widget.ImageView;
33
34public class SearchOrbView extends FrameLayout implements View.OnClickListener {
35    private OnClickListener mListener;
36    private View mSearchOrbView;
37    private int mSearchOrbColor, mSearchOrbColorBright;
38    private final float mFocusedZoom;
39    private final float mBrightnessAlpha;
40    private final int mPulseDurationMs;
41    private final int mScaleDownDurationMs;
42    private ValueAnimator mColorAnimator;
43
44    private final ArgbEvaluator mColorEvaluator = new ArgbEvaluator();
45
46    private final ValueAnimator.AnimatorUpdateListener mUpdateListener =
47            new ValueAnimator.AnimatorUpdateListener() {
48        @Override
49        public void onAnimationUpdate(ValueAnimator animator) {
50            Integer color = (Integer) animator.getAnimatedValue();
51            setOrbViewColor(color.intValue());
52        }
53    };
54
55    public SearchOrbView(Context context) {
56        this(context, null);
57    }
58
59    public SearchOrbView(Context context, AttributeSet attrs) {
60        this(context, attrs, R.style.Widget_Leanback_SearchOrbViewStyle);
61    }
62
63    public SearchOrbView(Context context, AttributeSet attrs, int defStyle) {
64        super(context, attrs, defStyle);
65
66        LayoutInflater inflater = (LayoutInflater) context
67                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
68        View root = inflater.inflate(R.layout.lb_search_orb, this, true);
69        mSearchOrbView = root.findViewById(R.id.search_orb);
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        ImageView icon = (ImageView)root.findViewById(R.id.icon);
81        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.lbSearchOrbView, 0,
82                defStyle);
83        Drawable img = a.getDrawable(R.styleable.lbSearchOrbView_searchOrbIcon);
84        icon.setImageDrawable(img);
85
86        int color = a.getColor(R.styleable.lbSearchOrbView_searchOrbColor, 0);
87        setOrbColor(color);
88        a.recycle();
89
90        setFocusable(true);
91        setClipChildren(false);
92        setOnClickListener(this);
93    }
94
95    @Override
96    public void onClick(View view) {
97        if (null != mListener) {
98            mListener.onClick(view);
99        }
100    }
101
102    @Override
103    protected void onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) {
104        super.onFocusChanged(gainFocus, direction, previouslyFocusedRect);
105        final float zoom = gainFocus ? mFocusedZoom : 1f;
106        final int duration = gainFocus ? mPulseDurationMs : mScaleDownDurationMs;
107        mSearchOrbView.animate().scaleX(zoom).scaleY(zoom).setDuration(duration).start();
108        enableOrbColorAnimation(gainFocus);
109    }
110
111    private void enableOrbColorAnimation(boolean enable) {
112        if (mColorAnimator != null) {
113            mColorAnimator.end();
114            mColorAnimator = null;
115        }
116        if (enable) {
117            // TODO: set interpolator (material if available)
118            mColorAnimator = ValueAnimator.ofObject(mColorEvaluator,
119                    mSearchOrbColor, mSearchOrbColorBright, mSearchOrbColor);
120            mColorAnimator.setRepeatCount(ValueAnimator.INFINITE);
121            mColorAnimator.setDuration(mPulseDurationMs * 2);
122            mColorAnimator.addUpdateListener(mUpdateListener);
123            mColorAnimator.start();
124        }
125    }
126
127    private void setOrbViewColor(int color) {
128        if (mSearchOrbView.getBackground() instanceof GradientDrawable) {
129            ((GradientDrawable) mSearchOrbView.getBackground()).setColor(color);
130        }
131    }
132
133    /**
134     * Set the on click listener for the orb
135     * @param listener The listener.
136     */
137    public void setOnOrbClickedListener(OnClickListener listener) {
138        mListener = listener;
139        if (null != listener) {
140            setVisibility(View.VISIBLE);
141        } else {
142            setVisibility(View.INVISIBLE);
143        }
144    }
145
146    private int getBrightColor(int color) {
147        final float brightnessValue = 0xff * mBrightnessAlpha;
148        int red = (int)(Color.red(color) * (1 - mBrightnessAlpha) + brightnessValue);
149        int green = (int)(Color.green(color) * (1 - mBrightnessAlpha) + brightnessValue);
150        int blue = (int)(Color.blue(color) * (1 - mBrightnessAlpha) + brightnessValue);
151        int alpha = (int)(Color.alpha(color) * (1 - mBrightnessAlpha) + brightnessValue);
152        return Color.argb(alpha, red, green, blue);
153    }
154
155    public void setOrbColor(int color) {
156        mSearchOrbColor = color;
157        mSearchOrbColorBright = getBrightColor(color);
158
159        if (mColorAnimator == null) {
160            setOrbViewColor(color);
161        } else {
162            enableOrbColorAnimation(true);
163        }
164    }
165
166    public int getOrbColor() {
167        return mSearchOrbColor;
168    }
169}
170