SearchOrbView.java revision 5a59bde085588f95dc067bd1ed64a940f355343c 
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.Resources;
23import android.content.res.TypedArray;
24import android.graphics.Color;
25import android.graphics.Rect;
26import android.graphics.drawable.Drawable;
27import android.graphics.drawable.GradientDrawable;
28import android.support.v17.leanback.R;
29import android.util.AttributeSet;
30import android.view.LayoutInflater;
31import android.view.View;
32import android.widget.FrameLayout;
33import android.widget.ImageView;
34
35/**
36 * <p>A widget that draws a search affordance, represented by a round background and an icon.</p>
37 *
38 * Background color and icon can be customized
39 */
40public class SearchOrbView extends FrameLayout implements View.OnClickListener {
41    private OnClickListener mListener;
42    private View mSearchOrbView;
43    private ImageView mIcon;
44    private Drawable mIconDrawable;
45    private int mSearchOrbColor, mSearchOrbColorBright;
46    private final float mFocusedZoom;
47    private final float mBrightnessAlpha;
48    private final int mPulseDurationMs;
49    private final int mScaleDownDurationMs;
50    private ValueAnimator mColorAnimator;
51
52    private final ArgbEvaluator mColorEvaluator = new ArgbEvaluator();
53
54    private final ValueAnimator.AnimatorUpdateListener mUpdateListener =
55            new ValueAnimator.AnimatorUpdateListener() {
56        @Override
57        public void onAnimationUpdate(ValueAnimator animator) {
58            Integer color = (Integer) animator.getAnimatedValue();
59            setOrbViewColor(color.intValue());
60        }
61    };
62
63    public SearchOrbView(Context context) {
64        this(context, null);
65    }
66
67    public SearchOrbView(Context context, AttributeSet attrs) {
68        this(context, attrs, R.attr.searchOrbViewStyle);
69    }
70
71    public SearchOrbView(Context context, AttributeSet attrs, int defStyleAttr) {
72        super(context, attrs, defStyleAttr);
73
74        final Resources res = context.getResources();
75
76        LayoutInflater inflater = (LayoutInflater) context
77                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
78        View root = inflater.inflate(R.layout.lb_search_orb, this, true);
79        mSearchOrbView = root.findViewById(R.id.search_orb);
80        mIcon = (ImageView)root.findViewById(R.id.icon);
81
82        mFocusedZoom = context.getResources().getFraction(
83                R.fraction.lb_search_orb_focused_zoom, 1, 1);
84        mBrightnessAlpha = context.getResources().getFraction(
85                R.fraction.lb_search_orb_brightness_alpha, 1, 1);
86        mPulseDurationMs = context.getResources().getInteger(
87                R.integer.lb_search_orb_pulse_duration_ms);
88        mScaleDownDurationMs = context.getResources().getInteger(
89                R.integer.lb_search_orb_scale_down_duration_ms);
90
91        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.lbSearchOrbView,
92                defStyleAttr, 0);
93
94        Drawable img = a.getDrawable(R.styleable.lbSearchOrbView_searchOrbIcon);
95        if (img == null) {
96            img = res.getDrawable(R.drawable.lb_ic_in_app_search);
97        }
98        setOrbIcon(img);
99
100        int defColor = res.getColor(R.color.lb_default_search_color);
101        int color = a.getColor(R.styleable.lbSearchOrbView_searchOrbColor, defColor);
102        int brightColor = a.getColor(
103                R.styleable.lbSearchOrbView_searchOrbBrightColor, getBrightColor(color));
104        setOrbColor(color, brightColor);
105        a.recycle();
106
107        setFocusable(true);
108        setClipChildren(false);
109        setOnClickListener(this);
110    }
111
112    @Override
113    public void onClick(View view) {
114        if (null != mListener) {
115            mListener.onClick(view);
116        }
117    }
118
119    @Override
120    protected void onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) {
121        super.onFocusChanged(gainFocus, direction, previouslyFocusedRect);
122        final float zoom = gainFocus ? mFocusedZoom : 1f;
123        final int duration = gainFocus ? mPulseDurationMs : mScaleDownDurationMs;
124        mSearchOrbView.animate().scaleX(zoom).scaleY(zoom).setDuration(duration).start();
125        enableOrbColorAnimation(gainFocus);
126    }
127
128    /**
129     * Set the orb icon
130     * @param icon the drawable to be used as the icon
131     */
132    public void setOrbIcon(Drawable icon) {
133        mIconDrawable = icon;
134        mIcon.setImageDrawable(mIconDrawable);
135    }
136
137    /**
138     * Returns the orb icon
139     * @return the drawable used as the icon
140     */
141    public Drawable getOrbIcon() {
142        return mIconDrawable;
143    }
144
145    /**
146     * Set the on click listener for the orb
147     * @param listener The listener.
148     */
149    public void setOnOrbClickedListener(OnClickListener listener) {
150        mListener = listener;
151        if (null != listener) {
152            setVisibility(View.VISIBLE);
153        } else {
154            setVisibility(View.INVISIBLE);
155        }
156    }
157
158    /**
159     * Set the background color of the search orb.
160     * @param color the RGBA color
161     */
162    public void setOrbColor(int color) {
163        setOrbColor(color, getBrightColor(color));
164    }
165
166    public void setOrbColor(int color, int brightColor) {
167        mSearchOrbColor = color;
168        mSearchOrbColorBright = brightColor;
169
170        if (mColorAnimator == null) {
171            setOrbViewColor(color);
172        } else {
173            enableOrbColorAnimation(true);
174        }
175    }
176
177    /**
178     * Returns the orb color
179     * @return the RGBA color
180     */
181    public int getOrbColor() {
182        return mSearchOrbColor;
183    }
184
185    private int getBrightColor(int color) {
186        final float brightnessValue = 0xff * mBrightnessAlpha;
187        int red = (int)(Color.red(color) * (1 - mBrightnessAlpha) + brightnessValue);
188        int green = (int)(Color.green(color) * (1 - mBrightnessAlpha) + brightnessValue);
189        int blue = (int)(Color.blue(color) * (1 - mBrightnessAlpha) + brightnessValue);
190        int alpha = (int)(Color.alpha(color) * (1 - mBrightnessAlpha) + brightnessValue);
191        return Color.argb(alpha, red, green, blue);
192    }
193
194    private void enableOrbColorAnimation(boolean enable) {
195        if (mColorAnimator != null) {
196            mColorAnimator.end();
197            mColorAnimator = null;
198        }
199        if (enable) {
200            // TODO: set interpolator (material if available)
201            mColorAnimator = ValueAnimator.ofObject(mColorEvaluator,
202                    mSearchOrbColor, mSearchOrbColorBright, mSearchOrbColor);
203            mColorAnimator.setRepeatCount(ValueAnimator.INFINITE);
204            mColorAnimator.setDuration(mPulseDurationMs * 2);
205            mColorAnimator.addUpdateListener(mUpdateListener);
206            mColorAnimator.start();
207        }
208    }
209
210    private void setOrbViewColor(int color) {
211        if (mSearchOrbView.getBackground() instanceof GradientDrawable) {
212            ((GradientDrawable) mSearchOrbView.getBackground()).setColor(color);
213        }
214    }
215
216}
217