SearchOrbView.java revision f0e71182c62bba18e9d8098941a29c4f5031ce36 
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        ImageView icon = (ImageView)root.findViewById(R.id.icon);
72        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.lbSearchOrbView, 0,
73                defStyle);
74        Drawable img = a.getDrawable(R.styleable.lbSearchOrbView_searchOrbIcon);
75        icon.setImageDrawable(img);
76
77        int color = a.getColor(R.styleable.lbSearchOrbView_searchOrbColor, 0);
78        setOrbColor(color);
79        a.recycle();
80
81        setFocusable(true);
82        setClipChildren(false);
83
84        mFocusedZoom = context.getResources().getFraction(
85                R.fraction.lb_search_orb_focused_zoom, 1, 1);
86        mBrightnessAlpha = context.getResources().getFraction(
87                R.fraction.lb_search_orb_brightness_alpha, 1, 1);
88        mPulseDurationMs = context.getResources().getInteger(
89                R.integer.lb_search_orb_pulse_duration_ms);
90        mScaleDownDurationMs = context.getResources().getInteger(
91                R.integer.lb_search_orb_scale_down_duration_ms);
92
93        setOnClickListener(this);
94    }
95
96    @Override
97    public void onClick(View view) {
98        if (null != mListener) {
99            mListener.onClick(view);
100        }
101    }
102
103    @Override
104    protected void onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) {
105        super.onFocusChanged(gainFocus, direction, previouslyFocusedRect);
106        final float zoom = gainFocus ? mFocusedZoom : 1f;
107        final int duration = gainFocus ? mPulseDurationMs : mScaleDownDurationMs;
108        mSearchOrbView.animate().scaleX(zoom).scaleY(zoom).setDuration(duration).start();
109        enableOrbColorAnimation(gainFocus);
110    }
111
112    private void enableOrbColorAnimation(boolean enable) {
113        if (mColorAnimator != null) {
114            mColorAnimator.end();
115            mColorAnimator = null;
116        }
117        if (enable) {
118            // TODO: set interpolator (quantum if available)
119            mColorAnimator = ValueAnimator.ofObject(mColorEvaluator,
120                    mSearchOrbColor, mSearchOrbColorBright, mSearchOrbColor);
121            mColorAnimator.setRepeatCount(ValueAnimator.INFINITE);
122            mColorAnimator.setDuration(mPulseDurationMs * 2);
123            mColorAnimator.addUpdateListener(mUpdateListener);
124            mColorAnimator.start();
125        }
126    }
127
128    private void setOrbViewColor(int color) {
129        if (mSearchOrbView.getBackground() instanceof GradientDrawable) {
130            ((GradientDrawable) mSearchOrbView.getBackground()).setColor(color);
131        }
132    }
133
134    /**
135     * Set the on click listener for the orb
136     * @param listener The listener.
137     */
138    public void setOnOrbClickedListener(OnClickListener listener) {
139        mListener = listener;
140        if (null != listener) {
141            setVisibility(View.VISIBLE);
142        } else {
143            setVisibility(View.INVISIBLE);
144        }
145    }
146
147    private int getBrightColor(int color) {
148        final float brightnessValue = 0xff * mBrightnessAlpha;
149        int red = (int)(Color.red(color) * (1 - mBrightnessAlpha) + brightnessValue);
150        int green = (int)(Color.green(color) * (1 - mBrightnessAlpha) + brightnessValue);
151        int blue = (int)(Color.blue(color) * (1 - mBrightnessAlpha) + brightnessValue);
152        int alpha = (int)(Color.alpha(color) * (1 - mBrightnessAlpha) + brightnessValue);
153        return Color.argb(alpha, red, green, blue);
154    }
155
156    public void setOrbColor(int color) {
157        mSearchOrbColor = color;
158        mSearchOrbColorBright = getBrightColor(color);
159
160        if (mColorAnimator == null) {
161            setOrbViewColor(color);
162        } else {
163            enableOrbColorAnimation(true);
164        }
165    }
166
167    public int getOrbColor() {
168        return mSearchOrbColor;
169    }
170}
171