SearchOrbView.java revision 44f004b2612b04510a09a4c1e33f5a109582d669 
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 mRootView;
43    private View mSearchOrbView;
44    private ImageView mIcon;
45    private Drawable mIconDrawable;
46    private Colors mColors;
47    private final float mFocusedZoom;
48    private final int mPulseDurationMs;
49    private final int mScaleDurationMs;
50    private ValueAnimator mColorAnimator;
51
52    /**
53     * A set of colors used to display the search orb.
54     */
55    public static class Colors {
56        private static final float sBrightnessAlpha = 0.15f;
57
58        /**
59         * Constructs a color set using the given color for the search orb.
60         * Other colors are provided by the framework.
61         *
62         * @param color The main search orb color.
63         */
64        public Colors(int color) {
65            this(color, color);
66        }
67
68        /**
69         * Constructs a color set using the given colors for the search orb.
70         * Other colors are provided by the framework.
71         *
72         * @param color The main search orb color.
73         * @param brightColor A brighter version of the search orb used for animation.
74         */
75        public Colors(int color, int brightColor) {
76            this(color, brightColor, Color.TRANSPARENT);
77        }
78
79        /**
80         * Constructs a color set using the given colors.
81         *
82         * @param color The main search orb color.
83         * @param brightColor A brighter version of the search orb used for animation.
84         * @param iconColor A color used to tint the search orb icon.
85         */
86        public Colors(int color, int brightColor, int iconColor) {
87            this.color = color;
88            this.brightColor = brightColor == color ? getBrightColor(color) : brightColor;
89            this.iconColor = iconColor;
90        }
91
92        /**
93         * The main color of the search orb.
94         */
95        public int color;
96
97        /**
98         * A brighter version of the search orb used for animation.
99         */
100        public int brightColor;
101
102        /**
103         * A color used to tint the search orb icon.
104         */
105        public int iconColor;
106
107        /**
108         * Computes a default brighter version of the given color.
109         */
110        public static int getBrightColor(int color) {
111            final float brightnessValue = 0xff * sBrightnessAlpha;
112            int red = (int)(Color.red(color) * (1 - sBrightnessAlpha) + brightnessValue);
113            int green = (int)(Color.green(color) * (1 - sBrightnessAlpha) + brightnessValue);
114            int blue = (int)(Color.blue(color) * (1 - sBrightnessAlpha) + brightnessValue);
115            int alpha = (int)(Color.alpha(color) * (1 - sBrightnessAlpha) + brightnessValue);
116            return Color.argb(alpha, red, green, blue);
117        }
118    }
119
120    private final ArgbEvaluator mColorEvaluator = new ArgbEvaluator();
121
122    private final ValueAnimator.AnimatorUpdateListener mUpdateListener =
123            new ValueAnimator.AnimatorUpdateListener() {
124        @Override
125        public void onAnimationUpdate(ValueAnimator animator) {
126            Integer color = (Integer) animator.getAnimatedValue();
127            setOrbViewColor(color.intValue());
128        }
129    };
130
131    private ValueAnimator mShadowFocusAnimator;
132
133    private final ValueAnimator.AnimatorUpdateListener mFocusUpdateListener =
134            new ValueAnimator.AnimatorUpdateListener() {
135        @Override
136        public void onAnimationUpdate(ValueAnimator animation) {
137            ShadowHelper.getInstance().setZ(mSearchOrbView, animation.getAnimatedFraction());
138        }
139    };
140
141    public SearchOrbView(Context context) {
142        this(context, null);
143    }
144
145    public SearchOrbView(Context context, AttributeSet attrs) {
146        this(context, attrs, R.attr.searchOrbViewStyle);
147    }
148
149    public SearchOrbView(Context context, AttributeSet attrs, int defStyleAttr) {
150        super(context, attrs, defStyleAttr);
151
152        final Resources res = context.getResources();
153
154        LayoutInflater inflater = (LayoutInflater) context
155                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
156        mRootView = inflater.inflate(R.layout.lb_search_orb, this, true);
157        mSearchOrbView = mRootView.findViewById(R.id.search_orb);
158        mIcon = (ImageView) mRootView.findViewById(R.id.icon);
159
160        mFocusedZoom = context.getResources().getFraction(
161                R.fraction.lb_search_orb_focused_zoom, 1, 1);
162        mPulseDurationMs = context.getResources().getInteger(
163                R.integer.lb_search_orb_pulse_duration_ms);
164        mScaleDurationMs = context.getResources().getInteger(
165                R.integer.lb_search_orb_scale_duration_ms);
166
167        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.lbSearchOrbView,
168                defStyleAttr, 0);
169
170        Drawable img = a.getDrawable(R.styleable.lbSearchOrbView_searchOrbIcon);
171        if (img == null) {
172            img = res.getDrawable(R.drawable.lb_ic_in_app_search);
173        }
174        setOrbIcon(img);
175
176        int defColor = res.getColor(R.color.lb_default_search_color);
177        int color = a.getColor(R.styleable.lbSearchOrbView_searchOrbColor, defColor);
178        int brightColor = a.getColor(
179                R.styleable.lbSearchOrbView_searchOrbBrightColor, color);
180        int iconColor = a.getColor(R.styleable.lbSearchOrbView_searchOrbIconColor, Color.TRANSPARENT);
181        setOrbColors(new Colors(color, brightColor, iconColor));
182        a.recycle();
183
184        setFocusable(true);
185        setClipChildren(false);
186        setOnClickListener(this);
187
188        ShadowHelper.getInstance().setZ(mSearchOrbView, 0f);
189        // Icon has no background, but must be on top of the search orb view
190        ShadowHelper.getInstance().setZ(mIcon, 1f);
191    }
192
193    @Override
194    public void onClick(View view) {
195        if (null != mListener) {
196            mListener.onClick(view);
197        }
198    }
199
200    private void startShadowFocusAnimation(boolean gainFocus, int duration) {
201        if (mShadowFocusAnimator == null) {
202            mShadowFocusAnimator = ValueAnimator.ofFloat(0f, 1f);
203            mShadowFocusAnimator.addUpdateListener(mFocusUpdateListener);
204        }
205        if (gainFocus) {
206            mShadowFocusAnimator.start();
207        } else {
208            mShadowFocusAnimator.reverse();
209        }
210        mShadowFocusAnimator.setDuration(duration);
211    }
212
213    @Override
214    protected void onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) {
215        super.onFocusChanged(gainFocus, direction, previouslyFocusedRect);
216        final float zoom = gainFocus ? mFocusedZoom : 1f;
217        mRootView.animate().scaleX(zoom).scaleY(zoom).setDuration(mScaleDurationMs).start();
218        startShadowFocusAnimation(gainFocus, mScaleDurationMs);
219        enableOrbColorAnimation(gainFocus);
220    }
221
222    /**
223     * Set the orb icon
224     * @param icon the drawable to be used as the icon
225     */
226    public void setOrbIcon(Drawable icon) {
227        mIconDrawable = icon;
228        mIcon.setImageDrawable(mIconDrawable);
229    }
230
231    /**
232     * Returns the orb icon
233     * @return the drawable used as the icon
234     */
235    public Drawable getOrbIcon() {
236        return mIconDrawable;
237    }
238
239    /**
240     * Set the on click listener for the orb
241     * @param listener The listener.
242     */
243    public void setOnOrbClickedListener(OnClickListener listener) {
244        mListener = listener;
245        if (null != listener) {
246            setVisibility(View.VISIBLE);
247        } else {
248            setVisibility(View.INVISIBLE);
249        }
250    }
251
252    /**
253     * Sets the background color of the search orb.
254     * Other colors will be provided by the framework.
255     *
256     * @param color the RGBA color
257     */
258    public void setOrbColor(int color) {
259        setOrbColors(new Colors(color, color, Color.TRANSPARENT));
260    }
261
262    /**
263     * Sets the search orb colors.
264     * Other colors are provided by the framework.
265     * @deprecated Use {@link #setOrbColors(Colors)} instead.
266     */
267    @Deprecated
268    public void setOrbColor(int color, int brightColor) {
269        setOrbColors(new Colors(color, brightColor, Color.TRANSPARENT));
270    }
271
272    /**
273     * Returns the orb color
274     * @return the RGBA color
275     */
276    public int getOrbColor() {
277        return mColors.color;
278    }
279
280    /**
281     * Set the {@link Colors} used to display the search orb.
282     */
283    public void setOrbColors(Colors colors) {
284        mColors = colors;
285        mIcon.setColorFilter(mColors.iconColor);
286
287        if (mColorAnimator == null) {
288            setOrbViewColor(mColors.color);
289        } else {
290            enableOrbColorAnimation(true);
291        }
292    }
293
294    /**
295     * Returns the {@link Colors} used to display the search orb.
296     */
297    public Colors getOrbColors() {
298        return mColors;
299    }
300
301    private void enableOrbColorAnimation(boolean enable) {
302        if (mColorAnimator != null) {
303            mColorAnimator.end();
304            mColorAnimator = null;
305        }
306        if (enable) {
307            // TODO: set interpolator (material if available)
308            mColorAnimator = ValueAnimator.ofObject(mColorEvaluator,
309                    mColors.color, mColors.brightColor, mColors.color);
310            mColorAnimator.setRepeatCount(ValueAnimator.INFINITE);
311            mColorAnimator.setDuration(mPulseDurationMs * 2);
312            mColorAnimator.addUpdateListener(mUpdateListener);
313            mColorAnimator.start();
314        }
315    }
316
317    private void setOrbViewColor(int color) {
318        if (mSearchOrbView.getBackground() instanceof GradientDrawable) {
319            ((GradientDrawable) mSearchOrbView.getBackground()).setColor(color);
320        }
321    }
322
323}
324