1/*
2 * Copyright (C) 2006 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 com.android.deskclock;
18
19import android.content.Context;
20import android.content.Intent;
21import android.content.IntentFilter;
22import android.content.BroadcastReceiver;
23import android.content.res.Resources;
24import android.content.res.TypedArray;
25import android.graphics.Canvas;
26import android.graphics.Color;
27import android.graphics.Paint;
28import android.graphics.drawable.Drawable;
29import android.os.Handler;
30import android.text.format.DateUtils;
31import android.text.format.Time;
32import android.util.AttributeSet;
33import android.view.View;
34import android.widget.RemoteViews.RemoteView;
35
36import java.util.TimeZone;
37
38/**
39 * This widget display an analogic clock with two hands for hours and
40 * minutes.
41 */
42public class AnalogClock extends View {
43    private Time mCalendar;
44
45    private final Drawable mHourHand;
46    private final Drawable mMinuteHand;
47    private final Drawable mSecondHand;
48    private final Drawable mDial;
49
50    private final int mDialWidth;
51    private final int mDialHeight;
52
53    private boolean mAttached;
54
55    private final Handler mHandler = new Handler();
56    private float mSeconds;
57    private float mMinutes;
58    private float mHour;
59    private boolean mChanged;
60    private final Context mContext;
61    private String mTimeZoneId;
62    private boolean mNoSeconds = false;
63
64    private final float mDotRadius;
65    private final float mDotOffset;
66    private Paint mDotPaint;
67
68    public AnalogClock(Context context) {
69        this(context, null);
70    }
71
72    public AnalogClock(Context context, AttributeSet attrs) {
73        this(context, attrs, 0);
74    }
75
76    public AnalogClock(Context context, AttributeSet attrs,
77                       int defStyle) {
78        super(context, attrs, defStyle);
79        mContext = context;
80        Resources r = mContext.getResources();
81
82        mDial = r.getDrawable(R.drawable.clock_analog_dial_mipmap);
83        mHourHand = r.getDrawable(R.drawable.clock_analog_hour_mipmap);
84        mMinuteHand = r.getDrawable(R.drawable.clock_analog_minute_mipmap);
85        mSecondHand = r.getDrawable(R.drawable.clock_analog_second_mipmap);
86
87        TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.AnalogClock);
88        mDotRadius = a.getDimension(R.styleable.AnalogClock_jewelRadius, 0);
89        mDotOffset = a.getDimension(R.styleable.AnalogClock_jewelOffset, 0);
90        final int dotColor = a.getColor(R.styleable.AnalogClock_jewelColor, Color.WHITE);
91        if (dotColor != 0) {
92            mDotPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
93            mDotPaint.setColor(dotColor);
94        }
95
96        mCalendar = new Time();
97
98        mDialWidth = mDial.getIntrinsicWidth();
99        mDialHeight = mDial.getIntrinsicHeight();
100    }
101
102    @Override
103    protected void onAttachedToWindow() {
104        super.onAttachedToWindow();
105
106        if (!mAttached) {
107            mAttached = true;
108            IntentFilter filter = new IntentFilter();
109
110            filter.addAction(Intent.ACTION_TIME_TICK);
111            filter.addAction(Intent.ACTION_TIME_CHANGED);
112            filter.addAction(Intent.ACTION_TIMEZONE_CHANGED);
113
114            getContext().registerReceiver(mIntentReceiver, filter, null, mHandler);
115        }
116
117        // NOTE: It's safe to do these after registering the receiver since the receiver always runs
118        // in the main thread, therefore the receiver can't run before this method returns.
119
120        // The time zone may have changed while the receiver wasn't registered, so update the Time
121        mCalendar = new Time();
122
123        // Make sure we update to the current time
124        onTimeChanged();
125
126        // tick the seconds
127        post(mClockTick);
128
129    }
130
131    @Override
132    protected void onDetachedFromWindow() {
133        super.onDetachedFromWindow();
134        if (mAttached) {
135            getContext().unregisterReceiver(mIntentReceiver);
136            removeCallbacks(mClockTick);
137            mAttached = false;
138        }
139    }
140
141    @Override
142    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
143
144        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
145        int widthSize =  MeasureSpec.getSize(widthMeasureSpec);
146        int heightMode = MeasureSpec.getMode(heightMeasureSpec);
147        int heightSize =  MeasureSpec.getSize(heightMeasureSpec);
148
149        float hScale = 1.0f;
150        float vScale = 1.0f;
151
152        if (widthMode != MeasureSpec.UNSPECIFIED && widthSize < mDialWidth) {
153            hScale = (float) widthSize / (float) mDialWidth;
154        }
155
156        if (heightMode != MeasureSpec.UNSPECIFIED && heightSize < mDialHeight) {
157            vScale = (float )heightSize / (float) mDialHeight;
158        }
159
160        float scale = Math.min(hScale, vScale);
161
162        setMeasuredDimension(resolveSizeAndState((int) (mDialWidth * scale), widthMeasureSpec, 0),
163                resolveSizeAndState((int) (mDialHeight * scale), heightMeasureSpec, 0));
164    }
165
166    @Override
167    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
168        super.onSizeChanged(w, h, oldw, oldh);
169        mChanged = true;
170    }
171
172    @Override
173    protected void onDraw(Canvas canvas) {
174        super.onDraw(canvas);
175
176        boolean changed = mChanged;
177        if (changed) {
178            mChanged = false;
179        }
180
181        int availableWidth = getWidth();
182        int availableHeight = getHeight();
183
184        int x = availableWidth / 2;
185        int y = availableHeight / 2;
186
187        final Drawable dial = mDial;
188        int w = dial.getIntrinsicWidth();
189        int h = dial.getIntrinsicHeight();
190
191        boolean scaled = false;
192
193        if (availableWidth < w || availableHeight < h) {
194            scaled = true;
195            float scale = Math.min((float) availableWidth / (float) w,
196                                   (float) availableHeight / (float) h);
197            canvas.save();
198            canvas.scale(scale, scale, x, y);
199        }
200
201        if (changed) {
202            dial.setBounds(x - (w / 2), y - (h / 2), x + (w / 2), y + (h / 2));
203        }
204        dial.draw(canvas);
205
206        if (mDotRadius > 0f && mDotPaint != null) {
207            canvas.drawCircle(x, y - (h / 2) + mDotOffset, mDotRadius, mDotPaint);
208        }
209
210        drawHand(canvas, mHourHand, x, y, mHour / 12.0f * 360.0f, changed);
211        drawHand(canvas, mMinuteHand, x, y, mMinutes / 60.0f * 360.0f, changed);
212        if (!mNoSeconds) {
213            drawHand(canvas, mSecondHand, x, y, mSeconds / 60.0f * 360.0f, changed);
214        }
215
216        if (scaled) {
217            canvas.restore();
218        }
219    }
220
221    private void drawHand(Canvas canvas, Drawable hand, int x, int y, float angle,
222          boolean changed) {
223      canvas.save();
224      canvas.rotate(angle, x, y);
225      if (changed) {
226          final int w = hand.getIntrinsicWidth();
227          final int h = hand.getIntrinsicHeight();
228          hand.setBounds(x - (w / 2), y - (h / 2), x + (w / 2), y + (h / 2));
229      }
230      hand.draw(canvas);
231      canvas.restore();
232    }
233
234    private void onTimeChanged() {
235        mCalendar.setToNow();
236
237        if (mTimeZoneId != null) {
238            mCalendar.switchTimezone(mTimeZoneId);
239        }
240
241        int hour = mCalendar.hour;
242        int minute = mCalendar.minute;
243        int second = mCalendar.second;
244  //      long millis = System.currentTimeMillis() % 1000;
245
246        mSeconds = second;//(float) ((second * 1000 + millis) / 166.666);
247        mMinutes = minute + second / 60.0f;
248        mHour = hour + mMinutes / 60.0f;
249        mChanged = true;
250
251        updateContentDescription(mCalendar);
252    }
253
254    private final BroadcastReceiver mIntentReceiver = new BroadcastReceiver() {
255        @Override
256        public void onReceive(Context context, Intent intent) {
257            if (intent.getAction().equals(Intent.ACTION_TIMEZONE_CHANGED)) {
258                String tz = intent.getStringExtra("time-zone");
259                mCalendar = new Time(TimeZone.getTimeZone(tz).getID());
260            }
261            onTimeChanged();
262            invalidate();
263        }
264    };
265
266    private final Runnable mClockTick = new Runnable () {
267
268        @Override
269        public void run() {
270            onTimeChanged();
271            invalidate();
272            AnalogClock.this.postDelayed(mClockTick, 1000);
273        }
274    };
275
276    private void updateContentDescription(Time time) {
277        final int flags = DateUtils.FORMAT_SHOW_TIME | DateUtils.FORMAT_24HOUR;
278        String contentDescription = DateUtils.formatDateTime(mContext,
279                time.toMillis(false), flags);
280        setContentDescription(contentDescription);
281    }
282
283    public void setTimeZone(String id) {
284        mTimeZoneId = id;
285        onTimeChanged();
286    }
287
288    public void enableSeconds(boolean enable) {
289        mNoSeconds = !enable;
290    }
291
292}
293
294