src/com/android/deskclock/AnalogClock.java - platform/packages/apps/DeskClock - Git at Google

 /*
  * Copyright (C) 2006 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 package com.android.deskclock;

 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
 import android.content.BroadcastReceiver;
 import android.content.res.Resources;
 import android.content.res.TypedArray;
 import android.graphics.Canvas;
 import android.graphics.Color;
 import android.graphics.Paint;
 import android.graphics.drawable.Drawable;
 import android.os.Handler;
 import android.text.format.DateUtils;
 import android.text.format.Time;
 import android.util.AttributeSet;
 import android.view.View;
 import android.widget.RemoteViews.RemoteView;

 import java.util.TimeZone;

 /**
  * This widget display an analogic clock with two hands for hours and
  * minutes.
  */
 public class AnalogClock extends View {
     private Time mCalendar;

     private final Drawable mHourHand;
     private final Drawable mMinuteHand;
     private final Drawable mSecondHand;
     private final Drawable mDial;

     private final int mDialWidth;
     private final int mDialHeight;

     private boolean mAttached;

     private final Handler mHandler = new Handler();
     private float mSeconds;
     private float mMinutes;
     private float mHour;
     private boolean mChanged;
     private final Context mContext;
     private String mTimeZoneId;
     private boolean mNoSeconds = false;

     private final float mDotRadius;
     private final float mDotOffset;
     private Paint mDotPaint;

     public AnalogClock(Context context) {
         this(context, null);
     }

     public AnalogClock(Context context, AttributeSet attrs) {
         this(context, attrs, 0);
     }

     public AnalogClock(Context context, AttributeSet attrs,
                        int defStyle) {
         super(context, attrs, defStyle);
         mContext = context;
         Resources r = mContext.getResources();

         mDial = r.getDrawable(R.drawable.clock_analog_dial);
         mHourHand = r.getDrawable(R.drawable.clock_analog_hour);
         mMinuteHand = r.getDrawable(R.drawable.clock_analog_minute);
         mSecondHand = r.getDrawable(R.drawable.clock_analog_second);

         TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.AnalogClock);
         mDotRadius = a.getDimension(R.styleable.AnalogClock_jewelRadius, 0);
         mDotOffset = a.getDimension(R.styleable.AnalogClock_jewelOffset, 0);
         final int dotColor = a.getColor(R.styleable.AnalogClock_jewelColor, Color.WHITE);
         if (dotColor != 0) {
             mDotPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
             mDotPaint.setColor(dotColor);
         }

         mCalendar = new Time();

         mDialWidth = mDial.getIntrinsicWidth();
         mDialHeight = mDial.getIntrinsicHeight();
     }

     @Override
     protected void onAttachedToWindow() {
         super.onAttachedToWindow();

         if (!mAttached) {
             mAttached = true;
             IntentFilter filter = new IntentFilter();

             filter.addAction(Intent.ACTION_TIME_TICK);
             filter.addAction(Intent.ACTION_TIME_CHANGED);
             filter.addAction(Intent.ACTION_TIMEZONE_CHANGED);

             getContext().registerReceiver(mIntentReceiver, filter, null, mHandler);
         }

         // NOTE: It's safe to do these after registering the receiver since the receiver always runs
         // in the main thread, therefore the receiver can't run before this method returns.

         // The time zone may have changed while the receiver wasn't registered, so update the Time
         mCalendar = new Time();

         // Make sure we update to the current time
         onTimeChanged();

         // tick the seconds
         post(mClockTick);

     }

     @Override
     protected void onDetachedFromWindow() {
         super.onDetachedFromWindow();
         if (mAttached) {
             getContext().unregisterReceiver(mIntentReceiver);
             removeCallbacks(mClockTick);
             mAttached = false;
         }
     }

     @Override
     protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

         int widthMode = MeasureSpec.getMode(widthMeasureSpec);
         int widthSize =  MeasureSpec.getSize(widthMeasureSpec);
         int heightMode = MeasureSpec.getMode(heightMeasureSpec);
         int heightSize =  MeasureSpec.getSize(heightMeasureSpec);

         float hScale = 1.0f;
         float vScale = 1.0f;

         if (widthMode != MeasureSpec.UNSPECIFIED && widthSize < mDialWidth) {
             hScale = (float) widthSize / (float) mDialWidth;
         }

         if (heightMode != MeasureSpec.UNSPECIFIED && heightSize < mDialHeight) {
             vScale = (float )heightSize / (float) mDialHeight;
         }

         float scale = Math.min(hScale, vScale);

         setMeasuredDimension(resolveSizeAndState((int) (mDialWidth * scale), widthMeasureSpec, 0),
                 resolveSizeAndState((int) (mDialHeight * scale), heightMeasureSpec, 0));
     }

     @Override
     protected void onSizeChanged(int w, int h, int oldw, int oldh) {
         super.onSizeChanged(w, h, oldw, oldh);
         mChanged = true;
     }

     @Override
     protected void onDraw(Canvas canvas) {
         super.onDraw(canvas);

         boolean changed = mChanged;
         if (changed) {
             mChanged = false;
         }

         int availableWidth = getWidth();
         int availableHeight = getHeight();

         int x = availableWidth / 2;
         int y = availableHeight / 2;

         final Drawable dial = mDial;
         int w = dial.getIntrinsicWidth();
         int h = dial.getIntrinsicHeight();

         boolean scaled = false;

         if (availableWidth < w || availableHeight < h) {
             scaled = true;
             float scale = Math.min((float) availableWidth / (float) w,
                                    (float) availableHeight / (float) h);
             canvas.save();
             canvas.scale(scale, scale, x, y);
         }

         if (changed) {
             dial.setBounds(x - (w / 2), y - (h / 2), x + (w / 2), y + (h / 2));
         }
         dial.draw(canvas);

         if (mDotRadius > 0f && mDotPaint != null) {
             canvas.drawCircle(x, y - (h / 2) + mDotOffset, mDotRadius, mDotPaint);
         }

         drawHand(canvas, mHourHand, x, y, mHour / 12.0f * 360.0f, changed);
         drawHand(canvas, mMinuteHand, x, y, mMinutes / 60.0f * 360.0f, changed);
         if (!mNoSeconds) {
             drawHand(canvas, mSecondHand, x, y, mSeconds / 60.0f * 360.0f, changed);
         }

         if (scaled) {
             canvas.restore();
         }
     }

     private void drawHand(Canvas canvas, Drawable hand, int x, int y, float angle,
           boolean changed) {
       canvas.save();
       canvas.rotate(angle, x, y);
       if (changed) {
           final int w = hand.getIntrinsicWidth();
           final int h = hand.getIntrinsicHeight();
           hand.setBounds(x - (w / 2), y - (h / 2), x + (w / 2), y + (h / 2));
       }
       hand.draw(canvas);
       canvas.restore();
     }

     private void onTimeChanged() {
         mCalendar.setToNow();

         if (mTimeZoneId != null) {
             mCalendar.switchTimezone(mTimeZoneId);
         }

         int hour = mCalendar.hour;
         int minute = mCalendar.minute;
         int second = mCalendar.second;
   //      long millis = System.currentTimeMillis() % 1000;

         mSeconds = second;//(float) ((second * 1000 + millis) / 166.666);
         mMinutes = minute + second / 60.0f;
         mHour = hour + mMinutes / 60.0f;
         mChanged = true;

         updateContentDescription(mCalendar);
     }

     private final BroadcastReceiver mIntentReceiver = new BroadcastReceiver() {
         @Override
         public void onReceive(Context context, Intent intent) {
             if (intent.getAction().equals(Intent.ACTION_TIMEZONE_CHANGED)) {
                 String tz = intent.getStringExtra("time-zone");
                 mCalendar = new Time(TimeZone.getTimeZone(tz).getID());
             }
             onTimeChanged();
             invalidate();
         }
     };

     private final Runnable mClockTick = new Runnable () {

         @Override
         public void run() {
             onTimeChanged();
             invalidate();
             AnalogClock.this.postDelayed(mClockTick, 1000);
         }
     };

     private void updateContentDescription(Time time) {
         final int flags = DateUtils.FORMAT_SHOW_TIME | DateUtils.FORMAT_24HOUR;
         String contentDescription = DateUtils.formatDateTime(mContext,
                 time.toMillis(false), flags);
         setContentDescription(contentDescription);
     }

     public void setTimeZone(String id) {
         mTimeZoneId = id;
         onTimeChanged();
     }

     public void enableSeconds(boolean enable) {
         mNoSeconds = !enable;
     }

 }
	/*
	* Copyright (C) 2006 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	package com.android.deskclock;

	import android.content.Context;
	import android.content.Intent;
	import android.content.IntentFilter;
	import android.content.BroadcastReceiver;
	import android.content.res.Resources;
	import android.content.res.TypedArray;
	import android.graphics.Canvas;
	import android.graphics.Color;
	import android.graphics.Paint;
	import android.graphics.drawable.Drawable;
	import android.os.Handler;
	import android.text.format.DateUtils;
	import android.text.format.Time;
	import android.util.AttributeSet;
	import android.view.View;
	import android.widget.RemoteViews.RemoteView;

	import java.util.TimeZone;

	/**
	* This widget display an analogic clock with two hands for hours and
	* minutes.
	*/
	public class AnalogClock extends View {
	private Time mCalendar;

	private final Drawable mHourHand;
	private final Drawable mMinuteHand;
	private final Drawable mSecondHand;
	private final Drawable mDial;

	private final int mDialWidth;
	private final int mDialHeight;

	private boolean mAttached;

	private final Handler mHandler = new Handler();
	private float mSeconds;
	private float mMinutes;
	private float mHour;
	private boolean mChanged;
	private final Context mContext;
	private String mTimeZoneId;
	private boolean mNoSeconds = false;

	private final float mDotRadius;
	private final float mDotOffset;
	private Paint mDotPaint;

	public AnalogClock(Context context) {
	this(context, null);
	}

	public AnalogClock(Context context, AttributeSet attrs) {
	this(context, attrs, 0);
	}

	public AnalogClock(Context context, AttributeSet attrs,
	int defStyle) {
	super(context, attrs, defStyle);
	mContext = context;
	Resources r = mContext.getResources();

	mDial = r.getDrawable(R.drawable.clock_analog_dial);
	mHourHand = r.getDrawable(R.drawable.clock_analog_hour);
	mMinuteHand = r.getDrawable(R.drawable.clock_analog_minute);
	mSecondHand = r.getDrawable(R.drawable.clock_analog_second);

	TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.AnalogClock);
	mDotRadius = a.getDimension(R.styleable.AnalogClock_jewelRadius, 0);
	mDotOffset = a.getDimension(R.styleable.AnalogClock_jewelOffset, 0);
	final int dotColor = a.getColor(R.styleable.AnalogClock_jewelColor, Color.WHITE);
	if (dotColor != 0) {
	mDotPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
	mDotPaint.setColor(dotColor);
	}

	mCalendar = new Time();

	mDialWidth = mDial.getIntrinsicWidth();
	mDialHeight = mDial.getIntrinsicHeight();
	}

	@Override
	protected void onAttachedToWindow() {
	super.onAttachedToWindow();

	if (!mAttached) {
	mAttached = true;
	IntentFilter filter = new IntentFilter();

	filter.addAction(Intent.ACTION_TIME_TICK);
	filter.addAction(Intent.ACTION_TIME_CHANGED);
	filter.addAction(Intent.ACTION_TIMEZONE_CHANGED);

	getContext().registerReceiver(mIntentReceiver, filter, null, mHandler);
	}

	// NOTE: It's safe to do these after registering the receiver since the receiver always runs
	// in the main thread, therefore the receiver can't run before this method returns.

	// The time zone may have changed while the receiver wasn't registered, so update the Time
	mCalendar = new Time();

	// Make sure we update to the current time
	onTimeChanged();

	// tick the seconds
	post(mClockTick);

	}

	@Override
	protected void onDetachedFromWindow() {
	super.onDetachedFromWindow();
	if (mAttached) {
	getContext().unregisterReceiver(mIntentReceiver);
	removeCallbacks(mClockTick);
	mAttached = false;
	}
	}

	@Override
	protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

	int widthMode = MeasureSpec.getMode(widthMeasureSpec);
	int widthSize = MeasureSpec.getSize(widthMeasureSpec);
	int heightMode = MeasureSpec.getMode(heightMeasureSpec);
	int heightSize = MeasureSpec.getSize(heightMeasureSpec);

	float hScale = 1.0f;
	float vScale = 1.0f;

	if (widthMode != MeasureSpec.UNSPECIFIED && widthSize < mDialWidth) {
	hScale = (float) widthSize / (float) mDialWidth;
	}

	if (heightMode != MeasureSpec.UNSPECIFIED && heightSize < mDialHeight) {
	vScale = (float )heightSize / (float) mDialHeight;
	}

	float scale = Math.min(hScale, vScale);

	setMeasuredDimension(resolveSizeAndState((int) (mDialWidth * scale), widthMeasureSpec, 0),
	resolveSizeAndState((int) (mDialHeight * scale), heightMeasureSpec, 0));
	}

	@Override
	protected void onSizeChanged(int w, int h, int oldw, int oldh) {
	super.onSizeChanged(w, h, oldw, oldh);
	mChanged = true;
	}

	@Override
	protected void onDraw(Canvas canvas) {
	super.onDraw(canvas);

	boolean changed = mChanged;
	if (changed) {
	mChanged = false;
	}

	int availableWidth = getWidth();
	int availableHeight = getHeight();

	int x = availableWidth / 2;
	int y = availableHeight / 2;

	final Drawable dial = mDial;
	int w = dial.getIntrinsicWidth();
	int h = dial.getIntrinsicHeight();

	boolean scaled = false;

	if (availableWidth < w \|\| availableHeight < h) {
	scaled = true;
	float scale = Math.min((float) availableWidth / (float) w,
	(float) availableHeight / (float) h);
	canvas.save();
	canvas.scale(scale, scale, x, y);
	}

	if (changed) {
	dial.setBounds(x - (w / 2), y - (h / 2), x + (w / 2), y + (h / 2));
	}
	dial.draw(canvas);

	if (mDotRadius > 0f && mDotPaint != null) {
	canvas.drawCircle(x, y - (h / 2) + mDotOffset, mDotRadius, mDotPaint);
	}

	drawHand(canvas, mHourHand, x, y, mHour / 12.0f * 360.0f, changed);
	drawHand(canvas, mMinuteHand, x, y, mMinutes / 60.0f * 360.0f, changed);
	if (!mNoSeconds) {
	drawHand(canvas, mSecondHand, x, y, mSeconds / 60.0f * 360.0f, changed);
	}

	if (scaled) {
	canvas.restore();
	}
	}

	private void drawHand(Canvas canvas, Drawable hand, int x, int y, float angle,
	boolean changed) {
	canvas.save();
	canvas.rotate(angle, x, y);
	if (changed) {
	final int w = hand.getIntrinsicWidth();
	final int h = hand.getIntrinsicHeight();
	hand.setBounds(x - (w / 2), y - (h / 2), x + (w / 2), y + (h / 2));
	}
	hand.draw(canvas);
	canvas.restore();
	}

	private void onTimeChanged() {
	mCalendar.setToNow();

	if (mTimeZoneId != null) {
	mCalendar.switchTimezone(mTimeZoneId);
	}

	int hour = mCalendar.hour;
	int minute = mCalendar.minute;
	int second = mCalendar.second;
	// long millis = System.currentTimeMillis() % 1000;

	mSeconds = second;//(float) ((second * 1000 + millis) / 166.666);
	mMinutes = minute + second / 60.0f;
	mHour = hour + mMinutes / 60.0f;
	mChanged = true;

	updateContentDescription(mCalendar);
	}

	private final BroadcastReceiver mIntentReceiver = new BroadcastReceiver() {
	@Override
	public void onReceive(Context context, Intent intent) {
	if (intent.getAction().equals(Intent.ACTION_TIMEZONE_CHANGED)) {
	String tz = intent.getStringExtra("time-zone");
	mCalendar = new Time(TimeZone.getTimeZone(tz).getID());
	}
	onTimeChanged();
	invalidate();
	}
	};

	private final Runnable mClockTick = new Runnable () {

	@Override
	public void run() {
	onTimeChanged();
	invalidate();
	AnalogClock.this.postDelayed(mClockTick, 1000);
	}
	};

	private void updateContentDescription(Time time) {
	final int flags = DateUtils.FORMAT_SHOW_TIME \| DateUtils.FORMAT_24HOUR;
	String contentDescription = DateUtils.formatDateTime(mContext,
	time.toMillis(false), flags);
	setContentDescription(contentDescription);
	}

	public void setTimeZone(String id) {
	mTimeZoneId = id;
	onTimeChanged();
	}

	public void enableSeconds(boolean enable) {
	mNoSeconds = !enable;
	}

	}