src/com/android/settings/widget/ChartDataUsageView.java - LeafOS-Project/android_packages_apps_Settings - Gitiles

 /*
  * Copyright (C) 2011 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.settings.widget;

 import android.content.Context;
 import android.content.res.Resources;
 import android.net.NetworkPolicy;
 import android.net.NetworkStatsHistory;
 import android.os.Handler;
 import android.os.Message;
 import android.text.Spannable;
 import android.text.SpannableStringBuilder;
 import android.text.TextUtils;
 import android.text.format.DateUtils;
 import android.text.format.Formatter;
 import android.text.format.Formatter.BytesResult;
 import android.text.format.Time;
 import android.util.AttributeSet;
 import android.view.MotionEvent;
 import android.view.View;

 import com.android.settings.R;
 import com.android.settings.widget.ChartSweepView.OnSweepListener;

 import java.util.Arrays;
 import java.util.Calendar;
 import java.util.Objects;

 import static android.net.TrafficStats.MB_IN_BYTES;

 /**
  * Specific {@link ChartView} that displays {@link ChartNetworkSeriesView} along
  * with {@link ChartSweepView} for inspection ranges and warning/limits.
  */
 public class ChartDataUsageView extends ChartView {

     private static final int MSG_UPDATE_AXIS = 100;
     private static final long DELAY_MILLIS = 250;

     private ChartGridView mGrid;
     private ChartNetworkSeriesView mSeries;
     private ChartNetworkSeriesView mDetailSeries;

     private NetworkStatsHistory mHistory;

     private ChartSweepView mSweepWarning;
     private ChartSweepView mSweepLimit;

     private long mInspectStart;
     private long mInspectEnd;

     private Handler mHandler;

     /** Current maximum value of {@link #mVert}. */
     private long mVertMax;

     public interface DataUsageChartListener {
         public void onWarningChanged();
         public void onLimitChanged();
         public void requestWarningEdit();
         public void requestLimitEdit();
     }

     private DataUsageChartListener mListener;

     public ChartDataUsageView(Context context) {
         this(context, null, 0);
     }

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

     public ChartDataUsageView(Context context, AttributeSet attrs, int defStyle) {
         super(context, attrs, defStyle);
         init(new TimeAxis(), new InvertedChartAxis(new DataAxis()));

         mHandler = new Handler() {
             @Override
             public void handleMessage(Message msg) {
                 final ChartSweepView sweep = (ChartSweepView) msg.obj;
                 updateVertAxisBounds(sweep);
                 updateEstimateVisible();

                 // we keep dispatching repeating updates until sweep is dropped
                 sendUpdateAxisDelayed(sweep, true);
             }
         };
     }

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

         mGrid = (ChartGridView) findViewById(R.id.grid);
         mSeries = (ChartNetworkSeriesView) findViewById(R.id.series);
         mDetailSeries = (ChartNetworkSeriesView) findViewById(R.id.detail_series);
         mDetailSeries.setVisibility(View.GONE);

         mSweepLimit = (ChartSweepView) findViewById(R.id.sweep_limit);
         mSweepWarning = (ChartSweepView) findViewById(R.id.sweep_warning);

         // prevent sweeps from crossing each other
         mSweepWarning.setValidRangeDynamic(null, mSweepLimit);
         mSweepLimit.setValidRangeDynamic(mSweepWarning, null);

         // mark neighbors for checking touch events against
         mSweepLimit.setNeighbors(mSweepWarning);
         mSweepWarning.setNeighbors(mSweepLimit);

         mSweepWarning.addOnSweepListener(mVertListener);
         mSweepLimit.addOnSweepListener(mVertListener);

         mSweepWarning.setDragInterval(5 * MB_IN_BYTES);
         mSweepLimit.setDragInterval(5 * MB_IN_BYTES);

         // tell everyone about our axis
         mGrid.init(mHoriz, mVert);
         mSeries.init(mHoriz, mVert);
         mDetailSeries.init(mHoriz, mVert);
         mSweepWarning.init(mVert);
         mSweepLimit.init(mVert);

         setActivated(false);
     }

     public void setListener(DataUsageChartListener listener) {
         mListener = listener;
     }

     public void bindNetworkStats(NetworkStatsHistory stats) {
         mSeries.bindNetworkStats(stats);
         mHistory = stats;
         updateVertAxisBounds(null);
         updateEstimateVisible();
         updatePrimaryRange();
         requestLayout();
     }

     public void bindDetailNetworkStats(NetworkStatsHistory stats) {
         mDetailSeries.bindNetworkStats(stats);
         mDetailSeries.setVisibility(stats != null ? View.VISIBLE : View.GONE);
         if (mHistory != null) {
             mDetailSeries.setEndTime(mHistory.getEnd());
         }
         updateVertAxisBounds(null);
         updateEstimateVisible();
         updatePrimaryRange();
         requestLayout();
     }

     public void bindNetworkPolicy(NetworkPolicy policy) {
         if (policy == null) {
             mSweepLimit.setVisibility(View.INVISIBLE);
             mSweepLimit.setValue(-1);
             mSweepWarning.setVisibility(View.INVISIBLE);
             mSweepWarning.setValue(-1);
             return;
         }

         if (policy.limitBytes != NetworkPolicy.LIMIT_DISABLED) {
             mSweepLimit.setVisibility(View.VISIBLE);
             mSweepLimit.setEnabled(true);
             mSweepLimit.setValue(policy.limitBytes);
         } else {
             mSweepLimit.setVisibility(View.INVISIBLE);
             mSweepLimit.setEnabled(false);
             mSweepLimit.setValue(-1);
         }

         if (policy.warningBytes != NetworkPolicy.WARNING_DISABLED) {
             mSweepWarning.setVisibility(View.VISIBLE);
             mSweepWarning.setValue(policy.warningBytes);
         } else {
             mSweepWarning.setVisibility(View.INVISIBLE);
             mSweepWarning.setValue(-1);
         }

         updateVertAxisBounds(null);
         requestLayout();
         invalidate();
     }

     /**
      * Update {@link #mVert} to both show data from {@link NetworkStatsHistory}
      * and controls from {@link NetworkPolicy}.
      */
     private void updateVertAxisBounds(ChartSweepView activeSweep) {
         final long max = mVertMax;

         long newMax = 0;
         if (activeSweep != null) {
             final int adjustAxis = activeSweep.shouldAdjustAxis();
             if (adjustAxis > 0) {
                 // hovering around upper edge, grow axis
                 newMax = max * 11 / 10;
             } else if (adjustAxis < 0) {
                 // hovering around lower edge, shrink axis
                 newMax = max * 9 / 10;
             } else {
                 newMax = max;
             }
         }

         // always show known data and policy lines
         final long maxSweep = Math.max(mSweepWarning.getValue(), mSweepLimit.getValue());
         final long maxSeries = Math.max(mSeries.getMaxVisible(), mDetailSeries.getMaxVisible());
         final long maxVisible = Math.max(maxSeries, maxSweep) * 12 / 10;
         final long maxDefault = Math.max(maxVisible, 50 * MB_IN_BYTES);
         newMax = Math.max(maxDefault, newMax);

         // only invalidate when vertMax actually changed
         if (newMax != mVertMax) {
             mVertMax = newMax;

             final boolean changed = mVert.setBounds(0L, newMax);
             mSweepWarning.setValidRange(0L, newMax);
             mSweepLimit.setValidRange(0L, newMax);

             if (changed) {
                 mSeries.invalidatePath();
                 mDetailSeries.invalidatePath();
             }

             mGrid.invalidate();

             // since we just changed axis, make sweep recalculate its value
             if (activeSweep != null) {
                 activeSweep.updateValueFromPosition();
             }

             // layout other sweeps to match changed axis
             // TODO: find cleaner way of doing this, such as requesting full
             // layout and making activeSweep discard its tracking MotionEvent.
             if (mSweepLimit != activeSweep) {
                 layoutSweep(mSweepLimit);
             }
             if (mSweepWarning != activeSweep) {
                 layoutSweep(mSweepWarning);
             }
         }
     }

     /**
      * Control {@link ChartNetworkSeriesView#setEstimateVisible(boolean)} based
      * on how close estimate comes to {@link #mSweepWarning}.
      */
     private void updateEstimateVisible() {
         final long maxEstimate = mSeries.getMaxEstimate();

         // show estimate when near warning/limit
         long interestLine = Long.MAX_VALUE;
         if (mSweepWarning.isEnabled()) {
             interestLine = mSweepWarning.getValue();
         } else if (mSweepLimit.isEnabled()) {
             interestLine = mSweepLimit.getValue();
         }

         if (interestLine < 0) {
             interestLine = Long.MAX_VALUE;
         }

         final boolean estimateVisible = (maxEstimate >= interestLine * 7 / 10);
         mSeries.setEstimateVisible(estimateVisible);
     }

     private void sendUpdateAxisDelayed(ChartSweepView sweep, boolean force) {
         if (force || !mHandler.hasMessages(MSG_UPDATE_AXIS, sweep)) {
             mHandler.sendMessageDelayed(
                     mHandler.obtainMessage(MSG_UPDATE_AXIS, sweep), DELAY_MILLIS);
         }
     }

     private void clearUpdateAxisDelayed(ChartSweepView sweep) {
         mHandler.removeMessages(MSG_UPDATE_AXIS, sweep);
     }

     private OnSweepListener mVertListener = new OnSweepListener() {
         @Override
         public void onSweep(ChartSweepView sweep, boolean sweepDone) {
             if (sweepDone) {
                 clearUpdateAxisDelayed(sweep);
                 updateEstimateVisible();

                 if (sweep == mSweepWarning && mListener != null) {
                     mListener.onWarningChanged();
                 } else if (sweep == mSweepLimit && mListener != null) {
                     mListener.onLimitChanged();
                 }
             } else {
                 // while moving, kick off delayed grow/shrink axis updates
                 sendUpdateAxisDelayed(sweep, false);
             }
         }

         @Override
         public void requestEdit(ChartSweepView sweep) {
             if (sweep == mSweepWarning && mListener != null) {
                 mListener.requestWarningEdit();
             } else if (sweep == mSweepLimit && mListener != null) {
                 mListener.requestLimitEdit();
             }
         }
     };

     @Override
     public boolean onTouchEvent(MotionEvent event) {
         if (isActivated()) return false;
         switch (event.getAction()) {
             case MotionEvent.ACTION_DOWN: {
                 return true;
             }
             case MotionEvent.ACTION_UP: {
                 setActivated(true);
                 return true;
             }
             default: {
                 return false;
             }
         }
     }

     public long getInspectStart() {
         return mInspectStart;
     }

     public long getInspectEnd() {
         return mInspectEnd;
     }

     public long getWarningBytes() {
         return mSweepWarning.getLabelValue();
     }

     public long getLimitBytes() {
         return mSweepLimit.getLabelValue();
     }

     /**
      * Set the exact time range that should be displayed, updating how
      * {@link ChartNetworkSeriesView} paints. Moves inspection ranges to be the
      * last "week" of available data, without triggering listener events.
      */
     public void setVisibleRange(long visibleStart, long visibleEnd) {
         final boolean changed = mHoriz.setBounds(visibleStart, visibleEnd);
         mGrid.setBounds(visibleStart, visibleEnd);
         mSeries.setBounds(visibleStart, visibleEnd);
         mDetailSeries.setBounds(visibleStart, visibleEnd);

         mInspectStart = visibleStart;
         mInspectEnd = visibleEnd;

         requestLayout();
         if (changed) {
             mSeries.invalidatePath();
             mDetailSeries.invalidatePath();
         }

         updateVertAxisBounds(null);
         updateEstimateVisible();
         updatePrimaryRange();
     }

     private void updatePrimaryRange() {
         // prefer showing primary range on detail series, when available
         if (mDetailSeries.getVisibility() == View.VISIBLE) {
             mSeries.setSecondary(true);
         } else {
             mSeries.setSecondary(false);
         }
     }

     public static class TimeAxis implements ChartAxis {
         private static final int FIRST_DAY_OF_WEEK = Calendar.getInstance().getFirstDayOfWeek() - 1;

         private long mMin;
         private long mMax;
         private float mSize;

         public TimeAxis() {
             final long currentTime = System.currentTimeMillis();
             setBounds(currentTime - DateUtils.DAY_IN_MILLIS * 30, currentTime);
         }

         @Override
         public int hashCode() {
             return Objects.hash(mMin, mMax, mSize);
         }

         @Override
         public boolean setBounds(long min, long max) {
             if (mMin != min || mMax != max) {
                 mMin = min;
                 mMax = max;
                 return true;
             } else {
                 return false;
             }
         }

         @Override
         public boolean setSize(float size) {
             if (mSize != size) {
                 mSize = size;
                 return true;
             } else {
                 return false;
             }
         }

         @Override
         public float convertToPoint(long value) {
             return (mSize * (value - mMin)) / (mMax - mMin);
         }

         @Override
         public long convertToValue(float point) {
             return (long) (mMin + ((point * (mMax - mMin)) / mSize));
         }

         @Override
         public long buildLabel(Resources res, SpannableStringBuilder builder, long value) {
             // TODO: convert to better string
             builder.replace(0, builder.length(), Long.toString(value));
             return value;
         }

         @Override
         public float[] getTickPoints() {
             final float[] ticks = new float[32];
             int i = 0;

             // tick mark for first day of each week
             final Time time = new Time();
             time.set(mMax);
             time.monthDay -= time.weekDay - FIRST_DAY_OF_WEEK;
             time.hour = time.minute = time.second = 0;

             time.normalize(true);
             long timeMillis = time.toMillis(true);
             while (timeMillis > mMin) {
                 if (timeMillis <= mMax) {
                     ticks[i++] = convertToPoint(timeMillis);
                 }
                 time.monthDay -= 7;
                 time.normalize(true);
                 timeMillis = time.toMillis(true);
             }

             return Arrays.copyOf(ticks, i);
         }

         @Override
         public int shouldAdjustAxis(long value) {
             // time axis never adjusts
             return 0;
         }
     }

     public static class DataAxis implements ChartAxis {
         private long mMin;
         private long mMax;
         private float mSize;

         private static final boolean LOG_SCALE = false;

         @Override
         public int hashCode() {
             return Objects.hash(mMin, mMax, mSize);
         }

         @Override
         public boolean setBounds(long min, long max) {
             if (mMin != min || mMax != max) {
                 mMin = min;
                 mMax = max;
                 return true;
             } else {
                 return false;
             }
         }

         @Override
         public boolean setSize(float size) {
             if (mSize != size) {
                 mSize = size;
                 return true;
             } else {
                 return false;
             }
         }

         @Override
         public float convertToPoint(long value) {
             if (LOG_SCALE) {
                 // derived polynomial fit to make lower values more visible
                 final double normalized = ((double) value - mMin) / (mMax - mMin);
                 final double fraction = Math.pow(10,
                         0.36884343106175121463 * Math.log10(normalized) + -0.04328199452018252624);
                 return (float) (fraction * mSize);
             } else {
                 return (mSize * (value - mMin)) / (mMax - mMin);
             }
         }

         @Override
         public long convertToValue(float point) {
             if (LOG_SCALE) {
                 final double normalized = point / mSize;
                 final double fraction = 1.3102228476089056629
                         * Math.pow(normalized, 2.7111774693164631640);
                 return (long) (mMin + (fraction * (mMax - mMin)));
             } else {
                 return (long) (mMin + ((point * (mMax - mMin)) / mSize));
             }
         }

         private static final Object sSpanSize = new Object();
         private static final Object sSpanUnit = new Object();

         @Override
         public long buildLabel(Resources res, SpannableStringBuilder builder, long value) {
             final BytesResult result = Formatter.formatBytes(res, value,
                     Formatter.FLAG_SHORTER | Formatter.FLAG_CALCULATE_ROUNDED);
             setText(builder, sSpanSize, result.value, "^1");
             setText(builder, sSpanUnit, result.units, "^2");
             return result.roundedBytes;
         }

         @Override
         public float[] getTickPoints() {
             final long range = mMax - mMin;

             // target about 16 ticks on screen, rounded to nearest power of 2
             final long tickJump = roundUpToPowerOfTwo(range / 16);
             final int tickCount = (int) (range / tickJump);
             final float[] tickPoints = new float[tickCount];
             long value = mMin;
             for (int i = 0; i < tickPoints.length; i++) {
                 tickPoints[i] = convertToPoint(value);
                 value += tickJump;
             }

             return tickPoints;
         }

         @Override
         public int shouldAdjustAxis(long value) {
             final float point = convertToPoint(value);
             if (point < mSize * 0.1) {
                 return -1;
             } else if (point > mSize * 0.85) {
                 return 1;
             } else {
                 return 0;
             }
         }
     }

     private static void setText(
             SpannableStringBuilder builder, Object key, CharSequence text, String bootstrap) {
         int start = builder.getSpanStart(key);
         int end = builder.getSpanEnd(key);
         if (start == -1) {
             start = TextUtils.indexOf(builder, bootstrap);
             end = start + bootstrap.length();
             builder.setSpan(key, start, end, Spannable.SPAN_INCLUSIVE_INCLUSIVE);
         }
         builder.replace(start, end, text);
     }

     private static long roundUpToPowerOfTwo(long i) {
         // NOTE: borrowed from Hashtable.roundUpToPowerOfTwo()

         i--; // If input is a power of two, shift its high-order bit right

         // "Smear" the high-order bit all the way to the right
         i |= i >>>  1;
         i |= i >>>  2;
         i |= i >>>  4;
         i |= i >>>  8;
         i |= i >>> 16;
         i |= i >>> 32;

         i++;

         return i > 0 ? i : Long.MAX_VALUE;
     }
 }
	/*
	* Copyright (C) 2011 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.settings.widget;

	import android.content.Context;
	import android.content.res.Resources;
	import android.net.NetworkPolicy;
	import android.net.NetworkStatsHistory;
	import android.os.Handler;
	import android.os.Message;
	import android.text.Spannable;
	import android.text.SpannableStringBuilder;
	import android.text.TextUtils;
	import android.text.format.DateUtils;
	import android.text.format.Formatter;
	import android.text.format.Formatter.BytesResult;
	import android.text.format.Time;
	import android.util.AttributeSet;
	import android.view.MotionEvent;
	import android.view.View;

	import com.android.settings.R;
	import com.android.settings.widget.ChartSweepView.OnSweepListener;

	import java.util.Arrays;
	import java.util.Calendar;
	import java.util.Objects;

	import static android.net.TrafficStats.MB_IN_BYTES;

	/**
	* Specific {@link ChartView} that displays {@link ChartNetworkSeriesView} along
	* with {@link ChartSweepView} for inspection ranges and warning/limits.
	*/
	public class ChartDataUsageView extends ChartView {

	private static final int MSG_UPDATE_AXIS = 100;
	private static final long DELAY_MILLIS = 250;

	private ChartGridView mGrid;
	private ChartNetworkSeriesView mSeries;
	private ChartNetworkSeriesView mDetailSeries;

	private NetworkStatsHistory mHistory;

	private ChartSweepView mSweepWarning;
	private ChartSweepView mSweepLimit;

	private long mInspectStart;
	private long mInspectEnd;

	private Handler mHandler;

	/** Current maximum value of {@link #mVert}. */
	private long mVertMax;

	public interface DataUsageChartListener {
	public void onWarningChanged();
	public void onLimitChanged();
	public void requestWarningEdit();
	public void requestLimitEdit();
	}

	private DataUsageChartListener mListener;

	public ChartDataUsageView(Context context) {
	this(context, null, 0);
	}

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

	public ChartDataUsageView(Context context, AttributeSet attrs, int defStyle) {
	super(context, attrs, defStyle);
	init(new TimeAxis(), new InvertedChartAxis(new DataAxis()));

	mHandler = new Handler() {
	@Override
	public void handleMessage(Message msg) {
	final ChartSweepView sweep = (ChartSweepView) msg.obj;
	updateVertAxisBounds(sweep);
	updateEstimateVisible();

	// we keep dispatching repeating updates until sweep is dropped
	sendUpdateAxisDelayed(sweep, true);
	}
	};
	}

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

	mGrid = (ChartGridView) findViewById(R.id.grid);
	mSeries = (ChartNetworkSeriesView) findViewById(R.id.series);
	mDetailSeries = (ChartNetworkSeriesView) findViewById(R.id.detail_series);
	mDetailSeries.setVisibility(View.GONE);

	mSweepLimit = (ChartSweepView) findViewById(R.id.sweep_limit);
	mSweepWarning = (ChartSweepView) findViewById(R.id.sweep_warning);

	// prevent sweeps from crossing each other
	mSweepWarning.setValidRangeDynamic(null, mSweepLimit);
	mSweepLimit.setValidRangeDynamic(mSweepWarning, null);

	// mark neighbors for checking touch events against
	mSweepLimit.setNeighbors(mSweepWarning);
	mSweepWarning.setNeighbors(mSweepLimit);

	mSweepWarning.addOnSweepListener(mVertListener);
	mSweepLimit.addOnSweepListener(mVertListener);

	mSweepWarning.setDragInterval(5 * MB_IN_BYTES);
	mSweepLimit.setDragInterval(5 * MB_IN_BYTES);

	// tell everyone about our axis
	mGrid.init(mHoriz, mVert);
	mSeries.init(mHoriz, mVert);
	mDetailSeries.init(mHoriz, mVert);
	mSweepWarning.init(mVert);
	mSweepLimit.init(mVert);

	setActivated(false);
	}

	public void setListener(DataUsageChartListener listener) {
	mListener = listener;
	}

	public void bindNetworkStats(NetworkStatsHistory stats) {
	mSeries.bindNetworkStats(stats);
	mHistory = stats;
	updateVertAxisBounds(null);
	updateEstimateVisible();
	updatePrimaryRange();
	requestLayout();
	}

	public void bindDetailNetworkStats(NetworkStatsHistory stats) {
	mDetailSeries.bindNetworkStats(stats);
	mDetailSeries.setVisibility(stats != null ? View.VISIBLE : View.GONE);
	if (mHistory != null) {
	mDetailSeries.setEndTime(mHistory.getEnd());
	}
	updateVertAxisBounds(null);
	updateEstimateVisible();
	updatePrimaryRange();
	requestLayout();
	}

	public void bindNetworkPolicy(NetworkPolicy policy) {
	if (policy == null) {
	mSweepLimit.setVisibility(View.INVISIBLE);
	mSweepLimit.setValue(-1);
	mSweepWarning.setVisibility(View.INVISIBLE);
	mSweepWarning.setValue(-1);
	return;
	}

	if (policy.limitBytes != NetworkPolicy.LIMIT_DISABLED) {
	mSweepLimit.setVisibility(View.VISIBLE);
	mSweepLimit.setEnabled(true);
	mSweepLimit.setValue(policy.limitBytes);
	} else {
	mSweepLimit.setVisibility(View.INVISIBLE);
	mSweepLimit.setEnabled(false);
	mSweepLimit.setValue(-1);
	}

	if (policy.warningBytes != NetworkPolicy.WARNING_DISABLED) {
	mSweepWarning.setVisibility(View.VISIBLE);
	mSweepWarning.setValue(policy.warningBytes);
	} else {
	mSweepWarning.setVisibility(View.INVISIBLE);
	mSweepWarning.setValue(-1);
	}

	updateVertAxisBounds(null);
	requestLayout();
	invalidate();
	}

	/**
	* Update {@link #mVert} to both show data from {@link NetworkStatsHistory}
	* and controls from {@link NetworkPolicy}.
	*/
	private void updateVertAxisBounds(ChartSweepView activeSweep) {
	final long max = mVertMax;

	long newMax = 0;
	if (activeSweep != null) {
	final int adjustAxis = activeSweep.shouldAdjustAxis();
	if (adjustAxis > 0) {
	// hovering around upper edge, grow axis
	newMax = max * 11 / 10;
	} else if (adjustAxis < 0) {
	// hovering around lower edge, shrink axis
	newMax = max * 9 / 10;
	} else {
	newMax = max;
	}
	}

	// always show known data and policy lines
	final long maxSweep = Math.max(mSweepWarning.getValue(), mSweepLimit.getValue());
	final long maxSeries = Math.max(mSeries.getMaxVisible(), mDetailSeries.getMaxVisible());
	final long maxVisible = Math.max(maxSeries, maxSweep) * 12 / 10;
	final long maxDefault = Math.max(maxVisible, 50 * MB_IN_BYTES);
	newMax = Math.max(maxDefault, newMax);

	// only invalidate when vertMax actually changed
	if (newMax != mVertMax) {
	mVertMax = newMax;

	final boolean changed = mVert.setBounds(0L, newMax);
	mSweepWarning.setValidRange(0L, newMax);
	mSweepLimit.setValidRange(0L, newMax);

	if (changed) {
	mSeries.invalidatePath();
	mDetailSeries.invalidatePath();
	}

	mGrid.invalidate();

	// since we just changed axis, make sweep recalculate its value
	if (activeSweep != null) {
	activeSweep.updateValueFromPosition();
	}

	// layout other sweeps to match changed axis
	// TODO: find cleaner way of doing this, such as requesting full
	// layout and making activeSweep discard its tracking MotionEvent.
	if (mSweepLimit != activeSweep) {
	layoutSweep(mSweepLimit);
	}
	if (mSweepWarning != activeSweep) {
	layoutSweep(mSweepWarning);
	}
	}
	}

	/**
	* Control {@link ChartNetworkSeriesView#setEstimateVisible(boolean)} based
	* on how close estimate comes to {@link #mSweepWarning}.
	*/
	private void updateEstimateVisible() {
	final long maxEstimate = mSeries.getMaxEstimate();

	// show estimate when near warning/limit
	long interestLine = Long.MAX_VALUE;
	if (mSweepWarning.isEnabled()) {
	interestLine = mSweepWarning.getValue();
	} else if (mSweepLimit.isEnabled()) {
	interestLine = mSweepLimit.getValue();
	}

	if (interestLine < 0) {
	interestLine = Long.MAX_VALUE;
	}

	final boolean estimateVisible = (maxEstimate >= interestLine * 7 / 10);
	mSeries.setEstimateVisible(estimateVisible);
	}

	private void sendUpdateAxisDelayed(ChartSweepView sweep, boolean force) {
	if (force \|\| !mHandler.hasMessages(MSG_UPDATE_AXIS, sweep)) {
	mHandler.sendMessageDelayed(
	mHandler.obtainMessage(MSG_UPDATE_AXIS, sweep), DELAY_MILLIS);
	}
	}

	private void clearUpdateAxisDelayed(ChartSweepView sweep) {
	mHandler.removeMessages(MSG_UPDATE_AXIS, sweep);
	}

	private OnSweepListener mVertListener = new OnSweepListener() {
	@Override
	public void onSweep(ChartSweepView sweep, boolean sweepDone) {
	if (sweepDone) {
	clearUpdateAxisDelayed(sweep);
	updateEstimateVisible();

	if (sweep == mSweepWarning && mListener != null) {
	mListener.onWarningChanged();
	} else if (sweep == mSweepLimit && mListener != null) {
	mListener.onLimitChanged();
	}
	} else {
	// while moving, kick off delayed grow/shrink axis updates
	sendUpdateAxisDelayed(sweep, false);
	}
	}

	@Override
	public void requestEdit(ChartSweepView sweep) {
	if (sweep == mSweepWarning && mListener != null) {
	mListener.requestWarningEdit();
	} else if (sweep == mSweepLimit && mListener != null) {
	mListener.requestLimitEdit();
	}
	}
	};

	@Override
	public boolean onTouchEvent(MotionEvent event) {
	if (isActivated()) return false;
	switch (event.getAction()) {
	case MotionEvent.ACTION_DOWN: {
	return true;
	}
	case MotionEvent.ACTION_UP: {
	setActivated(true);
	return true;
	}
	default: {
	return false;
	}
	}
	}

	public long getInspectStart() {
	return mInspectStart;
	}

	public long getInspectEnd() {
	return mInspectEnd;
	}

	public long getWarningBytes() {
	return mSweepWarning.getLabelValue();
	}

	public long getLimitBytes() {
	return mSweepLimit.getLabelValue();
	}

	/**
	* Set the exact time range that should be displayed, updating how
	* {@link ChartNetworkSeriesView} paints. Moves inspection ranges to be the
	* last "week" of available data, without triggering listener events.
	*/
	public void setVisibleRange(long visibleStart, long visibleEnd) {
	final boolean changed = mHoriz.setBounds(visibleStart, visibleEnd);
	mGrid.setBounds(visibleStart, visibleEnd);
	mSeries.setBounds(visibleStart, visibleEnd);
	mDetailSeries.setBounds(visibleStart, visibleEnd);

	mInspectStart = visibleStart;
	mInspectEnd = visibleEnd;

	requestLayout();
	if (changed) {
	mSeries.invalidatePath();
	mDetailSeries.invalidatePath();
	}

	updateVertAxisBounds(null);
	updateEstimateVisible();
	updatePrimaryRange();
	}

	private void updatePrimaryRange() {
	// prefer showing primary range on detail series, when available
	if (mDetailSeries.getVisibility() == View.VISIBLE) {
	mSeries.setSecondary(true);
	} else {
	mSeries.setSecondary(false);
	}
	}

	public static class TimeAxis implements ChartAxis {
	private static final int FIRST_DAY_OF_WEEK = Calendar.getInstance().getFirstDayOfWeek() - 1;

	private long mMin;
	private long mMax;
	private float mSize;

	public TimeAxis() {
	final long currentTime = System.currentTimeMillis();
	setBounds(currentTime - DateUtils.DAY_IN_MILLIS * 30, currentTime);
	}

	@Override
	public int hashCode() {
	return Objects.hash(mMin, mMax, mSize);
	}

	@Override
	public boolean setBounds(long min, long max) {
	if (mMin != min \|\| mMax != max) {
	mMin = min;
	mMax = max;
	return true;
	} else {
	return false;
	}
	}

	@Override
	public boolean setSize(float size) {
	if (mSize != size) {
	mSize = size;
	return true;
	} else {
	return false;
	}
	}

	@Override
	public float convertToPoint(long value) {
	return (mSize * (value - mMin)) / (mMax - mMin);
	}

	@Override
	public long convertToValue(float point) {
	return (long) (mMin + ((point * (mMax - mMin)) / mSize));
	}

	@Override
	public long buildLabel(Resources res, SpannableStringBuilder builder, long value) {
	// TODO: convert to better string
	builder.replace(0, builder.length(), Long.toString(value));
	return value;
	}

	@Override
	public float[] getTickPoints() {
	final float[] ticks = new float[32];
	int i = 0;

	// tick mark for first day of each week
	final Time time = new Time();
	time.set(mMax);
	time.monthDay -= time.weekDay - FIRST_DAY_OF_WEEK;
	time.hour = time.minute = time.second = 0;

	time.normalize(true);
	long timeMillis = time.toMillis(true);
	while (timeMillis > mMin) {
	if (timeMillis <= mMax) {
	ticks[i++] = convertToPoint(timeMillis);
	}
	time.monthDay -= 7;
	time.normalize(true);
	timeMillis = time.toMillis(true);
	}

	return Arrays.copyOf(ticks, i);
	}

	@Override
	public int shouldAdjustAxis(long value) {
	// time axis never adjusts
	return 0;
	}
	}

	public static class DataAxis implements ChartAxis {
	private long mMin;
	private long mMax;
	private float mSize;

	private static final boolean LOG_SCALE = false;

	@Override
	public int hashCode() {
	return Objects.hash(mMin, mMax, mSize);
	}

	@Override
	public boolean setBounds(long min, long max) {
	if (mMin != min \|\| mMax != max) {
	mMin = min;
	mMax = max;
	return true;
	} else {
	return false;
	}
	}

	@Override
	public boolean setSize(float size) {
	if (mSize != size) {
	mSize = size;
	return true;
	} else {
	return false;
	}
	}

	@Override
	public float convertToPoint(long value) {
	if (LOG_SCALE) {
	// derived polynomial fit to make lower values more visible
	final double normalized = ((double) value - mMin) / (mMax - mMin);
	final double fraction = Math.pow(10,
	0.36884343106175121463 * Math.log10(normalized) + -0.04328199452018252624);
	return (float) (fraction * mSize);
	} else {
	return (mSize * (value - mMin)) / (mMax - mMin);
	}
	}

	@Override
	public long convertToValue(float point) {
	if (LOG_SCALE) {
	final double normalized = point / mSize;
	final double fraction = 1.3102228476089056629
	* Math.pow(normalized, 2.7111774693164631640);
	return (long) (mMin + (fraction * (mMax - mMin)));
	} else {
	return (long) (mMin + ((point * (mMax - mMin)) / mSize));
	}
	}

	private static final Object sSpanSize = new Object();
	private static final Object sSpanUnit = new Object();

	@Override
	public long buildLabel(Resources res, SpannableStringBuilder builder, long value) {
	final BytesResult result = Formatter.formatBytes(res, value,
	Formatter.FLAG_SHORTER \| Formatter.FLAG_CALCULATE_ROUNDED);
	setText(builder, sSpanSize, result.value, "^1");
	setText(builder, sSpanUnit, result.units, "^2");
	return result.roundedBytes;
	}

	@Override
	public float[] getTickPoints() {
	final long range = mMax - mMin;

	// target about 16 ticks on screen, rounded to nearest power of 2
	final long tickJump = roundUpToPowerOfTwo(range / 16);
	final int tickCount = (int) (range / tickJump);
	final float[] tickPoints = new float[tickCount];
	long value = mMin;
	for (int i = 0; i < tickPoints.length; i++) {
	tickPoints[i] = convertToPoint(value);
	value += tickJump;
	}

	return tickPoints;
	}

	@Override
	public int shouldAdjustAxis(long value) {
	final float point = convertToPoint(value);
	if (point < mSize * 0.1) {
	return -1;
	} else if (point > mSize * 0.85) {
	return 1;
	} else {
	return 0;
	}
	}
	}

	private static void setText(
	SpannableStringBuilder builder, Object key, CharSequence text, String bootstrap) {
	int start = builder.getSpanStart(key);
	int end = builder.getSpanEnd(key);
	if (start == -1) {
	start = TextUtils.indexOf(builder, bootstrap);
	end = start + bootstrap.length();
	builder.setSpan(key, start, end, Spannable.SPAN_INCLUSIVE_INCLUSIVE);
	}
	builder.replace(start, end, text);
	}

	private static long roundUpToPowerOfTwo(long i) {
	// NOTE: borrowed from Hashtable.roundUpToPowerOfTwo()

	i--; // If input is a power of two, shift its high-order bit right

	// "Smear" the high-order bit all the way to the right
	i \|= i >>> 1;
	i \|= i >>> 2;
	i \|= i >>> 4;
	i \|= i >>> 8;
	i \|= i >>> 16;
	i \|= i >>> 32;

	i++;

	return i > 0 ? i : Long.MAX_VALUE;
	}
	}