Changed train length/estimated arrival change timing

Prototyped departure alert dialog

res/layout/departure_listing.xml

@@ -52,7 +52,7 @@
         android:layout_height="wrap_content"
         android:layout_below="@id/topRow"
         android:layout_toRightOf="@id/destinationColorBar"
-        bart:tickInterval="3" />
+        bart:tickInterval="1" />
 
     <TextView
         android:id="@+id/uncertainty"

res/layout/train_alert_dialog.xml

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="horizontal" >
+
+    <net.simonvt.widget.NumberPicker
+        android:id="@+id/numberPicker"
+        android:layout_width="match_parent"
+        android:layout_height="100dp"
+        android:layout_weight="1" >
+    </net.simonvt.widget.NumberPicker>
+
+    <TextView
+        android:id="@+id/textView1"
+        style="@style/LargeText"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:layout_weight="1"
+        android:gravity="center_vertical"
+        android:maxLines="3"
+        android:singleLine="false"
+        android:text="minutes before departure" />
+
+</LinearLayout>

res/values/styles.xml

@@ -2,7 +2,13 @@
 <resources xmlns:android="http://schemas.android.com/apk/res/android">
 
     <!-- Base application theme is the default theme. -->
-    <style name="AppTheme" parent="@style/Theme.HoloEverywhereDark.Sherlock"></style>
+
+    <style name="AppTheme" parent="@style/Theme.HoloEverywhereDark.Sherlock">
+        <item name="numberPickerUpButtonStyle">@style/NPWidget.Holo.ImageButton.NumberPickerUpButton</item>
+        <item name="numberPickerDownButtonStyle">@style/NPWidget.Holo.ImageButton.NumberPickerDownButton</item>
+        <item name="numberPickerInputTextStyle">@style/NPWidget.Holo.EditText.NumberPickerInputText</item>
+        <item name="numberPickerStyle">@style/NPWidget.Holo.NumberPicker</item>
+    </style>
 
     <style name="ButtonBar">
         <item name="android:layout_width">fill_parent</item>

src/com/dougkeen/bart/DepartureArrayAdapter.java

@@ -73,23 +73,22 @@ public class DepartureArrayAdapter extends ArrayAdapter<Departure> {
 		initTextSwitcher(textSwitcher);
 
 		textSwitcher.setCurrentText(departure.getTrainLengthText());
-		textSwitcher.setTextProviders(new TextProvider[] { new TextProvider() {
+		textSwitcher.setTextProvider(new TextProvider() {
 			@Override
-			public String getText() {
-				final String estimatedArrivalTimeText = departure
-						.getEstimatedArrivalTimeText(getContext());
-				if (StringUtils.isBlank(estimatedArrivalTimeText)) {
-					return "";
+			public String getText(long tickNumber) {
+				if (tickNumber % 4 == 0) {
+					return departure.getTrainLengthText();
 				} else {
-					return "Est. arrival " + estimatedArrivalTimeText;
+					final String estimatedArrivalTimeText = departure
+							.getEstimatedArrivalTimeText(getContext());
+					if (StringUtils.isBlank(estimatedArrivalTimeText)) {
+						return "";
+					} else {
+						return "Est. arrival " + estimatedArrivalTimeText;
+					}
 				}
 			}
-		}, new TextProvider() {
-			@Override
-			public String getText() {
-				return departure.getTrainLengthText();
-			}
-		} });
+		});
 
 		ImageView colorBar = (ImageView) view
 				.findViewById(R.id.destinationColorBar);
@@ -100,7 +99,7 @@ public class DepartureArrayAdapter extends ArrayAdapter<Departure> {
 		countdownTextView.setText(departure.getCountdownText());
 		countdownTextView.setTextProvider(new TextProvider() {
 			@Override
-			public String getText() {
+			public String getText(long tickNumber) {
 				return departure.getCountdownText();
 			}
 		});

src/com/dougkeen/bart/TrainAlertDialogFragment.java

@@ -0,0 +1,89 @@
+package com.dougkeen.bart;
+
+import net.simonvt.widget.NumberPicker;
+import android.app.Dialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.SharedPreferences;
+import android.content.SharedPreferences.Editor;
+import android.os.Bundle;
+import android.support.v4.app.DialogFragment;
+import android.support.v4.app.FragmentActivity;
+
+import com.WazaBe.HoloEverywhere.AlertDialog;
+import com.dougkeen.bart.model.Departure;
+
+public class TrainAlertDialogFragment extends DialogFragment {
+
+	private static final String KEY_LAST_ALERT_DELAY = "lastAlertDelay";
+	private Departure mDeparture;
+
+	public TrainAlertDialogFragment(Departure mDeparture) {
+		super();
+		this.mDeparture = mDeparture;
+	}
+
+	@Override
+	public void onStart() {
+		super.onStart();
+
+		SharedPreferences preferences = getActivity().getPreferences(
+				Context.MODE_PRIVATE);
+		int lastAlertDelay = preferences.getInt(KEY_LAST_ALERT_DELAY, 5);
+
+		NumberPicker numberPicker = (NumberPicker) getDialog().findViewById(
+				R.id.numberPicker);
+
+		final int maxValue = mDeparture.getMeanSecondsLeft() / 60;
+
+		String[] displayedValues = new String[maxValue];
+		for (int i = 1; i <= maxValue; i++) {
+			displayedValues[i - 1] = String.valueOf(i);
+		}
+		numberPicker.setMinValue(1);
+		numberPicker.setMaxValue(maxValue);
+		numberPicker.setDisplayedValues(displayedValues);
+
+		if (maxValue >= lastAlertDelay) {
+			numberPicker.setValue(lastAlertDelay);
+		} else if (maxValue >= 5) {
+			numberPicker.setValue(5);
+		} else if (maxValue >= 3) {
+			numberPicker.setValue(3);
+		} else {
+			numberPicker.setValue(1);
+		}
+	}
+
+	@Override
+	public Dialog onCreateDialog(Bundle savedInstanceState) {
+		final FragmentActivity activity = getActivity();
+
+		return new AlertDialog.Builder(activity)
+				.setTitle(R.string.set_up_departure_alert)
+				.setCancelable(true)
+				.setView(R.layout.train_alert_dialog)
+				.setPositiveButton(R.string.ok,
+						new DialogInterface.OnClickListener() {
+							@Override
+							public void onClick(DialogInterface dialog,
+									int which) {
+								NumberPicker numberPicker = (NumberPicker) getDialog()
+										.findViewById(R.id.numberPicker);
+
+								Editor editor = getActivity().getPreferences(
+										Context.MODE_PRIVATE).edit();
+								editor.putInt(KEY_LAST_ALERT_DELAY,
+										numberPicker.getValue());
+								editor.commit();
+							}
+						})
+				.setNegativeButton(R.string.skip_alert,
+						new DialogInterface.OnClickListener() {
+							public void onClick(DialogInterface dialog,
+									int whichButton) {
+								dialog.cancel();
+							}
+						}).create();
+	}
+}

src/com/dougkeen/bart/ViewDeparturesActivity.java

@@ -19,13 +19,14 @@ import android.text.format.DateFormat;
 import android.text.util.Linkify;
 import android.util.Log;
 import android.view.View;
+import android.widget.AdapterView;
 import android.widget.ImageView;
-import android.widget.ListView;
+import android.widget.ListAdapter;
 import android.widget.ProgressBar;
 import android.widget.TextView;
 import android.widget.Toast;
 
-import com.actionbarsherlock.app.SherlockListActivity;
+import com.actionbarsherlock.app.SherlockFragmentActivity;
 import com.actionbarsherlock.view.ActionMode;
 import com.actionbarsherlock.view.Menu;
 import com.actionbarsherlock.view.MenuInflater;
@@ -44,12 +45,10 @@ import com.dougkeen.bart.model.TextProvider;
 import com.dougkeen.bart.networktasks.GetRealTimeDeparturesTask;
 import com.dougkeen.bart.networktasks.GetScheduleInformationTask;
 
-public class ViewDeparturesActivity extends SherlockListActivity {
+public class ViewDeparturesActivity extends SherlockFragmentActivity {
 
 	private static final int UNCERTAINTY_THRESHOLD = 17;
 
-	private static final int DIALOG_SET_ALERT = 1;
-
 	private Uri mUri;
 
 	private Station mOrigin;
@@ -138,6 +137,20 @@ public class ViewDeparturesActivity extends SherlockListActivity {
 			}
 		}
 		setListAdapter(mDeparturesAdapter);
+		getListView().setEmptyView(findViewById(android.R.id.empty));
+		getListView().setOnItemClickListener(
+				new AdapterView.OnItemClickListener() {
+					@Override
+					public void onItemClick(AdapterView<?> adapterView,
+							View view, int position, long id) {
+						mSelectedDeparture = (Departure) getListAdapter()
+								.getItem(position);
+						if (mActionMode != null) {
+							mActionMode.finish();
+						}
+						startDepartureActionMode();
+					}
+				});
 
 		findViewById(R.id.missingDepartureText).setVisibility(View.VISIBLE);
 
@@ -147,6 +160,22 @@ public class ViewDeparturesActivity extends SherlockListActivity {
 		getSupportActionBar().setDisplayHomeAsUpEnabled(true);
 	}
 
+	@SuppressWarnings("unchecked")
+	private AdapterView<ListAdapter> getListView() {
+		return (AdapterView<ListAdapter>) findViewById(android.R.id.list);
+	}
+
+	private DepartureArrayAdapter mListAdapter;
+
+	protected DepartureArrayAdapter getListAdapter() {
+		return mListAdapter;
+	}
+
+	protected void setListAdapter(DepartureArrayAdapter adapter) {
+		mListAdapter = adapter;
+		getListView().setAdapter(mListAdapter);
+	}
+
 	@Override
 	protected void onPause() {
 		cancelDataFetch();
@@ -310,9 +339,26 @@ public class ViewDeparturesActivity extends SherlockListActivity {
 		}
 
 		boolean needsBetterAccuracy = false;
+
+		// Keep track of first departure, since we'll request another quick
+		// refresh if it has departed.
 		Departure firstDeparture = null;
+
 		final List<Departure> departures = result.getDepartures();
-		if (mDeparturesAdapter.getCount() > 0) {
+		if (mDeparturesAdapter.isEmpty()) {
+			// Just copy everything to the adapter
+			for (Departure departure : departures) {
+				if (firstDeparture == null) {
+					firstDeparture = departure;
+				}
+				mDeparturesAdapter.add(departure);
+			}
+
+			// Since all the departures are new, we'll definitely need better
+			// accuracy
+			needsBetterAccuracy = true;
+		} else {
+			// Let's merge the latest departure list with the adapter
 			int adapterIndex = -1;
 			for (Departure departure : departures) {
 				adapterIndex++;
@@ -321,37 +367,42 @@ public class ViewDeparturesActivity extends SherlockListActivity {
 					existingDeparture = mDeparturesAdapter
 							.getItem(adapterIndex);
 				}
+				// Looks for departures at the beginning of the adapter that
+				// aren't in the latest list of departures
 				while (existingDeparture != null
 						&& !departure.equals(existingDeparture)) {
+					// Remove old departure
 					mDeparturesAdapter.remove(existingDeparture);
 					if (adapterIndex < mDeparturesAdapter.getCount()) {
+						// Try again with next departure (keep in mind the next
+						// departure is now at the current index, since we
+						// removed a member)
 						existingDeparture = mDeparturesAdapter
 								.getItem(adapterIndex);
 					} else {
+						// Reached the end of the adapter... give up
 						existingDeparture = null;
 					}
 				}
+				// Merge the estimate if we found a matching departure,
+				// otherwise add a new one to the adapter
 				if (existingDeparture != null) {
 					existingDeparture.mergeEstimate(departure);
 				} else {
 					mDeparturesAdapter.add(departure);
 					existingDeparture = departure;
 				}
+
+				// Set first departure
 				if (firstDeparture == null) {
 					firstDeparture = existingDeparture;
 				}
+
+				// Check if estimate is accurate enough
 				if (existingDeparture.getUncertaintySeconds() > UNCERTAINTY_THRESHOLD) {
 					needsBetterAccuracy = true;
 				}
 			}
-		} else {
-			for (Departure departure : departures) {
-				if (firstDeparture == null) {
-					firstDeparture = departure;
-				}
-				mDeparturesAdapter.add(departure);
-			}
-			needsBetterAccuracy = true;
 		}
 		mDeparturesAdapter.notifyDataSetChanged();
 		requestScheduleIfNecessary();
@@ -385,15 +436,19 @@ public class ViewDeparturesActivity extends SherlockListActivity {
 	}
 
 	private void requestScheduleIfNecessary() {
+		// Bail if there's nothing to match schedules to
 		if (mDeparturesAdapter.getCount() == 0) {
 			return;
 		}
 
+		// Fetch if we don't have anything at all
 		if (mLatestScheduleInfo == null) {
 			fetchLatestSchedule();
 			return;
 		}
 
+		// Otherwise, check if the latest departure doesn't have schedule
+		// info... if not, fetch
 		Departure lastDeparture = mDeparturesAdapter.getItem(mDeparturesAdapter
 				.getCount() - 1);
 		if (mLatestScheduleInfo.getLatestDepartureTime() < lastDeparture
@@ -424,6 +479,7 @@ public class ViewDeparturesActivity extends SherlockListActivity {
 			}
 		}
 
+		// Match scheduled departures with real time departures in adapter
 		int lastSearchIndex = 0;
 		int tripCount = mLatestScheduleInfo.getTrips().size();
 		boolean departureUpdated = false;
@@ -433,6 +489,7 @@ public class ViewDeparturesActivity extends SherlockListActivity {
 			Departure departure = mDeparturesAdapter.getItem(departureIndex);
 			for (int i = lastSearchIndex; i < tripCount; i++) {
 				ScheduleItem trip = mLatestScheduleInfo.getTrips().get(i);
+				// Definitely not a match if they have different destinations
 				if (!departure.getDestination().abbreviation.equals(trip
 						.getTrainHeadStation())) {
 					continue;
@@ -478,17 +535,21 @@ public class ViewDeparturesActivity extends SherlockListActivity {
 					break;
 				}
 			}
+
 			// Don't estimate for non-scheduled transfers
 			if (!departure.getRequiresTransfer()) {
 				if (!departure.hasEstimatedTripTime() && localAverageLength > 0) {
+					// Use the average we just calculated if available
 					departure.setEstimatedTripTime(localAverageLength);
 				} else if (!departure.hasEstimatedTripTime()) {
+					// Otherwise just assume the global average
 					departure.setEstimatedTripTime(mAverageTripLength);
 				}
 			} else if (departure.getRequiresTransfer()
 					&& !departure.hasAnyArrivalEstimate()) {
 				lastUnestimatedTransfer = departure;
 			}
+			
 			if (!departure.hasAnyArrivalEstimate()) {
 				departuresWithoutEstimates++;
 			}
@@ -515,6 +576,7 @@ public class ViewDeparturesActivity extends SherlockListActivity {
 			getContentResolver().update(mUri, contentValues, null, null);
 		}
 
+		// If we still have some departures without estimates, try again later
 		if (departuresWithoutEstimates > 0) {
 			scheduleScheduleInfoFetch(20000);
 		}
@@ -618,7 +680,7 @@ public class ViewDeparturesActivity extends SherlockListActivity {
 				+ " " + departure.getUncertaintyText());
 		departureCountdown.setTextProvider(new TextProvider() {
 			@Override
-			public String getText() {
+			public String getText(long tickNumber) {
 				if (departure.hasDeparted()) {
 					return "Departed";
 				} else {
@@ -632,22 +694,13 @@ public class ViewDeparturesActivity extends SherlockListActivity {
 				.getEstimatedArrivalMinutesLeftText(this));
 		arrivalCountdown.setTextProvider(new TextProvider() {
 			@Override
-			public String getText() {
+			public String getText(long tickNumber) {
 				return departure
 						.getEstimatedArrivalMinutesLeftText(ViewDeparturesActivity.this);
 			}
 		});
 	}
 
-	@Override
-	protected void onListItemClick(ListView l, View v, int position, long id) {
-		mSelectedDeparture = (Departure) getListAdapter().getItem(position);
-		if (mActionMode != null) {
-			mActionMode.finish();
-		}
-		startDepartureActionMode();
-	}
-
 	private void startDepartureActionMode() {
 		mActionMode = startActionMode(new DepartureActionMode());
 		mActionMode.setTitle(mSelectedDeparture.getDestinationName());
@@ -672,6 +725,13 @@ public class ViewDeparturesActivity extends SherlockListActivity {
 			if (item.getItemId() == R.id.boardTrain) {
 				mBoardedDeparture = mSelectedDeparture;
 				refreshBoardedDeparture();
+
+				// Don't prompt for alert if train is about to leave
+				if (mBoardedDeparture.getMeanSecondsLeft() / 60 > 1) {
+					new TrainAlertDialogFragment(mBoardedDeparture).show(
+							getSupportFragmentManager(), "dialog");
+				}
+
 				mode.finish();
 				return true;
 			}

src/com/dougkeen/bart/controls/CountdownTextView.java

@@ -50,8 +50,8 @@ public class CountdownTextView extends TextView implements
 	}
 
 	@Override
-	public void onTick() {
-		setText(mTextProvider.getText());
+	public void onTick(long tickNumber) {
+		setText(mTextProvider.getText(tickNumber));
 	}
 
 }

src/com/dougkeen/bart/controls/Ticker.java

@@ -4,13 +4,12 @@ import java.util.Iterator;
 import java.util.WeakHashMap;
 
 import android.os.Handler;
-import android.util.Log;
 
 public class Ticker {
 	public static interface TickSubscriber {
 		int getTickInterval();
 
-		void onTick();
+		void onTick(long mTickCount);
 	}
 
 	private static Ticker sInstance;
@@ -54,7 +53,7 @@ public class Ticker {
 				stillHasListeners = true;
 				if (subscriber.getTickInterval() > 0
 						&& mTickCount % subscriber.getTickInterval() == 0)
-					subscriber.onTick();
+					subscriber.onTick(mTickCount);
 			}
 			long endTimeNanos = System.nanoTime();
 

src/com/dougkeen/bart/controls/TimedTextSwitcher.java

@@ -30,8 +30,7 @@ public class TimedTextSwitcher extends TextSwitcher implements
 	}
 
 	private int mTickInterval;
-	private TextProvider[] mTextProviderArray;
-	private int mCurrentIndex = 0;
+	private TextProvider mTextProvider;
 
 	@Override
 	public int getTickInterval() {
@@ -42,22 +41,21 @@ public class TimedTextSwitcher extends TextSwitcher implements
 		this.mTickInterval = tickInterval;
 	}
 
-	public void setTextProviders(TextProvider[] textProviders) {
-		mTextProviderArray = textProviders;
+	public void setTextProvider(TextProvider textProvider) {
+		mTextProvider = textProvider;
 		Ticker.getInstance().addSubscriber(this);
 	}
 
 	private String mLastText;
 
 	@Override
-	public void onTick() {
-		String text = mTextProviderArray[mCurrentIndex].getText();
+	public void onTick(long tickNumber) {
+		String text = mTextProvider.getText(tickNumber);
 		if (StringUtils.isNotBlank(text)
 				&& !StringUtils.equalsIgnoreCase(text, mLastText)) {
 			mLastText = text;
 			setText(text);
 		}
-		mCurrentIndex = (mCurrentIndex + 1) % mTextProviderArray.length;
 	}
 
 }

src/com/dougkeen/bart/model/Departure.java

@@ -405,7 +405,7 @@ public class Departure implements Parcelable, Comparable<Departure> {
 		if (hasDeparted()) {
 			return "";
 		} else {
-			return "(±" + getUncertaintySeconds() + "s)";
+			return "(±" + getUncertaintySeconds() + "s)";
 		}
 	}
 

src/com/dougkeen/bart/model/TextProvider.java

@@ -2,6 +2,6 @@ package com.dougkeen.bart.model;
 
 public interface TextProvider {
 
-	String getText();
+	String getText(long tickNumber);
 
 }