Add timer support.

Show the timer as a dialog, plus update all following information as it
should be.

Change-Id: Idae00b009ce098cfd482ec79629fc8f674502c9a

android/sdremote/res/menu/menu_action_bar_slide_show.xml

@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <item
+        android:id="@+id/menu_slides_pager"
+        android:title="@string/menu_slides_pager"
+        android:icon="@drawable/ic_action_pager"
+        android:showAsAction="always"/>
+
+    <item
+        android:id="@+id/menu_slides_grid"
+        android:title="@string/menu_slides_grid"
+        android:icon="@drawable/ic_action_grid"
+        android:showAsAction="always"/>
+
+    <item
+        android:id="@+id/menu_timer"
+        android:title="@string/menu_timer"
+        android:icon="@drawable/ic_action_timer"
+        android:showAsAction="ifRoom"/>
+
+    <item
+        android:id="@+id/menu_stop_slide_show"
+        android:title="@string/menu_stop_slide_show"
+        android:showAsAction="never"/>
+
+</menu>

android/sdremote/res/menu/menu_action_bar_slide_show_grid.xml

@@ -1,10 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<menu xmlns:android="http://schemas.android.com/apk/res/android">
-
-    <item
-        android:id="@+id/menu_slides_pager"
-        android:title="@string/menu_slides_pager"
-        android:icon="@drawable/ic_action_pager"
-        android:showAsAction="always"/>
-
-</menu>

android/sdremote/res/menu/menu_action_bar_slide_show_pager.xml

@@ -1,10 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<menu xmlns:android="http://schemas.android.com/apk/res/android">
-
-    <item
-        android:id="@+id/menu_slides_grid"
-        android:title="@string/menu_slides_grid"
-        android:icon="@drawable/ic_action_grid"
-        android:showAsAction="always"/>
-
-</menu>

android/sdremote/res/values/strings.xml

@@ -10,6 +10,7 @@
     <string name="title_connection">Connection</string>
     <string name="title_creation">Creation</string>
     <string name="title_slide_show">Slide Show</string>
+    <string name="title_timer">Timer</string>
 
     <string name="menu_licenses">Open source licenses</string>
     <string name="menu_reconnect">Reconnect</string>
@@ -17,9 +18,13 @@
     <string name="menu_remove_computer">Remove</string>
     <string name="menu_slides_grid">Slides grid</string>
     <string name="menu_slides_pager">Slides pager</string>
+    <string name="menu_timer">Timer</string>
+    <string name="menu_stop_slide_show">Stop slide show</string>
 
     <string name="button_cancel">Cancel</string>
     <string name="button_save">Save</string>
+    <string name="button_start">Start</string>
+    <string name="button_reset">Reset</string>
 
     <string name="message_impress_pin_validation">Go to “Slide Show → Impress Remote” in LibreOffice Impress and enter the code.</string>
     <string name="message_connection_failed_title">Connection failed</string>
@@ -28,6 +33,7 @@
     <string name="message_impress_pairing_check">If you have Bluetooth pairing issues check instructions related to your desktop OS.</string>
     <string name="message_ip_address_validation">You should type a valid IP address.</string>
     <string name="message_name_notice">Name is optional — IP address would be used instead if you wish.</string>
+    <string name="message_time_is_up">Time is up</string>
 
     <string name="hint_ip_address">IP address</string>
     <string name="hint_name">Name</string>
@@ -35,5 +41,9 @@
     <string name="header_notes">Notes</string>
 
     <string name="mask_slide_show_progress">Slide %1$d from %2$d</string>
+    <plurals name="mask_timer_progress">
+        <item quantity="one">One minute left</item>
+        <item quantity="other">%d minutes left</item>
+    </plurals>
 
 </resources>

android/sdremote/res/values/themes.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources xmlns:android="http://schemas.android.com/apk/res/android">
 
-    <style name="Theme.ImpressRemote" parent="Theme.Sherlock.Light.DarkActionBar">
+    <style name="Theme.ImpressRemote" parent="Theme.Sherlock.Light.DarkActionBar.ForceOverflow">
         <item name="android:actionBarStyle">@style/Theme.ImpressRemote.ActionBar</item>
         <item name="actionBarStyle">@style/Theme.ImpressRemote.ActionBar</item>
 

android/sdremote/src/org/libreoffice/impressremote/activity/ComputersActivity.java

@@ -110,7 +110,7 @@ public class ComputersActivity extends SherlockFragmentActivity implements Actio
     private void setUpComputersList() {
         Fragment aComputersFragment = ComputersFragment.newInstance(ComputersFragment.Type.WIFI);
 
-        FragmentOperator.setUpFragment(this, aComputersFragment);
+        FragmentOperator.addFragment(this, aComputersFragment);
     }
 
     @Override

android/sdremote/src/org/libreoffice/impressremote/activity/SlideShowActivity.java

@@ -16,8 +16,8 @@ import android.content.IntentFilter;
 import android.content.ServiceConnection;
 import android.os.Bundle;
 import android.os.IBinder;
+import android.support.v4.app.DialogFragment;
 import android.support.v4.app.Fragment;
-import android.support.v4.app.FragmentTransaction;
 import android.support.v4.content.LocalBroadcastManager;
 
 import com.actionbarsherlock.app.SherlockFragmentActivity;
@@ -26,8 +26,12 @@ import com.actionbarsherlock.view.MenuItem;
 import org.libreoffice.impressremote.R;
 import org.libreoffice.impressremote.communication.CommunicationService;
 import org.libreoffice.impressremote.communication.SlideShow;
+import org.libreoffice.impressremote.communication.Timer;
 import org.libreoffice.impressremote.fragment.SlidesGridFragment;
 import org.libreoffice.impressremote.fragment.SlidesPagerFragment;
+import org.libreoffice.impressremote.fragment.TimerEditingDialog;
+import org.libreoffice.impressremote.fragment.TimerSettingDialog;
+import org.libreoffice.impressremote.util.FragmentOperator;
 import org.libreoffice.impressremote.util.Intents;
 
 public class SlideShowActivity extends SherlockFragmentActivity implements ServiceConnection {
@@ -57,7 +61,7 @@ public class SlideShowActivity extends SherlockFragmentActivity implements Servi
     }
 
     private void setUpFragment() {
-        setUpFragment(buildFragment());
+        FragmentOperator.replaceFragmentAnimated(this, buildFragment());
     }
 
     private Fragment buildFragment() {
@@ -73,15 +77,6 @@ public class SlideShowActivity extends SherlockFragmentActivity implements Servi
         }
     }
 
-    private void setUpFragment(Fragment aFragment) {
-        FragmentTransaction aTransaction = getSupportFragmentManager().beginTransaction();
-        aTransaction.setCustomAnimations(android.R.anim.fade_in, android.R.anim.fade_out);
-
-        aTransaction.replace(android.R.id.content, aFragment);
-
-        aTransaction.commit();
-    }
-
     private void bindService() {
         Intent aIntent = Intents.buildCommunicationServiceIntent(this);
         bindService(aIntent, this, Context.BIND_AUTO_CREATE);
@@ -124,6 +119,30 @@ public class SlideShowActivity extends SherlockFragmentActivity implements Servi
         public void onReceive(Context aContext, Intent aIntent) {
             if (Intents.Actions.SLIDE_CHANGED.equals(aIntent.getAction())) {
                 mSlideShowActivity.setUpSlideShowInformation();
+                return;
+            }
+
+            if (Intents.Actions.TIMER_UPDATED.equals(aIntent.getAction())) {
+                mSlideShowActivity.setUpSlideShowInformation();
+                return;
+            }
+
+            if (Intents.Actions.TIMER_STARTED.equals(aIntent.getAction())) {
+                int aMinutesLength = aIntent.getIntExtra(Intents.Extras.MINUTES, 0);
+                mSlideShowActivity.startTimer(aMinutesLength);
+                return;
+            }
+
+            if (Intents.Actions.TIMER_RESUMED.equals(aIntent.getAction())) {
+                mSlideShowActivity.resumeTimer();
+                return;
+            }
+
+            if (Intents.Actions.TIMER_CHANGED.equals(aIntent.getAction())) {
+                int aMinutesLength = aIntent.getIntExtra(Intents.Extras.MINUTES, 0);
+                mSlideShowActivity.changeTimer(aMinutesLength);
+                mSlideShowActivity.resumeTimer();
+                mSlideShowActivity.setUpSlideShowInformation();
             }
         }
     }
@@ -131,6 +150,10 @@ public class SlideShowActivity extends SherlockFragmentActivity implements Servi
     private IntentFilter buildIntentsReceiverFilter() {
         IntentFilter aIntentFilter = new IntentFilter();
         aIntentFilter.addAction(Intents.Actions.SLIDE_CHANGED);
+        aIntentFilter.addAction(Intents.Actions.TIMER_UPDATED);
+        aIntentFilter.addAction(Intents.Actions.TIMER_STARTED);
+        aIntentFilter.addAction(Intents.Actions.TIMER_RESUMED);
+        aIntentFilter.addAction(Intents.Actions.TIMER_CHANGED);
 
         return aIntentFilter;
     }
@@ -148,6 +171,10 @@ public class SlideShowActivity extends SherlockFragmentActivity implements Servi
         getSupportActionBar().setSubtitle(buildSlideShowTimerProgress());
     }
 
+    private boolean isServiceBound() {
+        return mCommunicationService != null;
+    }
+
     private String buildSlideShowProgress() {
         SlideShow aSlideShow = mCommunicationService.getSlideShow();
 
@@ -158,7 +185,38 @@ public class SlideShowActivity extends SherlockFragmentActivity implements Servi
     }
 
     private String buildSlideShowTimerProgress() {
-        return null;
+        Timer aTimer = mCommunicationService.getSlideShow().getTimer();
+
+        if (!aTimer.isSet()) {
+            return null;
+        }
+
+        if (aTimer.isTimeUp()) {
+            return getString(R.string.message_time_is_up);
+        }
+
+        int aMinutesLeft = aTimer.getMinutesLeft();
+
+        return getResources().getQuantityString(R.plurals.mask_timer_progress, aMinutesLeft, aMinutesLeft);
+    }
+
+    private void startTimer(int aMinutesLength) {
+        Timer aTimer = mCommunicationService.getSlideShow().getTimer();
+
+        aTimer.setMinutesLength(aMinutesLength);
+        aTimer.start();
+
+        setUpSlideShowInformation();
+    }
+
+    private void resumeTimer() {
+        mCommunicationService.getSlideShow().getTimer().resume();
+    }
+
+    private void changeTimer(int aMinutesLength) {
+        Timer aTimer = mCommunicationService.getSlideShow().getTimer();
+
+        aTimer.setMinutesLength(aMinutesLength);
     }
 
     @Override
@@ -170,27 +228,42 @@ public class SlideShowActivity extends SherlockFragmentActivity implements Servi
 
     @Override
     public boolean onCreateOptionsMenu(Menu aMenu) {
-        getSupportMenuInflater().inflate(getActionBarMenuResourceId(), aMenu);
+        getSupportMenuInflater().inflate(R.menu.menu_action_bar_slide_show, aMenu);
 
         return true;
     }
 
-    private int getActionBarMenuResourceId() {
+    @Override
+    public boolean onPrepareOptionsMenu(Menu aMenu) {
+        MenuItem aSlidesPagerMenuItem = aMenu.findItem(R.id.menu_slides_pager);
+        MenuItem aSlidesGridMenuItem = aMenu.findItem(R.id.menu_slides_grid);
+
         switch (mMode) {
             case PAGER:
-                return R.menu.menu_action_bar_slide_show_pager;
+                aSlidesPagerMenuItem.setVisible(false);
+                aSlidesGridMenuItem.setVisible(true);
+                break;
 
             case GRID:
-                return R.menu.menu_action_bar_slide_show_grid;
+                aSlidesPagerMenuItem.setVisible(true);
+                aSlidesGridMenuItem.setVisible(false);
+                break;
 
             default:
-                return R.menu.menu_action_bar_slide_show_pager;
+                break;
         }
+
+        return super.onPrepareOptionsMenu(aMenu);
     }
 
     @Override
     public boolean onOptionsItemSelected(MenuItem aMenuItem) {
         switch (aMenuItem.getItemId()) {
+            case android.R.id.home:
+                navigateUp();
+
+                return true;
+
             case R.id.menu_slides_grid:
                 mMode = Mode.GRID;
 
@@ -207,8 +280,13 @@ public class SlideShowActivity extends SherlockFragmentActivity implements Servi
 
                 return true;
 
-            case android.R.id.home:
-                navigateUp();
+            case R.id.menu_timer:
+                callTimer();
+
+                return true;
+
+            case R.id.menu_stop_slide_show:
+                stopSlideShow();
 
                 return true;
 
@@ -217,11 +295,38 @@ public class SlideShowActivity extends SherlockFragmentActivity implements Servi
         }
     }
 
+    private void navigateUp() {
+        finish();
+    }
+
     private void refreshActionBarMenu() {
         supportInvalidateOptionsMenu();
     }
 
-    private void navigateUp() {
+    private void callTimer() {
+        Timer aTimer = mCommunicationService.getSlideShow().getTimer();
+
+        if (aTimer.isSet()) {
+            int aTimerLength = aTimer.getMinutesLeft();
+
+            DialogFragment aFragment = TimerEditingDialog.newInstance(aTimerLength);
+            aFragment.show(getSupportFragmentManager(), TimerEditingDialog.TAG);
+
+            pauseTimer();
+        }
+        else {
+            DialogFragment aFragment = TimerSettingDialog.newInstance();
+            aFragment.show(getSupportFragmentManager(), TimerSettingDialog.TAG);
+        }
+    }
+
+    private void pauseTimer() {
+        mCommunicationService.getSlideShow().getTimer().pause();
+    }
+
+    private void stopSlideShow() {
+        mCommunicationService.getTransmitter().stopPresentation();
+
         finish();
     }
 
@@ -245,11 +350,17 @@ public class SlideShowActivity extends SherlockFragmentActivity implements Servi
     protected void onDestroy() {
         super.onDestroy();
 
+        stopTimer();
+
         disconnectComputer();
 
         unbindService();
     }
 
+    private void stopTimer() {
+        mCommunicationService.getSlideShow().getTimer().stop();
+    }
+
     private void disconnectComputer() {
         if (!isServiceBound()) {
             return;
@@ -258,10 +369,6 @@ public class SlideShowActivity extends SherlockFragmentActivity implements Servi
         mCommunicationService.disconnect();
     }
 
-    private boolean isServiceBound() {
-        return mCommunicationService != null;
-    }
-
     private void unbindService() {
         if (!isServiceBound()) {
             return;

android/sdremote/src/org/libreoffice/impressremote/communication/CommunicationService.java

@@ -19,7 +19,7 @@ import android.support.v4.content.LocalBroadcastManager;
 
 import org.libreoffice.impressremote.util.Intents;
 
-public class CommunicationService extends Service implements Runnable, MessagesListener {
+public class CommunicationService extends Service implements Runnable, MessagesListener, Timer.TimerListener {
     public static enum State {
         DISCONNECTED, SEARCHING, CONNECTING, CONNECTED
     }
@@ -58,7 +58,7 @@ public class CommunicationService extends Service implements Runnable, MessagesL
 
         mServersManager = new ServersManager(this);
 
-        mSlideShow = new SlideShow();
+        mSlideShow = new SlideShow(new Timer(this));
 
         mThread = new Thread(this);
         mThread.start();
@@ -278,6 +278,12 @@ public class CommunicationService extends Service implements Runnable, MessagesL
         LocalBroadcastManager.getInstance(this).sendBroadcast(aIntent);
     }
 
+    @Override
+    public void onTimerUpdated() {
+        Intent aIntent = Intents.buildTimerUpdatedIntent();
+        LocalBroadcastManager.getInstance(this).sendBroadcast(aIntent);
+    }
+
     @Override
     public void onDestroy() {
         stopSearch();

android/sdremote/src/org/libreoffice/impressremote/communication/SlideShow.java

@@ -20,14 +20,14 @@ public class SlideShow {
 
     private final Timer mTimer;
 
-    public SlideShow() {
+    public SlideShow(Timer aTimer) {
         this.mSlidesCount = 0;
         this.mCurrentSlideIndex = 0;
 
         this.mSlidePreviewsBytes = new SparseArray<byte[]>();
         this.mSlideNotes = new SparseArray<String>();
 
-        this.mTimer = new Timer();
+        this.mTimer = aTimer;
     }
 
     public void setSlidesCount(int aSlidesCount) {

android/sdremote/src/org/libreoffice/impressremote/communication/Timer.java

@@ -8,116 +8,82 @@
  */
 package org.libreoffice.impressremote.communication;
 
-public class Timer {
-    /**
-     * This stores the starting time of the timer if running.
-     * <p/>
-     * If paused this stores how long the timer was previously running.
-     */
-    private long mTime;
-    private long mCountdownTime;
+import java.util.concurrent.TimeUnit;
 
-    private boolean mIsRunning;
-    private boolean mIsCountdown;
+import android.os.Handler;
 
-    public Timer() {
-        mTime = 0;
-        mCountdownTime = 0;
-
-        mIsRunning = false;
-        mIsCountdown = false;
+public class Timer implements Runnable {
+    public interface TimerListener {
+        public void onTimerUpdated();
     }
 
-    /**
-     * Set whether this timer should be a normal or a countdown timer.
-     *
-     * @param aIsCountdown Whether this should be a countdown timer.
-     */
-    public void setCountdown(boolean aIsCountdown) {
-        mIsCountdown = aIsCountdown;
+    private static final long UPDATE_PERIOD_IN_MINUTES = 1;
 
-        if (mIsRunning) {
-            reset();
-        }
+    private final Handler mTimerHandler;
+    private final TimerListener mTimerListener;
+
+    private int mTotalMinutes;
+    private int mPassedMinutes;
+
+    public Timer(TimerListener aTimerListener) {
+        mTimerHandler = new Handler();
+        mTimerListener = aTimerListener;
+
+        mTotalMinutes = 0;
+        mPassedMinutes = 0;
     }
 
-    public boolean isCountdown() {
-        return mIsCountdown;
+    public void setMinutesLength(int aLengthInMinutes) {
+        mTotalMinutes = aLengthInMinutes;
     }
 
-    /**
-     * Set the countdown time. Can be set, and isn't lost, whatever mode
-     * the timer is running in.
-     *
-     * @param aCountdownTime The countdown time.
-     */
-    public void setCountdownTime(long aCountdownTime) {
-        mCountdownTime = aCountdownTime;
+    public int getMinutesLength() {
+        return mTotalMinutes;
     }
 
-    public long getCountdownTime() {
-        return mCountdownTime;
-    }
-
-    public boolean isRunning() {
-        return mIsRunning;
-    }
-
-    /**
-     * Reset the timer, and stop it it was running.
-     */
-    public void reset() {
-        mIsRunning = false;
-        mTime = 0;
+    public boolean isSet() {
+        return mTotalMinutes != 0;
     }
 
     public void start() {
-        if (mIsRunning) {
+        if (!isSet()) {
             return;
         }
 
-        mTime = System.currentTimeMillis() - mTime;
-        mIsRunning = true;
+        mTimerHandler.postDelayed(this, TimeUnit.MINUTES.toMillis(UPDATE_PERIOD_IN_MINUTES));
+    }
+
+    @Override
+    public void run() {
+        updatePassedMinutes();
+
+        mTimerListener.onTimerUpdated();
+
+        start();
+    }
+
+    private void updatePassedMinutes() {
+        mPassedMinutes++;
+    }
+
+    public void pause() {
+        stop();
+    }
+
+    public void resume() {
+        start();
     }
 
     public void stop() {
-        if (!mIsRunning)
-            return;
-
-        mTime = System.currentTimeMillis() - mTime;
-        mIsRunning = false;
+        mTimerHandler.removeCallbacks(this);
     }
 
-    /**
-     * Get either how long this timer has been running, or how long the
-     * timer still has left to run.
-     *
-     * @return running time in millis.
-     */
-    public long getTimeMillis() {
-        if (mIsCountdown) {
-            return calculateCountdownRunningTime();
-        }
-
-        return calculateRunningTime();
+    public boolean isTimeUp() {
+        return getMinutesLeft() <= 0;
     }
 
-    private long calculateCountdownRunningTime() {
-        long aRunningTime = mCountdownTime - calculateRunningTime();
-
-        if (aRunningTime < 0) {
-            reset();
-        }
-
-        return aRunningTime;
-    }
-
-    private long calculateRunningTime() {
-        if (mIsRunning) {
-            return System.currentTimeMillis() - mTime;
-        }
-
-        return mTime;
+    public int getMinutesLeft() {
+        return mTotalMinutes - mPassedMinutes;
     }
 }
 

android/sdremote/src/org/libreoffice/impressremote/fragment/TimerEditingDialog.java

@@ -0,0 +1,136 @@
+package org.libreoffice.impressremote.fragment;
+
+import java.util.concurrent.TimeUnit;
+
+import android.app.Dialog;
+import android.app.TimePickerDialog;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.os.Bundle;
+import android.support.v4.content.LocalBroadcastManager;
+import android.view.View;
+import android.widget.TimePicker;
+
+import com.actionbarsherlock.app.SherlockDialogFragment;
+import org.libreoffice.impressremote.R;
+import org.libreoffice.impressremote.util.Intents;
+
+public class TimerEditingDialog extends SherlockDialogFragment implements TimePickerDialog.OnTimeSetListener, DialogInterface.OnClickListener, DialogInterface.OnShowListener, View.OnClickListener {
+    public static final String TAG = "TIMER_EDITING";
+
+    private static final boolean IS_24_HOUR_VIEW = true;
+
+    private int mMinutes;
+
+    public static TimerEditingDialog newInstance(int aMinutes) {
+        TimerEditingDialog aDialog = new TimerEditingDialog();
+
+        aDialog.setArguments(buildArguments(aMinutes));
+
+        return aDialog;
+    }
+
+    private static Bundle buildArguments(int aMinutes) {
+        Bundle aArguments = new Bundle();
+
+        aArguments.putInt("MINUTES", aMinutes);
+
+        return aArguments;
+    }
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        mMinutes = getArguments().getInt("MINUTES");
+    }
+
+    @Override
+    public Dialog onCreateDialog(Bundle aSavedInstanceState) {
+        TimePickerDialog aDialog = new TimePickerDialog(getActivity(), this,
+            getHours(mMinutes), getMinutes(mMinutes), IS_24_HOUR_VIEW);
+
+        aDialog.setTitle(R.string.title_timer);
+
+        aDialog.setButton(DialogInterface.BUTTON_POSITIVE, getString(R.string.button_save), this);
+        aDialog.setButton(DialogInterface.BUTTON_NEGATIVE, getString(R.string.button_cancel), this);
+        aDialog.setButton(DialogInterface.BUTTON_NEUTRAL, getString(R.string.button_reset), this);
+
+        aDialog.setOnShowListener(this);
+
+        return aDialog;
+    }
+
+    private int getMinutes(int aMinutes) {
+        return (int) (aMinutes - getHours(aMinutes) * TimeUnit.HOURS.toMinutes(1));
+    }
+
+    private int getHours(int aMinutes) {
+        return (int) (aMinutes / TimeUnit.HOURS.toMinutes(1));
+    }
+
+    @Override
+    public void onTimeSet(TimePicker aTimePicker, int aHour, int aMinute) {
+        mMinutes = getMinutes(aHour, aMinute);
+    }
+
+    private int getMinutes(int aHours, int aMinutes) {
+        return (int) (TimeUnit.HOURS.toMinutes(aHours) + aMinutes);
+    }
+
+    @Override
+    public void onClick(DialogInterface aDialogInterface, int aButtonId) {
+        getTimePickerDialog().onClick(aDialogInterface, aButtonId);
+
+        switch (aButtonId) {
+            case DialogInterface.BUTTON_NEGATIVE:
+                resumeTimer();
+                break;
+
+            case DialogInterface.BUTTON_POSITIVE:
+                changeTimer();
+                break;
+
+            default:
+                break;
+        }
+    }
+
+    private TimePickerDialog getTimePickerDialog() {
+        return (TimePickerDialog) getDialog();
+    }
+
+    private void resumeTimer() {
+        Intent aIntent = Intents.buildTimerResumedIntent();
+        LocalBroadcastManager.getInstance(getActivity()).sendBroadcast(aIntent);
+    }
+
+    private void changeTimer() {
+        Intent aIntent = Intents.buildTimerChangedIntent(mMinutes);
+        LocalBroadcastManager.getInstance(getActivity()).sendBroadcast(aIntent);
+    }
+
+    @Override
+    public void onShow(DialogInterface dialogInterface) {
+        setUpNeutralButton();
+    }
+
+    private void setUpNeutralButton() {
+        TimePickerDialog aDialog = (TimePickerDialog) getDialog();
+
+        aDialog.getButton(DialogInterface.BUTTON_NEUTRAL).setOnClickListener(this);
+    }
+
+    @Override
+    public void onClick(View aView) {
+        // Requires the additional listener to not close the dialog.
+
+        resetTime();
+    }
+
+    private void resetTime() {
+        TimePickerDialog aDialog = (TimePickerDialog) getDialog();
+
+        aDialog.updateTime(0, 0);
+    }
+}

android/sdremote/src/org/libreoffice/impressremote/fragment/TimerSettingDialog.java

@@ -0,0 +1,72 @@
+package org.libreoffice.impressremote.fragment;
+
+import java.util.concurrent.TimeUnit;
+
+import android.app.Dialog;
+import android.app.TimePickerDialog;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.os.Bundle;
+import android.support.v4.content.LocalBroadcastManager;
+import android.widget.TimePicker;
+
+import com.actionbarsherlock.app.SherlockDialogFragment;
+import org.libreoffice.impressremote.R;
+import org.libreoffice.impressremote.util.Intents;
+
+public class TimerSettingDialog extends SherlockDialogFragment implements TimePickerDialog.OnTimeSetListener, DialogInterface.OnClickListener {
+    public static final String TAG = "TIMER_SETTING";
+
+    private static final int INITIAL_HOUR = 0;
+    private static final int INITIAL_MINUTE = 15;
+
+    private static final boolean IS_24_HOUR_VIEW = true;
+
+    private int mMinutes;
+
+    public static TimerSettingDialog newInstance() {
+        return new TimerSettingDialog();
+    }
+
+    @Override
+    public Dialog onCreateDialog(Bundle aSavedInstanceState) {
+        TimePickerDialog aDialog = new TimePickerDialog(getActivity(), this,
+            INITIAL_HOUR, INITIAL_MINUTE, IS_24_HOUR_VIEW);
+
+        aDialog.setTitle(R.string.title_timer);
+
+        aDialog.setButton(DialogInterface.BUTTON_POSITIVE, getString(R.string.button_start), this);
+        aDialog.setButton(DialogInterface.BUTTON_NEGATIVE, getString(R.string.button_cancel), this);
+
+        return aDialog;
+    }
+
+    @Override
+    public void onTimeSet(TimePicker aTimePicker, int aHour, int aMinute) {
+        mMinutes = getMinutes(aHour, aMinute);
+    }
+
+    private int getMinutes(int aHours, int aMinutes) {
+        return (int) (TimeUnit.HOURS.toMinutes(aHours) + aMinutes);
+    }
+
+    @Override
+    public void onClick(DialogInterface aDialogInterface, int aButtonId) {
+        getTimePickerDialog().onClick(aDialogInterface, aButtonId);
+
+        if (aButtonId != DialogInterface.BUTTON_POSITIVE) {
+            return;
+        }
+
+        startTimer();
+    }
+
+    private TimePickerDialog getTimePickerDialog() {
+        return (TimePickerDialog) getDialog();
+    }
+
+    private void startTimer() {
+        Intent aIntent = Intents.buildTimerStartedIntent(mMinutes);
+        LocalBroadcastManager.getInstance(getActivity()).sendBroadcast(aIntent);
+    }
+}

android/sdremote/src/org/libreoffice/impressremote/util/FragmentOperator.java

@@ -17,25 +17,35 @@ public final class FragmentOperator {
     private FragmentOperator() {
     }
 
-    public static void setUpFragment(FragmentActivity aActivity, Fragment aFragment) {
-        if (isFragmentSetUp(aActivity)) {
+    public static void addFragment(FragmentActivity aActivity, Fragment aFragment) {
+        if (isFragmentAdded(aActivity)) {
             return;
         }
 
-        installFragment(aActivity, aFragment);
+        FragmentTransaction aFragmentTransaction = beginFragmentTransaction(aActivity);
+
+        aFragmentTransaction.add(android.R.id.content, aFragment);
+
+        aFragmentTransaction.commit();
     }
 
-    private static boolean isFragmentSetUp(FragmentActivity aActivity) {
+    private static boolean isFragmentAdded(FragmentActivity aActivity) {
         FragmentManager aFragmentManager = aActivity.getSupportFragmentManager();
 
         return aFragmentManager.findFragmentById(android.R.id.content) != null;
     }
 
-    private static void installFragment(FragmentActivity aActivity, Fragment aFragment) {
+    private static FragmentTransaction beginFragmentTransaction(FragmentActivity aActivity) {
         FragmentManager aFragmentManager = aActivity.getSupportFragmentManager();
-        FragmentTransaction aFragmentTransaction = aFragmentManager.beginTransaction();
 
-        aFragmentTransaction.add(android.R.id.content, aFragment);
+        return aFragmentManager.beginTransaction();
+    }
+
+    public static void replaceFragmentAnimated(FragmentActivity aActivity, Fragment aFragment) {
+        FragmentTransaction aFragmentTransaction = beginFragmentTransaction(aActivity);
+        aFragmentTransaction.setCustomAnimations(android.R.anim.fade_in, android.R.anim.fade_out);
+
+        aFragmentTransaction.replace(android.R.id.content, aFragment);
 
         aFragmentTransaction.commit();
     }

android/sdremote/src/org/libreoffice/impressremote/util/Intents.java

@@ -39,6 +39,11 @@ public final class Intents {
         public static final String SLIDE_CHANGED = "SLIDE_CHANGED";
         public static final String SLIDE_PREVIEW = "SLIDE_PREVIEW";
         public static final String SLIDE_NOTES = "SLIDE_NOTES";
+
+        public static final String TIMER_UPDATED = "TIMER_UPDATED";
+        public static final String TIMER_STARTED = "TIMER_STARTED";
+        public static final String TIMER_RESUMED = "TIMER_RESUMED";
+        public static final String TIMER_CHANGED = "TIMER_CHANGED";
     }
 
     public static final class Extras {
@@ -52,6 +57,8 @@ public final class Intents {
         public static final String SERVER_NAME = "SERVER_NAME";
 
         public static final String SLIDE_INDEX = "SLIDE_INDEX";
+
+        public static final String MINUTES = "MINUTES";
     }
 
     public static final class RequestCodes {
@@ -139,6 +146,28 @@ public final class Intents {
     public static Intent buildCommunicationServiceIntent(Context aContext) {
         return new Intent(aContext, CommunicationService.class);
     }
+
+    public static Intent buildTimerUpdatedIntent() {
+        return new Intent(Actions.TIMER_UPDATED);
+    }
+
+    public static Intent buildTimerStartedIntent(int aMinutesLength) {
+        Intent aIntent = new Intent(Actions.TIMER_STARTED);
+        aIntent.putExtra(Extras.MINUTES, aMinutesLength);
+
+        return aIntent;
+    }
+
+    public static Intent buildTimerResumedIntent() {
+        return new Intent(Actions.TIMER_RESUMED);
+    }
+
+    public static Intent buildTimerChangedIntent(int aMinutesLength) {
+        Intent aIntent = new Intent(Actions.TIMER_CHANGED);
+        aIntent.putExtra(Extras.MINUTES, aMinutesLength);
+
+        return aIntent;
+    }
 }
 
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