Add ability to pause and resume a slide show.

Change-Id: I5c93cc0b2ad1aa68529ae1e278bd2cb7ad54359d

android/sdremote/AndroidManifest.xml

@@ -37,17 +37,17 @@
 
         </activity>
 
-        <activity
-            android:name=".activity.ComputerConnectionActivity"
-            android:label="@string/title_connection">
-        </activity>
-
         <activity
             android:name=".activity.ComputerCreationActivity"
             android:label="@string/title_creation"
             android:theme="@style/Theme.ImpressRemote.ComputerCreation">
         </activity>
 
+        <activity
+            android:name=".activity.ComputerConnectionActivity"
+            android:label="@string/title_connection">
+        </activity>
+
         <activity
             android:name=".activity.SlideShowActivity"
             android:label="@string/title_slide_show">

android/sdremote/res/layout/fragment_empty_slide.xml

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+              android:orientation="vertical"
+              android:gravity="center"
+              android:padding="@dimen/padding_empty_slide_layout"
+              android:layout_width="match_parent"
+              android:layout_height="match_parent">
+
+    <ImageView
+        android:src="@color/background_slide_empty"
+        android:contentDescription="@string/description_empty_slide"
+        android:layout_weight="4"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"/>
+
+
+    <View
+        android:layout_weight="3"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"/>
+
+</LinearLayout>
+

android/sdremote/res/menu/menu_action_bar_slide_show.xml

@@ -19,6 +19,17 @@
         android:icon="@drawable/ic_action_timer"
         android:showAsAction="ifRoom"/>
 
+    <item
+        android:id="@+id/menu_resume_slide_show"
+        android:title="@string/menu_resume_slide_show"
+        android:icon="@drawable/ic_action_resume"
+        android:showAsAction="always"/>
+
+    <item
+        android:id="@+id/menu_pause_slide_show"
+        android:title="@string/menu_pause_slide_show"
+        android:showAsAction="never"/>
+
     <item
         android:id="@+id/menu_stop_slide_show"
         android:title="@string/menu_stop_slide_show"

android/sdremote/res/values/colors.xml

@@ -5,6 +5,7 @@
     <color name="background_action_bar_divider">#55ffffff</color>
     <color name="background_header">@color/background_action_bar</color>
     <color name="background_slide_index">#7f000000</color>
+    <color name="background_slide_empty">@android:color/black</color>
 
     <color name="stroke_grid_slide">#65000000</color>
     <color name="stroke_pager_slide">#35000000</color>

android/sdremote/res/values/dimens.xml

@@ -14,6 +14,7 @@
     <dimen name="padding_slide_notes">8dp</dimen>
     <dimen name="padding_help">16dp</dimen>
     <dimen name="padding_section_item">8dp</dimen>
+    <dimen name="padding_empty_slide_layout">16dp</dimen>
 
     <dimen name="padding_horizontal_list_item">8dp</dimen>
     <dimen name="padding_horizontal_connection_layout">40dp</dimen>

android/sdremote/res/values/strings.xml

@@ -12,7 +12,7 @@
     <string name="title_requirements">Requirements</string>
     <string name="title_connection">Connection</string>
     <string name="title_creation">Creation</string>
-    <string name="title_slide_show">Slide Show</string>
+    <string name="title_slide_show">Slide show</string>
     <string name="title_timer">Timer</string>
 
     <string name="menu_licenses">Open source licenses</string>
@@ -25,6 +25,8 @@
     <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="menu_pause_slide_show">Pause slide show</string>
+    <string name="menu_resume_slide_show">Resume slide show</string>
 
     <string name="button_cancel">Cancel</string>
     <string name="button_save">Save</string>
@@ -40,6 +42,7 @@
     <string name="message_time_is_up">Time is up!</string>
     <string name="message_search_wifi">Make sure LibreOffice is running on a computer on the same WiFi network.</string>
     <string name="message_search_bluetooth">Make sure LibreOffice is running on a computer with Bluetooth enabled.</string>
+    <string name="message_paused">Paused</string>
 
     <string name="hint_ip_address">IP address</string>
     <string name="hint_name">Name (optional)</string>
@@ -54,6 +57,7 @@
 
     <string name="description_pager_slide">Slide preview</string>
     <string name="description_grid_slide">Slide preview</string>
+    <string name="description_empty_slide">Empty slide</string>
 
     <string name="preferences_volume_keys_actions_title">Volume keys actions</string>
     <string name="preferences_volume_keys_actions_summary">Switch slides and activate animations using volume keys</string>

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

@@ -29,6 +29,7 @@ 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.EmptySlideFragment;
 import org.libreoffice.impressremote.fragment.SlidesGridFragment;
 import org.libreoffice.impressremote.fragment.SlidesPagerFragment;
 import org.libreoffice.impressremote.fragment.TimerEditingDialog;
@@ -40,7 +41,7 @@ import org.libreoffice.impressremote.util.SavedStates;
 
 public class SlideShowActivity extends SherlockFragmentActivity implements ServiceConnection {
     private static enum Mode {
-        PAGER, GRID
+        PAGER, GRID, EMPTY
     }
 
     private Mode mMode;
@@ -85,6 +86,9 @@ public class SlideShowActivity extends SherlockFragmentActivity implements Servi
             case GRID:
                 return SlidesGridFragment.newInstance();
 
+            case EMPTY:
+                return EmptySlideFragment.newInstance();
+
             default:
                 return SlidesPagerFragment.newInstance();
         }
@@ -314,16 +318,26 @@ public class SlideShowActivity extends SherlockFragmentActivity implements Servi
     public boolean onPrepareOptionsMenu(Menu aMenu) {
         MenuItem aSlidesPagerMenuItem = aMenu.findItem(R.id.menu_slides_pager);
         MenuItem aSlidesGridMenuItem = aMenu.findItem(R.id.menu_slides_grid);
+        MenuItem aSlideShowResumeMenuItem = aMenu.findItem(R.id.menu_resume_slide_show);
 
         switch (mMode) {
             case PAGER:
+                setMenuItemsVisibility(aMenu, true);
                 aSlidesPagerMenuItem.setVisible(false);
                 aSlidesGridMenuItem.setVisible(true);
+                aSlideShowResumeMenuItem.setVisible(false);
                 break;
 
             case GRID:
+                setMenuItemsVisibility(aMenu, true);
                 aSlidesPagerMenuItem.setVisible(true);
                 aSlidesGridMenuItem.setVisible(false);
+                aSlideShowResumeMenuItem.setVisible(false);
+                break;
+
+            case EMPTY:
+                setMenuItemsVisibility(aMenu, false);
+                aSlideShowResumeMenuItem.setVisible(true);
                 break;
 
             default:
@@ -333,38 +347,47 @@ public class SlideShowActivity extends SherlockFragmentActivity implements Servi
         return super.onPrepareOptionsMenu(aMenu);
     }
 
+    private void setMenuItemsVisibility(Menu aMenu, boolean aAreItemsVisible) {
+        for (int aItemIndex = 0; aItemIndex < aMenu.size(); aItemIndex++) {
+            aMenu.getItem(aItemIndex).setVisible(aAreItemsVisible);
+        }
+    }
+
     @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;
-
-                setUpFragment();
-                refreshActionBarMenu();
-
+                changeMode(Mode.GRID);
                 return true;
 
             case R.id.menu_slides_pager:
-                mMode = Mode.PAGER;
-
-                setUpFragment();
-                refreshActionBarMenu();
-
+                changeMode(Mode.PAGER);
                 return true;
 
             case R.id.menu_timer:
                 callTimer();
+                return true;
 
+            case R.id.menu_resume_slide_show:
+                changeMode(Mode.PAGER);
+                setUpSlideShowInformation();
+                resumeSlideShow();
+                resumeTimer();
+                return true;
+
+            case R.id.menu_pause_slide_show:
+                changeMode(Mode.EMPTY);
+                setUpSlideShowPausedInformation();
+                pauseSlideShow();
+                pauseTimer();
                 return true;
 
             case R.id.menu_stop_slide_show:
                 stopSlideShow();
-
                 return true;
 
             default:
@@ -376,6 +399,13 @@ public class SlideShowActivity extends SherlockFragmentActivity implements Servi
         finish();
     }
 
+    private void changeMode(Mode aMode) {
+        mMode = aMode;
+
+        setUpFragment();
+        refreshActionBarMenu();
+    }
+
     private void refreshActionBarMenu() {
         supportInvalidateOptionsMenu();
     }
@@ -410,6 +440,25 @@ public class SlideShowActivity extends SherlockFragmentActivity implements Servi
         aTimerDialog.show(getSupportFragmentManager(), TimerSettingDialog.TAG);
     }
 
+    private void resumeSlideShow() {
+        mCommunicationService.getTransmitter().resumePresentation();
+    }
+
+    private void pauseSlideShow() {
+        mCommunicationService.getTransmitter().setUpBlankScreen();
+    }
+
+    private void setUpSlideShowPausedInformation() {
+        ActionBar aActionBar = getSupportActionBar();
+
+        aActionBar.setTitle(R.string.title_slide_show);
+        aActionBar.setSubtitle(R.string.message_paused);
+    }
+
+    private void pauseTimer() {
+        mCommunicationService.getSlideShow().getTimer().pause();
+    }
+
     private void stopSlideShow() {
         mCommunicationService.getTransmitter().stopPresentation();
 

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

@@ -0,0 +1,30 @@
+/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+package org.libreoffice.impressremote.fragment;
+
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+
+import com.actionbarsherlock.app.SherlockFragment;
+import org.libreoffice.impressremote.R;
+
+public class EmptySlideFragment extends SherlockFragment {
+    public static EmptySlideFragment newInstance() {
+        return new EmptySlideFragment();
+    }
+
+    @Override
+    public View onCreateView(LayoutInflater aInflater, ViewGroup aContainer, Bundle aSavedInstance) {
+        return aInflater.inflate(R.layout.fragment_empty_slide, aContainer, false);
+    }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */

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

@@ -69,6 +69,10 @@ public class SlidesPagerFragment extends SherlockFragment implements ServiceConn
     }
 
     private void setUpSlidesPager() {
+        if (!isServiceBound()) {
+            return;
+        }
+
         if (!isAdded()) {
             return;
         }