Add an option to restart playback when starting.

Fixes issue 359.

src/ui/behavioursettingspage.cpp

@@ -99,6 +99,7 @@ void BehaviourSettingsPage::Load() {
     case MainWindow::Startup_AlwaysShow: ui_->b_always_show_->setChecked(true); break;
     case MainWindow::Startup_Remember:   ui_->b_remember_->setChecked(true);    break;
   }
+  ui_->resume_after_start_->setChecked(s.value("resume_playback_after_start", false).toBool());
   s.endGroup();
 
   s.beginGroup("General");
@@ -136,6 +137,7 @@ void BehaviourSettingsPage::Save() {
   s.setValue("doubleclick_addmode", doubleclick_addmode);
   s.setValue("doubleclick_playmode", doubleclick_playmode);
   s.setValue("menu_playmode", menu_playmode);
+  s.setValue("resume_playback_after_start", ui_->resume_after_start_->isChecked());
   s.endGroup();
 
   s.beginGroup("General");

src/ui/behavioursettingspage.ui

@@ -102,6 +102,16 @@
         </property>
        </spacer>
       </item>
+      <item>
+       <widget class="QCheckBox" name="resume_after_start_">
+        <property name="text">
+         <string>Resume playback on start</string>
+        </property>
+        <property name="checked">
+         <bool>false</bool>
+        </property>
+       </widget>
+      </item>
       <item>
        <widget class="QCheckBox" name="b_grey_out_deleted_">
         <property name="text">

src/ui/mainwindow.cpp

@@ -192,6 +192,8 @@ MainWindow::MainWindow(Application* app,
     library_sort_model_(new QSortFilterProxyModel(this)),
     track_position_timer_(new QTimer(this)),
     was_maximized_(false),
+    saved_playback_position_(0),
+    saved_playback_state_(Engine::Empty),
     doubleclick_addmode_(AddBehaviour_Append),
     doubleclick_playmode_(PlayBehaviour_IfStopped),
     menu_playmode_(PlayBehaviour_IfStopped)
@@ -754,6 +756,8 @@ MainWindow::MainWindow(Application* app,
 
   CheckFullRescanRevisions();
 
+  LoadPlaybackStatus();
+
   qLog(Debug) << "Started";
 }
 
@@ -963,6 +967,45 @@ void MainWindow::SaveGeometry() {
   settings_.setValue("tab_mode", ui_->tabs->mode());
 }
 
+void MainWindow::SavePlaybackStatus() {
+  QSettings settings;
+  settings.beginGroup(MainWindow::kSettingsGroup);
+  settings.setValue("playback_state", app_->player()->GetState());
+  if (app_->player()->GetState() == Engine::Playing ||
+          app_->player()->GetState() == Engine::Paused) {
+    settings.setValue("playback_position", app_->player()->engine()->position_nanosec() / kNsecPerSec);
+  } else {
+    settings.setValue("playback_position", 0);
+  }
+}
+
+void MainWindow::LoadPlaybackStatus() {
+  QSettings settings;
+  settings.beginGroup(MainWindow::kSettingsGroup);
+  bool resume_playback = settings.value("resume_playback_after_start", false).toBool();
+  saved_playback_state_ = static_cast<Engine::State>
+          (settings.value("playback_state", Engine::Empty).toInt());
+  saved_playback_position_ = settings.value("playback_position", 0).toDouble();
+  if (!resume_playback ||
+        saved_playback_state_ == Engine::Empty ||
+        saved_playback_state_ == Engine::Idle) {
+    return;
+  }
+
+  QTimer::singleShot(100, this, SLOT(ResumePlayback()));
+}
+
+void MainWindow::ResumePlayback() {
+  qLog(Debug) << "Resuming playback";
+  app_->player()->Play();
+
+  app_->player()->SeekTo(saved_playback_position_);
+
+  if (saved_playback_state_ == Engine::Paused) {
+    app_->player()->Pause();
+  }
+}
+
 void MainWindow::PlayIndex(const QModelIndex& index) {
   if (!index.isValid())
     return;
@@ -2098,6 +2141,7 @@ bool MainWindow::winEvent(MSG* msg, long*) {
 #endif // Q_OS_WIN32
 
 void MainWindow::Exit() {
+  SavePlaybackStatus();
   if(app_->player()->engine()->is_fadeout_enabled()) {
     // To shut down the application when fadeout will be finished
     connect(app_->player()->engine(), SIGNAL(FadeoutFinishedSignal()), qApp, SLOT(quit()));

src/ui/mainwindow.h

@@ -238,6 +238,9 @@ class MainWindow : public QMainWindow, public PlatformInterface {
   void ShowSongInfoConfig();
 
   void SaveGeometry();
+  void SavePlaybackStatus();
+  void LoadPlaybackStatus();
+  void ResumePlayback();
 
   void AddSongInfoGenerator(smart_playlists::GeneratorPtr gen);
 
@@ -335,6 +338,8 @@ class MainWindow : public QMainWindow, public PlatformInterface {
   QSettings settings_;
 
   bool was_maximized_;
+  int saved_playback_position_;
+  Engine::State saved_playback_state_;
   AddBehaviour doubleclick_addmode_;
   PlayBehaviour doubleclick_playmode_;
   PlayBehaviour menu_playmode_;