Fix videos being play/paused after a manual stop

When a video is first loaded (placed on the scene), we play/pause it to
load the first frame; but this was also called when the video was
manually stopped. To avoid this, a mStopped attribute was added to
UBGraphicsMediaItem. It is set to true only when the video is stopped by
the user.

src/domain/UBGraphicsMediaItem.cpp

@@ -65,6 +65,7 @@ UBGraphicsMediaItem::UBGraphicsMediaItem(const QUrl& pMediaFileUrl, QGraphicsIte
         : QGraphicsRectItem(parent)
         , mMuted(sIsMutedByDefault)
         , mMutedByUserAction(sIsMutedByDefault)
+        , mStopped(false)
         , mMediaFileUrl(pMediaFileUrl)
         , mLinkedImage(NULL)
         , mInitialPos(0)
@@ -200,6 +201,14 @@ QMediaPlayer::State UBGraphicsMediaItem::playerState() const
     return mMediaObject->state();
 }
 
+/**
+ * @brief Returns true if the video was manually stopped, false otherwise.
+ */
+bool UBGraphicsMediaItem::isStopped() const
+{
+    return mStopped;
+}
+
 qint64 UBGraphicsMediaItem::mediaDuration() const
 {
     return mMediaObject->duration();
@@ -320,16 +329,20 @@ void UBGraphicsMediaItem::showOnDisplayChanged(bool shown)
 void UBGraphicsMediaItem::play()
 {
     mMediaObject->play();
+    mStopped = false;
 }
 
 void UBGraphicsMediaItem::pause()
 {
     mMediaObject->pause();
+    mStopped = false;
 }
 
 void UBGraphicsMediaItem::stop()
 {
+    qDebug() << "stop requested";
     mMediaObject->stop();
+    mStopped = true;
 }
 
 void UBGraphicsMediaItem::togglePlayPause()

src/domain/UBGraphicsMediaItem.h

@@ -85,6 +85,7 @@ public:
     QMediaPlayer::State playerState() const;
     bool isPlaying() const { return (mMediaObject->state() == QMediaPlayer::PlayingState); }
     bool isPaused() const { return (mMediaObject->state() == QMediaPlayer::PausedState); }
+    bool isStopped() const;
 
     QRectF boundingRect() const;
 
@@ -135,6 +136,7 @@ protected:
     bool mMuted;
     bool mMutedByUserAction;
     static bool sIsMutedByDefault;
+    bool mStopped;
 
     QUrl mMediaFileUrl;
     QString mMediaSource;

src/domain/UBGraphicsMediaItemDelegate.cpp

@@ -242,7 +242,8 @@ void UBGraphicsMediaItemDelegate::mediaStatusChanged(QMediaPlayer::MediaStatus s
 
     // At the beginning of the video, play/pause to load and display the first frame
     if ((status == QMediaPlayer::LoadedMedia || status == QMediaPlayer::BufferedMedia)
-            && delegated()->mediaPosition() == delegated()->initialPos()) {
+            && delegated()->mediaPosition() == delegated()->initialPos()
+            && !delegated()->isStopped()) {
         delegated()->play();
         delegated()->pause();
     }