Save/load active track state in project. Make first audio and video track active by default

src/doc/kdenlivedoc.cpp

@@ -346,10 +346,10 @@ QDomDocument KdenliveDoc::createEmptyDocument(int videotracks, int audiotracks)
         videoTrack.duration = 0;
         tracks.append(videoTrack);
     }
-    return createEmptyDocument(tracks);
+    return createEmptyDocument(tracks, audiotracks);
 }
 
-QDomDocument KdenliveDoc::createEmptyDocument(const QList<TrackInfo> &tracks)
+QDomDocument KdenliveDoc::createEmptyDocument(const QList<TrackInfo> &tracks, int audiotracks)
 {
     // Creating new document
     QDomDocument doc;
@@ -361,12 +361,21 @@ QDomDocument KdenliveDoc::createEmptyDocument(const QList<TrackInfo> &tracks)
     Mlt::Tractor tractor(docProfile);
     Mlt::Producer bk(docProfile, "color:black");
     tractor.insert_track(bk, 0);
+    bool firstVideoTrackFound = false;
     for (int i = 0; i < tracks.count(); ++i) {
         Mlt::Tractor track(docProfile);
         track.set("kdenlive:track_name", tracks.at(i).trackName.toUtf8().constData());
         track.set("kdenlive:trackheight", KdenliveSettings::trackheight());
         if (tracks.at(i).type == AudioTrack) {
             track.set("kdenlive:audio_track", 1);
+            if (i == audiotracks - 1) {
+                // top most audio track, make active by default
+                track.set("kdenlive:timeline_active", 1);
+            }
+        } else if (!firstVideoTrackFound) {
+            firstVideoTrackFound = true;
+            // bottom video track, make active by default
+            track.set("kdenlive:timeline_active", 1);
         }
         if (tracks.at(i).isLocked) {
             track.set("kdenlive:locked_track", 1);

src/doc/kdenlivedoc.h

@@ -189,7 +189,7 @@ private:
 
     /** @brief Creates a new project. */
     QDomDocument createEmptyDocument(int videotracks, int audiotracks);
-    QDomDocument createEmptyDocument(const QList<TrackInfo> &tracks);
+    QDomDocument createEmptyDocument(const QList<TrackInfo> &tracks, int audiotracks);
 
     /** @brief Updates the project folder location entry in the kdenlive file dialogs to point to the current project folder. */
     void updateProjectFolderPlacesEntry();

src/timeline2/model/builders/meltBuilder.cpp

@@ -63,7 +63,7 @@ bool constructTimelineFromMelt(const std::shared_ptr<TimelineItemModel> &timelin
                                  QLatin1String("black_track")};
     bool ok = true;
     qDebug() << "//////////////////////\nTrying to construct" << tractor.count() << "tracks.\n////////////////////////////////";
-    
+
     // Import master track effects
     for (int i = 0; i < tractor.filter_count(); i++) {
         std::unique_ptr<Mlt::Filter> filter(tractor.filter(i));
@@ -71,7 +71,7 @@ bool constructTimelineFromMelt(const std::shared_ptr<TimelineItemModel> &timelin
             timeline->tractor()->attach(*filter.get());
         }
     }
-    
+
     QList <int> videoTracksIndexes;
     // Black track index
     videoTracksIndexes << 0;
@@ -99,6 +99,7 @@ bool constructTimelineFromMelt(const std::shared_ptr<TimelineItemModel> &timelin
             ok = ok && constructTrackFromMelt(timeline, tid, local_tractor, binIdCorresp, undo, redo, audioTrack, progressDialog);
             timeline->setTrackProperty(tid, QStringLiteral("kdenlive:thumbs_format"), track->get("kdenlive:thumbs_format"));
             timeline->setTrackProperty(tid, QStringLiteral("kdenlive:audio_rec"), track->get("kdenlive:audio_rec"));
+            timeline->setTrackProperty(tid, QStringLiteral("kdenlive:timeline_active"), track->get("kdenlive:timeline_active"));
             if (lockState > 0) {
                 timeline->setTrackLockedState(tid, true);
             }
@@ -123,6 +124,7 @@ bool constructTimelineFromMelt(const std::shared_ptr<TimelineItemModel> &timelin
             ok = ok && constructTrackFromMelt(timeline, tid, local_playlist, binIdCorresp, undo, redo, audioTrack, progressDialog);
             timeline->setTrackProperty(tid, QStringLiteral("kdenlive:thumbs_format"), local_playlist.get("kdenlive:thumbs_format"));
             timeline->setTrackProperty(tid, QStringLiteral("kdenlive:audio_rec"), track->get("kdenlive:audio_rec"));
+            timeline->setTrackProperty(tid, QStringLiteral("kdenlive:timeline_active"), track->get("kdenlive:timeline_active"));
             if (lockState > 0) {
                 timeline->setTrackLockedState(tid, true);
             }