Rename track should trigger undo/redo command and update multitrack view.

Fixes #600

src/timeline2/model/timelineitemmodel.cpp

@@ -430,6 +430,25 @@ QVariant TimelineItemModel::data(const QModelIndex &index, int role) const
     return QVariant();
 }
 
+void TimelineItemModel::setTrackName(int trackId, const QString &text)
+{
+    QWriteLocker locker(&m_lock);
+    const QString &currentName = getTrackProperty(trackId, QStringLiteral("kdenlive:track_name")).toString();
+    if (text == currentName) {
+        return;
+    }
+    Fun undo_lambda = [this, trackId, currentName]() {
+        setTrackProperty(trackId, QStringLiteral("kdenlive:track_name"), currentName);
+        return true;
+    };
+    Fun redo_lambda = [this, trackId, text]() {
+        setTrackProperty(trackId, QStringLiteral("kdenlive:track_name"), text);
+        return true;
+    };
+    redo_lambda();
+    PUSH_UNDO(undo_lambda, redo_lambda, i18n("Edit item"));
+}
+
 void TimelineItemModel::setTrackProperty(int trackId, const QString &name, const QString &value)
 {
     std::shared_ptr<TrackModel> track = getTrackById(trackId);
@@ -438,6 +457,9 @@ void TimelineItemModel::setTrackProperty(int trackId, const QString &name, const
     bool updateMultiTrack = false;
     if (name == QLatin1String("kdenlive:track_name")) {
         roles.push_back(NameRole);
+        if (!track->isAudioTrack()) {
+            updateMultiTrack = true;
+        }
     } else if (name == QLatin1String("kdenlive:locked_track")) {
         roles.push_back(IsLockedRole);
     } else if (name == QLatin1String("hide")) {

src/timeline2/model/timelineitemmodel.hpp

@@ -83,6 +83,11 @@ public:
     /* @brief Enabled/disabled a track's effect stack */
     Q_INVOKABLE void setTrackStackEnabled(int tid, bool enable);
     Q_INVOKABLE QVariant getTrackProperty(int tid, const QString &name) const;
+    /* @brief Sets a track name
+       @param trackId is of the track to alter
+       @param text is the new track name.
+    */
+    Q_INVOKABLE void setTrackName(int trackId, const QString &text);
     /** @brief returns the lower video track index in timeline.
      **/
     int getFirstVideoTrackIndex() const;

src/timeline2/view/qml/TrackHead.qml

@@ -472,7 +472,7 @@ Rectangle {
                         }
                     }*/
                     onEditingFinished: {
-                        controller.setTrackProperty(trackId, "kdenlive:track_name", text)
+                        controller.setTrackName(trackId, text)
                         visible = false
                     }
                 }