implemented track locking in the timeline widget

app/widget/timelinewidget/timelinewidget.cpp

@@ -756,11 +756,16 @@ void TimelineWidget::MoveRubberBandSelect(bool select_links)
   }
 
   foreach (QGraphicsItem* item, new_selected_list) {
-    item->setSelected(true);
+    TimelineViewBlockItem* block_item = static_cast<TimelineViewBlockItem*>(item);
+    if (GetTrackFromReference(block_item->Track())->IsLocked()) {
+      continue;
+    }
+
+    block_item->setSelected(true);
 
     if (select_links) {
       // Select the block's links
-      Block* b = static_cast<TimelineViewBlockItem*>(item)->block();
+      Block* b = block_item->block();
       SetBlockLinksSelected(b, true);
 
       // Add its links to the list

app/widget/timelinewidget/tool/pointer.cpp

@@ -46,7 +46,9 @@ void TimelineWidget::PointerTool::MousePress(TimelineViewMouseEvent *event)
 
   TimelineViewBlockItem* item = GetItemAtScenePos(event->GetCoordinates());
 
-  bool selectable_item = (item != nullptr && item->flags() & QGraphicsItem::ItemIsSelectable);
+  bool selectable_item = (item != nullptr
+      && item->flags() & QGraphicsItem::ItemIsSelectable
+      && !parent()->GetTrackFromReference(item->Track())->IsLocked());
 
   if (selectable_item) {
     // Cache the clip's type for use later

app/widget/timelinewidget/tool/razor.cpp

@@ -59,7 +59,7 @@ void TimelineWidget::RazorTool::MouseRelease(TimelineViewMouseEvent *event)
   foreach (const TrackReference& track_ref, split_tracks_) {
     TrackOutput* track = parent()->GetTrackFromReference(track_ref);
 
-    if (track == nullptr) {
+    if (track == nullptr || track->IsLocked()) {
       continue;
     }
 

app/widget/timelinewidget/trackview/trackviewitem.cpp

@@ -30,10 +30,11 @@ TrackViewItem::TrackViewItem(TrackOutput* track, QWidget *parent) :
   connect(mute_button_, SIGNAL(toggled(bool)), track_, SLOT(SetMuted(bool)));
   layout->addWidget(mute_button_);
 
-  solo_button_ = CreateMSLButton(tr("S"), Qt::yellow);
-  layout->addWidget(solo_button_);
+  /*solo_button_ = CreateMSLButton(tr("S"), Qt::yellow);
+  layout->addWidget(solo_button_);*/
 
   lock_button_ = CreateMSLButton(tr("L"), Qt::gray);
+  connect(lock_button_, SIGNAL(toggled(bool)), track_, SLOT(SetLocked(bool)));
   layout->addWidget(lock_button_);
 
   setMinimumHeight(mute_button_->height());