added some basic timeline functionality

app/widget/timelineview/timelineview.cpp

@@ -50,26 +50,45 @@ TimelineView::TimelineView(QWidget *parent) :
   SetScale(1.0);
 }
 
-void TimelineView::AddClip(ClipBlock *clip)
+void TimelineView::AddBlock(Block *block)
 {
-  TimelineViewClipItem* clip_item = new TimelineViewClipItem();
+  switch (block->type()) {
+  case Block::kClip:
+  {
+    TimelineViewClipItem* clip_item = new TimelineViewClipItem();
+    ClipBlock* clip = static_cast<ClipBlock*>(block);
 
-  // Set up clip with view parameters (clip item will automatically size its rect accordingly)
-  clip_item->SetClip(clip);
-  clip_item->SetScale(scale_);
+    // Set up clip with view parameters (clip item will automatically size its rect accordingly)
+    clip_item->SetClip(clip);
+    clip_item->SetScale(scale_);
 
-  // Add to list of clip items that can be iterated through
-  clip_items_.insert(clip, clip_item);
+    // Add to list of clip items that can be iterated through
+    clip_items_.insert(clip, clip_item);
+
+    // Add item to graphics scene
+    scene_.addItem(clip_item);
+
+    connect(clip, SIGNAL(Refreshed()), this, SLOT(BlockChanged()));
+    break;
+  }
+  case Block::kGap:
+  {
+    clip_items_.insert(block, nullptr);
+    break;
+  }
+  case Block::kEnd:
+    // Do nothing
+    break;
+  }
 
-  // Add item to graphics scene
-  scene_.addItem(clip_item);
 
-  connect(clip, SIGNAL(Refreshed()), this, SLOT(BlockChanged()));
 }
 
-void TimelineView::RemoveClip(ClipBlock *clip)
+void TimelineView::RemoveBlock(Block *block)
 {
-  delete clip_items_[clip];
+  delete clip_items_[block];
+
+  clip_items_.remove(block);
 }
 
 void TimelineView::SetScale(const double &scale)

app/widget/timelineview/timelineview.h

@@ -43,9 +43,9 @@ class TimelineView : public QGraphicsView
 public:
   TimelineView(QWidget* parent);
 
-  void AddClip(ClipBlock* clip);
+  void AddBlock(Block* block);
 
-  void RemoveClip(ClipBlock* clip);
+  void RemoveBlock(Block* block);
 
   void SetScale(const double& scale);
 
@@ -57,7 +57,9 @@ public slots:
   void SetTime(const int64_t time);
 
 signals:
-  void RequestInsertBlock(Block* block, int index);
+  void RequestInsertBlockAtIndex(Block* block, int index);
+
+  void RequestPlaceBlock(Block* block, rational start);
 
 protected:
   virtual void mousePressEvent(QMouseEvent *event) override;

app/widget/timelineview/tool/import.cpp

@@ -83,6 +83,14 @@ void TimelineView::ImportTool::DragEnter(QDragEnterEvent *event)
 void TimelineView::ImportTool::DragMove(QDragMoveEvent *event)
 {
   if (parent()->HasGhosts()) {
+    // Move ghosts to the mouse cursor
+    foreach (TimelineViewGhostItem* ghost, parent()->ghost_items_) {
+      rational time = parent()->ScreenToTime(event->pos().x());
+
+      ghost->SetOut(ghost->Out() - ghost->In() + time);
+      ghost->SetIn(time);
+    }
+
     event->accept();
   } else {
     event->ignore();
@@ -114,7 +122,7 @@ void TimelineView::ImportTool::DragDrop(QDropEvent *event)
 
       // FIXME: If this doesn't have a TimelineOutput node attached, this is a memory leak. Maybe switching nodes to
       //        shared ptrs would be a better idea.
-      emit parent()->RequestInsertBlock(clip, 0);
+      emit parent()->RequestPlaceBlock(clip, ghost->In());
     }
 
     parent()->ClearGhosts();