wrote some clip drawing on timeline functions

app/widget/timelineview/timelineview.cpp

@@ -6,6 +6,8 @@ TimelineView::TimelineView(QWidget *parent) :
   QGraphicsView(parent)
 {
   setScene(&scene_);
+  setAlignment(Qt::AlignLeft | Qt::AlignVCenter);
+  setDragMode(RubberBandDrag);
 }
 
 void TimelineView::AddClip(ClipBlock *clip)
@@ -15,7 +17,9 @@ void TimelineView::AddClip(ClipBlock *clip)
   scene_.addItem(clip_item);
 
   // FIXME: Test code only
-  clip_item->setRect(clip->in().ToDouble(), 0, clip->out().ToDouble(), 100);
+  double framerate = timebase_.ToDouble();
+  double clip_item_x = clip->in().ToDouble() / framerate;
+  clip_item->setRect(clip_item_x, 0, clip->out().ToDouble() / framerate - clip_item_x - 1, 100);
   // End test code
 }
 
@@ -24,6 +28,11 @@ void TimelineView::SetScale(const double &scale)
   scale_ = scale;
 }
 
+void TimelineView::SetTimebase(const rational &timebase)
+{
+  timebase_ = timebase;
+}
+
 void TimelineView::Clear()
 {
   scene_.clear();