-void Header::mouseMoveEvent(QMouseEvent *event)
-{
- assert(event);
- mouse_point_ = event->pos();
-
- if (!(event->buttons() & Qt::LeftButton))
- return;
-
- if ((event->pos() - mouse_down_point_).manhattanLength() <
- QApplication::startDragDistance())
- return;
-
- // Check all the drag items share a common owner
- RowItemOwner *item_owner = nullptr;
- for (shared_ptr<RowItem> r : view_)
- if (r->dragging()) {
- if (!item_owner)
- item_owner = r->owner();
- else if(item_owner != r->owner())
- return;
- }
-
- if (!item_owner)
- return;
-
- // Do the drag
- dragging_ = true;
-
- const QPoint delta = event->pos() - mouse_down_point_;
-
- for (std::shared_ptr<RowItem> r : view_)
- if (r->dragging()) {
- r->drag_by(delta);
-
- // Ensure the trace is selected
- r->select();
- }
-
- item_owner->restack_items();
- for (const auto &r : *item_owner)
- r->animate_to_layout_v_offset();
- signals_moved();
-
- update();
-}
-