+void Header::mouseLeftPressEvent(QMouseEvent *event)
+{
+ const bool ctrl_pressed =
+ QApplication::keyboardModifiers() & Qt::ControlModifier;
+
+ // Clear selection if control is not pressed and this item is unselected
+ const shared_ptr<RowItem> mouse_over =
+ get_mouse_over_row_item(event->pos());
+ if (!ctrl_pressed && (!mouse_over || !mouse_over->selected()))
+ for (shared_ptr<RowItem> r : _view)
+ r->select(false);
+
+ // Set the signal selection state if the item has been clicked
+ if (mouse_over) {
+ if (ctrl_pressed)
+ mouse_over->select(!mouse_over->selected());
+ else
+ mouse_over->select(true);
+ }
+
+ // Save the offsets of any signals which will be dragged
+ _mouse_down_point = event->pos();
+ for (const shared_ptr<RowItem> r : _view)
+ if (r->selected())
+ _drag_row_items.push_back(
+ make_pair(r, r->v_offset()));
+
+ selection_changed();
+ update();
+}
+
+void Header::mousePressEvent(QMouseEvent *event)
+{
+ assert(event);
+ if (event->button() & Qt::LeftButton)
+ mouseLeftPressEvent(event);
+}
+
+void Header::mouseLeftReleaseEvent(QMouseEvent *event)
+{
+ assert(event);
+
+ const bool ctrl_pressed =
+ QApplication::keyboardModifiers() & Qt::ControlModifier;
+
+ // Unselect everything if control is not pressed
+ const shared_ptr<RowItem> mouse_over =
+ get_mouse_over_row_item(event->pos());
+
+ if (_dragging)
+ _view.normalize_layout();
+ else
+ {
+ if (!ctrl_pressed) {
+ for (shared_ptr<RowItem> r : _view)
+ if (mouse_over != r)
+ r->select(false);
+
+ if (mouse_over)
+ show_popup(mouse_over);
+ }
+ }
+
+ _dragging = false;
+ _drag_row_items.clear();
+}
+
+void Header::mouseReleaseEvent(QMouseEvent *event)
+{
+ assert(event);
+ if (event->button() & Qt::LeftButton)
+ mouseLeftReleaseEvent(event);
+}
+
+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 the list of dragging items is not empty
+ if (_drag_row_items.empty())
+ return;
+
+ // Check all the drag items share a common owner
+ const shared_ptr<RowItem> first_row_item(
+ _drag_row_items.front().first);
+ for (const auto &r : _drag_row_items) {
+ const shared_ptr<RowItem> row_item(r.first);
+ assert(row_item);
+
+ if (row_item->owner() != first_row_item->owner())
+ return;
+ }
+
+ // Do the drag
+ _dragging = true;
+
+ const int delta = event->pos().y() - _mouse_down_point.y();
+
+ for (auto i = _drag_row_items.begin();
+ i != _drag_row_items.end(); i++) {
+ const std::shared_ptr<RowItem> row_item((*i).first);
+ if (row_item) {
+ const int y = (*i).second + delta;
+ row_item->set_v_offset(y);
+
+ // Ensure the trace is selected
+ row_item->select();
+ }
+ }
+
+ signals_moved();
+
+ update();
+}
+
+void Header::leaveEvent(QEvent*)
+{
+ _mouse_point = QPoint(-1, -1);
+ update();
+}
+
+void Header::contextMenuEvent(QContextMenuEvent *event)
+{
+ const shared_ptr<RowItem> r = get_mouse_over_row_item(_mouse_point);
+ if (!r)
+ return;
+
+ QMenu *const menu = r->create_context_menu(this);
+ if (!menu)
+ return;
+
+ menu->exec(event->globalPos());
+}
+
+void Header::keyPressEvent(QKeyEvent *e)
+{
+ assert(e);
+
+ switch (e->key())
+ {
+ case Qt::Key_Delete:
+ {
+ for (const shared_ptr<RowItem> r : _view)
+ if (r->selected())
+ r->delete_pressed();
+ break;
+ }
+ }
+}
+
+void Header::on_signals_moved()
+{
+ update();
+}
+
+void Header::on_trace_changed()
+{
+ update();
+ geometry_updated();
+}
+