+void Header::mousePressEvent(QMouseEvent *event)
+{
+ assert(event);
+
+ if (event->button() & Qt::LeftButton) {
+ _mouse_down_point = event->pos();
+
+ // Save the offsets of any signals which will be dragged
+ for (const shared_ptr<RowItem> r : _view)
+ if (r->selected())
+ _drag_row_items.push_back(
+ make_pair(r, r->v_offset()));
+ }
+
+ // Select the signal if it has been clicked
+ const shared_ptr<RowItem> mouse_over_row_item =
+ get_mouse_over_row_item(event->pos());
+ if (mouse_over_row_item) {
+ if (mouse_over_row_item->selected())
+ mouse_over_row_item->select(false);
+ else {
+ mouse_over_row_item->select(true);
+
+ if (~QApplication::keyboardModifiers() &
+ Qt::ControlModifier)
+ _drag_row_items.clear();
+
+ // Add the signal to the drag list
+ if (event->button() & Qt::LeftButton)
+ _drag_row_items.push_back(
+ make_pair(mouse_over_row_item,
+ mouse_over_row_item->v_offset()));
+ }
+ }
+
+ if (~QApplication::keyboardModifiers() & Qt::ControlModifier) {
+ // Unselect all other signals because the Ctrl is not
+ // pressed
+ for (const shared_ptr<RowItem> r : _view)
+ if (r != mouse_over_row_item)
+ r->select(false);
+ }
+
+ selection_changed();
+ update();
+}
+
+void Header::mouseReleaseEvent(QMouseEvent *event)
+{
+ assert(event);
+ if (event->button() == Qt::LeftButton) {
+ if (_dragging)
+ _view.normalize_layout();
+ else
+ {
+ const shared_ptr<RowItem> mouse_over_row_item =
+ get_mouse_over_row_item(event->pos());
+ if (mouse_over_row_item)
+ show_popup(mouse_over_row_item);
+ }
+
+ _dragging = false;
+ _drag_row_items.clear();
+ }
+}
+
+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;
+
+ // Move the signals if we are dragging
+ if (!_drag_row_items.empty())
+ {
+ _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;
+ const int y_snap =
+ ((y + View::SignalSnapGridSize / 2) /
+ View::SignalSnapGridSize) *
+ View::SignalSnapGridSize;
+ row_item->set_v_offset(y_snap);
+
+ // 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_changed()
+{
+ for (shared_ptr<RowItem> r : _view) {
+ assert(r);
+ connect(r.get(), SIGNAL(visibility_changed()),
+ this, SLOT(on_trace_changed()));
+ connect(r.get(), SIGNAL(text_changed()),
+ this, SLOT(on_trace_changed()));
+ connect(r.get(), SIGNAL(colour_changed()),
+ this, SLOT(update()));
+ }
+}
+
+void Header::on_signals_moved()
+{
+ update();
+}
+
+void Header::on_trace_changed()
+{
+ update();
+ geometry_updated();
+}
+