GraphConnectionEndpoint GraphDraw::mousedEndpoint(const QPoint &pos)
{
auto objs = this->items(pos);
if (_connectLineItem) objs.removeOne(_connectLineItem.get());
if (objs.empty()) return GraphConnectionEndpoint();
auto topObj = dynamic_cast<GraphObject *>(objs.front());
if (topObj == nullptr) return GraphConnectionEndpoint();
const auto point = topObj->mapFromParent(this->mapToScene(pos));
return GraphConnectionEndpoint(topObj, topObj->isPointingToConnectable(point));
}
void GraphDraw::doClickSelection(const QPointF &point)
{
const bool ctrlDown = QApplication::keyboardModifiers() & Qt::ControlModifier;
const auto objs = this->items(this->mapFromScene(point));
//nothing selected, clear the last selected endpoint
if (objs.empty()) _lastClickSelectEp = GraphConnectionEndpoint();
//connection creation logic
if (not ctrlDown and not objs.empty())
{
auto topObj = dynamic_cast<GraphObject *>(objs.front());
if (topObj == nullptr) return;
GraphConnectionEndpoint thisEp(topObj, topObj->isPointingToConnectable(topObj->mapFromParent(point)));
//valid keys, attempt to make a connection
QPointer<GraphConnection> conn;
if (thisEp.isValid() and _lastClickSelectEp.isValid() and not (thisEp == _lastClickSelectEp) and //end points valid
(_lastClickSelectEp.getConnectableAttrs().direction == GRAPH_CONN_OUTPUT or _lastClickSelectEp.getConnectableAttrs().direction == GRAPH_CONN_SIGNAL) and //last endpoint is output
(thisEp.getConnectableAttrs().direction == GRAPH_CONN_INPUT or thisEp.getConnectableAttrs().direction == GRAPH_CONN_SLOT)) //this click endpoint is input
{
try
{
conn = this->getGraphEditor()->makeConnection(thisEp, _lastClickSelectEp);
this->getGraphEditor()->handleStateChange(GraphState("connect-arrow", tr("Connect %1[%2] to %3[%4]").arg(
conn->getOutputEndpoint().getObj()->getId(),
conn->getOutputEndpoint().getKey().id,
conn->getInputEndpoint().getObj()->getId(),
conn->getInputEndpoint().getKey().id
)));
}
catch (const Pothos::Exception &ex)
{
poco_warning(Poco::Logger::get("PothosGui.GraphDraw.connect"), Poco::format("Cannot connect port %s[%s] to port %s[%s]: %s",
_lastClickSelectEp.getObj()->getId().toStdString(),
_lastClickSelectEp.getKey().id.toStdString(),
thisEp.getObj()->getId().toStdString(),
thisEp.getKey().id.toStdString(),
ex.message()));
}
}
//cleanup after new connection
if (not conn.isNull())
{
_lastClickSelectEp = GraphConnectionEndpoint();
this->deselectAllObjs();
}
//otherwise save the click select
else
{
_lastClickSelectEp = thisEp;
}
}
}
