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;
}
}
}
bool GraphDraw::tryToMakeConnection(const GraphConnectionEndpoint &thisEp)
{
QPointer<GraphConnection> conn;
const auto &lastEp = _lastClickSelectEp;
//valid keys, attempt to make a connection when the endpoints differ in direction
if (thisEp.isValid() and lastEp.isValid() and //both are valid
lastEp.getKey().isInput() != thisEp.getKey().isInput()) //directions differ
{
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)
{
static auto &logger = Poco::Logger::get("PothosFlow.GraphDraw");
logger.warning("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 regardless of failure
_lastClickSelectEp = GraphConnectionEndpoint();
this->deselectAllObjs();
}
//if this is a signal or slot connection
//open the properties panel for configuration
if (conn and conn->isSignalOrSlot())
{
emit this->modifyProperties(conn);
}
return bool(conn);
}