Parallel data updatable to connected nodes

[iamardatasyurek]

Your idea

If used dataUpdated Q_SIGNAL, nodes take data step by step. (node1 taken, node1 calculated, node1 updated, ... , nodeN taken, nodeN calculated, nodeN updated)

This is a problem and it's causing poor performance. Because each node wait before node.

`
void MyNode::onSendData(const QVector &data)
{
_data= std::make_shared<Data>();
_data->data= data;

emit dataUpdated(0); // node1 -> node2 -> ... -> nodeN

}
`

Problem to be solved

I tried solve the problem with QtConcurrent.

`
void MyNode::onSendData(const QVector &data, std::shared_ptrQtNodes::DataFlowGraphModel &graphModel, QtNodes::NodeId &id)
{
_data= std::make_shared<Data>();
_data->data= data;

auto conns = graphModel->connections(id, QtNodes::PortType::Out, 0);
QList<QtNodes::ConnectionId> connList(conns.begin(), conns.end());

QtConcurrent::map(connList, [&](const QtNodes::ConnectionId &conn) {
    auto *node = graphModel->delegateModel<QtNodes::NodeDelegateModel>(conn.inNodeId);
    if (node)
        node->setInData(_data, conn.inPortIndex);
}).waitForFinished();

}
`

Prior art

No response

Additional context

I use QtConcurrent but I am not sure, is it the solution? I listen your all advices.

Checklist

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