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549 lines (414 loc) · 15.2 KB
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#include "DataFlowGraphModel.hpp"
#include "ConnectionIdHash.hpp"
#include <QJsonArray>
#include <stdexcept>
namespace QtNodes {
DataFlowGraphModel::DataFlowGraphModel(std::shared_ptr<NodeDelegateModelRegistry> registry)
: _registry(std::move(registry))
, _nextNodeId{0}
{}
std::unordered_set<NodeId> DataFlowGraphModel::allNodeIds() const
{
std::unordered_set<NodeId> nodeIds;
for_each(_models.begin(), _models.end(), [&nodeIds](auto const &p) { nodeIds.insert(p.first); });
return nodeIds;
}
bool DataFlowGraphModel::is(CtlOption ctl) {
Q_UNUSED(ctl);
return false;
}
std::unordered_set<ConnectionId> DataFlowGraphModel::allConnectionIds(NodeId const nodeId) const
{
std::unordered_set<ConnectionId> result;
std::copy_if(_connectivity.begin(),
_connectivity.end(),
std::inserter(result, std::end(result)),
[&nodeId](ConnectionId const &cid) {
return cid.inNodeId == nodeId || cid.outNodeId == nodeId;
});
return result;
}
std::unordered_set<ConnectionId> DataFlowGraphModel::connections(NodeId nodeId,
PortType portType,
PortIndex portIndex) const
{
std::unordered_set<ConnectionId> result;
std::copy_if(_connectivity.begin(),
_connectivity.end(),
std::inserter(result, std::end(result)),
[&portType, &portIndex, &nodeId](ConnectionId const &cid) {
return (getNodeId(portType, cid) == nodeId
&& getPortIndex(portType, cid) == portIndex);
});
return result;
}
bool DataFlowGraphModel::connectionExists(ConnectionId const connectionId) const
{
return (_connectivity.find(connectionId) != _connectivity.end());
}
NodeId DataFlowGraphModel::addNode(QString const nodeType)
{
std::unique_ptr<NodeDelegateModel> model = _registry->create(nodeType);
if (model) {
NodeId newId = newNodeId();
connect(model.get(),
&NodeDelegateModel::dataUpdated,
[newId, this](PortIndex const portIndex) {
onOutPortDataUpdated(newId, portIndex);
});
connect(model.get(),
&NodeDelegateModel::portsAboutToBeDeleted,
this,
[newId, this](PortType const portType, PortIndex const first, PortIndex const last) {
portsAboutToBeDeleted(newId, portType, first, last);
});
connect(model.get(),
&NodeDelegateModel::portsDeleted,
this,
&DataFlowGraphModel::portsDeleted);
connect(model.get(),
&NodeDelegateModel::portsAboutToBeInserted,
this,
[newId, this](PortType const portType, PortIndex const first, PortIndex const last) {
portsAboutToBeInserted(newId, portType, first, last);
});
connect(model.get(),
&NodeDelegateModel::portsInserted,
this,
&DataFlowGraphModel::portsInserted);
_models[newId] = std::move(model);
Q_EMIT nodeCreated(newId);
return newId;
}
return InvalidNodeId;
}
bool DataFlowGraphModel::connectionPossible(ConnectionId const connectionId) const
{
auto getDataType = [&](PortType const portType) {
return portData(getNodeId(portType, connectionId),
portType,
getPortIndex(portType, connectionId),
PortRole::DataType)
.value<NodeDataType>();
};
auto portVacant = [&](PortType const portType) {
NodeId const nodeId = getNodeId(portType, connectionId);
PortIndex const portIndex = getPortIndex(portType, connectionId);
auto const connected = connections(nodeId, portType, portIndex);
auto policy = portData(nodeId, portType, portIndex, PortRole::ConnectionPolicyRole)
.value<ConnectionPolicy>();
return connected.empty() || (policy == ConnectionPolicy::Many);
};
return getDataType(PortType::Out).id == getDataType(PortType::In).id
&& portVacant(PortType::Out) && portVacant(PortType::In);
}
void DataFlowGraphModel::addConnection(ConnectionId const connectionId)
{
_connectivity.insert(connectionId);
sendConnectionCreation(connectionId);
QVariant const portDataToPropagate = portData(connectionId.outNodeId,
PortType::Out,
connectionId.outPortIndex,
PortRole::Data);
setPortData(connectionId.inNodeId,
PortType::In,
connectionId.inPortIndex,
portDataToPropagate,
PortRole::Data);
}
void DataFlowGraphModel::sendConnectionCreation(ConnectionId const connectionId)
{
Q_EMIT connectionCreated(connectionId);
auto iti = _models.find(connectionId.inNodeId);
auto ito = _models.find(connectionId.outNodeId);
if (iti != _models.end() && ito != _models.end()) {
auto &modeli = iti->second;
auto &modelo = ito->second;
modeli->inputConnectionCreated(connectionId);
modelo->outputConnectionCreated(connectionId);
}
}
void DataFlowGraphModel::sendConnectionDeletion(ConnectionId const connectionId)
{
Q_EMIT connectionDeleted(connectionId);
auto iti = _models.find(connectionId.inNodeId);
auto ito = _models.find(connectionId.outNodeId);
if (iti != _models.end() && ito != _models.end()) {
auto &modeli = iti->second;
auto &modelo = ito->second;
modeli->inputConnectionDeleted(connectionId);
modelo->outputConnectionDeleted(connectionId);
}
}
bool DataFlowGraphModel::nodeExists(NodeId const nodeId) const
{
return (_models.find(nodeId) != _models.end());
}
QVariant DataFlowGraphModel::nodeData(NodeId nodeId, NodeRole role) const
{
QVariant result;
auto it = _models.find(nodeId);
if (it == _models.end())
return result;
auto &model = it->second;
switch (role) {
case NodeRole::Type:
result = model->name();
break;
case NodeRole::Position:
result = _nodeGeometryData[nodeId].pos;
break;
case NodeRole::Size:
result = _nodeGeometryData[nodeId].size;
break;
case NodeRole::CaptionVisible:
result = model->captionVisible();
break;
case NodeRole::Caption:
result = model->caption();
break;
case NodeRole::Style: {
auto style = StyleCollection::nodeStyle();
QVariantMap m = style.toJson().toVariantMap();
if (!_styles.empty() && _styles.find(nodeId) != _styles.end()) {
m.insert(QVariantMap{{"NodeStyle",_styles.at(nodeId).get()->toVariantMap()}});
}
result = m;
} break;
case NodeRole::InternalData: {
QJsonObject nodeJson;
nodeJson["internal-data"] = _models.at(nodeId)->save();
result = nodeJson.toVariantMap();
break;
}
case NodeRole::InPortCount:
result = model->nPorts(PortType::In);
break;
case NodeRole::OutPortCount:
result = model->nPorts(PortType::Out);
break;
case NodeRole::Widget: {
auto w = model->embeddedWidget();
result = QVariant::fromValue(w);
} break;
}
return result;
}
NodeFlags DataFlowGraphModel::nodeFlags(NodeId nodeId) const
{
auto it = _models.find(nodeId);
if (it != _models.end() && it->second->resizable())
return NodeFlag::Resizable;
return NodeFlag::NoFlags;
}
bool DataFlowGraphModel::setNodeData(NodeId nodeId, NodeRole role, QVariant value)
{
Q_UNUSED(nodeId);
Q_UNUSED(role);
Q_UNUSED(value);
bool result = false;
switch (role) {
case NodeRole::Type:
break;
case NodeRole::Position: {
_nodeGeometryData[nodeId].pos = value.value<QPointF>();
Q_EMIT nodePositionUpdated(nodeId);
result = true;
} break;
case NodeRole::Size: {
_nodeGeometryData[nodeId].size = value.value<QSize>();
result = true;
} break;
case NodeRole::CaptionVisible:
break;
case NodeRole::Caption:
break;
case NodeRole::Style:
_styles[nodeId] = std::make_shared<QJsonObject>(value.value<QJsonObject>());
break;
case NodeRole::InternalData:
break;
case NodeRole::InPortCount:
break;
case NodeRole::OutPortCount:
break;
case NodeRole::Widget:
break;
}
return result;
}
QVariant DataFlowGraphModel::portData(NodeId nodeId,
PortType portType,
PortIndex portIndex,
PortRole role) const
{
QVariant result;
auto it = _models.find(nodeId);
if (it == _models.end())
return result;
auto &model = it->second;
switch (role) {
case PortRole::Data:
if (portType == PortType::Out)
result = QVariant::fromValue(model->outData(portIndex));
break;
case PortRole::DataType:
result = QVariant::fromValue(model->dataType(portType, portIndex));
break;
case PortRole::ConnectionPolicyRole:
result = QVariant::fromValue(model->portConnectionPolicy(portType, portIndex));
break;
case PortRole::CaptionVisible:
result = model->portCaptionVisible(portType, portIndex);
break;
case PortRole::Caption:
result = model->portCaption(portType, portIndex);
break;
}
return result;
}
bool DataFlowGraphModel::setPortData(
NodeId nodeId, PortType portType, PortIndex portIndex, QVariant const &value, PortRole role)
{
Q_UNUSED(nodeId);
QVariant result;
auto it = _models.find(nodeId);
if (it == _models.end())
return false;
auto &model = it->second;
switch (role) {
case PortRole::Data:
if (portType == PortType::In) {
model->setInData(value.value<std::shared_ptr<NodeData>>(), portIndex);
// Triggers repainting on the scene.
Q_EMIT inPortDataWasSet(nodeId, portType, portIndex);
}
break;
default:
break;
}
return false;
}
bool DataFlowGraphModel::deleteConnection(ConnectionId const connectionId)
{
bool disconnected = false;
auto it = _connectivity.find(connectionId);
if (it != _connectivity.end()) {
disconnected = true;
_connectivity.erase(it);
}
if (disconnected) {
sendConnectionDeletion(connectionId);
propagateEmptyDataTo(getNodeId(PortType::In, connectionId),
getPortIndex(PortType::In, connectionId));
}
return disconnected;
}
bool DataFlowGraphModel::deleteNode(NodeId const nodeId)
{
// Delete connections to this node first.
auto connectionIds = allConnectionIds(nodeId);
for (auto &cId : connectionIds) {
deleteConnection(cId);
}
_nodeGeometryData.erase(nodeId);
_models.erase(nodeId);
if (!_styles.empty() && _styles.find(nodeId) != _styles.end())
_styles.erase(nodeId);
Q_EMIT nodeDeleted(nodeId);
return true;
}
QJsonObject DataFlowGraphModel::saveNode(NodeId const nodeId) const
{
QJsonObject nodeJson;
nodeJson["id"] = static_cast<qint64>(nodeId);
nodeJson["internal-data"] = _models.at(nodeId)->save();
{
QPointF const pos = nodeData(nodeId, NodeRole::Position).value<QPointF>();
QJsonObject posJson;
posJson["x"] = pos.x();
posJson["y"] = pos.y();
nodeJson["position"] = posJson;
}
return nodeJson;
}
QJsonObject DataFlowGraphModel::save() const
{
QJsonObject sceneJson;
QJsonArray nodesJsonArray;
for (auto const nodeId : allNodeIds()) {
nodesJsonArray.append(saveNode(nodeId));
}
sceneJson["nodes"] = nodesJsonArray;
QJsonArray connJsonArray;
for (auto const &cid : _connectivity) {
connJsonArray.append(toJson(cid));
}
sceneJson["connections"] = connJsonArray;
return sceneJson;
}
void DataFlowGraphModel::loadNode(QJsonObject const &nodeJson)
{
// Possibility of the id clash when reading it from json and not generating a
// new value.
// 1. When restoring a scene from a file.
// Conflict is not possible because the scene must be cleared by the time of
// loading.
// 2. When undoing the deletion command. Conflict is not possible
// because all the new ids were created past the removed nodes.
NodeId restoredNodeId = nodeJson["id"].toInt();
_nextNodeId = std::max(_nextNodeId, restoredNodeId + 1);
QJsonObject const internalDataJson = nodeJson["internal-data"].toObject();
QString delegateModelName = internalDataJson["model-name"].toString();
std::unique_ptr<NodeDelegateModel> model = _registry->create(delegateModelName);
if (model) {
connect(model.get(),
&NodeDelegateModel::dataUpdated,
[restoredNodeId, this](PortIndex const portIndex) {
onOutPortDataUpdated(restoredNodeId, portIndex);
});
_models[restoredNodeId] = std::move(model);
Q_EMIT nodeCreated(restoredNodeId);
QJsonObject posJson = nodeJson["position"].toObject();
QPointF const pos(posJson["x"].toDouble(), posJson["y"].toDouble());
setNodeData(restoredNodeId, NodeRole::Position, pos);
if (nodeJson.contains("style")) {
QJsonObject styleJson = nodeJson["style"].toObject();
setNodeData(restoredNodeId, NodeRole::Style, styleJson);
}
_models[restoredNodeId]->load(internalDataJson);
} else {
throw std::logic_error(std::string("No registered model with name ")
+ delegateModelName.toLocal8Bit().data());
}
}
void DataFlowGraphModel::load(QJsonObject const &jsonDocument)
{
QJsonArray nodesJsonArray = jsonDocument["nodes"].toArray();
for (QJsonValueRef nodeJson : nodesJsonArray) {
loadNode(nodeJson.toObject());
}
QJsonArray connectionJsonArray = jsonDocument["connections"].toArray();
for (QJsonValueRef connection : connectionJsonArray) {
QJsonObject connJson = connection.toObject();
ConnectionId connId = fromJson(connJson);
// Restore the connection
addConnection(connId);
}
}
void DataFlowGraphModel::onOutPortDataUpdated(NodeId const nodeId, PortIndex const portIndex)
{
std::unordered_set<ConnectionId> const &connected = connections(nodeId,
PortType::Out,
portIndex);
QVariant const portDataToPropagate = portData(nodeId, PortType::Out, portIndex, PortRole::Data);
for (auto const &cn : connected) {
setPortData(cn.inNodeId, PortType::In, cn.inPortIndex, portDataToPropagate, PortRole::Data);
}
}
void DataFlowGraphModel::propagateEmptyDataTo(NodeId const nodeId, PortIndex const portIndex)
{
QVariant emptyData{};
setPortData(nodeId, PortType::In, portIndex, emptyData, PortRole::Data);
}
} // namespace QtNodes
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