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DataFlowGraphicsScene.cpp
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308 lines (239 loc) · 9.16 KB
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#include "DataFlowGraphicsScene.hpp"
#include "ConnectionGraphicsObject.hpp"
#include "GraphicsView.hpp"
#include "NodeDelegateModelRegistry.hpp"
#include "NodeGraphicsObject.hpp"
#include "UndoCommands.hpp"
#include <QtWidgets/QFileDialog>
#include <QtWidgets/QGraphicsSceneMoveEvent>
#include <QtWidgets/QHeaderView>
#include <QtWidgets/QLineEdit>
#include <QtWidgets/QTreeWidget>
#include <QtWidgets/QWidgetAction>
#include <QtCore/QBuffer>
#include <QtCore/QByteArray>
#include <QtCore/QDataStream>
#include <QtCore/QDebug>
#include <QtCore/QFile>
#include <QtCore/QJsonArray>
#include <QtCore/QJsonDocument>
#include <QtCore/QJsonObject>
#include <QtCore/QJsonParseError>
#include <QtCore/QJsonValue>
#include <QtCore/QUuid>
#include <QtCore/QtGlobal>
#include <stdexcept>
#include <utility>
#include <vector>
namespace {
using QtNodes::GroupId;
using QtNodes::InvalidGroupId;
GroupId jsonValueToGroupId(QJsonValue const &value)
{
if (value.isDouble()) {
return static_cast<GroupId>(value.toInt());
}
if (value.isString()) {
auto const textValue = value.toString();
bool ok = false;
auto const numericValue = textValue.toULongLong(&ok, 10);
if (ok) {
return static_cast<GroupId>(numericValue);
}
QUuid uuidValue(textValue);
if (!uuidValue.isNull()) {
auto const bytes = uuidValue.toRfc4122();
if (bytes.size() >= static_cast<int>(sizeof(quint32))) {
QDataStream stream(bytes);
quint32 value32 = 0U;
stream >> value32;
return static_cast<GroupId>(value32);
}
}
}
return InvalidGroupId;
}
} // namespace
namespace QtNodes {
DataFlowGraphicsScene::DataFlowGraphicsScene(DataFlowGraphModel &graphModel, QObject *parent)
: BasicGraphicsScene(graphModel, parent)
, _graphModel(graphModel)
{
connect(&_graphModel,
&DataFlowGraphModel::inPortDataWasSet,
[this](NodeId const nodeId, PortType const, PortIndex const) { onNodeUpdated(nodeId); });
}
// TODO constructor for an empyt scene?
std::vector<NodeId> DataFlowGraphicsScene::selectedNodes() const
{
QList<QGraphicsItem *> graphicsItems = selectedItems();
std::vector<NodeId> result;
result.reserve(graphicsItems.size());
for (QGraphicsItem *item : graphicsItems) {
auto ngo = qgraphicsitem_cast<NodeGraphicsObject *>(item);
if (ngo != nullptr) {
result.push_back(ngo->nodeId());
}
}
return result;
}
QMenu *DataFlowGraphicsScene::createSceneMenu(QPointF const scenePos)
{
QMenu *modelMenu = new QMenu();
// Add filterbox to the context menu
auto *txtBox = new QLineEdit(modelMenu);
txtBox->setPlaceholderText(QStringLiteral("Filter"));
txtBox->setClearButtonEnabled(true);
auto *txtBoxAction = new QWidgetAction(modelMenu);
txtBoxAction->setDefaultWidget(txtBox);
// 1.
modelMenu->addAction(txtBoxAction);
// Add result treeview to the context menu
QTreeWidget *treeView = new QTreeWidget(modelMenu);
treeView->header()->close();
auto *treeViewAction = new QWidgetAction(modelMenu);
treeViewAction->setDefaultWidget(treeView);
// 2.
modelMenu->addAction(treeViewAction);
auto registry = _graphModel.dataModelRegistry();
for (auto const &cat : registry->categories()) {
auto item = new QTreeWidgetItem(treeView);
item->setText(0, cat);
item->setFlags(item->flags() & ~Qt::ItemIsSelectable);
}
for (auto const &assoc : registry->registeredModelsCategoryAssociation()) {
QList<QTreeWidgetItem *> parent = treeView->findItems(assoc.second, Qt::MatchExactly);
if (parent.count() <= 0)
continue;
auto item = new QTreeWidgetItem(parent.first());
item->setText(0, assoc.first);
}
treeView->expandAll();
connect(treeView,
&QTreeWidget::itemClicked,
[this, modelMenu, scenePos](QTreeWidgetItem *item, int) {
if (!(item->flags() & (Qt::ItemIsSelectable))) {
return;
}
this->undoStack().push(new CreateCommand(this, item->text(0), scenePos));
modelMenu->close();
});
//Setup filtering
connect(txtBox, &QLineEdit::textChanged, [treeView](const QString &text) {
QTreeWidgetItemIterator categoryIt(treeView, QTreeWidgetItemIterator::HasChildren);
while (*categoryIt)
(*categoryIt++)->setHidden(true);
QTreeWidgetItemIterator it(treeView, QTreeWidgetItemIterator::NoChildren);
while (*it) {
auto modelName = (*it)->text(0);
const bool match = (modelName.contains(text, Qt::CaseInsensitive));
(*it)->setHidden(!match);
if (match) {
QTreeWidgetItem *parent = (*it)->parent();
while (parent) {
parent->setHidden(false);
parent = parent->parent();
}
}
++it;
}
});
// make sure the text box gets focus so the user doesn't have to click on it
txtBox->setFocus();
// QMenu's instance auto-destruction
modelMenu->setAttribute(Qt::WA_DeleteOnClose);
return modelMenu;
}
bool DataFlowGraphicsScene::save() const
{
QString fileName = QFileDialog::getSaveFileName(nullptr,
tr("Open Flow Scene"),
QDir::homePath(),
tr("Flow Scene Files (*.flow)"));
if (!fileName.isEmpty()) {
if (!fileName.endsWith("flow", Qt::CaseInsensitive))
fileName += ".flow";
QFile file(fileName);
if (file.open(QIODevice::WriteOnly)) {
QJsonObject sceneJson = _graphModel.save();
QJsonArray groupsJsonArray;
for (auto const &[groupId, groupPtr] : groups()) {
if (!groupPtr)
continue;
QJsonObject groupJson;
groupJson["id"] = static_cast<qint64>(groupId);
groupJson["name"] = groupPtr->name();
QJsonArray nodeIdsJson;
for (NodeId const nodeId : groupPtr->nodeIDs()) {
nodeIdsJson.append(static_cast<qint64>(nodeId));
}
groupJson["nodes"] = nodeIdsJson;
groupJson["locked"] = groupPtr->groupGraphicsObject().locked();
groupsJsonArray.append(groupJson);
}
if (!groupsJsonArray.isEmpty()) {
sceneJson["groups"] = groupsJsonArray;
}
file.write(QJsonDocument(sceneJson).toJson());
return true;
}
}
return false;
}
bool DataFlowGraphicsScene::load()
{
QString fileName = QFileDialog::getOpenFileName(nullptr,
tr("Open Flow Scene"),
QDir::homePath(),
tr("Flow Scene Files (*.flow)"));
if (!QFileInfo::exists(fileName))
return false;
QFile file(fileName);
if (!file.open(QIODevice::ReadOnly))
return false;
clearScene();
QByteArray const wholeFile = file.readAll();
QJsonParseError parseError{};
QJsonDocument const sceneDocument = QJsonDocument::fromJson(wholeFile, &parseError);
if (parseError.error != QJsonParseError::NoError || !sceneDocument.isObject())
return false;
QJsonObject const sceneJson = sceneDocument.object();
_graphModel.load(sceneJson);
if (sceneJson.contains("groups")) {
QJsonArray const groupsJsonArray = sceneJson["groups"].toArray();
for (QJsonValue groupValue : groupsJsonArray) {
QJsonObject const groupObject = groupValue.toObject();
QJsonArray const nodeIdsJson = groupObject["nodes"].toArray();
std::vector<NodeGraphicsObject *> groupNodes;
groupNodes.reserve(nodeIdsJson.size());
for (QJsonValue idValue : nodeIdsJson) {
NodeId const nodeId = static_cast<NodeId>(idValue.toInt());
if (auto *nodeObject = nodeGraphicsObject(nodeId)) {
groupNodes.push_back(nodeObject);
}
}
if (groupNodes.empty())
continue;
QString const groupName = groupObject["name"].toString();
GroupId const groupId = jsonValueToGroupId(groupObject["id"]);
auto const groupWeak = createGroup(groupNodes, groupName, groupId);
if (auto group = groupWeak.lock()) {
bool const locked = groupObject["locked"].toBool(true);
group->groupGraphicsObject().lock(locked);
}
}
}
Q_EMIT sceneLoaded();
return true;
}
void DataFlowGraphicsScene::updateConnectionGraphics(
const std::unordered_set<ConnectionId> &connections, bool state)
{
for (auto const &c : connections) {
if (auto *cgo = connectionGraphicsObject(c)) {
cgo->connectionState().setFrozen(state);
cgo->update();
}
}
}
} // namespace QtNodes
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