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Copy pathDataFlowGraphicsScene.cpp
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193 lines (148 loc) · 5.58 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/QtGlobal>
#include <stdexcept>
#include <utility>
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)) {
file.write(QJsonDocument(_graphModel.save()).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();
_graphModel.load(QJsonDocument::fromJson(wholeFile).object());
Q_EMIT sceneLoaded();
return true;
}
} // namespace QtNodes