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main.cpp
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59 lines (44 loc) · 1.71 KB
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#include <QtNodes/BasicGraphicsScene>
#include <QtNodes/ConnectionStyle>
#include <QtNodes/GraphicsView>
#include <QtNodes/StyleCollection>
#include <QAction>
#include <QScreen>
#include <QtWidgets/QApplication>
#include "SimpleGraphModel.hpp"
using QtNodes::BasicGraphicsScene;
using QtNodes::ConnectionStyle;
using QtNodes::GraphicsView;
using QtNodes::NodeRole;
using QtNodes::StyleCollection;
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
SimpleGraphModel graphModel;
// Initialize and connect two nodes.
{
NodeId id1 = graphModel.addNode();
graphModel.setNodeData(id1, NodeRole::Position, QPointF(0, 0));
NodeId id2 = graphModel.addNode();
graphModel.setNodeData(id2, NodeRole::Position, QPointF(300, 300));
graphModel.addConnection(ConnectionId{id1, 0, id2, 0});
}
auto scene = new BasicGraphicsScene(graphModel);
GraphicsView view(scene);
// Setup context menu for creating new nodes.
view.setContextMenuPolicy(Qt::ActionsContextMenu);
QAction createNodeAction(QStringLiteral("Create Node"), &view);
QObject::connect(&createNodeAction, &QAction::triggered, [&]() {
// Mouse position in scene coordinates.
QPointF posView = view.mapToScene(view.mapFromGlobal(QCursor::pos()));
NodeId const newId = graphModel.addNode();
graphModel.setNodeData(newId, NodeRole::Position, posView);
});
view.insertAction(view.actions().front(), &createNodeAction);
view.setWindowTitle("Simple Node Graph");
view.resize(800, 600);
// Center window.
view.move(QApplication::primaryScreen()->availableGeometry().center() - view.rect().center());
view.showNormal();
return app.exec();
}