Esempio n. 1
0
bool GraphScene::saveTo(const QString &fileName)
{
    QFile file(fileName);
    if (file.open(QFile::WriteOnly | QFile::Truncate)) {
        QTextStream stream(&file);

        // Save the nodes with the following line format: 'node $NAME $TYPE $ROW $COL $FORMULA'
        for (int row = 0; row < m_gridLayout->rowCount(); row++) {
            for (int column = 0; column < m_gridLayout->columnCount(); column++) {
                NodeItem *node = static_cast<NodeItem *>(m_gridLayout->itemAt(row, column));
                if (node) {
                    stream << "node " << node->name() << ' ' << node->nodeType() << ' '
                           << row << ' ' << column << " \"" << node->formula() << '"' << endl;
                }
            }
        }
        // Save the edges with the following line format: 'edge $NAME $START $END $FORMULA'
        foreach (const DirectedEdgeItem *edge, m_edges) {
            stream << "edge " << edge->name() << ' ' << edge->start()->name() << ' '
                   << edge->end()->name() << " \"" << edge->formula() << '"' << endl;
        }
        file.close();
        return true;
    }
Esempio n. 2
0
bool GraphScene::loadFrom(const QString &fileName)
{
    QFile file(fileName);
    if (file.exists() && file.open(QFile::ReadOnly)) {
        QTextStream stream(&file);
        QHash<QString, NodeItem *> nodes;                   // Temporary hashmap for faster lookup

        init(EmptyInit);                                    // Create an empty scene

        QString line;
        do {                                                // Iterate over all the lines in the file
            line = stream.readLine();                       // and split the line at ' ' characters
            const QStringList splittedLine = line.split(" ");
            if (splittedLine[0] == "node") {
                // Found a node, add it to the scene
                NodeItem *node = new NodeItem(NULL, this);
                node->setName(splittedLine[1]);
                NodeItem::NodeType nodeType = static_cast<NodeItem::NodeType>(splittedLine[2].toInt());
                switch (nodeType) {
                    case NodeItem::InputNode:
                        setInputNode(node);                 // We found the input node
                        break;
                    case NodeItem::OutputNode:
                        setOuputNode(node);                 // We found the ouput node
                        break;
                    case NodeItem::StandardNode:
                        // This should already be set by default but doesn't harm here
                        node->setNodeType(NodeItem::StandardNode);
                        break;
                }
                // There is obviously a (Matlab) formula attached, parse it...
                if (splittedLine.length() > 5) {
                    int formulaStart = line.indexOf('"');
                    QString formula = line;
                    formula.remove(0, formulaStart);
                    while (!formula.endsWith('"')) {        // Formula spans multiple lines
                        formula += '\n' + stream.readLine();
                    }
                    formula.chop(1);                        // Remove leading '"'
                    formula.remove(0, 1);                   // Remove trailing '"'
                    node->setFormula(formula);
                }

                nodes.insert(node->name(), node);
                m_gridLayout->addItem(node, splittedLine[3].toInt(), splittedLine[4].toInt());
            } else if (splittedLine[0] == "edge") {
                NodeItem *start = nodes[splittedLine[2]];   // Found an edge, add it to the scene
                NodeItem *end = nodes[splittedLine[3]];

                DirectedEdgeItem *edge = addEdge(start, end);
                edge->setName(splittedLine[1]);
                // There is obviously a (Matlab) formula attached, parse it...
                if (splittedLine.length() > 4) {
                    int formulaStart = line.indexOf('"');
                    QString formula = line;
                    formula.remove(0, formulaStart);
                    while (!formula.endsWith('"')) {        // Formula spans multiple lines
                        formula += '\n' + stream.readLine();
                    }
                    formula.chop(1);                        // Remove leading '"'
                    formula.remove(0, 1);                   // Remove trailing '"'
                    edge->setFormula(formula);
                }
            }
        } while (!line.isNull());

        emit graphChanged();
        file.close();
        return true;
    }
    return false;
}