QTableWidget problems

[eleanor]

Hi, what I want to do is create a excel like editable table where I would store XML parsed data...


I created a class like this:

DOMParser::DOMParser(QWidget *parent) : QTableWidget(parent) {
 
 
}
 
bool DOMParser::read(QIODevice *device) {
    /* column names */
    QStringList labels;
 
    /* error variables for DOM document */
    QString error_str;
    int error_line;
    int error_column;
 
    /* parse the DOM document == true if successful */
    if(!dom_document.setContent(device, true, &error_str, &error_line, &error_column)) {
        QMessageBox::information(window(),
                                 tr("DOM Reader"),
                                 tr("Parse error at line %1, column %2:\n%3")
                                 .arg(error_line)
                                 .arg(error_column)
                                 .arg(error_str));
        return false;
    }
 
    /* root element */
    QDomElement root = dom_document.documentElement();
    qDebug() << "ROOT: " << root.tagName() << endl;
 
    QDomElement child = root.firstChildElement();
 
    while(!child.isNull()) {
        parse_element(child);
        child = child.nextSiblingElement();
    }
 
    return true;
}
 
void DOMParser::parse_element(const QDomElement &element, QTableWidgetItem *parent_item) {
    qDebug() << "Element: " << element.tagName();
 
    QTableWidgetItem *item = new QTableWidgetItem();
    QDomNode child = element.firstChild();
    if(child.hasChildNodes()) {
 
        QString value = element.firstChildElement().text();
        item->setText(value);
        this->setItem(this->rowCount(), this->columnCount(), item);
    }
    while(!child.isNull()) {
        parse_element(child.toElement(), item);
        child = child.nextSiblingElement();
    }
 
}

DOMParser::DOMParser(QWidget *parent) : QTableWidget(parent) {


}

bool DOMParser::read(QIODevice *device) {
    /* column names */
    QStringList labels;

    /* error variables for DOM document */
    QString error_str;
    int error_line;
    int error_column;

    /* parse the DOM document == true if successful */
    if(!dom_document.setContent(device, true, &error_str, &error_line, &error_column)) {
        QMessageBox::information(window(),
                                 tr("DOM Reader"),
                                 tr("Parse error at line %1, column %2:\n%3")
                                 .arg(error_line)
                                 .arg(error_column)
                                 .arg(error_str));
        return false;
    }

    /* root element */
    QDomElement root = dom_document.documentElement();
    qDebug() << "ROOT: " << root.tagName() << endl;

    QDomElement child = root.firstChildElement();

    while(!child.isNull()) {
        parse_element(child);
        child = child.nextSiblingElement();
    }

    return true;
}

void DOMParser::parse_element(const QDomElement &element, QTableWidgetItem *parent_item) {
    qDebug() << "Element: " << element.tagName();

    QTableWidgetItem *item = new QTableWidgetItem();
    QDomNode child = element.firstChild();
    if(child.hasChildNodes()) {
        
        QString value = element.firstChildElement().text();
        item->setText(value);
        this->setItem(this->rowCount(), this->columnCount(), item);
    }
    while(!child.isNull()) {
        parse_element(child.toElement(), item);
        child = child.nextSiblingElement();
    }

}

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But the problem is that when I set centralWidget(new DOMParser) in another class, there's nothing displayed on the screen. What am I doing wrong?

[spirit]

how do you set central widget? can we see this code?

[eleanor]

Yes, you may, like this:

/* window preferences */
    this->resize(800,600);
    this->setWindowTitle("Test");
 
    parser = new DOMParser();
    setCentralWidget(parser);
 
    create_actions();
    create_menus();
    create_toolbars();

/* window preferences */
    this->resize(800,600);
    this->setWindowTitle("Test");

    parser = new DOMParser();
    setCentralWidget(parser);

    create_actions();
    create_menus();
    create_toolbars();

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[spirit]

whe do you pass QIODevice in your code to DOMParser::read(QIODevice *device)?
use qDebug in DOMParser::read(QIODevice *device) and you'll see when it is called if it's called at all.

[eleanor]

It is called...when I go under file->open and then choose an xml file...that read() function is called sucessfully...but there's still nothing to be seen on the screen.

[spirit]

I don't see where you increment rowCount and columnCount.
do you set rowCount & columnCount?

[lyuts]

What is the base class for DOMParser?