QDirModel

[rvb13]

Hi,

I am trying to develop a program which uses the QComboBox and a QListBox coupled with QDirModel.

The QCombobox will be listing all the drives and the listbox will be containing the contents of the Drive that I select from the QComboBox.

I am not able to connect them together.

Can someone please help me.

Thanks

[jpn]

Start by extending QComboBox with a "currentIndexChanged" signal with QModelIndex parameter:

class ComboBox : public QComboBox
{
    Q_OBJECT
 
    public:
        ComboBox(QWidget* parent = 0) : QComboBox(parent)
        {
            connect(this, SIGNAL(currentIndexChanged(int)), this, SLOT(emitCurrentIndexChanged(int)));
        }
 
    signals:
        void currentIndexChanged(const QModelIndex& index);
 
    private slots:
        void emitCurrentIndexChanged(int index)
        {
            emit currentIndexChanged(rootModelIndex().child(index, modelColumn()));
        }
};

class ComboBox : public QComboBox
{
    Q_OBJECT

    public:
        ComboBox(QWidget* parent = 0) : QComboBox(parent)
        {
            connect(this, SIGNAL(currentIndexChanged(int)), this, SLOT(emitCurrentIndexChanged(int)));
        }

    signals:
        void currentIndexChanged(const QModelIndex& index);

    private slots:
        void emitCurrentIndexChanged(int index)
        {
            emit currentIndexChanged(rootModelIndex().child(index, modelColumn()));
        }
};

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Then you can just connect ComboBox::currentIndexChanged(QModelIndex) to QAbstractItemView::setRootIndex(QModelIndex) and you're done.

int main(int argc, char* argv[])
{
    QApplication a(argc, argv);
    QDirModel dirModel;
    ComboBox comboBox;
    comboBox.setModel(&dirModel);
    comboBox.show();
    QListView listView;
    listView.setModel(&dirModel);
    listView.show();
    a.connect(&comboBox, SIGNAL(currentIndexChanged(QModelIndex)), &listView, SLOT(setRootIndex(QModelIndex)));
    return a.exec();
}

int main(int argc, char* argv[])
{
    QApplication a(argc, argv);
    QDirModel dirModel;
    ComboBox comboBox;
    comboBox.setModel(&dirModel);
    comboBox.show();
    QListView listView;
    listView.setModel(&dirModel);
    listView.show();
    a.connect(&comboBox, SIGNAL(currentIndexChanged(QModelIndex)), &listView, SLOT(setRootIndex(QModelIndex)));
    return a.exec();
}

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[rvb13]

Awesome !
Thanks !