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Qt-interest Archive, January 2007
QComboBox and QDataWidgetMapper

Message 1 in thread

hi.

i'm trying to map a QComboBox with QDataWidgetMapper, but don't get results as 
expected.

the sources are attached.

is it my fault or a bug?

thanks in advance,

alexander

#include "cb_vs_dwm.hpp"

#include "cb_vs_dwm.hpp"

MyWindow::MyWindow():QMainWindow()
{
    // setup combobox
    this->cb = new QComboBox(this);
    this->cb->addItem("a bla", QVariant("a"));
    this->cb->addItem("b bla", QVariant("b"));
    this->cb->addItem("b bla", QVariant("c"));
    this->cb->addItem("d bla", QVariant("d"));
    this->cb->addItem("e bla", QVariant("e"));

    // setup model
    this->model = new QStandardItemModel(1, 1, this);

    // setup datawidgetmapper
    this->dwm = new QDataWidgetMapper(this);
    this->dwm->setSubmitPolicy(QDataWidgetMapper::AutoSubmit);
    this->dwm->setModel(this->model);
    this->dwm->addMapping(this->cb, 0);

    // connect signals
    this->connect(this->cb, 
                  SIGNAL(currentIndexChanged(int)), 
                  this, SLOT(cbChanged(int)));

    this->connect(this->dwm, 
                  SIGNAL(currentIndexChanged(int)), 
                  this, SLOT(dwmChanged(int)));
                            
    // reset datawidgetmapper
    this->dwm->toFirst();
}

void MyWindow::cbChanged(int i)
{
    QModelIndex mi = this->model->index(0, 0);
    QString data = mi.data().toString();
    qDebug() <<"cbChanged, data: "<<data<<", i: "<<i;
}
void MyWindow::dwmChanged(int i)
{
    QModelIndex mi = this->model->index(0, 0);
    QString data = mi.data().toString();
    qDebug() <<"dwmChanged, data: "<<data<<", i: "<<i;
}

#include <QObject>

#include <QObject>
#include <QMainWindow>
#include <QComboBox>
#include <QStandardItemModel>
#include <QDataWidgetMapper>
#include <QApplication>
#include <QModelIndex>
#include <QtDebug>

class MyWindow: public QMainWindow
{
    Q_OBJECT

    public:
        MyWindow();

    protected slots:
        void cbChanged(int i);
        void dwmChanged(int i);

    private:
        QComboBox *cb; 
        QStandardItemModel *model;
        QDataWidgetMapper *dwm;

};

#include "cb_vs_dwm.hpp"

#include "cb_vs_dwm.hpp"

int main(int argc, char *argv[])
{
    //Q_INIT_RESOURCE(application);
    QApplication app(argc, argv);

    MyWindow w;
    w.show();

    return app.exec();
}
Message 2 in thread

> i'm trying to map a QComboBox with QDataWidgetMapper, but don't get
> results as
> expected.

What results are you expecting?  What results are you getting?

--Justin

--
 [ signature omitted ]
Message 3 in thread

justin@xxxxxxx wrote:
 >> i'm trying to map a QComboBox with QDataWidgetMapper, but don't get
 >> results as
 >> expected.
 >
 > What results are you expecting?  What results are you getting?
i expect the selection of the combobox changes the model to the attached
QVariant. this works fine with other widgets, but i can't get the combobox to be
mapped.

seems to me, that the model isn't changed in any way by the mapper.

alexander


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 [ signature omitted ]