QMapIterator

[Arend]

Hello,

I have defined a pointer to a QMap<QString,QVector<int> > *mapSerie_, see the code below.
Now I want to iterate over the map: QMapIterator<QString,QVector<int> > i = mapSerie_->begin();
But this gives an error.
How to define such a iterator?

Regards,
Arend


The header:

#include <QMainWindow>
#include <QVector>
#include <QMap>
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
    Q_OBJECT
public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();
private:
    Ui::MainWindow *ui;
private slots:
    QMap<QString,QVector<int> > *mapSerie();
private:
    QMap<QString,QVector<int> > *mapSerie_;
};

#include <QMainWindow>
#include <QVector>
#include <QMap>
namespace Ui {
class MainWindow;
}
class MainWindow : public QMainWindow
{
    Q_OBJECT
public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();
private:
    Ui::MainWindow *ui;
private slots:
    QMap<QString,QVector<int> > *mapSerie();
private:
    QMap<QString,QVector<int> > *mapSerie_;
};

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The source:

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "QMap"
#include <QVector>
#include <QMapIterator>
 
MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    mapSerie_ = new QMap<QString,QVector<int> >;
 
    QString name="One";
    QVector<int> serie;
 
    for(size_t i=0;i<10;++i)
        serie.push_back(i);
 
    mapSerie_->insert(name,serie);
    QMapIterator<QString,QVector<int> > i = mapSerie_->begin();
}
 
MainWindow::~MainWindow()
{
    delete ui;
}
 
QMap<QString,QVector<int> > *MainWindow::mapSerie()
{
    return mapSerie_;
}

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include "QMap"
#include <QVector>
#include <QMapIterator>

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    mapSerie_ = new QMap<QString,QVector<int> >;

    QString name="One";
    QVector<int> serie;

    for(size_t i=0;i<10;++i)
        serie.push_back(i);

    mapSerie_->insert(name,serie);
    QMapIterator<QString,QVector<int> > i = mapSerie_->begin();
}

MainWindow::~MainWindow()
{
    delete ui;
}

QMap<QString,QVector<int> > *MainWindow::mapSerie()
{
    return mapSerie_;
}

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[anda_skoa]

QMap::begin() returns an STL (standard template library) style iterator, QMapIterator is a Java-style iterator and is created by passing the container to its constructor.

So you can either to

QMapIterator<QString, QVector<int> > i(*mapSerie_);

QMapIterator<QString, QVector<int> > i(*mapSerie_);

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or

QMap<QString, QVector<int> >::const_iterator i = mapSerie->begin();

QMap<QString, QVector<int> >::const_iterator i = mapSerie->begin();

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Cheers,
_

[Arend]

Thanks, the first one works.
Arend