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window.cpp

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#include <QtGui>

#include "window.h"

Window::Window(QWidget *parent)
    : QWidget(parent)
{
    setupModel();

    nameLabel = new QLabel(tr("Na&me:"));
    nameEdit = new QLineEdit();
    addressLabel = new QLabel(tr("&Address:"));
    addressEdit = new QTextEdit();
    ageLabel = new QLabel(tr("A&ge (in years):"));
    ageSpinBox = new QSpinBox();
    nextButton = new QPushButton(tr("&Next"));
    previousButton = new QPushButton(tr("&Previous"));

    nameLabel->setBuddy(nameEdit);
    addressLabel->setBuddy(addressEdit);
    ageLabel->setBuddy(ageSpinBox);

    mapper = new QDataWidgetMapper(this);
    mapper->setModel(model);
    mapper->addMapping(nameEdit, 0);
    mapper->addMapping(addressEdit, 1);
    mapper->addMapping(ageSpinBox, 2);

    connect(previousButton, SIGNAL(clicked()),
            mapper, SLOT(toPrevious()));
    connect(nextButton, SIGNAL(clicked()),
            mapper, SLOT(toNext()));
    connect(mapper, SIGNAL(currentIndexChanged(int)),
            this, SLOT(updateButtons(int)));

    QGridLayout *layout = new QGridLayout();
    layout->addWidget(nameLabel, 0, 0, 1, 1);
    layout->addWidget(nameEdit, 0, 1, 1, 1);
    layout->addWidget(previousButton, 0, 2, 1, 1);
    layout->addWidget(addressLabel, 1, 0, 1, 1);
    layout->addWidget(addressEdit, 1, 1, 2, 1);
    layout->addWidget(nextButton, 1, 2, 1, 1);
    layout->addWidget(ageLabel, 3, 0, 1, 1);
    layout->addWidget(ageSpinBox, 3, 1, 1, 1);
    setLayout(layout);

    setWindowTitle(tr("Simple Widget Mapper"));
    mapper->toFirst();
}

void Window::setupModel()
{
    model = new QStandardItemModel(5, 3, this);

    QStringList names;
    names << "Alice" << "Bob" << "Carol" << "Donald" << "Emma";

    QStringList addresses;
    addresses << "<qt>123 Main Street<br/>Market Town</qt>"
              << "<qt>PO Box 32<br/>Mail Handling Service"
                 "<br/>Service City</qt>"
              << "<qt>The Lighthouse<br/>Remote Island</qt>"
              << "<qt>47338 Park Avenue<br/>Big City</qt>"
              << "<qt>Research Station<br/>Base Camp<br/>Big Mountain</qt>";

    QStringList ages;
    ages << "20" << "31" << "32" << "19" << "26";
    
    for (int row = 0; row < 5; ++row) {
      QStandardItem *item = new QStandardItem(names[row]);
      model->setItem(row, 0, item);
      item = new QStandardItem(addresses[row]);
      model->setItem(row, 1, item);
      item = new QStandardItem(ages[row]);
      model->setItem(row, 2, item);
    }
}

void Window::updateButtons(int row)
{
    previousButton->setEnabled(row > 0);
    nextButton->setEnabled(row < model->rowCount() - 1);
}

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