Qt 5.11 | Qt Widgets | Simple Widget Mapper Example | window.cpp Example File

Qt 5.11.3 Reference Documentation

# window.cpp Example File

itemviews/simplewidgetmapper/window.cpp

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      #include "window.h"

      #include <QtWidgets>

      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, &QAbstractButton::clicked, mapper, &QDataWidgetMapper::toPrevious);
          connect(nextButton, &QAbstractButton::clicked, mapper, &QDataWidgetMapper::toNext);
          connect(mapper, &QDataWidgetMapper::currentIndexChanged, this, &Window::updateButtons);

          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);
      }