configdialog.cpp Example File

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  #include <QtWidgets>

  #include "configdialog.h"
  #include "pages.h"

  ConfigDialog::ConfigDialog()
  {
      contentsWidget = new QListWidget;
      contentsWidget->setViewMode(QListView::IconMode);
      contentsWidget->setIconSize(QSize(96, 84));
      contentsWidget->setMovement(QListView::Static);
      contentsWidget->setMaximumWidth(128);
      contentsWidget->setSpacing(12);

      pagesWidget = new QStackedWidget;
      pagesWidget->addWidget(new ConfigurationPage);
      pagesWidget->addWidget(new UpdatePage);
      pagesWidget->addWidget(new QueryPage);

      QPushButton *closeButton = new QPushButton(tr("Close"));

      createIcons();
      contentsWidget->setCurrentRow(0);

      connect(closeButton, &QAbstractButton::clicked, this, &QWidget::close);

      QHBoxLayout *horizontalLayout = new QHBoxLayout;
      horizontalLayout->addWidget(contentsWidget);
      horizontalLayout->addWidget(pagesWidget, 1);

      QHBoxLayout *buttonsLayout = new QHBoxLayout;
      buttonsLayout->addStretch(1);
      buttonsLayout->addWidget(closeButton);

      QVBoxLayout *mainLayout = new QVBoxLayout;
      mainLayout->addLayout(horizontalLayout);
      mainLayout->addStretch(1);
      mainLayout->addSpacing(12);
      mainLayout->addLayout(buttonsLayout);
      setLayout(mainLayout);

      setWindowTitle(tr("Config Dialog"));
  }

  void ConfigDialog::createIcons()
  {
      QListWidgetItem *configButton = new QListWidgetItem(contentsWidget);
      configButton->setIcon(QIcon(":/images/config.png"));
      configButton->setText(tr("Configuration"));
      configButton->setTextAlignment(Qt::AlignHCenter);
      configButton->setFlags(Qt::ItemIsSelectable | Qt::ItemIsEnabled);

      QListWidgetItem *updateButton = new QListWidgetItem(contentsWidget);
      updateButton->setIcon(QIcon(":/images/update.png"));
      updateButton->setText(tr("Update"));
      updateButton->setTextAlignment(Qt::AlignHCenter);
      updateButton->setFlags(Qt::ItemIsSelectable | Qt::ItemIsEnabled);

      QListWidgetItem *queryButton = new QListWidgetItem(contentsWidget);
      queryButton->setIcon(QIcon(":/images/query.png"));
      queryButton->setText(tr("Query"));
      queryButton->setTextAlignment(Qt::AlignHCenter);
      queryButton->setFlags(Qt::ItemIsSelectable | Qt::ItemIsEnabled);

      connect(contentsWidget, &QListWidget::currentItemChanged, this, &ConfigDialog::changePage);
  }

  void ConfigDialog::changePage(QListWidgetItem *current, QListWidgetItem *previous)
  {
      if (!current)
          current = previous;

      pagesWidget->setCurrentIndex(contentsWidget->row(current));
  }