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, SIGNAL(clicked()), this, SLOT(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,
             SIGNAL(currentItemChanged(QListWidgetItem*,QListWidgetItem*)),
             this, SLOT(changePage(QListWidgetItem*,QListWidgetItem*)));
 }

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

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