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# configdialog.cpp Example File
dialogs/configdialog/configdialog.cpp

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     #include <QtGui>

     #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));
     }