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# configdialog.cpp Example File

dialogs/configdialog/configdialog.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2015 The Qt Company Ltd.
     ** Contact: http://www.qt.io/licensing/
     **
     ** This file is part of the examples of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:BSD$
     ** You may use this file under the terms of the BSD license as follows:
     **
     ** "Redistribution and use in source and binary forms, with or without
     ** modification, are permitted provided that the following conditions are
     ** met:
     **   * Redistributions of source code must retain the above copyright
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     **     notice, this list of conditions and the following disclaimer in
     **     the documentation and/or other materials provided with the
     **     distribution.
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     **     contributors may be used to endorse or promote products derived
     **     from this software without specific prior written permission.
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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));
     }