Qt 4.8: embeddeddialog.cpp Example File (demos/embeddeddialogs/embeddeddialog.cpp)

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# embeddeddialog.cpp Example File

demos/embeddeddialogs/embeddeddialog.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2015 The Qt Company Ltd.
     ** Contact: http://www.qt.io/licensing/
     **
     ** This file is part of the demonstration applications of the Qt Toolkit.
     **
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     ** Alternatively, this file may be used under the terms of the GNU Lesser
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     ** LICENSE.LGPLv3 included in the packaging of this file. Please review the
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     ** GNU General Public License Usage
     ** Alternatively, this file may be used under the terms of the GNU
     ** General Public License version 3.0 as published by the Free Software
     ** Foundation and appearing in the file LICENSE.GPL included in the
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     #include "embeddeddialog.h"
     #include "ui_embeddeddialog.h"

     #include <QtGui>

     EmbeddedDialog::EmbeddedDialog(QWidget *parent)
         : QDialog(parent)
     {
         ui = new Ui_embeddedDialog;
         ui->setupUi(this);
         ui->layoutDirection->setCurrentIndex(layoutDirection() != Qt::LeftToRight);

         foreach (QString styleName, QStyleFactory::keys()) {
             ui->style->addItem(styleName);
             if (style()->objectName().toLower() == styleName.toLower())
                 ui->style->setCurrentIndex(ui->style->count() - 1);
         }

         connect(ui->layoutDirection, SIGNAL(activated(int)),
                 this, SLOT(layoutDirectionChanged(int)));
         connect(ui->spacing, SIGNAL(valueChanged(int)),
                 this, SLOT(spacingChanged(int)));
         connect(ui->fontComboBox, SIGNAL(currentFontChanged(QFont)),
                 this, SLOT(fontChanged(QFont)));
         connect(ui->style, SIGNAL(activated(QString)),
                 this, SLOT(styleChanged(QString)));
     }

     EmbeddedDialog::~EmbeddedDialog()
     {
         delete ui;
     }

     void EmbeddedDialog::layoutDirectionChanged(int index)
     {
         setLayoutDirection(index == 0 ? Qt::LeftToRight : Qt::RightToLeft);
     }

     void EmbeddedDialog::spacingChanged(int spacing)
     {
         layout()->setSpacing(spacing);
         adjustSize();
     }

     void EmbeddedDialog::fontChanged(const QFont &font)
     {
         setFont(font);
     }

     static void setStyleHelper(QWidget *widget, QStyle *style)
     {
         widget->setStyle(style);
         widget->setPalette(style->standardPalette());
         foreach (QObject *child, widget->children()) {
             if (QWidget *childWidget = qobject_cast<QWidget *>(child))
                 setStyleHelper(childWidget, style);
         }
     }

     void EmbeddedDialog::styleChanged(const QString &styleName)
     {
         QStyle *style = QStyleFactory::create(styleName);
         if (style)
             setStyleHelper(this, style);
     }