embeddeddialog.cpp Example File

/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the demonstration applications of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:BSD$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** BSD License Usage
** Alternatively, 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
**     notice, this list of conditions and the following disclaimer.
**   * Redistributions in binary form must reproduce the above copyright
**     notice, this list of conditions and the following disclaimer in
**     the documentation and/or other materials provided with the
**     distribution.
**   * Neither the name of The Qt Company Ltd nor the names of its
**     contributors may be used to endorse or promote products derived
**     from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "embeddeddialog.h"
#include "ui_embeddeddialog.h"
#include <QStyleFactory>
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, QOverload<int>::of(&QComboBox::activated),
            this, &EmbeddedDialog::layoutDirectionChanged);
    connect(ui->spacing, &QSlider::valueChanged,
            this, &EmbeddedDialog::spacingChanged);
    connect(ui->fontComboBox, &QFontComboBox::currentFontChanged,
            this, &EmbeddedDialog::fontChanged);
    connect(ui->style, QOverload<const QString &>::of(&QComboBox::activated),
            this, &EmbeddedDialog::styleChanged);
}
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);
}