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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtGui>
#include "dialog.h"
Dialog::Dialog(QWidget *parent)
: QDialog(parent)
{
createRotableGroupBox();
createOptionsGroupBox();
createButtonBox();
mainLayout = new QGridLayout;
mainLayout->addWidget(rotableGroupBox, 0, 0);
mainLayout->addWidget(optionsGroupBox, 1, 0);
mainLayout->addWidget(buttonBox, 2, 0);
setLayout(mainLayout);
mainLayout->setSizeConstraint(QLayout::SetMinimumSize);
setWindowTitle(tr("Dynamic Layouts"));
}
void Dialog::buttonsOrientationChanged(int index)
{
mainLayout->setSizeConstraint(QLayout::SetNoConstraint);
setMinimumSize(0, 0);
Qt::Orientation orientation = Qt::Orientation(
buttonsOrientationComboBox->itemData(index).toInt());
if (orientation == buttonBox->orientation())
return;
mainLayout->removeWidget(buttonBox);
int spacing = mainLayout->spacing();
QSize oldSizeHint = buttonBox->sizeHint() + QSize(spacing, spacing);
buttonBox->setOrientation(orientation);
QSize newSizeHint = buttonBox->sizeHint() + QSize(spacing, spacing);
if (orientation == Qt::Horizontal) {
mainLayout->addWidget(buttonBox, 2, 0);
resize(size() + QSize(-oldSizeHint.width(), newSizeHint.height()));
} else {
mainLayout->addWidget(buttonBox, 0, 3, 2, 1);
resize(size() + QSize(newSizeHint.width(), -oldSizeHint.height()));
}
mainLayout->setSizeConstraint(QLayout::SetDefaultConstraint);
}
void Dialog::rotateWidgets()
{
Q_ASSERT(rotableWidgets.count() % 2 == 0);
foreach (QWidget *widget, rotableWidgets)
rotableLayout->removeWidget(widget);
rotableWidgets.enqueue(rotableWidgets.dequeue());
const int n = rotableWidgets.count();
for (int i = 0; i < n / 2; ++i) {
rotableLayout->addWidget(rotableWidgets[n - i - 1], 0, i);
rotableLayout->addWidget(rotableWidgets[i], 1, i);
}
}
void Dialog::help()
{
QMessageBox::information(this, tr("Dynamic Layouts Help"),
tr("This example shows how to change layouts "
"dynamically."));
}
void Dialog::createRotableGroupBox()
{
rotableGroupBox = new QGroupBox(tr("Rotable Widgets"));
rotableWidgets.enqueue(new QSpinBox);
rotableWidgets.enqueue(new QSlider);
rotableWidgets.enqueue(new QDial);
rotableWidgets.enqueue(new QProgressBar);
int n = rotableWidgets.count();
for (int i = 0; i < n; ++i) {
connect(rotableWidgets[i], SIGNAL(valueChanged(int)),
rotableWidgets[(i + 1) % n], SLOT(setValue(int)));
}
rotableLayout = new QGridLayout;
rotableGroupBox->setLayout(rotableLayout);
rotateWidgets();
}
void Dialog::createOptionsGroupBox()
{
optionsGroupBox = new QGroupBox(tr("Options"));
buttonsOrientationLabel = new QLabel(tr("Orientation of buttons:"));
buttonsOrientationComboBox = new QComboBox;
buttonsOrientationComboBox->addItem(tr("Horizontal"), Qt::Horizontal);
buttonsOrientationComboBox->addItem(tr("Vertical"), Qt::Vertical);
connect(buttonsOrientationComboBox, SIGNAL(currentIndexChanged(int)),
this, SLOT(buttonsOrientationChanged(int)));
optionsLayout = new QGridLayout;
optionsLayout->addWidget(buttonsOrientationLabel, 0, 0);
optionsLayout->addWidget(buttonsOrientationComboBox, 0, 1);
optionsLayout->setColumnStretch(2, 1);
optionsGroupBox->setLayout(optionsLayout);
}
void Dialog::createButtonBox()
{
buttonBox = new QDialogButtonBox;
closeButton = buttonBox->addButton(QDialogButtonBox::Close);
helpButton = buttonBox->addButton(QDialogButtonBox::Help);
rotateWidgetsButton = buttonBox->addButton(tr("Rotate &Widgets"),
QDialogButtonBox::ActionRole);
connect(rotateWidgetsButton, SIGNAL(clicked()), this, SLOT(rotateWidgets()));
connect(closeButton, SIGNAL(clicked()), this, SLOT(close()));
connect(helpButton, SIGNAL(clicked()), this, SLOT(help()));
}
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