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Diffstat (limited to 'examples/layouts/dynamiclayouts/dialog.cpp')
| -rw-r--r-- | examples/layouts/dynamiclayouts/dialog.cpp | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/examples/layouts/dynamiclayouts/dialog.cpp b/examples/layouts/dynamiclayouts/dialog.cpp new file mode 100644 index 0000000..eee15f6 --- /dev/null +++ b/examples/layouts/dynamiclayouts/dialog.cpp @@ -0,0 +1,170 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (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 either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** 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 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** 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 +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@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())); +} |