<?xml version="1.0" encoding="iso-8859-1"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <title>Qt 4.6: dialog.cpp Example File (layouts/dynamiclayouts/dialog.cpp)</title> <link href="classic.css" rel="stylesheet" type="text/css" /> </head> <body> <table border="0" cellpadding="0" cellspacing="0" width="100%"> <tr> <td align="left" valign="top" width="32"><a href="http://qt.nokia.com/"><img src="images/qt-logo.png" align="left" border="0" /></a></td> <td width="1"> </td><td class="postheader" valign="center"><a href="index.html"><font color="#004faf">Home</font></a> · <a href="classes.html"><font color="#004faf">All Classes</font></a> · <a href="functions.html"><font color="#004faf">All Functions</font></a> · <a href="overviews.html"><font color="#004faf">Overviews</font></a></td></tr></table><h1 class="title">dialog.cpp Example File<br /><span class="small-subtitle">layouts/dynamiclayouts/dialog.cpp</span> </h1> <pre><span class="comment"> /**************************************************************************** ** ** Copyright (C) 2010 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. ** ** $QT_BEGIN_LICENSE:LGPL$ ** Commercial Usage ** Licensees holding valid Qt Commercial licenses may use this file in ** accordance with the Qt Commercial License Agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and Nokia. ** ** 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. ** ** 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 have questions regarding the use of this file, please contact ** Nokia at qt-info@nokia.com. ** $QT_END_LICENSE$ ** ****************************************************************************/</span> #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())); }</pre> <p /><address><hr /><div align="center"> <table width="100%" cellspacing="0" border="0"><tr class="address"> <td width="40%" align="left">Copyright © 2010 Nokia Corporation and/or its subsidiary(-ies)</td> <td width="20%" align="center"><a href="trademarks.html">Trademarks</a></td> <td width="40%" align="right"><div align="right">Qt 4.6.3</div></td> </tr></table></div></address></body> </html>