<?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 4.2: 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://www.trolltech.com/products/qt"><img src="images/qt-logo.png" align="left" width="32" height="32" 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="mainclasses.html"><font color="#004faf">Main Classes</font></a> · <a href="groups.html"><font color="#004faf">Grouped Classes</font></a> · <a href="modules.html"><font color="#004faf">Modules</font></a> · <a href="functions.html"><font color="#004faf">Functions</font></a></td> <td align="right" valign="top" width="230"><a href="http://www.trolltech.com"><img src="images/trolltech-logo.png" align="right" width="203" height="32" border="0" /></a></td></tr></table><h1 align="center">dialog.cpp Example File<br /><sup><sup>layouts/dynamiclayouts/dialog.cpp</sup></sup></h1> <pre> /**************************************************************************** ** ** Copyright (C) 2006-2006 Trolltech ASA. All rights reserved. ** ** This file is part of the example classes of the Qt Toolkit. ** ** This file may be used under the terms of the GNU General Public ** License version 2.0 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 GNU ** General Public Licensing requirements will be met: ** http:<span class="comment">//www.trolltech.com/products/qt/opensource.html</span> ** ** If you are unsure which license is appropriate for your use, please ** review the following information: ** http:<span class="comment">//www.trolltech.com/products/qt/licensing.html or contact the</span> ** sales department at sales@trolltech.com. ** ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. ** ****************************************************************************/ #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="30%">Copyright © 2006 <a href="trolltech.html">Trolltech</a></td> <td width="40%" align="center"><a href="trademarks.html">Trademarks</a></td> <td width="30%" align="right"><div align="right">Qt 4.2.1</div></td> </tr></table></div></address></body> </html>