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<title>Qt 4.6: main.cpp Example File (graphicsview/anchorlayout/main.cpp)</title>
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<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">main.cpp Example File<br /><span class="small-subtitle">graphicsview/anchorlayout/main.cpp</span>
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<pre><span class="comment"> /****************************************************************************
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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** This file is part of the examples of the Qt Toolkit.
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** $QT_BEGIN_LICENSE:LGPL$
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** Licensees holding valid Qt Commercial licenses may use this file in
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** accordance with the Qt Commercial License Agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Nokia.
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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****************************************************************************/</span>
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#include <QGraphicsWidget>
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#include <QGraphicsProxyWidget>
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#include <QGraphicsAnchorLayout>
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#include <QtGui>
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static QGraphicsProxyWidget *createItem(const QSizeF &minimum = QSizeF(100.0, 100.0),
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const QSizeF &preferred = QSize(150.0, 100.0),
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const QSizeF &maximum = QSizeF(200.0, 100.0),
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const QString &name = "0")
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QGraphicsProxyWidget *w = new QGraphicsProxyWidget;
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w->setWidget(new QPushButton(name));
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w->setData(0, name);
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w->setMinimumSize(minimum);
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w->setPreferredSize(preferred);
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w->setMaximumSize(maximum);
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w->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);
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int main(int argc, char **argv)
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QApplication app(argc, argv);
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scene.setSceneRect(0, 0, 800, 480);
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QSizeF minSize(30, 100);
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QSizeF prefSize(210, 100);
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QSizeF maxSize(300, 100);
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QGraphicsProxyWidget *a = createItem(minSize, prefSize, maxSize, "A");
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QGraphicsProxyWidget *b = createItem(minSize, prefSize, maxSize, "B");
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QGraphicsProxyWidget *c = createItem(minSize, prefSize, maxSize, "C");
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QGraphicsProxyWidget *d = createItem(minSize, prefSize, maxSize, "D");
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QGraphicsProxyWidget *e = createItem(minSize, prefSize, maxSize, "E");
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QGraphicsProxyWidget *f = createItem(QSizeF(30, 50), QSizeF(150, 50), maxSize, "F (overflow)");
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QGraphicsProxyWidget *g = createItem(QSizeF(30, 50), QSizeF(30, 100), maxSize, "G (overflow)");
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QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout;
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QGraphicsWidget *w = new QGraphicsWidget(0, Qt::Window);
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w->setPos(20, 20);
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<span class="comment">// vertical</span>
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QGraphicsAnchor *anchor = l->addAnchor(a, Qt::AnchorTop, l, Qt::AnchorTop);
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anchor = l->addAnchor(b, Qt::AnchorTop, l, Qt::AnchorTop);
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anchor = l->addAnchor(c, Qt::AnchorTop, a, Qt::AnchorBottom);
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anchor = l->addAnchor(c, Qt::AnchorTop, b, Qt::AnchorBottom);
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anchor = l->addAnchor(c, Qt::AnchorBottom, d, Qt::AnchorTop);
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anchor = l->addAnchor(c, Qt::AnchorBottom, e, Qt::AnchorTop);
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anchor = l->addAnchor(d, Qt::AnchorBottom, l, Qt::AnchorBottom);
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anchor = l->addAnchor(e, Qt::AnchorBottom, l, Qt::AnchorBottom);
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anchor = l->addAnchor(c, Qt::AnchorTop, f, Qt::AnchorTop);
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anchor = l->addAnchor(c, Qt::AnchorVerticalCenter, f, Qt::AnchorBottom);
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anchor = l->addAnchor(f, Qt::AnchorBottom, g, Qt::AnchorTop);
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anchor = l->addAnchor(c, Qt::AnchorBottom, g, Qt::AnchorBottom);
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<span class="comment">// horizontal</span>
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anchor = l->addAnchor(l, Qt::AnchorLeft, a, Qt::AnchorLeft);
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anchor = l->addAnchor(l, Qt::AnchorLeft, d, Qt::AnchorLeft);
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anchor = l->addAnchor(a, Qt::AnchorRight, b, Qt::AnchorLeft);
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anchor = l->addAnchor(a, Qt::AnchorRight, c, Qt::AnchorLeft);
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anchor = l->addAnchor(c, Qt::AnchorRight, e, Qt::AnchorLeft);
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anchor = l->addAnchor(b, Qt::AnchorRight, l, Qt::AnchorRight);
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anchor = l->addAnchor(e, Qt::AnchorRight, l, Qt::AnchorRight);
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anchor = l->addAnchor(d, Qt::AnchorRight, e, Qt::AnchorLeft);
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anchor = l->addAnchor(l, Qt::AnchorLeft, f, Qt::AnchorLeft);
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anchor = l->addAnchor(l, Qt::AnchorLeft, g, Qt::AnchorLeft);
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anchor = l->addAnchor(f, Qt::AnchorRight, g, Qt::AnchorRight);
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scene.setBackgroundBrush(Qt::darkGreen);
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QGraphicsView view(&scene);
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<table width="100%" cellspacing="0" border="0"><tr class="address">
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<td width="40%" align="left">Copyright © 2010 Nokia Corporation and/or its subsidiary(-ies)</td>
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<td width="20%" align="center"><a href="trademarks.html">Trademarks</a></td>
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<td width="40%" align="right"><div align="right">Qt 4.6.2</div></td>
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</tr></table></div></address></body>
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