/local/samples+demos/anchorlayout/main.cpp

/****************************************************************************

**

** 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.

** $QT_END_LICENSE$

**

****************************************************************************/



#include <QGraphicsWidget>

#include <QGraphicsProxyWidget>

#include <QGraphicsAnchorLayout>

#include <QtGui>



static QGraphicsProxyWidget *createItem(const QSizeF &minimum = QSizeF(100.0, 100.0),

                                   const QSizeF &preferred = QSize(150.0, 100.0),

                                   const QSizeF &maximum = QSizeF(200.0, 100.0),

                                   const QString &name = "0")

{

    QGraphicsProxyWidget *w = new QGraphicsProxyWidget;

    w->setWidget(new QPushButton(name));

    w->setData(0, name);

    w->setMinimumSize(minimum);

    w->setPreferredSize(preferred);

    w->setMaximumSize(maximum);



    w->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred);

    return w;

}



int main(int argc, char **argv)

{

    QApplication app(argc, argv);



    QGraphicsScene scene;

    scene.setSceneRect(0, 0, 800, 480);



    QSizeF minSize(30, 100);

    QSizeF prefSize(210, 100);

    QSizeF maxSize(300, 100);



    QGraphicsProxyWidget *a = createItem(minSize, prefSize, maxSize, "A");

    QGraphicsProxyWidget *b = createItem(minSize, prefSize, maxSize, "B");

    QGraphicsProxyWidget *c = createItem(minSize, prefSize, maxSize, "C");

    QGraphicsProxyWidget *d = createItem(minSize, prefSize, maxSize, "D");

    QGraphicsProxyWidget *e = createItem(minSize, prefSize, maxSize, "E");

    QGraphicsProxyWidget *f = createItem(QSizeF(30, 50), QSizeF(150, 50), maxSize, "F (overflow)");

    QGraphicsProxyWidget *g = createItem(QSizeF(30, 50), QSizeF(30, 100), maxSize, "G (overflow)");



    QGraphicsAnchorLayout *l = new QGraphicsAnchorLayout;

    l->setSpacing(0);



    QGraphicsWidget *w = new QGraphicsWidget(0, Qt::Window);

    w->setPos(20, 20);

    w->setLayout(l);



    // vertical

    QGraphicsAnchor *anchor = l->addAnchor(a, Qt::AnchorTop, l, Qt::AnchorTop);

    anchor = l->addAnchor(b, Qt::AnchorTop, l, Qt::AnchorTop);



    anchor = l->addAnchor(c, Qt::AnchorTop, a, Qt::AnchorBottom);

    anchor = l->addAnchor(c, Qt::AnchorTop, b, Qt::AnchorBottom);

    anchor = l->addAnchor(c, Qt::AnchorBottom, d, Qt::AnchorTop);

    anchor = l->addAnchor(c, Qt::AnchorBottom, e, Qt::AnchorTop);



    anchor = l->addAnchor(d, Qt::AnchorBottom, l, Qt::AnchorBottom);

    anchor = l->addAnchor(e, Qt::AnchorBottom, l, Qt::AnchorBottom);



    anchor = l->addAnchor(c, Qt::AnchorTop, f, Qt::AnchorTop);

    anchor = l->addAnchor(c, Qt::AnchorVerticalCenter, f, Qt::AnchorBottom);

    anchor = l->addAnchor(f, Qt::AnchorBottom, g, Qt::AnchorTop);

    anchor = l->addAnchor(c, Qt::AnchorBottom, g, Qt::AnchorBottom);



    // horizontal

    anchor = l->addAnchor(l, Qt::AnchorLeft, a, Qt::AnchorLeft);

    anchor = l->addAnchor(l, Qt::AnchorLeft, d, Qt::AnchorLeft);

    anchor = l->addAnchor(a, Qt::AnchorRight, b, Qt::AnchorLeft);



    anchor = l->addAnchor(a, Qt::AnchorRight, c, Qt::AnchorLeft);

    anchor = l->addAnchor(c, Qt::AnchorRight, e, Qt::AnchorLeft);



    anchor = l->addAnchor(b, Qt::AnchorRight, l, Qt::AnchorRight);

    anchor = l->addAnchor(e, Qt::AnchorRight, l, Qt::AnchorRight);

    anchor = l->addAnchor(d, Qt::AnchorRight, e, Qt::AnchorLeft);



    anchor = l->addAnchor(l, Qt::AnchorLeft, f, Qt::AnchorLeft);

    anchor = l->addAnchor(l, Qt::AnchorLeft, g, Qt::AnchorLeft);

    anchor = l->addAnchor(f, Qt::AnchorRight, g, Qt::AnchorRight);





    scene.addItem(w);

    scene.setBackgroundBrush(Qt::darkGreen);

    QGraphicsView view(&scene);

    view.show();



    return app.exec();

}