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     2 **

     3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

     4 ** All rights reserved.

     5 ** Contact: Nokia Corporation (qt-info@nokia.com)

     6 **

     7 ** This file is part of the examples of the Qt Toolkit.

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     9 ** $QT_BEGIN_LICENSE:LGPL$

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    12 ** You may use this file in accordance with the terms and conditions

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    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

    18 ** General Public License version 2.1 as published by the Free Software

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    24 ** In addition, as a special exception, Nokia gives you certain additional

    25 ** rights.  These rights are described in the Nokia Qt LGPL Exception

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    38 ** $QT_END_LICENSE$

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    40 ****************************************************************************/

    41 

    42 #include <QtGui>

    43 

    44 class Widget : public QGraphicsWidget

    45 {

    46 public:

    47     Widget(const QColor &color, const QColor &textColor, const QString &caption,

    48            QGraphicsItem *parent = 0)

    49         : QGraphicsWidget(parent), caption(caption), color(color), textColor(textColor)

    50     {

    51     }

    52 

    53     void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0)

    54     {

    55         QFont font;

    56         font.setPixelSize(0.75 * qMin(boundingRect().width(), boundingRect().height()));

    57 

    58         painter->fillRect(boundingRect(), color);

    59         painter->save();

    60         painter->setFont(font);

    61         painter->setPen(textColor);

    62         painter->drawText(boundingRect(), Qt::AlignCenter, caption);

    63         painter->restore();

    64     }

    65 

    66 private:

    67     QString caption;

    68     QColor color;

    69     QColor textColor;

    70 };

    71 

    72 int main(int argc, char *argv[])

    73 {

    74     QApplication app(argc, argv);

    75 

    76     QGraphicsScene *scene = new QGraphicsScene();

    77 

    78     Widget *a = new Widget(Qt::blue, Qt::white, "a");

    79     a->setPreferredSize(100, 100);

    80     Widget *b = new Widget(Qt::green, Qt::black, "b");

    81     b->setPreferredSize(100, 100);

    82     Widget *c = new Widget(Qt::red, Qt::black, "c");

    83     c->setPreferredSize(100, 100);

    84 

    85     QGraphicsAnchorLayout *layout = new QGraphicsAnchorLayout();

    86 /*

    87     //! [adding a corner anchor in two steps]

    88     layout->addAnchor(a, Qt::AnchorTop, layout, Qt::AnchorTop);

    89     layout->addAnchor(a, Qt::AnchorLeft, layout, Qt::AnchorLeft);

    90     //! [adding a corner anchor in two steps]

    91 */

    92     //! [adding a corner anchor]

    93     layout->addCornerAnchors(a, Qt::TopLeftCorner, layout, Qt::TopLeftCorner);

    94     //! [adding a corner anchor]

    95 

    96     //! [adding anchors]

    97     layout->addAnchor(b, Qt::AnchorLeft, a, Qt::AnchorRight);

    98     layout->addAnchor(b, Qt::AnchorTop, a, Qt::AnchorBottom);

    99     //! [adding anchors]

   100 

   101     // Place a third widget below the second.

   102     layout->addAnchor(b, Qt::AnchorBottom, c, Qt::AnchorTop);

   103 

   104 /*

   105     //! [adding anchors to match sizes in two steps]

   106     layout->addAnchor(b, Qt::AnchorLeft, c, Qt::AnchorLeft);

   107     layout->addAnchor(b, Qt::AnchorRight, c, Qt::AnchorRight);

   108     //! [adding anchors to match sizes in two steps]

   109 */

   110 

   111     //! [adding anchors to match sizes]

   112     layout->addAnchors(b, c, Qt::Horizontal);

   113     //! [adding anchors to match sizes]

   114 

   115     // Anchor the bottom-right corner of the third widget to the bottom-right

   116     // corner of the layout.

   117     layout->addCornerAnchors(c, Qt::BottomRightCorner, layout, Qt::BottomRightCorner);

   118 

   119     QGraphicsWidget *w = new QGraphicsWidget(0, Qt::Window | Qt::CustomizeWindowHint | Qt::WindowTitleHint);

   120     w->setPos(20, 20);

   121     w->setMinimumSize(100, 100);

   122     w->setPreferredSize(320, 240);

   123     w->setLayout(layout);

   124     w->setWindowTitle(QApplication::translate("simpleanchorlayout", "QGraphicsAnchorLayout in use"));

   125     scene->addItem(w);

   126 

   127     QGraphicsView *view = new QGraphicsView();

   128     view->setScene(scene);

   129     view->setWindowTitle(QApplication::translate("simpleanchorlayout", "Simple Anchor Layout"));

   130     view->resize(360, 320);

   131     view->show();

   132 

   133     return app.exec();

   134 }