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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.

     8 **

     9 ** $QT_BEGIN_LICENSE:LGPL$

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

    13 ** contained in the Technology Preview License Agreement accompanying

    14 ** this package.

    15 **

    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

    19 ** Foundation and appearing in the file LICENSE.LGPL included in the

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    21 ** ensure the GNU Lesser General Public License version 2.1 requirements

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

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    29 ** Nokia at qt-info@nokia.com.

    30 **

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    35 **

    36 **

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    38 ** $QT_END_LICENSE$

    39 **

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

    41 

    42 #include <QtGui>

    43 

    44 #include "renderarea.h"

    45 

    46 //! [0]

    47 RenderArea::RenderArea(QWidget *parent)

    48     : QWidget(parent)

    49 {

    50     shape = Polygon;

    51     antialiased = false;

    52     transformed = false;

    53     pixmap.load(":/images/qt-logo.png");

    54 

    55     setBackgroundRole(QPalette::Base);

    56     setAutoFillBackground(true);

    57 }

    58 //! [0]

    59 

    60 //! [1]

    61 QSize RenderArea::minimumSizeHint() const

    62 {

    63     return QSize(100, 100);

    64 }

    65 //! [1]

    66 

    67 //! [2]

    68 QSize RenderArea::sizeHint() const

    69 {

    70     return QSize(400, 200);

    71 }

    72 //! [2]

    73 

    74 //! [3]

    75 void RenderArea::setShape(Shape shape)

    76 {

    77     this->shape = shape;

    78     update();

    79 }

    80 //! [3]

    81 

    82 //! [4]

    83 void RenderArea::setPen(const QPen &pen)

    84 {

    85     this->pen = pen;

    86     update();

    87 }

    88 //! [4]

    89 

    90 //! [5]

    91 void RenderArea::setBrush(const QBrush &brush)

    92 {

    93     this->brush = brush;

    94     update();

    95 }

    96 //! [5]

    97 

    98 //! [6]

    99 void RenderArea::setAntialiased(bool antialiased)

   100 {

   101     this->antialiased = antialiased;

   102     update();

   103 }

   104 //! [6]

   105 

   106 //! [7]

   107 void RenderArea::setTransformed(bool transformed)

   108 {

   109     this->transformed = transformed;

   110     update();

   111 }

   112 //! [7]

   113 

   114 //! [8]

   115 void RenderArea::paintEvent(QPaintEvent * /* event */)

   116 {

   117     static const QPoint points[4] = {

   118         QPoint(10, 80),

   119         QPoint(20, 10),

   120         QPoint(80, 30),

   121         QPoint(90, 70)

   122     };

   123 

   124     QRect rect(10, 20, 80, 60);

   125 

   126     QPainterPath path;

   127     path.moveTo(20, 80);

   128     path.lineTo(20, 30);

   129     path.cubicTo(80, 0, 50, 50, 80, 80);

   130 

   131     int startAngle = 20 * 16;

   132     int arcLength = 120 * 16;

   133 //! [8]

   134 

   135 //! [9]

   136     QPainter painter(this);

   137     painter.setPen(pen);

   138     painter.setBrush(brush);

   139     if (antialiased)

   140         painter.setRenderHint(QPainter::Antialiasing, true);

   141 //! [9]

   142 

   143 //! [10]

   144     for (int x = 0; x < width(); x += 100) {

   145         for (int y = 0; y < height(); y += 100) {

   146             painter.save();

   147             painter.translate(x, y);

   148 //! [10] //! [11]

   149             if (transformed) {

   150                 painter.translate(50, 50);

   151                 painter.rotate(60.0);

   152                 painter.scale(0.6, 0.9);

   153                 painter.translate(-50, -50);

   154             }

   155 //! [11]

   156 

   157 //! [12]

   158             switch (shape) {

   159             case Line:

   160                 painter.drawLine(rect.bottomLeft(), rect.topRight());

   161                 break;

   162             case Points:

   163                 painter.drawPoints(points, 4);

   164                 break;

   165             case Polyline:

   166                 painter.drawPolyline(points, 4);

   167                 break;

   168             case Polygon:

   169                 painter.drawPolygon(points, 4);

   170                 break;

   171             case Rect:

   172                 painter.drawRect(rect);

   173                 break;

   174             case RoundedRect:

   175                 painter.drawRoundedRect(rect, 25, 25, Qt::RelativeSize);

   176                 break;

   177             case Ellipse:

   178                 painter.drawEllipse(rect);

   179                 break;

   180             case Arc:

   181                 painter.drawArc(rect, startAngle, arcLength);

   182                 break;

   183             case Chord:

   184                 painter.drawChord(rect, startAngle, arcLength);

   185                 break;

   186             case Pie:

   187                 painter.drawPie(rect, startAngle, arcLength);

   188                 break;

   189             case Path:

   190                 painter.drawPath(path);

   191                 break;

   192             case Text:

   193                 painter.drawText(rect, Qt::AlignCenter, tr("Qt by\nNokia"));

   194                 break;

   195             case Pixmap:

   196                 painter.drawPixmap(10, 10, pixmap);

   197             }

   198 //! [12] //! [13]

   199             painter.restore();

   200         }

   201     }

   202 

   203     painter.setRenderHint(QPainter::Antialiasing, false);

   204     painter.setPen(palette().dark().color());

   205     painter.setBrush(Qt::NoBrush);

   206     painter.drawRect(QRect(0, 0, width() - 1, height() - 1));

   207 }

   208 //! [13]