1 /****************************************************************************

     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 ** $QT_BEGIN_LICENSE:LGPL$

    10 ** No Commercial Usage

    11 ** This file contains pre-release code and may not be distributed.

    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

    20 ** packaging of this file.  Please review the following information to

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

    22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

    23 **

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

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

    26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

    27 **

    28 ** If you have questions regarding the use of this file, please contact

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

    30 **

    31 **

    32 **

    33 **

    34 **

    35 **

    36 **

    37 **

    38 ** $QT_END_LICENSE$

    39 **

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

    41 

    42 #include <QtGui>

    43 #include "displaywidget.h"

    44 

    45 DisplayWidget::DisplayWidget(QWidget *parent)

    46     : QWidget(parent)

    47 {

    48     QPainterPath car;

    49     QPainterPath house;

    50 

    51     QFile file(":resources/shapes.dat");

    52     file.open(QFile::ReadOnly);

    53     QDataStream stream(&file);

    54     stream >> car >> house >> tree >> moon;

    55     file.close();

    56 

    57     shapeMap[Car] = car;

    58     shapeMap[House] = house;

    59 

    60     background = Sky;

    61     shapeColor = Qt::darkYellow;

    62     shape = House;

    63 }

    64 

    65 //! [paint event]

    66 void DisplayWidget::paintEvent(QPaintEvent * /* event */)

    67 {

    68     QPainter painter;

    69     painter.begin(this);

    70     painter.setRenderHint(QPainter::Antialiasing);

    71     paint(painter);

    72     painter.end();

    73 }

    74 //! [paint event]

    75 

    76 //! [paint function]

    77 void DisplayWidget::paint(QPainter &painter)

    78 {

    79 //![paint picture]

    80     painter.setClipRect(QRect(0, 0, 200, 200));

    81     painter.setPen(Qt::NoPen);

    82 

    83     switch (background) {

    84     case Sky:

    85     default:

    86         painter.fillRect(QRect(0, 0, 200, 200), Qt::darkBlue);

    87         painter.translate(145, 10);

    88         painter.setBrush(Qt::white);

    89         painter.drawPath(moon);

    90         painter.translate(-145, -10);

    91         break;

    92     case Trees:

    93     {

    94         painter.fillRect(QRect(0, 0, 200, 200), Qt::darkGreen);

    95         painter.setBrush(Qt::green);

    96         painter.setPen(Qt::black);

    97         for (int y = -55, row = 0; y < 200; y += 50, ++row) {

    98             int xs;

    99             if (row == 2 || row == 3)

   100                 xs = 150;

   101             else

   102                 xs = 50;

   103             for (int x = 0; x < 200; x += xs) {

   104                 painter.save();

   105                 painter.translate(x, y);

   106                 painter.drawPath(tree);

   107                 painter.restore();

   108             }

   109         }

   110         break;

   111     }

   112     case Road:

   113         painter.fillRect(QRect(0, 0, 200, 200), Qt::gray);

   114         painter.setPen(QPen(Qt::white, 4, Qt::DashLine));

   115         painter.drawLine(QLine(0, 35, 200, 35));

   116         painter.drawLine(QLine(0, 165, 200, 165));

   117         break;

   118     }

   119 

   120     painter.setBrush(shapeColor);

   121     painter.setPen(Qt::black);

   122     painter.translate(100, 100);

   123     painter.drawPath(shapeMap[shape]);

   124 //![paint picture]

   125 }

   126 //! [paint function]

   127 

   128 QColor DisplayWidget::color() const

   129 {

   130     return shapeColor;

   131 }

   132 

   133 void DisplayWidget::setBackground(Background background)

   134 {

   135     this->background = background;

   136     update();

   137 }

   138 

   139 void DisplayWidget::setColor(const QColor &color)

   140 {

   141     this->shapeColor = color;

   142     update();

   143 }

   144 

   145 void DisplayWidget::setShape(Shape shape)

   146 {

   147     this->shape = shape;

   148     update();

   149 }