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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 demonstration applications 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

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

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    36 **

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    38 ** $QT_END_LICENSE$

    39 **

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

    41 

    42 #include "view.h"

    43 

    44 #include <QtGui>

    45 #ifndef QT_NO_OPENGL

    46 #include <QtOpenGL>

    47 #endif

    48 

    49 #include <qmath.h>

    50 

    51 View::View(const QString &name, QWidget *parent)

    52     : QFrame(parent)

    53 {

    54     setFrameStyle(Sunken | StyledPanel);

    55     graphicsView = new QGraphicsView;

    56     graphicsView->setRenderHint(QPainter::Antialiasing, false);

    57     graphicsView->setDragMode(QGraphicsView::RubberBandDrag);

    58     graphicsView->setOptimizationFlags(QGraphicsView::DontSavePainterState);

    59     graphicsView->setViewportUpdateMode(QGraphicsView::SmartViewportUpdate);

    60 

    61     int size = style()->pixelMetric(QStyle::PM_ToolBarIconSize);

    62     QSize iconSize(size, size);

    63 

    64     QToolButton *zoomInIcon = new QToolButton;

    65     zoomInIcon->setAutoRepeat(true);

    66     zoomInIcon->setAutoRepeatInterval(33);

    67     zoomInIcon->setAutoRepeatDelay(0);

    68     zoomInIcon->setIcon(QPixmap(":/zoomin.png"));

    69     zoomInIcon->setIconSize(iconSize);

    70     QToolButton *zoomOutIcon = new QToolButton;

    71     zoomOutIcon->setAutoRepeat(true);

    72     zoomOutIcon->setAutoRepeatInterval(33);

    73     zoomOutIcon->setAutoRepeatDelay(0);

    74     zoomOutIcon->setIcon(QPixmap(":/zoomout.png"));

    75     zoomOutIcon->setIconSize(iconSize);

    76     zoomSlider = new QSlider;

    77     zoomSlider->setMinimum(0);

    78     zoomSlider->setMaximum(500);

    79     zoomSlider->setValue(250);

    80     zoomSlider->setTickPosition(QSlider::TicksRight);

    81 

    82     // Zoom slider layout

    83     QVBoxLayout *zoomSliderLayout = new QVBoxLayout;

    84     zoomSliderLayout->addWidget(zoomInIcon);

    85     zoomSliderLayout->addWidget(zoomSlider);

    86     zoomSliderLayout->addWidget(zoomOutIcon);

    87 

    88     QToolButton *rotateLeftIcon = new QToolButton;

    89     rotateLeftIcon->setIcon(QPixmap(":/rotateleft.png"));

    90     rotateLeftIcon->setIconSize(iconSize);

    91     QToolButton *rotateRightIcon = new QToolButton;

    92     rotateRightIcon->setIcon(QPixmap(":/rotateright.png"));

    93     rotateRightIcon->setIconSize(iconSize);

    94     rotateSlider = new QSlider;

    95     rotateSlider->setOrientation(Qt::Horizontal);

    96     rotateSlider->setMinimum(-360);

    97     rotateSlider->setMaximum(360);

    98     rotateSlider->setValue(0);

    99     rotateSlider->setTickPosition(QSlider::TicksBelow);

   100 

   101     // Rotate slider layout

   102     QHBoxLayout *rotateSliderLayout = new QHBoxLayout;

   103     rotateSliderLayout->addWidget(rotateLeftIcon);

   104     rotateSliderLayout->addWidget(rotateSlider);

   105     rotateSliderLayout->addWidget(rotateRightIcon);

   106 

   107     resetButton = new QToolButton;

   108     resetButton->setText(tr("0"));

   109     resetButton->setEnabled(false);

   110 

   111     // Label layout

   112     QHBoxLayout *labelLayout = new QHBoxLayout;

   113     label = new QLabel(name);

   114     antialiasButton = new QToolButton;

   115     antialiasButton->setText(tr("Antialiasing"));

   116     antialiasButton->setCheckable(true);

   117     antialiasButton->setChecked(false);

   118     openGlButton = new QToolButton;

   119     openGlButton->setText(tr("OpenGL"));

   120     openGlButton->setCheckable(true);

   121 #ifndef QT_NO_OPENGL

   122     openGlButton->setEnabled(QGLFormat::hasOpenGL());

   123 #else

   124     openGlButton->setEnabled(false);

   125 #endif

   126     printButton = new QToolButton;

   127     printButton->setIcon(QIcon(QPixmap(":/fileprint.png")));

   128 

   129     labelLayout->addWidget(label);

   130     labelLayout->addStretch();

   131     labelLayout->addWidget(antialiasButton);

   132     labelLayout->addWidget(openGlButton);

   133     labelLayout->addWidget(printButton);

   134 

   135     QGridLayout *topLayout = new QGridLayout;

   136     topLayout->addLayout(labelLayout, 0, 0);

   137     topLayout->addWidget(graphicsView, 1, 0);

   138     topLayout->addLayout(zoomSliderLayout, 1, 1);

   139     topLayout->addLayout(rotateSliderLayout, 2, 0);

   140     topLayout->addWidget(resetButton, 2, 1);

   141     setLayout(topLayout);

   142 

   143     connect(resetButton, SIGNAL(clicked()), this, SLOT(resetView()));

   144     connect(zoomSlider, SIGNAL(valueChanged(int)), this, SLOT(setupMatrix()));

   145     connect(rotateSlider, SIGNAL(valueChanged(int)), this, SLOT(setupMatrix()));

   146     connect(graphicsView->verticalScrollBar(), SIGNAL(valueChanged(int)), this, SLOT(setResetButtonEnabled()));

   147     connect(graphicsView->horizontalScrollBar(), SIGNAL(valueChanged(int)), this, SLOT(setResetButtonEnabled()));

   148     connect(antialiasButton, SIGNAL(toggled(bool)), this, SLOT(toggleAntialiasing()));

   149     connect(openGlButton, SIGNAL(toggled(bool)), this, SLOT(toggleOpenGL()));

   150     connect(rotateLeftIcon, SIGNAL(clicked()), this, SLOT(rotateLeft()));

   151     connect(rotateRightIcon, SIGNAL(clicked()), this, SLOT(rotateRight()));

   152     connect(zoomInIcon, SIGNAL(clicked()), this, SLOT(zoomIn()));

   153     connect(zoomOutIcon, SIGNAL(clicked()), this, SLOT(zoomOut()));

   154     connect(printButton, SIGNAL(clicked()), this, SLOT(print()));

   155 

   156     setupMatrix();

   157 }

   158 

   159 QGraphicsView *View::view() const

   160 {

   161     return graphicsView;

   162 }

   163 

   164 void View::resetView()

   165 {

   166     zoomSlider->setValue(250);

   167     rotateSlider->setValue(0);

   168     setupMatrix();

   169     graphicsView->ensureVisible(QRectF(0, 0, 0, 0));

   170 

   171     resetButton->setEnabled(false);

   172 }

   173 

   174 void View::setResetButtonEnabled()

   175 {

   176     resetButton->setEnabled(true);

   177 }

   178 

   179 void View::setupMatrix()

   180 {

   181     qreal scale = qPow(qreal(2), (zoomSlider->value() - 250) / qreal(50));

   182 

   183     QMatrix matrix;

   184     matrix.scale(scale, scale);

   185     matrix.rotate(rotateSlider->value());

   186 

   187     graphicsView->setMatrix(matrix);

   188     setResetButtonEnabled();

   189 }

   190 

   191 void View::toggleOpenGL()

   192 {

   193 #ifndef QT_NO_OPENGL

   194     graphicsView->setViewport(openGlButton->isChecked() ? new QGLWidget(QGLFormat(QGL::SampleBuffers)) : new QWidget);

   195 #endif

   196 }

   197 

   198 void View::toggleAntialiasing()

   199 {

   200     graphicsView->setRenderHint(QPainter::Antialiasing, antialiasButton->isChecked());

   201 }

   202 

   203 void View::print()

   204 {

   205 #ifndef QT_NO_PRINTER

   206     QPrinter printer;

   207     QPrintDialog dialog(&printer, this);

   208     if (dialog.exec() == QDialog::Accepted) {

   209         QPainter painter(&printer);

   210         graphicsView->render(&painter);

   211     }

   212 #endif

   213 }

   214 

   215 void View::zoomIn()

   216 {

   217     zoomSlider->setValue(zoomSlider->value() + 1);

   218 }

   219 

   220 void View::zoomOut()

   221 {

   222     zoomSlider->setValue(zoomSlider->value() - 1);

   223 }

   224 

   225 void View::rotateLeft()

   226 {

   227     rotateSlider->setValue(rotateSlider->value() - 10);

   228 }

   229 

   230 void View::rotateRight()

   231 {

   232     rotateSlider->setValue(rotateSlider->value() + 10);

   233 }

   234