/******************************************************************************** Copyright (C) 2005-2006 Trolltech ASA. All rights reserved.**** This file is part of the example classes of the Qt Toolkit.**** This file may be used under the terms of the GNU General Public** License version 2.0 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 GNU** General Public Licensing requirements will be met:** http://www.trolltech.com/products/qt/opensource.html**** If you are unsure which license is appropriate for your use, please** review the following information:** http://www.trolltech.com/products/qt/licensing.html or contact the** sales department at sales@trolltech.com.**** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.******************************************************************************/#include <QtGui>#include "renderarea.h"#include "window.h"const int IdRole = Qt::UserRole;Window::Window(){    renderArea = new RenderArea;    shapeComboBox = new QComboBox;    shapeComboBox->addItem(tr("Rectangle"), RenderArea::Rect);    shapeComboBox->addItem(tr("Round Rectangle"), RenderArea::RoundRect);    shapeComboBox->addItem(tr("Ellipse"), RenderArea::Ellipse);    shapeComboBox->addItem(tr("Pie"), RenderArea::Pie);    shapeComboBox->addItem(tr("Chord"), RenderArea::Chord);    shapeComboBox->addItem(tr("Polygon"), RenderArea::Polygon);    shapeComboBox->addItem(tr("Path"), RenderArea::Path);    shapeComboBox->addItem(tr("Line"), RenderArea::Line);    shapeComboBox->addItem(tr("Polyline"), RenderArea::Polyline);    shapeComboBox->addItem(tr("Arc"), RenderArea::Arc);    shapeComboBox->addItem(tr("Points"), RenderArea::Points);    shapeComboBox->addItem(tr("Text"), RenderArea::Text);    shapeComboBox->addItem(tr("Pixmap"), RenderArea::Pixmap);    shapeLabel = new QLabel(tr("&Shape:"));    shapeLabel->setBuddy(shapeComboBox);    penWidthSpinBox = new QSpinBox;    penWidthSpinBox->setRange(0, 20);    penWidthLabel = new QLabel(tr("Pen &Width:"));    penWidthLabel->setBuddy(penWidthSpinBox);    penStyleComboBox = new QComboBox;    penStyleComboBox->addItem(tr("Solid"), Qt::SolidLine);    penStyleComboBox->addItem(tr("Dash"), Qt::DashLine);    penStyleComboBox->addItem(tr("Dot"), Qt::DotLine);    penStyleComboBox->addItem(tr("Dash Dot"), Qt::DashDotLine);    penStyleComboBox->addItem(tr("Dash Dot Dot"), Qt::DashDotDotLine);    penStyleComboBox->addItem(tr("None"), Qt::NoPen);    penStyleLabel = new QLabel(tr("&Pen Style:"));    penStyleLabel->setBuddy(penStyleComboBox);    penCapComboBox = new QComboBox;    penCapComboBox->addItem(tr("Flat"), Qt::FlatCap);    penCapComboBox->addItem(tr("Square"), Qt::SquareCap);    penCapComboBox->addItem(tr("Round"), Qt::RoundCap);    penCapLabel = new QLabel(tr("Pen &Cap:"));    penCapLabel->setBuddy(penCapComboBox);    penJoinComboBox = new QComboBox;    penJoinComboBox->addItem(tr("Miter"), Qt::MiterJoin);    penJoinComboBox->addItem(tr("Bevel"), Qt::BevelJoin);    penJoinComboBox->addItem(tr("Round"), Qt::RoundJoin);    penJoinLabel = new QLabel(tr("Pen &Join:"));    penJoinLabel->setBuddy(penJoinComboBox);    brushStyleComboBox = new QComboBox;    brushStyleComboBox->addItem(tr("Linear Gradient"),            Qt::LinearGradientPattern);    brushStyleComboBox->addItem(tr("Radial Gradient"),            Qt::RadialGradientPattern);    brushStyleComboBox->addItem(tr("Conical Gradient"),            Qt::ConicalGradientPattern);    brushStyleComboBox->addItem(tr("Texture"), Qt::TexturePattern);    brushStyleComboBox->addItem(tr("Solid"), Qt::SolidPattern);    brushStyleComboBox->addItem(tr("Horizontal"), Qt::HorPattern);    brushStyleComboBox->addItem(tr("Vertical"), Qt::VerPattern);    brushStyleComboBox->addItem(tr("Cross"), Qt::CrossPattern);    brushStyleComboBox->addItem(tr("Backward Diagonal"), Qt::BDiagPattern);    brushStyleComboBox->addItem(tr("Forward Diagonal"), Qt::FDiagPattern);    brushStyleComboBox->addItem(tr("Diagonal Cross"), Qt::DiagCrossPattern);    brushStyleComboBox->addItem(tr("Dense 1"), Qt::Dense1Pattern);    brushStyleComboBox->addItem(tr("Dense 2"), Qt::Dense2Pattern);    brushStyleComboBox->addItem(tr("Dense 3"), Qt::Dense3Pattern);    brushStyleComboBox->addItem(tr("Dense 4"), Qt::Dense4Pattern);    brushStyleComboBox->addItem(tr("Dense 5"), Qt::Dense5Pattern);    brushStyleComboBox->addItem(tr("Dense 6"), Qt::Dense6Pattern);    brushStyleComboBox->addItem(tr("Dense 7"), Qt::Dense7Pattern);    brushStyleComboBox->addItem(tr("None"), Qt::NoBrush);    brushStyleLabel = new QLabel(tr("&Brush Style:"));    brushStyleLabel->setBuddy(brushStyleComboBox);    antialiasingCheckBox = new QCheckBox(tr("&Antialiasing"));    transformationsCheckBox = new QCheckBox(tr("&Transformations"));    connect(shapeComboBox, SIGNAL(activated(int)),            this, SLOT(shapeChanged()));    connect(penWidthSpinBox, SIGNAL(valueChanged(int)),            this, SLOT(penChanged()));    connect(penStyleComboBox, SIGNAL(activated(int)),            this, SLOT(penChanged()));    connect(penCapComboBox, SIGNAL(activated(int)),            this, SLOT(penChanged()));    connect(penJoinComboBox, SIGNAL(activated(int)),            this, SLOT(penChanged()));    connect(brushStyleComboBox, SIGNAL(activated(int)),            this, SLOT(brushChanged()));    connect(antialiasingCheckBox, SIGNAL(toggled(bool)),            renderArea, SLOT(setAntialiased(bool)));    connect(transformationsCheckBox, SIGNAL(toggled(bool)),            renderArea, SLOT(setTransformed(bool)));    QHBoxLayout *checkBoxLayout = new QHBoxLayout;    checkBoxLayout->addWidget(antialiasingCheckBox);    checkBoxLayout->addWidget(transformationsCheckBox);    QGridLayout *mainLayout = new QGridLayout;    mainLayout->addWidget(renderArea, 0, 0, 1, 2);    mainLayout->addWidget(shapeLabel, 1, 0);    mainLayout->addWidget(shapeComboBox, 1, 1);    mainLayout->addWidget(penWidthLabel, 2, 0);    mainLayout->addWidget(penWidthSpinBox, 2, 1);    mainLayout->addWidget(penStyleLabel, 3, 0);    mainLayout->addWidget(penStyleComboBox, 3, 1);    mainLayout->addWidget(penCapLabel, 4, 0);    mainLayout->addWidget(penCapComboBox, 4, 1);    mainLayout->addWidget(penJoinLabel, 5, 0);    mainLayout->addWidget(penJoinComboBox, 5, 1);    mainLayout->addWidget(brushStyleLabel, 6, 0);    mainLayout->addWidget(brushStyleComboBox, 6, 1);    mainLayout->addLayout(checkBoxLayout, 7, 0, 1, 2);    setLayout(mainLayout);    shapeChanged();    penChanged();    brushChanged();    renderArea->setAntialiased(false);    renderArea->setTransformed(false);    setWindowTitle(tr("Basic Drawing"));}void Window::shapeChanged(){    RenderArea::Shape shape =        (RenderArea::Shape)shapeComboBox->itemData(shapeComboBox->currentIndex(), IdRole).toInt();    renderArea->setShape(shape);}void Window::penChanged(){    int width = penWidthSpinBox->value();    Qt::PenStyle style =        (Qt::PenStyle)penStyleComboBox->itemData(penStyleComboBox->currentIndex(), IdRole).toInt();    Qt::PenCapStyle cap =        (Qt::PenCapStyle)penCapComboBox->itemData(penCapComboBox->currentIndex(), IdRole).toInt();    Qt::PenJoinStyle join =        (Qt::PenJoinStyle)penJoinComboBox->itemData(penJoinComboBox->currentIndex(), IdRole).toInt();    renderArea->setPen(QPen(Qt::blue, width, style, cap, join));}void Window::brushChanged(){    Qt::BrushStyle style =        (Qt::BrushStyle)brushStyleComboBox->itemData(brushStyleComboBox->currentIndex(), IdRole).toInt();    if (style == Qt::LinearGradientPattern) {        QLinearGradient linearGradient(0, 0, 100, 100);        linearGradient.setColorAt(0.0, Qt::white);        linearGradient.setColorAt(0.2, Qt::green);        linearGradient.setColorAt(1.0, Qt::black);        renderArea->setBrush(linearGradient);    } else if (style == Qt::RadialGradientPattern) {        QRadialGradient radialGradient(50, 50, 50, 50, 50);        radialGradient.setColorAt(0.0, Qt::white);        radialGradient.setColorAt(0.2, Qt::green);        radialGradient.setColorAt(1.0, Qt::black);        renderArea->setBrush(radialGradient);    } else if (style == Qt::ConicalGradientPattern) {        QConicalGradient conicalGradient(50, 50, 150);        conicalGradient.setColorAt(0.0, Qt::white);        conicalGradient.setColorAt(0.2, Qt::green);        conicalGradient.setColorAt(1.0, Qt::black);        renderArea->setBrush(conicalGradient);    } else if (style == Qt::TexturePattern) {        renderArea->setBrush(QBrush(QPixmap(":/images/brick.png")));    } else {        renderArea->setBrush(QBrush(Qt::green, style));    }}