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<td align="right" valign="top" width="230"><img src="images/trolltech-logo.png" align="right" width="203" height="32" border="0" /></td></tr></table><h1 align="center">window.cpp Example File<br /><small><small>painting/basicdrawing/window.cpp</small></small></h1>

<pre>  /****************************************************************************

** This file is part of the documentation of the Qt Toolkit.

** This file may be distributed under the terms of the Q Public License

** as defined by Trolltech AS of Norway and appearing in the file

** LICENSE.QPL included in the packaging of this file.

** This file may be distributed and/or modified under the terms of the

** GNU General Public License version 2 as published by the Free Software

** Foundation and appearing in the file LICENSE.GPL included in the

** packaging of this file.

** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for

** information about Qt Commercial License Agreements.

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** See http://www.trolltech.com/gpl/ for GPL licensing information.

** Contact info@trolltech.com if any conditions of this licensing are

** not clear to you.

** 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:"));

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penCapLabel->setBuddy(penCapComboBox);

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penJoinComboBox = new QComboBox;

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penJoinComboBox->addItem(tr("Miter"), Qt::MiterJoin);

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penJoinComboBox->addItem(tr("Bevel"), Qt::BevelJoin);

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penJoinComboBox->addItem(tr("Round"), Qt::RoundJoin);

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penJoinLabel = new QLabel(tr("Pen &Join:"));

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penJoinLabel->setBuddy(penJoinComboBox);

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brushStyleComboBox = new QComboBox;

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brushStyleComboBox->addItem(tr("Linear Gradient"),

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Qt::LinearGradientPattern);

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brushStyleComboBox->addItem(tr("Radial Gradient"),

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Qt::RadialGradientPattern);

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brushStyleComboBox->addItem(tr("Conical Gradient"),

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Qt::ConicalGradientPattern);

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brushStyleComboBox->addItem(tr("Texture"), Qt::TexturePattern);

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brushStyleComboBox->addItem(tr("Solid"), Qt::SolidPattern);

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brushStyleComboBox->addItem(tr("Horizontal"), Qt::HorPattern);

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brushStyleComboBox->addItem(tr("Vertical"), Qt::VerPattern);

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brushStyleComboBox->addItem(tr("Cross"), Qt::CrossPattern);

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brushStyleComboBox->addItem(tr("Backward Diagonal"), Qt::BDiagPattern);

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brushStyleComboBox->addItem(tr("Forward Diagonal"), Qt::FDiagPattern);

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brushStyleComboBox->addItem(tr("Diagonal Cross"), Qt::DiagCrossPattern);

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brushStyleComboBox->addItem(tr("Dense 1"), Qt::Dense1Pattern);

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brushStyleComboBox->addItem(tr("Dense 2"), Qt::Dense2Pattern);

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brushStyleComboBox->addItem(tr("Dense 3"), Qt::Dense3Pattern);

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brushStyleComboBox->addItem(tr("Dense 4"), Qt::Dense4Pattern);

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brushStyleComboBox->addItem(tr("Dense 5"), Qt::Dense5Pattern);

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brushStyleComboBox->addItem(tr("Dense 6"), Qt::Dense6Pattern);

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brushStyleComboBox->addItem(tr("Dense 7"), Qt::Dense7Pattern);

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brushStyleComboBox->addItem(tr("None"), Qt::NoBrush);

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brushStyleLabel = new QLabel(tr("&Brush Style:"));

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brushStyleLabel->setBuddy(brushStyleComboBox);

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antialiasingCheckBox = new QCheckBox(tr("&Antialiasing"));

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transformationsCheckBox = new QCheckBox(tr("&Transformations"));

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connect(shapeComboBox, SIGNAL(activated(int)),

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this, SLOT(shapeChanged()));

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connect(penWidthSpinBox, SIGNAL(valueChanged(int)),

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this, SLOT(penChanged()));

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connect(penStyleComboBox, SIGNAL(activated(int)),

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this, SLOT(penChanged()));

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connect(penCapComboBox, SIGNAL(activated(int)),

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this, SLOT(penChanged()));

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connect(penJoinComboBox, SIGNAL(activated(int)),

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this, SLOT(penChanged()));

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connect(brushStyleComboBox, SIGNAL(activated(int)),

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this, SLOT(brushChanged()));

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connect(antialiasingCheckBox, SIGNAL(toggled(bool)),

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renderArea, SLOT(setAntialiased(bool)));

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connect(transformationsCheckBox, SIGNAL(toggled(bool)),

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renderArea, SLOT(setTransformed(bool)));

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QHBoxLayout *checkBoxLayout = new QHBoxLayout;

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checkBoxLayout->addWidget(antialiasingCheckBox);

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checkBoxLayout->addWidget(transformationsCheckBox);

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QGridLayout *mainLayout = new QGridLayout;

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mainLayout->addWidget(renderArea, 0, 0, 1, 2);

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mainLayout->addWidget(shapeLabel, 1, 0);

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mainLayout->addWidget(shapeComboBox, 1, 1);

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mainLayout->addWidget(penWidthLabel, 2, 0);

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mainLayout->addWidget(penWidthSpinBox, 2, 1);

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mainLayout->addWidget(penStyleLabel, 3, 0);

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mainLayout->addWidget(penStyleComboBox, 3, 1);

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mainLayout->addWidget(penCapLabel, 4, 0);

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mainLayout->addWidget(penCapComboBox, 4, 1);

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mainLayout->addWidget(penJoinLabel, 5, 0);

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mainLayout->addWidget(penJoinComboBox, 5, 1);

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mainLayout->addWidget(brushStyleLabel, 6, 0);

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mainLayout->addWidget(brushStyleComboBox, 6, 1);

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mainLayout->addLayout(checkBoxLayout, 7, 0, 1, 2);

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setLayout(mainLayout);

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shapeChanged();

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penChanged();

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brushChanged();

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penChanged();

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renderArea->setAntialiased(false);

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renderArea->setTransformed(false);

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setWindowTitle(tr("Basic Drawing"));

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}

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void Window::shapeChanged()

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{

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RenderArea::Shape shape =

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(RenderArea::Shape)shapeComboBox->itemData(shapeComboBox->currentIndex(), IdRole).toInt();

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renderArea->setShape(shape);

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}

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void Window::penChanged()

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{

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int width = penWidthSpinBox->value();

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Qt::PenStyle style =

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(Qt::PenStyle)penStyleComboBox->itemData(penStyleComboBox->currentIndex(), IdRole).toInt();

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Qt::PenCapStyle cap =

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(Qt::PenCapStyle)penCapComboBox->itemData(penCapComboBox->currentIndex(), IdRole).toInt();

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Qt::PenJoinStyle join =

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(Qt::PenJoinStyle)penJoinComboBox->itemData(penJoinComboBox->currentIndex(), IdRole).toInt();

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renderArea->setPen(QPen(Qt::blue, width, style, cap, join));

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}

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void Window::brushChanged()

209

{

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Qt::BrushStyle style =

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(Qt::BrushStyle)brushStyleComboBox->itemData(brushStyleComboBox->currentIndex(), IdRole).toInt();

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if (style == Qt::LinearGradientPattern) {

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QLinearGradient linearGradient(0, 0, 100, 100);

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linearGradient.setColorAt(0.0, Qt::white);

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linearGradient.setColorAt(0.2, Qt::green);

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linearGradient.setColorAt(1.0, Qt::black);

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renderArea->setBrush(linearGradient);

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} else if (style == Qt::RadialGradientPattern) {

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QRadialGradient radialGradient(50, 50, 50, 50, 50);

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radialGradient.setColorAt(0.0, Qt::white);

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radialGradient.setColorAt(0.2, Qt::green);

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radialGradient.setColorAt(1.0, Qt::black);

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renderArea->setBrush(radialGradient);

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} else if (style == Qt::ConicalGradientPattern) {

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QConicalGradient conicalGradient(50, 50, 150);

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conicalGradient.setColorAt(0.0, Qt::white);

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conicalGradient.setColorAt(0.2, Qt::green);

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conicalGradient.setColorAt(1.0, Qt::black);

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renderArea->setBrush(conicalGradient);

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} else if (style == Qt::TexturePattern) {

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renderArea->setBrush(QBrush(QPixmap(":/images/brick.png")));

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} else {

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renderArea->setBrush(QBrush(Qt::red, style));

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}

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}</pre>

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