Viadeo Twitter Google Bookmarks ! Facebook Digg del.icio.us MySpace Yahoo MyWeb Blinklist Netvouz Reddit Simpy StumbleUpon Bookmarks Windows Live Favorites 
Logo Documentation Qt ·  Page d'accueil  ·  Tous les espaces de nom  ·  Toutes les classes  ·  Classes principales  ·  Annotées  ·  Classes groupées  ·  Modules  ·  Fonctions  · 

pathstroke.cpp Example File
demos/pathstroke/pathstroke.cpp

 /****************************************************************************
 **
 ** Copyright (C) 2005-2008 Trolltech ASA. All rights reserved.
 **
 ** This file is part of the documentation of the Qt Toolkit.
 **
 ** This file may be used under the terms of the GNU General Public
** License versions 2.0 or 3.0 as published by the Free Software
** Foundation and appearing in the files LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file.  Alternatively you may (at
** your option) use any later version of the GNU General Public
** License if such license has been publicly approved by Trolltech ASA
** (or its successors, if any) and the KDE Free Qt Foundation. In
** addition, as a special exception, Trolltech gives you certain
** additional rights. These rights are described in the Trolltech GPL
** Exception version 1.2, which can be found at
** http://www.trolltech.com/products/qt/gplexception/ and in the file
** GPL_EXCEPTION.txt in this package.
**
** Please review the following information to ensure GNU General
** Public Licensing requirements will be met:
** http://trolltech.com/products/qt/licenses/licensing/opensource/. If
** you are unsure which license is appropriate for your use, please
** review the following information:
** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
** or contact the sales department at sales@trolltech.com.
**
** In addition, as a special exception, Trolltech, as the sole
** copyright holder for Qt Designer, grants users of the Qt/Eclipse
** Integration plug-in the right for the Qt/Eclipse Integration to
** link to functionality provided by Qt Designer and its related
** libraries.
**
** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE. Trolltech reserves all rights not expressly
** granted herein.
 **
 ** 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 "pathstroke.h"
 #include "arthurstyle.h"
 #include "arthurwidgets.h"

 extern void draw_round_rect(QPainter *p, const QRect &bounds, int radius);

 PathStrokeWidget::PathStrokeWidget()
 {
     setWindowTitle(tr("Path Stroking"));

     // Setting up palette.
     QPalette pal = palette();
 //     pal.setBrush(QPalette::Background, Qt::white);
 //     pal.setBrush(QPalette::Foreground, QColor("aquamarine"));
 //     pal.setBrush(QPalette::Background, QPixmap("background.png"));
     setPalette(pal);

     // Widget construction and property setting
     m_renderer = new PathStrokeRenderer(this);

     QGroupBox *mainGroup = new QGroupBox(this);
 //     QWidget *mainGroup = new QWidget(this);
     mainGroup->setFixedWidth(180);
     mainGroup->setTitle("Path Stroking");

     QGroupBox *capGroup = new QGroupBox(mainGroup);
     capGroup->setAttribute(Qt::WA_ContentsPropagated);
     QRadioButton *flatCap = new QRadioButton(capGroup);
     QRadioButton *squareCap = new QRadioButton(capGroup);
     QRadioButton *roundCap = new QRadioButton(capGroup);
     capGroup->setTitle("Cap Style");
     flatCap->setText("Flat Cap");
     squareCap->setText("Square Cap");
     roundCap->setText("Round Cap");

     QGroupBox *joinGroup = new QGroupBox(mainGroup);
     joinGroup->setAttribute(Qt::WA_ContentsPropagated);
     QRadioButton *bevelJoin = new QRadioButton(joinGroup);
     QRadioButton *miterJoin = new QRadioButton(joinGroup);
     QRadioButton *roundJoin = new QRadioButton(joinGroup);
     joinGroup->setTitle("Join Style");
     bevelJoin->setText("Bevel Join");
     miterJoin->setText("Miter Join");
     roundJoin->setText("Round Join");

     QGroupBox *styleGroup = new QGroupBox(mainGroup);
     styleGroup->setAttribute(Qt::WA_ContentsPropagated);
     QRadioButton *solidLine = new QRadioButton(styleGroup);
     QRadioButton *dashLine = new QRadioButton(styleGroup);
     QRadioButton *dotLine = new QRadioButton(styleGroup);
     QRadioButton *dashDotLine = new QRadioButton(styleGroup);
     QRadioButton *dashDotDotLine = new QRadioButton(styleGroup);
     QRadioButton *customDashLine = new QRadioButton(styleGroup);
     styleGroup->setTitle("Pen Style");
 #if 0
     solidLine->setText("Solid Line");
     dashLine->setText("Dash Line");
     dotLine->setText("Dot Line");
     dashDotLine->setText("Dash Dot Line");
     dashDotDotLine->setText("Dash Dot Dot Line");
 #else
     QPixmap line_solid(":res/images/line_solid.png");
     solidLine->setIcon(line_solid);
     solidLine->setIconSize(line_solid.size());
     QPixmap line_dashed(":res/images/line_dashed.png");
     dashLine->setIcon(line_dashed);
     dashLine->setIconSize(line_dashed.size());
     QPixmap line_dotted(":res/images/line_dotted.png");
     dotLine->setIcon(line_dotted);
     dotLine->setIconSize(line_dotted.size());
     QPixmap line_dash_dot(":res/images/line_dash_dot.png");
     dashDotLine->setIcon(line_dash_dot);
     dashDotLine->setIconSize(line_dash_dot.size());
     QPixmap line_dash_dot_dot(":res/images/line_dash_dot_dot.png");
     dashDotDotLine->setIcon(line_dash_dot_dot);
     dashDotDotLine->setIconSize(line_dash_dot_dot.size());
     customDashLine->setText("Custom Style");

     int fixedHeight = bevelJoin->sizeHint().height();
     solidLine->setFixedHeight(fixedHeight);
     dashLine->setFixedHeight(fixedHeight);
     dotLine->setFixedHeight(fixedHeight);
     dashDotLine->setFixedHeight(fixedHeight);
     dashDotDotLine->setFixedHeight(fixedHeight);
 #endif

     QGroupBox *pathModeGroup = new QGroupBox(mainGroup);
     pathModeGroup->setAttribute(Qt::WA_ContentsPropagated);
     QRadioButton *curveMode = new QRadioButton(pathModeGroup);
     QRadioButton *lineMode = new QRadioButton(pathModeGroup);
     pathModeGroup->setTitle("Path composed of");
     curveMode->setText("Curves");
     lineMode->setText("Lines");

     QGroupBox *penWidthGroup = new QGroupBox(mainGroup);
     penWidthGroup->setAttribute(Qt::WA_ContentsPropagated);
     QSlider *penWidth = new QSlider(Qt::Horizontal, penWidthGroup);
     penWidth->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
     penWidthGroup->setTitle("Pen Width");
     penWidth->setRange(0, 500);

 #if 0
     QCheckBox *animated = new QCheckBox(mainGroup);
     animated->setText("Animated");
 #else
     QPushButton *animated = new QPushButton(mainGroup);
     animated->setText("Animate");
     animated->setCheckable(true);
 #endif

     QPushButton *showSourceButton = new QPushButton(mainGroup);
     showSourceButton->setText("Show Source");
 #ifdef QT_OPENGL_SUPPORT
     QPushButton *enableOpenGLButton = new QPushButton(mainGroup);
     enableOpenGLButton->setText("Use OpenGL");
     enableOpenGLButton->setCheckable(true);
     enableOpenGLButton->setChecked(m_renderer->usesOpenGL());
     if (!QGLFormat::hasOpenGL())
         enableOpenGLButton->hide();
 #endif
     QPushButton *whatsThisButton = new QPushButton(mainGroup);
     whatsThisButton->setText("What's This?");
     whatsThisButton->setCheckable(true);

     // Layouting
     QHBoxLayout *viewLayout = new QHBoxLayout(this);
     viewLayout->addWidget(m_renderer);
     viewLayout->addWidget(mainGroup);

     QVBoxLayout *mainGroupLayout = new QVBoxLayout(mainGroup);
     mainGroupLayout->setMargin(3);
     mainGroupLayout->addWidget(capGroup);
     mainGroupLayout->addWidget(joinGroup);
     mainGroupLayout->addWidget(styleGroup);
     mainGroupLayout->addWidget(penWidthGroup);
     mainGroupLayout->addWidget(pathModeGroup);
     mainGroupLayout->addWidget(animated);
     mainGroupLayout->addStretch(1);
     mainGroupLayout->addWidget(showSourceButton);
 #ifdef QT_OPENGL_SUPPORT
     mainGroupLayout->addWidget(enableOpenGLButton);
 #endif
     mainGroupLayout->addWidget(whatsThisButton);

     QVBoxLayout *capGroupLayout = new QVBoxLayout(capGroup);
     capGroupLayout->addWidget(flatCap);
     capGroupLayout->addWidget(squareCap);
     capGroupLayout->addWidget(roundCap);

     QVBoxLayout *joinGroupLayout = new QVBoxLayout(joinGroup);
     joinGroupLayout->addWidget(bevelJoin);
     joinGroupLayout->addWidget(miterJoin);
     joinGroupLayout->addWidget(roundJoin);

     QVBoxLayout *styleGroupLayout = new QVBoxLayout(styleGroup);
     styleGroupLayout->addWidget(solidLine);
     styleGroupLayout->addWidget(dashLine);
     styleGroupLayout->addWidget(dotLine);
     styleGroupLayout->addWidget(dashDotLine);
     styleGroupLayout->addWidget(dashDotDotLine);
     styleGroupLayout->addWidget(customDashLine);

     QVBoxLayout *pathModeGroupLayout = new QVBoxLayout(pathModeGroup);
     pathModeGroupLayout->addWidget(curveMode);
     pathModeGroupLayout->addWidget(lineMode);

     QVBoxLayout *penWidthLayout = new QVBoxLayout(penWidthGroup);
     penWidthLayout->addWidget(penWidth);

     // Set up connections
     connect(penWidth, SIGNAL(valueChanged(int)),
             m_renderer, SLOT(setPenWidth(int)));
     connect(animated, SIGNAL(toggled(bool)),
             m_renderer, SLOT(setAnimation(bool)));

     connect(flatCap, SIGNAL(clicked()), m_renderer, SLOT(setFlatCap()));
     connect(squareCap, SIGNAL(clicked()), m_renderer, SLOT(setSquareCap()));
     connect(roundCap, SIGNAL(clicked()), m_renderer, SLOT(setRoundCap()));

     connect(bevelJoin, SIGNAL(clicked()), m_renderer, SLOT(setBevelJoin()));
     connect(miterJoin, SIGNAL(clicked()), m_renderer, SLOT(setMiterJoin()));
     connect(roundJoin, SIGNAL(clicked()), m_renderer, SLOT(setRoundJoin()));

     connect(curveMode, SIGNAL(clicked()), m_renderer, SLOT(setCurveMode()));
     connect(lineMode, SIGNAL(clicked()), m_renderer, SLOT(setLineMode()));

     connect(solidLine, SIGNAL(clicked()), m_renderer, SLOT(setSolidLine()));
     connect(dashLine, SIGNAL(clicked()), m_renderer, SLOT(setDashLine()));
     connect(dotLine, SIGNAL(clicked()), m_renderer, SLOT(setDotLine()));
     connect(dashDotLine, SIGNAL(clicked()), m_renderer, SLOT(setDashDotLine()));
     connect(dashDotDotLine, SIGNAL(clicked()), m_renderer, SLOT(setDashDotDotLine()));
     connect(customDashLine, SIGNAL(clicked()), m_renderer, SLOT(setCustomDashLine()));

     connect(showSourceButton, SIGNAL(clicked()), m_renderer, SLOT(showSource()));
 #ifdef QT_OPENGL_SUPPORT
     connect(enableOpenGLButton, SIGNAL(clicked(bool)), m_renderer, SLOT(enableOpenGL(bool)));
 #endif
     connect(whatsThisButton, SIGNAL(clicked(bool)), m_renderer, SLOT(setDescriptionEnabled(bool)));
     connect(m_renderer, SIGNAL(descriptionEnabledChanged(bool)),
             whatsThisButton, SLOT(setChecked(bool)));

     // Set the defaults
     animated->setChecked(true);
     flatCap->setChecked(true);
     bevelJoin->setChecked(true);
     penWidth->setValue(50);
     curveMode->setChecked(true);
     solidLine->setChecked(true);

     m_renderer->loadSourceFile(":res/pathstroke.cpp");
     m_renderer->loadDescription(":res/pathstroke.html");
 }

 PathStrokeRenderer::PathStrokeRenderer(QWidget *parent)
     : ArthurFrame(parent)
 {
     m_pointSize = 10;
     m_activePoint = -1;
     m_capStyle = Qt::FlatCap;
     m_joinStyle = Qt::BevelJoin;
     m_pathMode = CurveMode;
     m_penWidth = 1;
     m_penStyle = Qt::SolidLine;
     m_wasAnimated = true;
     setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
 }

 void PathStrokeRenderer::paint(QPainter *painter)
 {
     if (m_points.isEmpty())
         initializePoints();

     painter->setRenderHint(QPainter::Antialiasing);

     QPalette pal = palette();
     painter->setPen(Qt::NoPen);

     // Construct the path
     QPainterPath path;
     path.moveTo(m_points.at(0));

     if (m_pathMode == LineMode) {
         for (int i=1; i<m_points.size(); ++i) {
             path.lineTo(m_points.at(i));
         }
     } else {
         int i=1;
         while (i + 2 < m_points.size()) {
             path.cubicTo(m_points.at(i), m_points.at(i+1), m_points.at(i+2));
             i += 3;
         }
         while (i < m_points.size()) {
             path.lineTo(m_points.at(i));
             ++i;
         }
     }

     // Draw the path
     {
         QColor lg = Qt::red;

         // The "custom" pen
         if (m_penStyle == Qt::NoPen) {
             QPainterPathStroker stroker;
             stroker.setWidth(m_penWidth);
             stroker.setJoinStyle(m_joinStyle);
             stroker.setCapStyle(m_capStyle);

             QVector<qreal> dashes;
             qreal space = 4;
             dashes << 1 << space
                    << 3 << space
                    << 9 << space
                    << 27 << space
                    << 9 << space
                    << 3 << space;
             stroker.setDashPattern(dashes);
             QPainterPath stroke = stroker.createStroke(path);
             painter->fillPath(stroke, lg);

         } else {
             QPen pen(lg, m_penWidth, m_penStyle, m_capStyle, m_joinStyle);
             painter->strokePath(path, pen);
         }
     }

     if (1) {
         // Draw the control points
         painter->setPen(QColor(50, 100, 120, 200));
         painter->setBrush(QColor(200, 200, 210, 120));
         for (int i=0; i<m_points.size(); ++i) {
             QPointF pos = m_points.at(i);
             painter->drawEllipse(QRectF(pos.x() - m_pointSize,
                                        pos.y() - m_pointSize,
                                        m_pointSize*2, m_pointSize*2));
         }
         painter->setPen(QPen(Qt::lightGray, 0, Qt::SolidLine));
         painter->setBrush(Qt::NoBrush);
         painter->drawPolyline(m_points);
     }

 }

 void PathStrokeRenderer::initializePoints()
 {
     const int count = 7;
     m_points.clear();
     m_vectors.clear();

     QMatrix m;
     double rot = 360 / count;
     QPointF center(width() / 2, height() / 2);
     QMatrix vm;
     vm.shear(2, -1);
     vm.scale(3, 3);

     for (int i=0; i<count; ++i) {
         m_vectors << QPointF(.1f, .25f) * (m * vm);
         m_points << QPointF(0, 100) * m + center;
         m.rotate(rot);
     }
 }

 void PathStrokeRenderer::updatePoints()
 {
     double pad = 10;
     double left = pad;
     double right = width() - pad;
     double top = pad;
     double bottom = height() - pad;

     Q_ASSERT(m_points.size() == m_vectors.size());
     for (int i=0; i<m_points.size(); ++i) {

         if (i == m_activePoint)
             continue;

         QPointF pos = m_points.at(i);
         QPointF vec = m_vectors.at(i);
         pos += vec;
         if (pos.x() < left || pos.x() > right) {
             vec.setX(-vec.x());
             pos.setX(pos.x() < left ? left : right);
         } if (pos.y() < top || pos.y() > bottom) {
             vec.setY(-vec.y());
             pos.setY(pos.y() < top ? top : bottom);
         }
         m_points[i] = pos;
         m_vectors[i] = vec;
     }
     update();
 }

 void PathStrokeRenderer::mousePressEvent(QMouseEvent *e)
 {
     setDescriptionEnabled(false);
     m_activePoint = -1;
     qreal distance = -1;
     for (int i=0; i<m_points.size(); ++i) {
         qreal d = QLineF(e->pos(), m_points.at(i)).length();
         if ((distance < 0 && d < 8 * m_pointSize) || d < distance) {
             distance = d;
             m_activePoint = i;
         }
     }

     if (m_activePoint != -1) {
         m_wasAnimated = m_timer.isActive();
         setAnimation(false);
         mouseMoveEvent(e);
     }
 }

 void PathStrokeRenderer::mouseMoveEvent(QMouseEvent *e)
 {
     if (m_activePoint >= 0 && m_activePoint < m_points.size()) {
         m_points[m_activePoint] = e->pos();
         update();
     }
 }

 void PathStrokeRenderer::mouseReleaseEvent(QMouseEvent *)
 {
     m_activePoint = -1;
     setAnimation(m_wasAnimated);
 }

 void PathStrokeRenderer::timerEvent(QTimerEvent *e)
 {
     if (e->timerId() == m_timer.timerId()) {
         updatePoints();
         QApplication::syncX();
     } // else if (e->timerId() == m_fpsTimer.timerId()) {
 //         emit frameRate(m_frameCount);
 //         m_frameCount = 0;
 //     }
 }

 void PathStrokeRenderer::setAnimation(bool animation)
 {
     m_timer.stop();
 //     m_fpsTimer.stop();

     if (animation) {
         m_timer.start(25, this);
 //         m_fpsTimer.start(1000, this);
 //         m_frameCount = 0;
     }
 }

Publicité

Best Of

Actualités les plus lues

Semaine
Mois
Année
  1. « Quelque chose ne va vraiment pas avec les développeurs "modernes" », un développeur à "l'ancienne" critique la multiplication des bibliothèques 64
  2. Apercevoir la troisième dimension ou l'utilisation multithreadée d'OpenGL dans Qt, un article des Qt Quarterly traduit par Guillaume Belz 0
  3. Les développeurs ignorent-ils trop les failles découvertes dans leur code ? Prenez-vous en compte les remarques des autres ? 17
  4. BlackBerry 10 : premières images du prochain OS de RIM qui devrait intégrer des widgets et des tuiles inspirées de Windows Phone 0
  5. Quelles nouveautés de C++11 Visual C++ doit-il rapidement intégrer ? Donnez-nous votre avis 10
  6. Adieu qmake, bienvenue qbs : Qt Building Suite, un outil déclaratif et extensible pour la compilation de projets Qt 17
  7. La rubrique Qt a besoin de vous ! 1
Page suivante

Le blog Digia au hasard

Logo

Déploiement d'applications Qt Commercial sur les tablettes Windows 8

Le blog Digia est l'endroit privilégié pour la communication sur l'édition commerciale de Qt, où des réponses publiques sont apportées aux questions les plus posées au support. Lire l'article.

Communauté

Ressources

Liens utiles

Contact

  • Vous souhaitez rejoindre la rédaction ou proposer un tutoriel, une traduction, une question... ? Postez dans le forum Contribuez ou contactez-nous par MP ou par email (voir en bas de page).

Qt dans le magazine

Cette page est une traduction d'une page de la documentation de Qt, écrite par Nokia Corporation and/or its subsidiary(-ies). Les éventuels problèmes résultant d'une mauvaise traduction ne sont pas imputables à Nokia. Qt 4.3
Copyright © 2012 Developpez LLC. Tous droits réservés Developpez LLC. Aucune reproduction, même partielle, ne peut être faite de ce site et de l'ensemble de son contenu : textes, documents et images sans l'autorisation expresse de Developpez LLC. Sinon, vous encourez selon la loi jusqu'à 3 ans de prison et jusqu'à 300 000 E de dommages et intérêts. Cette page est déposée à la SACD.
Vous avez déniché une erreur ? Un bug ? Une redirection cassée ? Ou tout autre problème, quel qu'il soit ? Ou bien vous désirez participer à ce projet de traduction ? N'hésitez pas à nous contacter ou par MP !
 
 
 
 
Partenaires

Hébergement Web