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diff --git a/demos/deform/pathdeform.cpp b/demos/deform/pathdeform.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the demonstration applications of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "pathdeform.h"
+
+#include <QApplication>
+#include <QtDebug>
+#include <QMouseEvent>
+#include <QTimerEvent>
+#include <QLayout>
+#include <QLineEdit>
+#include <QPainter>
+#include <QSlider>
+#include <QLabel>
+#include <QDesktopWidget>
+#include <qmath.h>
+
+PathDeformControls::PathDeformControls(QWidget *parent, PathDeformRenderer* renderer, bool smallScreen)
+ : QWidget(parent)
+{
+ m_renderer = renderer;
+
+ if (smallScreen)
+ layoutForSmallScreen();
+ else
+ layoutForDesktop();
+}
+
+
+void PathDeformControls::layoutForDesktop()
+{
+ QGroupBox* mainGroup = new QGroupBox(this);
+ mainGroup->setTitle(tr("Controls"));
+
+ QGroupBox *radiusGroup = new QGroupBox(mainGroup);
+ radiusGroup->setTitle(tr("Lens Radius"));
+ QSlider *radiusSlider = new QSlider(Qt::Horizontal, radiusGroup);
+ radiusSlider->setRange(15, 150);
+ radiusSlider->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
+
+ QGroupBox *deformGroup = new QGroupBox(mainGroup);
+ deformGroup->setTitle(tr("Deformation"));
+ QSlider *deformSlider = new QSlider(Qt::Horizontal, deformGroup);
+ deformSlider->setRange(-100, 100);
+ deformSlider->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
+
+ QGroupBox *fontSizeGroup = new QGroupBox(mainGroup);
+ fontSizeGroup->setTitle(tr("Font Size"));
+ QSlider *fontSizeSlider = new QSlider(Qt::Horizontal, fontSizeGroup);
+ fontSizeSlider->setRange(16, 200);
+ fontSizeSlider->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
+
+ QGroupBox *textGroup = new QGroupBox(mainGroup);
+ textGroup->setTitle(tr("Text"));
+ QLineEdit *textInput = new QLineEdit(textGroup);
+
+ QPushButton *animateButton = new QPushButton(mainGroup);
+ animateButton->setText(tr("Animated"));
+ animateButton->setCheckable(true);
+
+ QPushButton *showSourceButton = new QPushButton(mainGroup);
+ showSourceButton->setText(tr("Show Source"));
+
+#ifdef QT_OPENGL_SUPPORT
+ QPushButton *enableOpenGLButton = new QPushButton(mainGroup);
+ enableOpenGLButton->setText(tr("Use OpenGL"));
+ enableOpenGLButton->setCheckable(true);
+ enableOpenGLButton->setChecked(m_renderer->usesOpenGL());
+ if (!QGLFormat::hasOpenGL())
+ enableOpenGLButton->hide();
+#endif
+
+ QPushButton *whatsThisButton = new QPushButton(mainGroup);
+ whatsThisButton->setText(tr("What's This?"));
+ whatsThisButton->setCheckable(true);
+
+
+ mainGroup->setFixedWidth(180);
+
+ QVBoxLayout *mainGroupLayout = new QVBoxLayout(mainGroup);
+ mainGroupLayout->addWidget(radiusGroup);
+ mainGroupLayout->addWidget(deformGroup);
+ mainGroupLayout->addWidget(fontSizeGroup);
+ mainGroupLayout->addWidget(textGroup);
+ mainGroupLayout->addWidget(animateButton);
+ mainGroupLayout->addStretch(1);
+#ifdef QT_OPENGL_SUPPORT
+ mainGroupLayout->addWidget(enableOpenGLButton);
+#endif
+ mainGroupLayout->addWidget(showSourceButton);
+ mainGroupLayout->addWidget(whatsThisButton);
+
+ QVBoxLayout *radiusGroupLayout = new QVBoxLayout(radiusGroup);
+ radiusGroupLayout->addWidget(radiusSlider);
+
+ QVBoxLayout *deformGroupLayout = new QVBoxLayout(deformGroup);
+ deformGroupLayout->addWidget(deformSlider);
+
+ QVBoxLayout *fontSizeGroupLayout = new QVBoxLayout(fontSizeGroup);
+ fontSizeGroupLayout->addWidget(fontSizeSlider);
+
+ QVBoxLayout *textGroupLayout = new QVBoxLayout(textGroup);
+ textGroupLayout->addWidget(textInput);
+
+ QVBoxLayout * mainLayout = new QVBoxLayout(this);
+ mainLayout->addWidget(mainGroup);
+ mainLayout->setMargin(0);
+
+ connect(radiusSlider, SIGNAL(valueChanged(int)), m_renderer, SLOT(setRadius(int)));
+ connect(deformSlider, SIGNAL(valueChanged(int)), m_renderer, SLOT(setIntensity(int)));
+ connect(fontSizeSlider, SIGNAL(valueChanged(int)), m_renderer, SLOT(setFontSize(int)));
+ connect(animateButton, SIGNAL(clicked(bool)), m_renderer, SLOT(setAnimated(bool)));
+#ifdef QT_OPENGL_SUPPORT
+ connect(enableOpenGLButton, SIGNAL(clicked(bool)), m_renderer, SLOT(enableOpenGL(bool)));
+#endif
+
+ connect(textInput, SIGNAL(textChanged(QString)), m_renderer, SLOT(setText(QString)));
+ connect(m_renderer, SIGNAL(descriptionEnabledChanged(bool)),
+ whatsThisButton, SLOT(setChecked(bool)));
+ connect(whatsThisButton, SIGNAL(clicked(bool)), m_renderer, SLOT(setDescriptionEnabled(bool)));
+ connect(showSourceButton, SIGNAL(clicked()), m_renderer, SLOT(showSource()));
+
+ animateButton->animateClick();
+ deformSlider->setValue(80);
+ fontSizeSlider->setValue(120);
+ radiusSlider->setValue(100);
+ textInput->setText(tr("Qt"));
+}
+
+void PathDeformControls::layoutForSmallScreen()
+{
+ QGroupBox* mainGroup = new QGroupBox(this);
+ mainGroup->setTitle(tr("Controls"));
+
+ QLabel *radiusLabel = new QLabel(mainGroup);
+ radiusLabel->setText(tr("Lens Radius:"));
+ QSlider *radiusSlider = new QSlider(Qt::Horizontal, mainGroup);
+ radiusSlider->setRange(15, 150);
+ radiusSlider->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
+
+ QLabel *deformLabel = new QLabel(mainGroup);
+ deformLabel->setText(tr("Deformation:"));
+ QSlider *deformSlider = new QSlider(Qt::Horizontal, mainGroup);
+ deformSlider->setRange(-100, 100);
+ deformSlider->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
+
+ QLabel *fontSizeLabel = new QLabel(mainGroup);
+ fontSizeLabel->setText(tr("Font Size:"));
+ QSlider *fontSizeSlider = new QSlider(Qt::Horizontal, mainGroup);
+ fontSizeSlider->setRange(16, 200);
+ fontSizeSlider->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
+
+ QPushButton *animateButton = new QPushButton(tr("Animated"), mainGroup);
+ animateButton->setCheckable(true);
+
+#ifdef QT_OPENGL_SUPPORT
+ QPushButton *enableOpenGLButton = new QPushButton(mainGroup);
+ enableOpenGLButton->setText(tr("Use OpenGL"));
+ enableOpenGLButton->setCheckable(mainGroup);
+ enableOpenGLButton->setChecked(m_renderer->usesOpenGL());
+ if (!QGLFormat::hasOpenGL())
+ enableOpenGLButton->hide();
+#endif
+
+ QPushButton *quitButton = new QPushButton(tr("Quit"), mainGroup);
+ QPushButton *okButton = new QPushButton(tr("OK"), mainGroup);
+
+
+ QGridLayout *mainGroupLayout = new QGridLayout(mainGroup);
+ mainGroupLayout->setMargin(0);
+ mainGroupLayout->addWidget(radiusLabel, 0, 0, Qt::AlignRight);
+ mainGroupLayout->addWidget(radiusSlider, 0, 1);
+ mainGroupLayout->addWidget(deformLabel, 1, 0, Qt::AlignRight);
+ mainGroupLayout->addWidget(deformSlider, 1, 1);
+ mainGroupLayout->addWidget(fontSizeLabel, 2, 0, Qt::AlignRight);
+ mainGroupLayout->addWidget(fontSizeSlider, 2, 1);
+ mainGroupLayout->addWidget(animateButton, 3,0, 1,2);
+#ifdef QT_OPENGL_SUPPORT
+ mainGroupLayout->addWidget(enableOpenGLButton, 4,0, 1,2);
+#endif
+
+ QVBoxLayout *mainLayout = new QVBoxLayout(this);
+ mainLayout->addWidget(mainGroup);
+ mainLayout->addStretch(1);
+ mainLayout->addWidget(okButton);
+ mainLayout->addWidget(quitButton);
+
+ connect(quitButton, SIGNAL(clicked()), this, SLOT(emitQuitSignal()));
+ connect(okButton, SIGNAL(clicked()), this, SLOT(emitOkSignal()));
+ connect(radiusSlider, SIGNAL(valueChanged(int)), m_renderer, SLOT(setRadius(int)));
+ connect(deformSlider, SIGNAL(valueChanged(int)), m_renderer, SLOT(setIntensity(int)));
+ connect(fontSizeSlider, SIGNAL(valueChanged(int)), m_renderer, SLOT(setFontSize(int)));
+ connect(animateButton, SIGNAL(clicked(bool)), m_renderer, SLOT(setAnimated(bool)));
+#ifdef QT_OPENGL_SUPPORT
+ connect(enableOpenGLButton, SIGNAL(clicked(bool)), m_renderer, SLOT(enableOpenGL(bool)));
+#endif
+
+
+ animateButton->animateClick();
+ deformSlider->setValue(80);
+ fontSizeSlider->setValue(120);
+
+ QRect screen_size = QApplication::desktop()->screenGeometry();
+ radiusSlider->setValue(qMin(screen_size.width(), screen_size.height())/5);
+
+ m_renderer->setText(tr("Qt"));
+}
+
+
+void PathDeformControls::emitQuitSignal()
+{ emit quitPressed(); }
+
+void PathDeformControls::emitOkSignal()
+{ emit okPressed(); }
+
+
+PathDeformWidget::PathDeformWidget(QWidget *parent, bool smallScreen)
+ : QWidget(parent)
+{
+ setWindowTitle(tr("Vector Deformation"));
+
+ m_renderer = new PathDeformRenderer(this, smallScreen);
+ m_renderer->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
+
+ // Layouts
+ QHBoxLayout *mainLayout = new QHBoxLayout(this);
+ mainLayout->addWidget(m_renderer);
+
+ m_controls = new PathDeformControls(0, m_renderer, smallScreen);
+ m_controls->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Minimum);
+
+ if (!smallScreen)
+ mainLayout->addWidget(m_controls);
+
+ m_renderer->loadSourceFile(":res/deform/pathdeform.cpp");
+ m_renderer->loadDescription(":res/deform/pathdeform.html");
+ m_renderer->setDescriptionEnabled(false);
+
+ connect(m_renderer, SIGNAL(clicked()), this, SLOT(showControls()));
+ connect(m_controls, SIGNAL(okPressed()), this, SLOT(hideControls()));
+ connect(m_controls, SIGNAL(quitPressed()), QApplication::instance(), SLOT(quit()));
+}
+
+
+void PathDeformWidget::showControls()
+{
+ m_controls->showFullScreen();
+}
+
+void PathDeformWidget::hideControls()
+{
+ m_controls->hide();
+}
+
+void PathDeformWidget::setStyle( QStyle * style )
+{
+ QWidget::setStyle(style);
+ if (m_controls != 0)
+ {
+ m_controls->setStyle(style);
+
+ QList<QWidget *> widgets = m_controls->findChildren<QWidget *>();
+ foreach (QWidget *w, widgets)
+ w->setStyle(style);
+ }
+}
+
+static inline QRect circle_bounds(const QPointF &center, qreal radius, qreal compensation)
+{
+ return QRect(qRound(center.x() - radius - compensation),
+ qRound(center.y() - radius - compensation),
+ qRound((radius + compensation) * 2),
+ qRound((radius + compensation) * 2));
+
+}
+
+const int LENS_EXTENT = 10;
+
+PathDeformRenderer::PathDeformRenderer(QWidget *widget, bool smallScreen)
+ : ArthurFrame(widget)
+{
+ m_radius = 100;
+ m_pos = QPointF(m_radius, m_radius);
+ m_direction = QPointF(1, 1);
+ m_fontSize = 24;
+ m_animated = true;
+ m_repaintTimer.start(25, this);
+ m_repaintTracker.start();
+ m_intensity = 100;
+ m_smallScreen = smallScreen;
+
+// m_fpsTimer.start(1000, this);
+// m_fpsCounter = 0;
+
+ generateLensPixmap();
+}
+
+void PathDeformRenderer::setText(const QString &text)
+{
+ m_text = text;
+
+ QFont f("times new roman,utopia");
+ f.setStyleStrategy(QFont::ForceOutline);
+ f.setPointSize(m_fontSize);
+ f.setStyleHint(QFont::Times);
+
+ QFontMetrics fm(f);
+
+ m_paths.clear();
+ m_pathBounds = QRect();
+
+ QPointF advance(0, 0);
+
+ bool do_quick = true;
+ for (int i=0; i<text.size(); ++i) {
+ if (text.at(i).unicode() >= 0x4ff && text.at(i).unicode() <= 0x1e00) {
+ do_quick = false;
+ break;
+ }
+ }
+
+ if (do_quick) {
+ for (int i=0; i<text.size(); ++i) {
+ QPainterPath path;
+ path.addText(advance, f, text.mid(i, 1));
+ m_pathBounds |= path.boundingRect();
+ m_paths << path;
+ advance += QPointF(fm.width(text.mid(i, 1)), 0);
+ }
+ } else {
+ QPainterPath path;
+ path.addText(advance, f, text);
+ m_pathBounds |= path.boundingRect();
+ m_paths << path;
+ }
+
+ for (int i=0; i<m_paths.size(); ++i)
+ m_paths[i] = m_paths[i] * QMatrix(1, 0, 0, 1, -m_pathBounds.x(), -m_pathBounds.y());
+
+ update();
+}
+
+
+void PathDeformRenderer::generateLensPixmap()
+{
+ qreal rad = m_radius + LENS_EXTENT;
+
+ QRect bounds = circle_bounds(QPointF(), rad, 0);
+
+ QPainter painter;
+
+ if (preferImage()) {
+ m_lens_image = QImage(bounds.size(), QImage::Format_ARGB32_Premultiplied);
+ m_lens_image.fill(0);
+ painter.begin(&m_lens_image);
+ } else {
+ m_lens_pixmap = QPixmap(bounds.size());
+ m_lens_pixmap.fill(Qt::transparent);
+ painter.begin(&m_lens_pixmap);
+ }
+
+ QRadialGradient gr(rad, rad, rad, 3 * rad / 5, 3 * rad / 5);
+ gr.setColorAt(0.0, QColor(255, 255, 255, 191));
+ gr.setColorAt(0.2, QColor(255, 255, 127, 191));
+ gr.setColorAt(0.9, QColor(150, 150, 200, 63));
+ gr.setColorAt(0.95, QColor(0, 0, 0, 127));
+ gr.setColorAt(1, QColor(0, 0, 0, 0));
+ painter.setRenderHint(QPainter::Antialiasing);
+ painter.setBrush(gr);
+ painter.setPen(Qt::NoPen);
+ painter.drawEllipse(0, 0, bounds.width(), bounds.height());
+}
+
+
+void PathDeformRenderer::setAnimated(bool animated)
+{
+ m_animated = animated;
+
+ if (m_animated) {
+// m_fpsTimer.start(1000, this);
+// m_fpsCounter = 0;
+ m_repaintTimer.start(25, this);
+ m_repaintTracker.start();
+ } else {
+// m_fpsTimer.stop();
+ m_repaintTimer.stop();
+ }
+}
+
+void PathDeformRenderer::timerEvent(QTimerEvent *e)
+{
+
+ if (e->timerId() == m_repaintTimer.timerId()) {
+
+ if (QLineF(QPointF(0,0), m_direction).length() > 1)
+ m_direction *= 0.995;
+ qreal time = m_repaintTracker.restart();
+
+ QRect rectBefore = circle_bounds(m_pos, m_radius, m_fontSize);
+
+ qreal dx = m_direction.x();
+ qreal dy = m_direction.y();
+ if (time > 0) {
+ dx = dx * time * .1;
+ dy = dy * time * .1;
+ }
+
+ m_pos += QPointF(dx, dy);
+
+
+
+ if (m_pos.x() - m_radius < 0) {
+ m_direction.setX(-m_direction.x());
+ m_pos.setX(m_radius);
+ } else if (m_pos.x() + m_radius > width()) {
+ m_direction.setX(-m_direction.x());
+ m_pos.setX(width() - m_radius);
+ }
+
+ if (m_pos.y() - m_radius < 0) {
+ m_direction.setY(-m_direction.y());
+ m_pos.setY(m_radius);
+ } else if (m_pos.y() + m_radius > height()) {
+ m_direction.setY(-m_direction.y());
+ m_pos.setY(height() - m_radius);
+ }
+
+#ifdef QT_OPENGL_SUPPORT
+ if (usesOpenGL()) {
+ update();
+ } else
+#endif
+ {
+ QRect rectAfter = circle_bounds(m_pos, m_radius, m_fontSize);
+ update(rectAfter | rectBefore);
+ QApplication::syncX();
+ }
+ }
+// else if (e->timerId() == m_fpsTimer.timerId()) {
+// printf("fps: %d\n", m_fpsCounter);
+// emit frameRate(m_fpsCounter);
+// m_fpsCounter = 0;
+
+// }
+}
+
+void PathDeformRenderer::mousePressEvent(QMouseEvent *e)
+{
+ setDescriptionEnabled(false);
+
+ m_repaintTimer.stop();
+ m_offset = QPointF();
+ if (QLineF(m_pos, e->pos()).length() <= m_radius)
+ m_offset = m_pos - e->pos();
+
+ m_mousePress = e->pos();
+
+ // If we're not running in small screen mode, always assume we're dragging
+ m_mouseDrag = !m_smallScreen;
+
+ mouseMoveEvent(e);
+}
+
+void PathDeformRenderer::mouseReleaseEvent(QMouseEvent *e)
+{
+ if (e->buttons() == Qt::NoButton && m_animated) {
+ m_repaintTimer.start(10, this);
+ m_repaintTracker.start();
+ }
+
+ if (!m_mouseDrag && m_smallScreen)
+ emit clicked();
+}
+
+void PathDeformRenderer::mouseMoveEvent(QMouseEvent *e)
+{
+ if (!m_mouseDrag && (QLineF(m_mousePress, e->pos()).length() > 25.0) )
+ m_mouseDrag = true;
+
+ if (m_mouseDrag) {
+ QRect rectBefore = circle_bounds(m_pos, m_radius, m_fontSize);
+ if (e->type() == QEvent::MouseMove) {
+ QLineF line(m_pos, e->pos() + m_offset);
+ line.setLength(line.length() * .1);
+ QPointF dir(line.dx(), line.dy());
+ m_direction = (m_direction + dir) / 2;
+ }
+ m_pos = e->pos() + m_offset;
+#ifdef QT_OPENGL_SUPPORT
+ if (usesOpenGL()) {
+ update();
+ } else
+#endif
+ {
+ QRect rectAfter = circle_bounds(m_pos, m_radius, m_fontSize);
+ update(rectBefore | rectAfter);
+ }
+ }
+}
+
+QPainterPath PathDeformRenderer::lensDeform(const QPainterPath &source, const QPointF &offset)
+{
+ QPainterPath path;
+ path.addPath(source);
+
+ qreal flip = m_intensity / qreal(100);
+
+ for (int i=0; i<path.elementCount(); ++i) {
+ const QPainterPath::Element &e = path.elementAt(i);
+
+ qreal x = e.x + offset.x();
+ qreal y = e.y + offset.y();
+
+ qreal dx = x - m_pos.x();
+ qreal dy = y - m_pos.y();
+ qreal len = m_radius - qSqrt(dx * dx + dy * dy);
+
+ if (len > 0) {
+ path.setElementPositionAt(i,
+ x + flip * dx * len / m_radius,
+ y + flip * dy * len / m_radius);
+ } else {
+ path.setElementPositionAt(i, x, y);
+ }
+
+ }
+
+ return path;
+}
+
+
+void PathDeformRenderer::paint(QPainter *painter)
+{
+ int pad_x = 5;
+ int pad_y = 5;
+
+ int skip_x = qRound(m_pathBounds.width() + pad_x + m_fontSize/2);
+ int skip_y = qRound(m_pathBounds.height() + pad_y);
+
+ painter->setPen(Qt::NoPen);
+ painter->setBrush(Qt::black);
+
+ QRectF clip(painter->clipPath().boundingRect());
+
+ int overlap = pad_x / 2;
+
+ for (int start_y=0; start_y < height(); start_y += skip_y) {
+
+ if (start_y > clip.bottom())
+ break;
+
+ int start_x = -overlap;
+ for (; start_x < width(); start_x += skip_x) {
+
+ if (start_y + skip_y >= clip.top() &&
+ start_x + skip_x >= clip.left() &&
+ start_x <= clip.right()) {
+ for (int i=0; i<m_paths.size(); ++i) {
+ QPainterPath path = lensDeform(m_paths[i], QPointF(start_x, start_y));
+ painter->drawPath(path);
+ }
+ }
+ }
+ overlap = skip_x - (start_x - width());
+
+ }
+
+ if (preferImage()) {
+ painter->drawImage(m_pos - QPointF(m_radius + LENS_EXTENT, m_radius + LENS_EXTENT),
+ m_lens_image);
+ } else {
+ painter->drawPixmap(m_pos - QPointF(m_radius + LENS_EXTENT, m_radius + LENS_EXTENT),
+ m_lens_pixmap);
+ }
+}
+
+
+
+void PathDeformRenderer::setRadius(int radius)
+{
+ qreal max = qMax(m_radius, (qreal)radius);
+ m_radius = radius;
+ generateLensPixmap();
+ if (!m_animated || m_radius < max) {
+#ifdef QT_OPENGL_SUPPORT
+ if (usesOpenGL()) {
+ update();
+ } else
+#endif
+ {
+ update(circle_bounds(m_pos, max, m_fontSize));
+ }
+ }
+}
+
+void PathDeformRenderer::setIntensity(int intensity)
+{
+ m_intensity = intensity;
+ if (!m_animated) {
+#ifdef QT_OPENGL_SUPPORT
+ if (usesOpenGL()) {
+ update();
+ } else
+#endif
+ {
+ update(circle_bounds(m_pos, m_radius, m_fontSize));
+ }
+ }
+}
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