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Diffstat (limited to 'src/shared/qtgradienteditor/qtgradientwidget.cpp')
| -rw-r--r-- | src/shared/qtgradienteditor/qtgradientwidget.cpp | 815 |
1 files changed, 815 insertions, 0 deletions
diff --git a/src/shared/qtgradienteditor/qtgradientwidget.cpp b/src/shared/qtgradienteditor/qtgradientwidget.cpp new file mode 100644 index 000000000..d9056a703 --- /dev/null +++ b/src/shared/qtgradienteditor/qtgradientwidget.cpp @@ -0,0 +1,815 @@ +/**************************************************************************** +** +** 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 tools 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 "qtgradientwidget.h" +#include <QtCore/QMap> +#include <QtGui/QImage> +#include <QtGui/QPainter> +#include <QtGui/QScrollBar> +#include <QtGui/QMouseEvent> + +#define _USE_MATH_DEFINES + + +#include "math.h" + +#ifndef M_PI +#define M_PI 3.14159265358979323846 +#endif + +QT_BEGIN_NAMESPACE + +class QtGradientWidgetPrivate +{ + QtGradientWidget *q_ptr; + Q_DECLARE_PUBLIC(QtGradientWidget) +public: + QPointF fromViewport(const QPointF &point) const; + QPointF toViewport(const QPointF &point) const; +// void setupDrag(QtGradientStop *stop, int x); + + QPointF checkRange(const QPointF &point) const; + QRectF pointRect(const QPointF &point, double size) const; + + double correctAngle(double angle) const; + void setAngleConical(double angle); + + void paintPoint(QPainter *painter, const QPointF &point, double size) const; + + double m_handleSize; + bool m_backgroundCheckered; + + QGradientStops m_gradientStops; + QGradient::Type m_gradientType; + QGradient::Spread m_gradientSpread; + QPointF m_startLinear; + QPointF m_endLinear; + QPointF m_centralRadial; + QPointF m_focalRadial; + qreal m_radiusRadial; + QPointF m_centralConical; + qreal m_angleConical; + + enum Handle { + NoHandle, + StartLinearHandle, + EndLinearHandle, + CentralRadialHandle, + FocalRadialHandle, + RadiusRadialHandle, + CentralConicalHandle, + AngleConicalHandle + }; + + Handle m_dragHandle; + QPointF m_dragOffset; + //double m_radiusOffset; + double m_radiusFactor; + double m_dragRadius; + double m_angleOffset; + double m_dragAngle; +}; + +double QtGradientWidgetPrivate::correctAngle(double angle) const +{ + double a = angle; + while (a >= 360) + a -= 360; + while (a < 0) + a += 360; + return a; +} + +void QtGradientWidgetPrivate::setAngleConical(double angle) +{ + double a = correctAngle(angle); + if (m_angleConical == a) + return; + m_angleConical = a; + emit q_ptr->angleConicalChanged(m_angleConical); +} + +QRectF QtGradientWidgetPrivate::pointRect(const QPointF &point, double size) const +{ + return QRectF(point.x() - size / 2, point.y() - size / 2, size, size); +} + +QPointF QtGradientWidgetPrivate::checkRange(const QPointF &point) const +{ + QPointF p = point; + if (p.x() > 1) + p.setX(1); + else if (p.x() < 0) + p.setX(0); + if (p.y() > 1) + p.setY(1); + else if (p.y() < 0) + p.setY(0); + return p; +} + +QPointF QtGradientWidgetPrivate::fromViewport(const QPointF &point) const +{ + QSize size = q_ptr->size(); + return QPointF(point.x() / size.width(), point.y() / size.height()); +} + +QPointF QtGradientWidgetPrivate::toViewport(const QPointF &point) const +{ + QSize size = q_ptr->size(); + return QPointF(point.x() * size.width(), point.y() * size.height()); +} + +void QtGradientWidgetPrivate::paintPoint(QPainter *painter, const QPointF &point, double size) const +{ + QPointF pf = toViewport(point); + QRectF rf = pointRect(pf, size); + + QPen pen; + pen.setWidthF(1); + QColor alphaZero = Qt::white; + alphaZero.setAlpha(0); + + painter->save(); + painter->drawEllipse(rf); + + /* + painter->save(); + + QLinearGradient lgV(0, rf.top(), 0, rf.bottom()); + lgV.setColorAt(0, alphaZero); + lgV.setColorAt(0.25, Qt::white); + lgV.setColorAt(0.25, Qt::white); + lgV.setColorAt(1, alphaZero); + pen.setBrush(lgV); + painter->setPen(pen); + + painter->drawLine(QPointF(pf.x(), rf.top()), QPointF(pf.x(), rf.bottom())); + + QLinearGradient lgH(rf.left(), 0, rf.right(), 0); + lgH.setColorAt(0, alphaZero); + lgH.setColorAt(0.5, Qt::white); + lgH.setColorAt(1, alphaZero); + pen.setBrush(lgH); + painter->setPen(pen); + + painter->drawLine(QPointF(rf.left(), pf.y()), QPointF(rf.right(), pf.y())); + + painter->restore(); + */ + + painter->restore(); +} + +/* +void QtGradientWidgetPrivate::setupDrag(QtGradientStop *stop, int x) +{ + m_model->setCurrentStop(stop); + + int viewportX = qRound(toViewport(stop->position())); + m_dragOffset = x - viewportX; + + QList<QtGradientStop *> stops = m_stops; + m_stops.clear(); + QListIterator<QtGradientStop *> itStop(stops); + while (itStop.hasNext()) { + QtGradientStop *s = itStop.next(); + if (m_model->isSelected(s) || s == stop) { + m_dragStops[s] = s->position() - stop->position(); + m_stops.append(s); + } else { + m_dragOriginal[s->position()] = s->color(); + } + } + itStop.toFront(); + while (itStop.hasNext()) { + QtGradientStop *s = itStop.next(); + if (!m_model->isSelected(s)) + m_stops.append(s); + } + m_stops.removeAll(stop); + m_stops.prepend(stop); +} +*/ +//////////////////////////// + +QtGradientWidget::QtGradientWidget(QWidget *parent) + : QWidget(parent), d_ptr(new QtGradientWidgetPrivate) +{ + d_ptr->q_ptr = this; + d_ptr->m_backgroundCheckered = true; + d_ptr->m_handleSize = 20.0; + d_ptr->m_gradientType = QGradient::LinearGradient; + d_ptr->m_startLinear = QPointF(0, 0); + d_ptr->m_endLinear = QPointF(1, 1); + d_ptr->m_centralRadial = QPointF(0.5, 0.5); + d_ptr->m_focalRadial = QPointF(0.5, 0.5); + d_ptr->m_radiusRadial = 0.5; + d_ptr->m_centralConical = QPointF(0.5, 0.5); + d_ptr->m_angleConical = 0; + d_ptr->m_dragHandle = QtGradientWidgetPrivate::NoHandle; + + setSizePolicy(QSizePolicy(QSizePolicy::Preferred, QSizePolicy::Preferred)); +} + +QtGradientWidget::~QtGradientWidget() +{ +} + +QSize QtGradientWidget::sizeHint() const +{ + return QSize(176, 176); +} + +QSize QtGradientWidget::minimumSizeHint() const +{ + return QSize(128, 128); +} + +int QtGradientWidget::heightForWidth(int w) const +{ + return w; +} + +void QtGradientWidget::setBackgroundCheckered(bool checkered) +{ + if (d_ptr->m_backgroundCheckered == checkered) + return; + d_ptr->m_backgroundCheckered = checkered; + update(); +} + +bool QtGradientWidget::isBackgroundCheckered() const +{ + return d_ptr->m_backgroundCheckered; +} + +void QtGradientWidget::mousePressEvent(QMouseEvent *e) +{ + if (e->button() != Qt::LeftButton) + return; + + QPoint p = e->pos(); + if (d_ptr->m_gradientType == QGradient::LinearGradient) { + QPointF startPoint = d_ptr->toViewport(d_ptr->m_startLinear); + double x = p.x() - startPoint.x(); + double y = p.y() - startPoint.y(); + + if ((d_ptr->m_handleSize * d_ptr->m_handleSize / 4) > (x * x + y * y)) { + d_ptr->m_dragHandle = QtGradientWidgetPrivate::StartLinearHandle; + d_ptr->m_dragOffset = QPointF(x, y); + update(); + return; + } + + QPointF endPoint = d_ptr->toViewport(d_ptr->m_endLinear); + x = p.x() - endPoint.x(); + y = p.y() - endPoint.y(); + + if ((d_ptr->m_handleSize * d_ptr->m_handleSize / 4) > (x * x + y * y)) { + d_ptr->m_dragHandle = QtGradientWidgetPrivate::EndLinearHandle; + d_ptr->m_dragOffset = QPointF(x, y); + update(); + return; + } + } else if (d_ptr->m_gradientType == QGradient::RadialGradient) { + QPointF focalPoint = d_ptr->toViewport(d_ptr->m_focalRadial); + double x = p.x() - focalPoint.x(); + double y = p.y() - focalPoint.y(); + + if ((d_ptr->m_handleSize * d_ptr->m_handleSize / 9) > (x * x + y * y)) { + d_ptr->m_dragHandle = QtGradientWidgetPrivate::FocalRadialHandle; + d_ptr->m_dragOffset = QPointF(x, y); + update(); + return; + } + + QPointF centralPoint = d_ptr->toViewport(d_ptr->m_centralRadial); + x = p.x() - centralPoint.x(); + y = p.y() - centralPoint.y(); + + if ((d_ptr->m_handleSize * d_ptr->m_handleSize / 4) > (x * x + y * y)) { + d_ptr->m_dragHandle = QtGradientWidgetPrivate::CentralRadialHandle; + d_ptr->m_dragOffset = QPointF(x, y); + update(); + return; + } + + QPointF central = d_ptr->toViewport(d_ptr->m_centralRadial); + QRectF r = d_ptr->pointRect(central, 2 * d_ptr->m_handleSize / 3); + QRectF r1(0, r.y(), size().width(), r.height()); + QRectF r2(r.x(), 0, r.width(), r.y()); + QRectF r3(r.x(), r.y() + r.height(), r.width(), size().height() - r.y() - r.height()); + QPointF pF(p.x(), p.y()); + if (r1.contains(pF) || r2.contains(pF) || r3.contains(pF)) { + x = pF.x() / size().width() - d_ptr->m_centralRadial.x(); + y = pF.y() / size().height() - d_ptr->m_centralRadial.y(); + double clickRadius = sqrt(x * x + y * y); + //d_ptr->m_radiusOffset = d_ptr->m_radiusRadial - clickRadius; + d_ptr->m_radiusFactor = d_ptr->m_radiusRadial / clickRadius; + if (d_ptr->m_radiusFactor == 0) + d_ptr->m_radiusFactor = 1; + d_ptr->m_dragRadius = d_ptr->m_radiusRadial; + d_ptr->m_dragHandle = QtGradientWidgetPrivate::RadiusRadialHandle; + mouseMoveEvent(e); + update(); + return; + } + } else if (d_ptr->m_gradientType == QGradient::ConicalGradient) { + QPointF centralPoint = d_ptr->toViewport(d_ptr->m_centralConical); + double x = p.x() - centralPoint.x(); + double y = p.y() - centralPoint.y(); + + if ((d_ptr->m_handleSize * d_ptr->m_handleSize / 4) > (x * x + y * y)) { + d_ptr->m_dragHandle = QtGradientWidgetPrivate::CentralConicalHandle; + d_ptr->m_dragOffset = QPointF(x, y); + update(); + return; + } + double radius = size().width(); + if (size().height() < radius) + radius = size().height(); + radius /= 2; + double corr = d_ptr->m_handleSize / 3; + radius -= corr; + QPointF vp = d_ptr->toViewport(d_ptr->m_centralConical); + x = p.x() - vp.x(); + y = p.y() - vp.y(); + if (((radius - corr) * (radius - corr) < (x * x + y * y)) && + ((radius + corr) * (radius + corr) > (x * x + y * y))) { + QPointF central = d_ptr->toViewport(d_ptr->m_centralConical); + QPointF current(e->pos().x(), e->pos().y()); + x = current.x() - central.x(); + y = current.y() - central.y(); + x /= size().width() / 2; + y /= size().height() / 2; + double r = sqrt(x * x + y * y); + + double arcSin = asin(y / r); + double arcCos = acos(x / r); + + double angle = arcCos * 180 / M_PI; + if (arcSin > 0) { + angle = -angle; + } + + d_ptr->m_angleOffset = d_ptr->m_angleConical - angle; + d_ptr->m_dragAngle = d_ptr->m_angleConical; + d_ptr->m_dragHandle = QtGradientWidgetPrivate::AngleConicalHandle; + update(); + return; + } + } +} + +void QtGradientWidget::mouseReleaseEvent(QMouseEvent *e) +{ + Q_UNUSED(e) + d_ptr->m_dragHandle = QtGradientWidgetPrivate::NoHandle; + update(); +} + +void QtGradientWidget::mouseMoveEvent(QMouseEvent *e) +{ + if (d_ptr->m_dragHandle == QtGradientWidgetPrivate::NoHandle) + return; + + QPointF newPos = QPointF((double)e->pos().x() - d_ptr->m_dragOffset.x(), + (double)e->pos().y() - d_ptr->m_dragOffset.y()); + QPointF newPoint = d_ptr->fromViewport(newPos); + if (newPoint.x() < 0) + newPoint.setX(0); + else if (newPoint.x() > 1) + newPoint.setX(1); + if (newPoint.y() < 0) + newPoint.setY(0); + else if (newPoint.y() > 1) + newPoint.setY(1); + + if (d_ptr->m_dragHandle == QtGradientWidgetPrivate::StartLinearHandle) { + d_ptr->m_startLinear = newPoint; + emit startLinearChanged(newPoint); + } else if (d_ptr->m_dragHandle == QtGradientWidgetPrivate::EndLinearHandle) { + d_ptr->m_endLinear = newPoint; + emit endLinearChanged(newPoint); + } else if (d_ptr->m_dragHandle == QtGradientWidgetPrivate::CentralRadialHandle) { + d_ptr->m_centralRadial = newPoint; + emit centralRadialChanged(newPoint); + } else if (d_ptr->m_dragHandle == QtGradientWidgetPrivate::FocalRadialHandle) { + d_ptr->m_focalRadial = newPoint; + emit focalRadialChanged(newPoint); + } else if (d_ptr->m_dragHandle == QtGradientWidgetPrivate::RadiusRadialHandle) { + QPointF centralPoint = d_ptr->toViewport(d_ptr->m_centralRadial); + QPointF pF(e->pos().x(), e->pos().y()); + double x = pF.x() - centralPoint.x(); + double y = pF.y() - centralPoint.y(); + + if ((d_ptr->m_handleSize * d_ptr->m_handleSize / 4) > (x * x + y * y)) { + if (d_ptr->m_radiusRadial != d_ptr->m_dragRadius) { + d_ptr->m_radiusRadial = d_ptr->m_dragRadius; + emit radiusRadialChanged(d_ptr->m_radiusRadial); + } + } else { + x = pF.x() / size().width() - d_ptr->m_centralRadial.x(); + y = pF.y() / size().height() - d_ptr->m_centralRadial.y(); + double moveRadius = sqrt(x * x + y * y); + //double newRadius = moveRadius + d_ptr->m_radiusOffset; + double newRadius = moveRadius * d_ptr->m_radiusFactor; + if (newRadius > 2) + newRadius = 2; + d_ptr->m_radiusRadial = newRadius; + emit radiusRadialChanged(d_ptr->m_radiusRadial); + } + } else if (d_ptr->m_dragHandle == QtGradientWidgetPrivate::CentralConicalHandle) { + d_ptr->m_centralConical = newPoint; + emit centralConicalChanged(newPoint); + } else if (d_ptr->m_dragHandle == QtGradientWidgetPrivate::AngleConicalHandle) { + QPointF centralPoint = d_ptr->toViewport(d_ptr->m_centralConical); + QPointF pF(e->pos().x(), e->pos().y()); + double x = pF.x() - centralPoint.x(); + double y = pF.y() - centralPoint.y(); + + if ((d_ptr->m_handleSize * d_ptr->m_handleSize / 4) > (x * x + y * y)) { + if (d_ptr->m_angleConical != d_ptr->m_dragAngle) { + d_ptr->m_angleConical = d_ptr->m_dragAngle; + emit angleConicalChanged(d_ptr->m_angleConical); + } + } else { + QPointF central = d_ptr->toViewport(d_ptr->m_centralConical); + QPointF current = pF; + x = current.x() - central.x(); + y = current.y() - central.y(); + x /= size().width() / 2; + y /= size().height() / 2; + double r = sqrt(x * x + y * y); + + double arcSin = asin(y / r); + double arcCos = acos(x / r); + + double angle = arcCos * 180 / M_PI; + if (arcSin > 0) { + angle = -angle; + } + + angle += d_ptr->m_angleOffset; + + d_ptr->setAngleConical(angle); + } + } + update(); +} + +void QtGradientWidget::mouseDoubleClickEvent(QMouseEvent *e) +{ + mousePressEvent(e); +} + +void QtGradientWidget::paintEvent(QPaintEvent *e) +{ + Q_UNUSED(e) + + QPainter p(this); + + if (d_ptr->m_backgroundCheckered) { + int pixSize = 40; + QPixmap pm(2 * pixSize, 2 * pixSize); + + QPainter pmp(&pm); + pmp.fillRect(0, 0, pixSize, pixSize, Qt::white); + pmp.fillRect(pixSize, pixSize, pixSize, pixSize, Qt::white); + pmp.fillRect(0, pixSize, pixSize, pixSize, Qt::black); + pmp.fillRect(pixSize, 0, pixSize, pixSize, Qt::black); + + p.setBrushOrigin((size().width() % pixSize + pixSize) / 2, (size().height() % pixSize + pixSize) / 2); + p.fillRect(rect(), pm); + p.setBrushOrigin(0, 0); + } + + QGradient *gradient = 0; + switch (d_ptr->m_gradientType) { + case QGradient::LinearGradient: + gradient = new QLinearGradient(d_ptr->m_startLinear, d_ptr->m_endLinear); + break; + case QGradient::RadialGradient: + gradient = new QRadialGradient(d_ptr->m_centralRadial, d_ptr->m_radiusRadial, d_ptr->m_focalRadial); + break; + case QGradient::ConicalGradient: + gradient = new QConicalGradient(d_ptr->m_centralConical, d_ptr->m_angleConical); + break; + default: + break; + } + if (!gradient) + return; + + gradient->setStops(d_ptr->m_gradientStops); + gradient->setSpread(d_ptr->m_gradientSpread); + + p.save(); + p.scale(size().width(), size().height()); + p.fillRect(QRect(0, 0, 1, 1), *gradient); + p.restore(); + + p.setRenderHint(QPainter::Antialiasing); + + QColor c = QColor::fromRgbF(0.5, 0.5, 0.5, 0.5); + QBrush br(c); + p.setBrush(br); + QPen pen(Qt::white); + pen.setWidthF(1); + p.setPen(pen); + QPen dragPen = pen; + dragPen.setWidthF(2); + if (d_ptr->m_gradientType == QGradient::LinearGradient) { + p.save(); + if (d_ptr->m_dragHandle == QtGradientWidgetPrivate::StartLinearHandle) + p.setPen(dragPen); + d_ptr->paintPoint(&p, d_ptr->m_startLinear, d_ptr->m_handleSize); + p.restore(); + + p.save(); + if (d_ptr->m_dragHandle == QtGradientWidgetPrivate::EndLinearHandle) + p.setPen(dragPen); + d_ptr->paintPoint(&p, d_ptr->m_endLinear, d_ptr->m_handleSize); + p.restore(); + } else if (d_ptr->m_gradientType == QGradient::RadialGradient) { + QPointF central = d_ptr->toViewport(d_ptr->m_centralRadial); + + p.save(); + QRectF r = d_ptr->pointRect(central, 2 * d_ptr->m_handleSize / 3); + QRectF r1(0, r.y(), size().width(), r.height()); + QRectF r2(r.x(), 0, r.width(), r.y()); + QRectF r3(r.x(), r.y() + r.height(), r.width(), size().height() - r.y() - r.height()); + p.fillRect(r1, c); + p.fillRect(r2, c); + p.fillRect(r3, c); + p.setBrush(Qt::NoBrush); + p.save(); + if (d_ptr->m_dragHandle == QtGradientWidgetPrivate::CentralRadialHandle) + p.setPen(dragPen); + d_ptr->paintPoint(&p, d_ptr->m_centralRadial, d_ptr->m_handleSize); + p.restore(); + + QRectF rect = QRectF(central.x() - d_ptr->m_radiusRadial * size().width(), + central.y() - d_ptr->m_radiusRadial * size().height(), + 2 * d_ptr->m_radiusRadial * size().width(), + 2 * d_ptr->m_radiusRadial * size().height()); + p.setClipRect(r1); + p.setClipRect(r2, Qt::UniteClip); + p.setClipRect(r3, Qt::UniteClip); + p.drawEllipse(rect); + if (d_ptr->m_dragHandle == QtGradientWidgetPrivate::RadiusRadialHandle) { + p.save(); + p.setPen(dragPen); + QRectF rect = QRectF(central.x() - d_ptr->m_radiusRadial / d_ptr->m_radiusFactor * size().width(), + central.y() - d_ptr->m_radiusRadial / d_ptr->m_radiusFactor * size().height(), + 2 * d_ptr->m_radiusRadial / d_ptr->m_radiusFactor * size().width(), + 2 * d_ptr->m_radiusRadial / d_ptr->m_radiusFactor * size().height()); + p.drawEllipse(rect); + + p.restore(); + } + p.restore(); + + p.save(); + if (d_ptr->m_dragHandle == QtGradientWidgetPrivate::FocalRadialHandle) + p.setPen(dragPen); + d_ptr->paintPoint(&p, d_ptr->m_focalRadial, 2 * d_ptr->m_handleSize / 3); + p.restore(); + } else if (d_ptr->m_gradientType == QGradient::ConicalGradient) { + double radius = size().width(); + if (size().height() < radius) + radius = size().height(); + radius /= 2; + double corr = d_ptr->m_handleSize / 3; + radius -= corr; + QPointF central = d_ptr->toViewport(d_ptr->m_centralConical); + + p.save(); + p.setBrush(Qt::NoBrush); + QPen pen2(c); + pen2.setWidthF(2 * d_ptr->m_handleSize / 3); + p.setPen(pen2); + p.drawEllipse(d_ptr->pointRect(central, 2 * radius)); + p.restore(); + + p.save(); + p.setBrush(Qt::NoBrush); + int pointCount = 2; + for (int i = 0; i < pointCount; i++) { + QPointF ang(cos(M_PI * (i * 180.0 / pointCount + d_ptr->m_angleConical) / 180) * size().width() / 2, + -sin(M_PI * (i * 180.0 / pointCount + d_ptr->m_angleConical) / 180) * size().height() / 2); + double mod = sqrt(ang.x() * ang.x() + ang.y() * ang.y()); + p.drawLine(QPointF(central.x() + ang.x() * (radius - corr) / mod, + central.y() + ang.y() * (radius - corr) / mod), + QPointF(central.x() + ang.x() * (radius + corr) / mod, + central.y() + ang.y() * (radius + corr) / mod)); + p.drawLine(QPointF(central.x() - ang.x() * (radius - corr) / mod, + central.y() - ang.y() * (radius - corr) / mod), + QPointF(central.x() - ang.x() * (radius + corr) / mod, + central.y() - ang.y() * (radius + corr) / mod)); + } + if (d_ptr->m_dragHandle == QtGradientWidgetPrivate::AngleConicalHandle) { + p.save(); + p.setPen(dragPen); + QPointF ang(cos(M_PI * (d_ptr->m_angleConical - d_ptr->m_angleOffset) / 180) * size().width() / 2, + -sin(M_PI * (d_ptr->m_angleConical - d_ptr->m_angleOffset) / 180) * size().height() / 2); + double mod = sqrt(ang.x() * ang.x() + ang.y() * ang.y()); + p.drawLine(QPointF(central.x() + ang.x() * (radius - corr) / mod, + central.y() + ang.y() * (radius - corr) / mod), + QPointF(central.x() + ang.x() * (radius + corr) / mod, + central.y() + ang.y() * (radius + corr) / mod)); + p.restore(); + } + + p.restore(); + + p.save(); + if (d_ptr->m_dragHandle == QtGradientWidgetPrivate::CentralConicalHandle) + p.setPen(dragPen); + d_ptr->paintPoint(&p, d_ptr->m_centralConical, d_ptr->m_handleSize); + p.restore(); + + } + + delete gradient; +} + +void QtGradientWidget::setGradientStops(const QGradientStops &stops) +{ + d_ptr->m_gradientStops = stops; + update(); +} + +QGradientStops QtGradientWidget::gradientStops() const +{ + return d_ptr->m_gradientStops; +} + +void QtGradientWidget::setGradientType(QGradient::Type type) +{ + if (type == QGradient::NoGradient) + return; + if (d_ptr->m_gradientType == type) + return; + + d_ptr->m_gradientType = type; + update(); +} + +QGradient::Type QtGradientWidget::gradientType() const +{ + return d_ptr->m_gradientType; +} + +void QtGradientWidget::setGradientSpread(QGradient::Spread spread) +{ + if (d_ptr->m_gradientSpread == spread) + return; + + d_ptr->m_gradientSpread = spread; + update(); +} + +QGradient::Spread QtGradientWidget::gradientSpread() const +{ + return d_ptr->m_gradientSpread; +} + +void QtGradientWidget::setStartLinear(const QPointF &point) +{ + if (d_ptr->m_startLinear == point) + return; + + d_ptr->m_startLinear = d_ptr->checkRange(point); + update(); +} + +QPointF QtGradientWidget::startLinear() const +{ + return d_ptr->m_startLinear; +} + +void QtGradientWidget::setEndLinear(const QPointF &point) +{ + if (d_ptr->m_endLinear == point) + return; + + d_ptr->m_endLinear = d_ptr->checkRange(point); + update(); +} + +QPointF QtGradientWidget::endLinear() const +{ + return d_ptr->m_endLinear; +} + +void QtGradientWidget::setCentralRadial(const QPointF &point) +{ + if (d_ptr->m_centralRadial == point) + return; + + d_ptr->m_centralRadial = point; + update(); +} + +QPointF QtGradientWidget::centralRadial() const +{ + return d_ptr->m_centralRadial; +} + +void QtGradientWidget::setFocalRadial(const QPointF &point) +{ + if (d_ptr->m_focalRadial == point) + return; + + d_ptr->m_focalRadial = point; + update(); +} + +QPointF QtGradientWidget::focalRadial() const +{ + return d_ptr->m_focalRadial; +} + +void QtGradientWidget::setRadiusRadial(qreal radius) +{ + if (d_ptr->m_radiusRadial == radius) + return; + + d_ptr->m_radiusRadial = radius; + update(); +} + +qreal QtGradientWidget::radiusRadial() const +{ + return d_ptr->m_radiusRadial; +} + +void QtGradientWidget::setCentralConical(const QPointF &point) +{ + if (d_ptr->m_centralConical == point) + return; + + d_ptr->m_centralConical = point; + update(); +} + +QPointF QtGradientWidget::centralConical() const +{ + return d_ptr->m_centralConical; +} + +void QtGradientWidget::setAngleConical(qreal angle) +{ + if (d_ptr->m_angleConical == angle) + return; + + d_ptr->m_angleConical = angle; + update(); +} + +qreal QtGradientWidget::angleConical() const +{ + return d_ptr->m_angleConical; +} + +QT_END_NAMESPACE |