diff -r 000000000000 -r 1918ee327afb tools/shared/qtgradienteditor/qtgradientstopswidget.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/shared/qtgradienteditor/qtgradientstopswidget.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,1154 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 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 "qtgradientstopswidget.h"
+#include "qtgradientstopsmodel.h"
+
+#include <QtCore/QMap>
+#include <QtGui/QImage>
+#include <QtGui/QPainter>
+#include <QtGui/QScrollBar>
+#include <QtGui/QMouseEvent>
+#include <QtGui/QRubberBand>
+#include <QtGui/QMenu>
+
+QT_BEGIN_NAMESPACE
+
+class QtGradientStopsWidgetPrivate
+{
+    QtGradientStopsWidget *q_ptr;
+    Q_DECLARE_PUBLIC(QtGradientStopsWidget)
+public:
+    typedef QMap<qreal, QColor> PositionColorMap;
+    typedef QMap<QtGradientStop *, qreal> StopPositionMap;
+
+    void slotStopAdded(QtGradientStop *stop);
+    void slotStopRemoved(QtGradientStop *stop);
+    void slotStopMoved(QtGradientStop *stop, qreal newPos);
+    void slotStopsSwapped(QtGradientStop *stop1, QtGradientStop *stop2);
+    void slotStopChanged(QtGradientStop *stop, const QColor &newColor);
+    void slotStopSelected(QtGradientStop *stop, bool selected);
+    void slotCurrentStopChanged(QtGradientStop *stop);
+    void slotNewStop();
+    void slotDelete();
+    void slotFlipAll();
+    void slotSelectAll();
+    void slotZoomIn();
+    void slotZoomOut();
+    void slotResetZoom();
+
+    double fromViewport(int x) const;
+    double toViewport(double x) const;
+    QtGradientStop *stopAt(const QPoint &viewportPos) const;
+    QList<QtGradientStop *> stopsAt(const QPoint &viewportPos) const;
+    void setupMove(QtGradientStop *stop, int x);
+    void ensureVisible(double x); // x = stop position
+    void ensureVisible(QtGradientStop *stop);
+    QtGradientStop *newStop(const QPoint &viewportPos);
+
+    bool m_backgroundCheckered;
+    QtGradientStopsModel *m_model;
+    double m_handleSize;
+    int m_scaleFactor;
+    double m_zoom;
+
+#ifndef QT_NO_DRAGANDDROP
+    QtGradientStop *m_dragStop;
+    QtGradientStop *m_changedStop;
+    QtGradientStop *m_clonedStop;
+    QtGradientStopsModel *m_dragModel;
+    QColor m_dragColor;
+    void clearDrag();
+    void removeClonedStop();
+    void restoreChangedStop();
+    void changeStop(qreal pos);
+    void cloneStop(qreal pos);
+#endif
+
+    QRubberBand *m_rubber;
+    QPoint m_clickPos;
+
+    QList<QtGradientStop *> m_stops;
+
+    bool m_moving;
+    int m_moveOffset;
+    StopPositionMap m_moveStops;
+
+    PositionColorMap m_moveOriginal;
+};
+
+double QtGradientStopsWidgetPrivate::fromViewport(int x) const
+{
+    QSize size = q_ptr->viewport()->size();
+    int w = size.width();
+    int max = q_ptr->horizontalScrollBar()->maximum();
+    int val = q_ptr->horizontalScrollBar()->value();
+    return ((double)x * m_scaleFactor + w * val) / (w * (m_scaleFactor + max));
+}
+
+double QtGradientStopsWidgetPrivate::toViewport(double x) const
+{
+    QSize size = q_ptr->viewport()->size();
+    int w = size.width();
+    int max = q_ptr->horizontalScrollBar()->maximum();
+    int val = q_ptr->horizontalScrollBar()->value();
+    return w * (x * (m_scaleFactor + max) - val) / m_scaleFactor;
+}
+
+QtGradientStop *QtGradientStopsWidgetPrivate::stopAt(const QPoint &viewportPos) const
+{
+    double posY = m_handleSize / 2;
+    QListIterator<QtGradientStop *> itStop(m_stops);
+    while (itStop.hasNext()) {
+        QtGradientStop *stop = itStop.next();
+
+        double posX = toViewport(stop->position());
+
+        double x = viewportPos.x() - posX;
+        double y = viewportPos.y() - posY;
+
+        if ((m_handleSize * m_handleSize / 4) > (x * x + y * y))
+            return stop;
+    }
+    return 0;
+}
+
+QList<QtGradientStop *> QtGradientStopsWidgetPrivate::stopsAt(const QPoint &viewportPos) const
+{
+    QList<QtGradientStop *> stops;
+    double posY = m_handleSize / 2;
+    QListIterator<QtGradientStop *> itStop(m_stops);
+    while (itStop.hasNext()) {
+        QtGradientStop *stop = itStop.next();
+
+        double posX = toViewport(stop->position());
+
+        double x = viewportPos.x() - posX;
+        double y = viewportPos.y() - posY;
+
+        if ((m_handleSize * m_handleSize / 4) > (x * x + y * y))
+            stops.append(stop);
+    }
+    return stops;
+}
+
+void QtGradientStopsWidgetPrivate::setupMove(QtGradientStop *stop, int x)
+{
+    m_model->setCurrentStop(stop);
+
+    int viewportX = qRound(toViewport(stop->position()));
+    m_moveOffset = 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_moveStops[s] = s->position() - stop->position();
+            m_stops.append(s);
+        } else {
+            m_moveOriginal[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);
+}
+
+void QtGradientStopsWidgetPrivate::ensureVisible(double x)
+{
+    double viewX = toViewport(x);
+    if (viewX < 0 || viewX > q_ptr->viewport()->size().width()) {
+        int max = q_ptr->horizontalScrollBar()->maximum();
+        int newVal = qRound(x * (max + m_scaleFactor) - m_scaleFactor / 2);
+        q_ptr->horizontalScrollBar()->setValue(newVal);
+    }
+}
+
+void QtGradientStopsWidgetPrivate::ensureVisible(QtGradientStop *stop)
+{
+    if (!stop)
+        return;
+    ensureVisible(stop->position());
+}
+
+QtGradientStop *QtGradientStopsWidgetPrivate::newStop(const QPoint &viewportPos)
+{
+    QtGradientStop *copyStop = stopAt(viewportPos);
+    double posX = fromViewport(viewportPos.x());
+    QtGradientStop *stop = m_model->at(posX);
+    if (!stop) {
+        QColor newColor;
+        if (copyStop)
+            newColor = copyStop->color();
+        else
+            newColor = m_model->color(posX);
+        if (!newColor.isValid())
+            newColor = Qt::white;
+        stop = m_model->addStop(posX, newColor);
+    }
+    return stop;
+}
+
+void QtGradientStopsWidgetPrivate::slotStopAdded(QtGradientStop *stop)
+{
+    m_stops.append(stop);
+    q_ptr->viewport()->update();
+}
+
+void QtGradientStopsWidgetPrivate::slotStopRemoved(QtGradientStop *stop)
+{
+    m_stops.removeAll(stop);
+    q_ptr->viewport()->update();
+}
+
+void QtGradientStopsWidgetPrivate::slotStopMoved(QtGradientStop *stop, qreal newPos)
+{
+    Q_UNUSED(stop)
+    Q_UNUSED(newPos)
+    q_ptr->viewport()->update();
+}
+
+void QtGradientStopsWidgetPrivate::slotStopsSwapped(QtGradientStop *stop1, QtGradientStop *stop2)
+{
+    Q_UNUSED(stop1)
+    Q_UNUSED(stop2)
+    q_ptr->viewport()->update();
+}
+
+void QtGradientStopsWidgetPrivate::slotStopChanged(QtGradientStop *stop, const QColor &newColor)
+{
+    Q_UNUSED(stop)
+    Q_UNUSED(newColor)
+    q_ptr->viewport()->update();
+}
+
+void QtGradientStopsWidgetPrivate::slotStopSelected(QtGradientStop *stop, bool selected)
+{
+    Q_UNUSED(stop)
+    Q_UNUSED(selected)
+    q_ptr->viewport()->update();
+}
+
+void QtGradientStopsWidgetPrivate::slotCurrentStopChanged(QtGradientStop *stop)
+{
+    Q_UNUSED(stop)
+
+    if (!m_model)
+        return;
+    q_ptr->viewport()->update();
+    if (stop) {
+        m_stops.removeAll(stop);
+        m_stops.prepend(stop);
+    }
+}
+
+void QtGradientStopsWidgetPrivate::slotNewStop()
+{
+    if (!m_model)
+        return;
+
+    QtGradientStop *stop = newStop(m_clickPos);
+
+    if (!stop)
+        return;
+
+    m_model->clearSelection();
+    m_model->selectStop(stop, true);
+    m_model->setCurrentStop(stop);
+}
+
+void QtGradientStopsWidgetPrivate::slotDelete()
+{
+    if (!m_model)
+        return;
+
+    m_model->deleteStops();
+}
+
+void QtGradientStopsWidgetPrivate::slotFlipAll()
+{
+    if (!m_model)
+        return;
+
+    m_model->flipAll();
+}
+
+void QtGradientStopsWidgetPrivate::slotSelectAll()
+{
+    if (!m_model)
+        return;
+
+    m_model->selectAll();
+}
+
+void QtGradientStopsWidgetPrivate::slotZoomIn()
+{
+    double newZoom = q_ptr->zoom() * 2;
+    if (newZoom > 100)
+        newZoom = 100;
+    if (newZoom == q_ptr->zoom())
+        return;
+
+    q_ptr->setZoom(newZoom);
+    emit q_ptr->zoomChanged(q_ptr->zoom());
+}
+
+void QtGradientStopsWidgetPrivate::slotZoomOut()
+{
+    double newZoom = q_ptr->zoom() / 2;
+    if (newZoom < 1)
+        newZoom = 1;
+    if (newZoom == q_ptr->zoom())
+        return;
+
+    q_ptr->setZoom(newZoom);
+    emit q_ptr->zoomChanged(q_ptr->zoom());
+}
+
+void QtGradientStopsWidgetPrivate::slotResetZoom()
+{
+    if (1 == q_ptr->zoom())
+        return;
+
+    q_ptr->setZoom(1);
+    emit q_ptr->zoomChanged(1);
+}
+
+QtGradientStopsWidget::QtGradientStopsWidget(QWidget *parent)
+    : QAbstractScrollArea(parent), d_ptr(new QtGradientStopsWidgetPrivate)
+{
+    d_ptr->q_ptr = this;
+    d_ptr->m_backgroundCheckered = true;
+    d_ptr->m_model = 0;
+    d_ptr->m_handleSize = 25.0;
+    d_ptr->m_scaleFactor = 1000;
+    d_ptr->m_moving = false;
+    d_ptr->m_zoom = 1;
+    d_ptr->m_rubber = new QRubberBand(QRubberBand::Rectangle, this);
+#ifndef QT_NO_DRAGANDDROP
+    d_ptr->m_dragStop = 0;
+    d_ptr->m_changedStop = 0;
+    d_ptr->m_clonedStop = 0;
+    d_ptr->m_dragModel = 0;
+#endif
+    setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+    setHorizontalScrollBarPolicy(Qt::ScrollBarAsNeeded);
+    horizontalScrollBar()->setRange(0, (int)(d_ptr->m_scaleFactor * (d_ptr->m_zoom - 1) + 0.5));
+    horizontalScrollBar()->setPageStep(d_ptr->m_scaleFactor);
+    horizontalScrollBar()->setSingleStep(4);
+    viewport()->setAutoFillBackground(false);
+
+    setAcceptDrops(true);
+
+    setSizePolicy(QSizePolicy(QSizePolicy::Expanding, QSizePolicy::Preferred));
+}
+
+QtGradientStopsWidget::~QtGradientStopsWidget()
+{
+}
+
+QSize QtGradientStopsWidget::sizeHint() const
+{
+    return QSize(qRound(2 * d_ptr->m_handleSize), qRound(3 * d_ptr->m_handleSize) + horizontalScrollBar()->sizeHint().height());
+}
+
+QSize QtGradientStopsWidget::minimumSizeHint() const
+{
+    return QSize(qRound(2 * d_ptr->m_handleSize), qRound(3 * d_ptr->m_handleSize) + horizontalScrollBar()->minimumSizeHint().height());
+}
+
+void QtGradientStopsWidget::setBackgroundCheckered(bool checkered)
+{
+    if (d_ptr->m_backgroundCheckered == checkered)
+        return;
+    d_ptr->m_backgroundCheckered = checkered;
+    update();
+}
+
+bool QtGradientStopsWidget::isBackgroundCheckered() const
+{
+    return d_ptr->m_backgroundCheckered;
+}
+
+void QtGradientStopsWidget::setGradientStopsModel(QtGradientStopsModel *model)
+{
+    if (d_ptr->m_model == model)
+        return;
+
+    if (d_ptr->m_model) {
+        disconnect(d_ptr->m_model, SIGNAL(stopAdded(QtGradientStop *)),
+                    this, SLOT(slotStopAdded(QtGradientStop *)));
+        disconnect(d_ptr->m_model, SIGNAL(stopRemoved(QtGradientStop *)),
+                    this, SLOT(slotStopRemoved(QtGradientStop *)));
+        disconnect(d_ptr->m_model, SIGNAL(stopMoved(QtGradientStop *, qreal)),
+                    this, SLOT(slotStopMoved(QtGradientStop *, qreal)));
+        disconnect(d_ptr->m_model, SIGNAL(stopsSwapped(QtGradientStop *, QtGradientStop *)),
+                    this, SLOT(slotStopsSwapped(QtGradientStop *, QtGradientStop *)));
+        disconnect(d_ptr->m_model, SIGNAL(stopChanged(QtGradientStop *, const QColor &)),
+                    this, SLOT(slotStopChanged(QtGradientStop *, const QColor &)));
+        disconnect(d_ptr->m_model, SIGNAL(stopSelected(QtGradientStop *, bool)),
+                    this, SLOT(slotStopSelected(QtGradientStop *, bool)));
+        disconnect(d_ptr->m_model, SIGNAL(currentStopChanged(QtGradientStop *)),
+                    this, SLOT(slotCurrentStopChanged(QtGradientStop *)));
+
+        d_ptr->m_stops.clear();
+    }
+
+    d_ptr->m_model = model;
+
+    if (d_ptr->m_model) {
+        connect(d_ptr->m_model, SIGNAL(stopAdded(QtGradientStop *)),
+                    this, SLOT(slotStopAdded(QtGradientStop *)));
+        connect(d_ptr->m_model, SIGNAL(stopRemoved(QtGradientStop *)),
+                    this, SLOT(slotStopRemoved(QtGradientStop *)));
+        connect(d_ptr->m_model, SIGNAL(stopMoved(QtGradientStop *, qreal)),
+                    this, SLOT(slotStopMoved(QtGradientStop *, qreal)));
+        connect(d_ptr->m_model, SIGNAL(stopsSwapped(QtGradientStop *, QtGradientStop *)),
+                    this, SLOT(slotStopsSwapped(QtGradientStop *, QtGradientStop *)));
+        connect(d_ptr->m_model, SIGNAL(stopChanged(QtGradientStop *, const QColor &)),
+                    this, SLOT(slotStopChanged(QtGradientStop *, const QColor &)));
+        connect(d_ptr->m_model, SIGNAL(stopSelected(QtGradientStop *, bool)),
+                    this, SLOT(slotStopSelected(QtGradientStop *, bool)));
+        connect(d_ptr->m_model, SIGNAL(currentStopChanged(QtGradientStop *)),
+                    this, SLOT(slotCurrentStopChanged(QtGradientStop *)));
+
+        QList<QtGradientStop *> stops = d_ptr->m_model->stops().values();
+        QListIterator<QtGradientStop *> itStop(stops);
+        while (itStop.hasNext())
+            d_ptr->slotStopAdded(itStop.next());
+
+        QList<QtGradientStop *> selected = d_ptr->m_model->selectedStops();
+        QListIterator<QtGradientStop *> itSelect(selected);
+        while (itSelect.hasNext())
+            d_ptr->slotStopSelected(itSelect.next(), true);
+
+        d_ptr->slotCurrentStopChanged(d_ptr->m_model->currentStop());
+    }
+}
+
+void QtGradientStopsWidget::mousePressEvent(QMouseEvent *e)
+{
+    typedef QtGradientStopsModel::PositionStopMap PositionStopMap;
+    if (!d_ptr->m_model)
+        return;
+
+    if (e->button() != Qt::LeftButton)
+        return;
+
+    d_ptr->m_moving = true;
+
+    d_ptr->m_moveStops.clear();
+    d_ptr->m_moveOriginal.clear();
+    d_ptr->m_clickPos = e->pos();
+    QtGradientStop *stop = d_ptr->stopAt(e->pos());
+    if (stop) {
+        if (e->modifiers() & Qt::ControlModifier) {
+            d_ptr->m_model->selectStop(stop, !d_ptr->m_model->isSelected(stop));
+        } else if (e->modifiers() & Qt::ShiftModifier) {
+            QtGradientStop *oldCurrent = d_ptr->m_model->currentStop();
+            if (oldCurrent) {
+                PositionStopMap stops = d_ptr->m_model->stops();
+                PositionStopMap::ConstIterator itSt = stops.constFind(oldCurrent->position());
+                if (itSt != stops.constEnd()) {
+                    while (itSt != stops.constFind(stop->position())) {
+                        d_ptr->m_model->selectStop(itSt.value(), true);
+                        if (oldCurrent->position() < stop->position())
+                            ++itSt;
+                        else
+                            --itSt;
+                    }
+                }
+            }
+            d_ptr->m_model->selectStop(stop, true);
+        } else {
+            if (!d_ptr->m_model->isSelected(stop)) {
+                d_ptr->m_model->clearSelection();
+                d_ptr->m_model->selectStop(stop, true);
+            }
+        }
+        d_ptr->setupMove(stop, e->pos().x());
+    } else {
+        d_ptr->m_model->clearSelection();
+        d_ptr->m_rubber->setGeometry(QRect(d_ptr->m_clickPos, QSize()));
+        d_ptr->m_rubber->show();
+    }
+    viewport()->update();
+}
+
+void QtGradientStopsWidget::mouseReleaseEvent(QMouseEvent *e)
+{
+    if (!d_ptr->m_model)
+        return;
+
+    if (e->button() != Qt::LeftButton)
+        return;
+
+    d_ptr->m_moving = false;
+    d_ptr->m_rubber->hide();
+    d_ptr->m_moveStops.clear();
+    d_ptr->m_moveOriginal.clear();
+}
+
+void QtGradientStopsWidget::mouseMoveEvent(QMouseEvent *e)
+{
+    typedef QtGradientStopsWidgetPrivate::PositionColorMap PositionColorMap;
+    typedef QtGradientStopsModel::PositionStopMap PositionStopMap;
+    typedef QtGradientStopsWidgetPrivate::StopPositionMap StopPositionMap;
+    if (!d_ptr->m_model)
+        return;
+
+    if (!(e->buttons() & Qt::LeftButton))
+        return;
+
+    if (!d_ptr->m_moving)
+        return;
+
+    if (!d_ptr->m_moveStops.isEmpty()) {
+        double maxOffset = 0.0;
+        double minOffset = 0.0;
+        bool first = true;
+        StopPositionMap::ConstIterator itStop = d_ptr->m_moveStops.constBegin();
+        while (itStop != d_ptr->m_moveStops.constEnd()) {
+            double offset = itStop.value();
+
+            if (first) {
+                maxOffset = offset;
+                minOffset = offset;
+                first = false;
+            } else {
+                if (maxOffset < offset)
+                    maxOffset = offset;
+                else if (minOffset > offset)
+                    minOffset = offset;
+            }
+            ++itStop;
+        }
+
+        double viewportMin = d_ptr->toViewport(-minOffset);
+        double viewportMax = d_ptr->toViewport(1.0 - maxOffset);
+
+        PositionStopMap newPositions;
+
+        int viewportX = e->pos().x() - d_ptr->m_moveOffset;
+
+        if (viewportX > viewport()->size().width())
+            viewportX = viewport()->size().width();
+        else if (viewportX < 0)
+            viewportX = 0;
+
+        double posX = d_ptr->fromViewport(viewportX);
+
+        if (viewportX > viewportMax)
+            posX = 1.0 - maxOffset;
+        else if (viewportX < viewportMin)
+            posX = -minOffset;
+
+        itStop = d_ptr->m_moveStops.constBegin();
+        while (itStop != d_ptr->m_moveStops.constEnd()) {
+            QtGradientStop *stop = itStop.key();
+
+            newPositions[posX + itStop.value()] = stop;
+
+            ++itStop;
+        }
+
+        bool forward = true;
+        PositionStopMap::ConstIterator itNewPos = newPositions.constBegin();
+        if (itNewPos.value()->position() < itNewPos.key())
+            forward = false;
+
+        itNewPos = forward ? newPositions.constBegin() : newPositions.constEnd();
+        while (itNewPos != (forward ? newPositions.constEnd() : newPositions.constBegin())) {
+            if (!forward)
+                --itNewPos;
+            QtGradientStop *stop = itNewPos.value();
+            double newPos = itNewPos.key();
+            if (newPos > 1)
+                newPos = 1;
+            else if (newPos < 0)
+                newPos = 0;
+
+            QtGradientStop *existingStop = d_ptr->m_model->at(newPos);
+            if (existingStop && !d_ptr->m_moveStops.contains(existingStop))
+                    d_ptr->m_model->removeStop(existingStop);
+            d_ptr->m_model->moveStop(stop, newPos);
+
+            if (forward)
+                ++itNewPos;
+        }
+
+        PositionColorMap::ConstIterator itOld = d_ptr->m_moveOriginal.constBegin();
+        while (itOld != d_ptr->m_moveOriginal.constEnd()) {
+            double position = itOld.key();
+            if (!d_ptr->m_model->at(position))
+                d_ptr->m_model->addStop(position, itOld.value());
+
+            ++itOld;
+        }
+
+    } else {
+        QRect r(QRect(d_ptr->m_clickPos, e->pos()).normalized());
+        r.translate(1, 0);
+        d_ptr->m_rubber->setGeometry(r);
+        //d_ptr->m_model->clearSelection();
+
+        int xv1 = d_ptr->m_clickPos.x();
+        int xv2 = e->pos().x();
+        if (xv1 > xv2) {
+            int temp = xv1;
+            xv1 = xv2;
+            xv2 = temp;
+        }
+        int yv1 = d_ptr->m_clickPos.y();
+        int yv2 = e->pos().y();
+        if (yv1 > yv2) {
+            int temp = yv1;
+            yv1 = yv2;
+            yv2 = temp;
+        }
+
+        QPoint p1, p2;
+
+        if (yv2 < d_ptr->m_handleSize / 2) {
+            p1 = QPoint(xv1, yv2);
+            p2 = QPoint(xv2, yv2);
+        } else if (yv1 > d_ptr->m_handleSize / 2) {
+            p1 = QPoint(xv1, yv1);
+            p2 = QPoint(xv2, yv1);
+        } else {
+            p1 = QPoint(xv1, qRound(d_ptr->m_handleSize / 2));
+            p2 = QPoint(xv2, qRound(d_ptr->m_handleSize / 2));
+        }
+
+        QList<QtGradientStop *> beginList = d_ptr->stopsAt(p1);
+        QList<QtGradientStop *> endList = d_ptr->stopsAt(p2);
+
+        double x1 = d_ptr->fromViewport(xv1);
+        double x2 = d_ptr->fromViewport(xv2);
+
+        QListIterator<QtGradientStop *> itStop(d_ptr->m_stops);
+        while (itStop.hasNext()) {
+            QtGradientStop *stop = itStop.next();
+            if ((stop->position() >= x1 && stop->position() <= x2) ||
+                        beginList.contains(stop) || endList.contains(stop))
+                d_ptr->m_model->selectStop(stop, true);
+            else
+                d_ptr->m_model->selectStop(stop, false);
+        }
+    }
+}
+
+void QtGradientStopsWidget::mouseDoubleClickEvent(QMouseEvent *e)
+{
+    if (!d_ptr->m_model)
+        return;
+
+    if (e->button() != Qt::LeftButton)
+        return;
+
+    if (d_ptr->m_clickPos != e->pos()) {
+        mousePressEvent(e);
+        return;
+    }
+    d_ptr->m_moving = true;
+    d_ptr->m_moveStops.clear();
+    d_ptr->m_moveOriginal.clear();
+
+    QtGradientStop *stop = d_ptr->newStop(e->pos());
+
+    if (!stop)
+        return;
+
+    d_ptr->m_model->clearSelection();
+    d_ptr->m_model->selectStop(stop, true);
+
+    d_ptr->setupMove(stop, e->pos().x());
+
+    viewport()->update();
+}
+
+void QtGradientStopsWidget::keyPressEvent(QKeyEvent *e)
+{
+    typedef QtGradientStopsModel::PositionStopMap PositionStopMap;
+    if (!d_ptr->m_model)
+        return;
+
+    if (e->key() == Qt::Key_Delete || e->key() == Qt::Key_Backspace) {
+        d_ptr->m_model->deleteStops();
+    } else if (e->key() == Qt::Key_Left || e->key() == Qt::Key_Right ||
+                e->key() == Qt::Key_Home || e->key() == Qt::Key_End) {
+        PositionStopMap stops = d_ptr->m_model->stops();
+        if (stops.isEmpty())
+            return;
+        QtGradientStop *newCurrent = 0;
+        QtGradientStop *current = d_ptr->m_model->currentStop();
+        if (!current || e->key() == Qt::Key_Home || e->key() == Qt::Key_End) {
+            if (e->key() == Qt::Key_Left || e->key() == Qt::Key_Home)
+                newCurrent = stops.constBegin().value();
+            else if (e->key() == Qt::Key_Right || e->key() == Qt::Key_End)
+                newCurrent = (--stops.constEnd()).value();
+        } else {
+            PositionStopMap::ConstIterator itStop = stops.constBegin();
+            while (itStop.value() != current)
+                ++itStop;
+            if (e->key() == Qt::Key_Left && itStop != stops.constBegin())
+                --itStop;
+            else if (e->key() == Qt::Key_Right && itStop != --stops.constEnd())
+                ++itStop;
+            newCurrent = itStop.value();
+        }
+        d_ptr->m_model->clearSelection();
+        d_ptr->m_model->selectStop(newCurrent, true);
+        d_ptr->m_model->setCurrentStop(newCurrent);
+        d_ptr->ensureVisible(newCurrent);
+    } else if (e->key() == Qt::Key_A) {
+        if (e->modifiers() & Qt::ControlModifier)
+            d_ptr->m_model->selectAll();
+    }
+}
+
+void QtGradientStopsWidget::paintEvent(QPaintEvent *e)
+{
+    Q_UNUSED(e)
+    if (!d_ptr->m_model)
+        return;
+
+    QtGradientStopsModel *model = d_ptr->m_model;
+#ifndef QT_NO_DRAGANDDROP
+    if (d_ptr->m_dragModel)
+        model = d_ptr->m_dragModel;
+#endif
+
+    QSize size = viewport()->size();
+    int w = size.width();
+    double h = size.height() - d_ptr->m_handleSize;
+    if (w <= 0)
+        return;
+
+    QPixmap pix(size);
+    QPainter p;
+
+    if (d_ptr->m_backgroundCheckered) {
+        int pixSize = 20;
+        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.begin(&pix);
+        p.setBrushOrigin((size.width() % pixSize + pixSize) / 2, (size.height() % pixSize + pixSize) / 2);
+        p.fillRect(viewport()->rect(), pm);
+        p.setBrushOrigin(0, 0);
+    } else {
+        p.begin(viewport());
+    }
+
+    double viewBegin = (double)w * horizontalScrollBar()->value() / d_ptr->m_scaleFactor;
+
+    int val = horizontalScrollBar()->value();
+    int max = horizontalScrollBar()->maximum();
+
+    double begin = (double)val / (d_ptr->m_scaleFactor + max);
+    double end = (double)(val + d_ptr->m_scaleFactor) / (d_ptr->m_scaleFactor + max);
+    double width = end - begin;
+
+    if (h > 0) {
+        QLinearGradient lg(0, 0, w, 0);
+        QMap<qreal, QtGradientStop *> stops = model->stops();
+        QMapIterator<qreal, QtGradientStop *> itStop(stops);
+        while (itStop.hasNext()) {
+            QtGradientStop *stop = itStop.next().value();
+            double pos = stop->position();
+            if (pos >= begin && pos <= end) {
+                double gradPos = (pos - begin) / width;
+                QColor c = stop->color();
+                lg.setColorAt(gradPos, c);
+            }
+            //lg.setColorAt(stop->position(), stop->color());
+        }
+        lg.setColorAt(0, model->color(begin));
+        lg.setColorAt(1, model->color(end));
+        QImage img(w, 1, QImage::Format_ARGB32_Premultiplied);
+        QPainter p1(&img);
+        p1.setCompositionMode(QPainter::CompositionMode_Source);
+
+        /*
+        if (viewBegin != 0)
+            p1.translate(-viewBegin, 0);
+        if (d_ptr->m_zoom != 1)
+            p1.scale(d_ptr->m_zoom, 1);
+            */
+        p1.fillRect(0, 0, w, 1, lg);
+
+        p.fillRect(QRectF(0, d_ptr->m_handleSize, w, h), QPixmap::fromImage(img));
+    }
+
+
+    double handleWidth = d_ptr->m_handleSize * d_ptr->m_scaleFactor / (w * (d_ptr->m_scaleFactor + max));
+
+    QColor insideColor = QColor::fromRgb(0x20, 0x20, 0x20, 0xFF);
+    QColor borderColor = QColor(Qt::white);
+    QColor drawColor;
+    QColor back1 = QColor(Qt::lightGray);
+    QColor back2 = QColor(Qt::darkGray);
+    QColor back = QColor::fromRgb((back1.red() + back2.red()) / 2,
+            (back1.green() + back2.green()) / 2,
+            (back1.blue() + back2.blue()) / 2);
+
+    QPen pen;
+    p.setRenderHint(QPainter::Antialiasing);
+    QListIterator<QtGradientStop *> itStop(d_ptr->m_stops);
+    itStop.toBack();
+    while (itStop.hasPrevious()) {
+        QtGradientStop *stop = itStop.previous();
+        double x = stop->position();
+        if (x >= begin - handleWidth / 2 && x <= end + handleWidth / 2) {
+            double viewX = x * w * (d_ptr->m_scaleFactor + max) / d_ptr->m_scaleFactor - viewBegin;
+            p.save();
+            QColor c = stop->color();
+#ifndef QT_NO_DRAGANDDROP
+            if (stop == d_ptr->m_dragStop)
+                c = d_ptr->m_dragColor;
+#endif
+            if ((0.3 * c.redF() + 0.59 * c.greenF() + 0.11 * c.blueF()) * c.alphaF() +
+                (0.3 * back.redF() + 0.59 * back.greenF() + 0.11 * back.blueF()) * (1.0 - c.alphaF()) < 0.5) {
+                drawColor = QColor::fromRgb(0xC0, 0xC0, 0xC0, 0xB0);
+            } else {
+                drawColor = QColor::fromRgb(0x40, 0x40, 0x40, 0x80);
+            }
+            QRectF rect(viewX - d_ptr->m_handleSize / 2, 0, d_ptr->m_handleSize, d_ptr->m_handleSize);
+            rect.adjust(0.5, 0.5, -0.5, -0.5);
+            if (h > 0) {
+                pen.setWidthF(1);
+                QLinearGradient lg(0, d_ptr->m_handleSize, 0, d_ptr->m_handleSize + h / 2);
+                lg.setColorAt(0, drawColor);
+                QColor alphaZero = drawColor;
+                alphaZero.setAlpha(0);
+                lg.setColorAt(1, alphaZero);
+                pen.setBrush(lg);
+                p.setPen(pen);
+                p.drawLine(QPointF(viewX, d_ptr->m_handleSize), QPointF(viewX, d_ptr->m_handleSize + h / 2));
+
+                pen.setWidthF(1);
+                pen.setBrush(drawColor);
+                p.setPen(pen);
+                QRectF r1 = rect.adjusted(0.5, 0.5, -0.5, -0.5);
+                QRectF r2 = rect.adjusted(1.5, 1.5, -1.5, -1.5);
+                QColor inColor = QColor::fromRgb(0x80, 0x80, 0x80, 0x80);
+                if (!d_ptr->m_model->isSelected(stop)) {
+                    p.setBrush(c);
+                    p.drawEllipse(rect);
+                } else {
+                    pen.setBrush(insideColor);
+                    pen.setWidthF(2);
+                    p.setPen(pen);
+                    p.setBrush(Qt::NoBrush);
+                    p.drawEllipse(r1);
+
+                    pen.setBrush(inColor);
+                    pen.setWidthF(1);
+                    p.setPen(pen);
+                    p.setBrush(c);
+                    p.drawEllipse(r2);
+                }
+
+                if (d_ptr->m_model->currentStop() == stop) {
+                    p.setBrush(Qt::NoBrush);
+                    pen.setWidthF(5);
+                    pen.setBrush(drawColor);
+                    int corr = 4;
+                    if (!d_ptr->m_model->isSelected(stop)) {
+                        corr = 3;
+                        pen.setWidthF(7);
+                    }
+                    p.setPen(pen);
+                    p.drawEllipse(rect.adjusted(corr, corr, -corr, -corr));
+                }
+
+            }
+            p.restore();
+        }
+    }
+    if (d_ptr->m_backgroundCheckered) {
+        p.end();
+        p.begin(viewport());
+        p.drawPixmap(0, 0, pix);
+    }
+    p.end();
+}
+
+void QtGradientStopsWidget::focusInEvent(QFocusEvent *e)
+{
+    Q_UNUSED(e)
+    viewport()->update();
+}
+
+void QtGradientStopsWidget::focusOutEvent(QFocusEvent *e)
+{
+    Q_UNUSED(e)
+    viewport()->update();
+}
+
+void QtGradientStopsWidget::contextMenuEvent(QContextMenuEvent *e)
+{
+    if (!d_ptr->m_model)
+        return;
+
+    d_ptr->m_clickPos = e->pos();
+
+    QMenu menu(this);
+    QAction *newStopAction = new QAction(tr("New Stop"), &menu);
+    QAction *deleteAction = new QAction(tr("Delete"), &menu);
+    QAction *flipAllAction = new QAction(tr("Flip All"), &menu);
+    QAction *selectAllAction = new QAction(tr("Select All"), &menu);
+    QAction *zoomInAction = new QAction(tr("Zoom In"), &menu);
+    QAction *zoomOutAction = new QAction(tr("Zoom Out"), &menu);
+    QAction *zoomAllAction = new QAction(tr("Reset Zoom"), &menu);
+    if (d_ptr->m_model->selectedStops().isEmpty() && !d_ptr->m_model->currentStop())
+        deleteAction->setEnabled(false);
+    if (zoom() <= 1) {
+        zoomOutAction->setEnabled(false);
+        zoomAllAction->setEnabled(false);
+    } else if (zoom() >= 100) {
+        zoomInAction->setEnabled(false);
+    }
+    connect(newStopAction, SIGNAL(triggered()), this, SLOT(slotNewStop()));
+    connect(deleteAction, SIGNAL(triggered()), this, SLOT(slotDelete()));
+    connect(flipAllAction, SIGNAL(triggered()), this, SLOT(slotFlipAll()));
+    connect(selectAllAction, SIGNAL(triggered()), this, SLOT(slotSelectAll()));
+    connect(zoomInAction, SIGNAL(triggered()), this, SLOT(slotZoomIn()));
+    connect(zoomOutAction, SIGNAL(triggered()), this, SLOT(slotZoomOut()));
+    connect(zoomAllAction, SIGNAL(triggered()), this, SLOT(slotResetZoom()));
+    menu.addAction(newStopAction);
+    menu.addAction(deleteAction);
+    menu.addAction(flipAllAction);
+    menu.addAction(selectAllAction);
+    menu.addSeparator();
+    menu.addAction(zoomInAction);
+    menu.addAction(zoomOutAction);
+    menu.addAction(zoomAllAction);
+    menu.exec(e->globalPos());
+}
+
+void QtGradientStopsWidget::wheelEvent(QWheelEvent *e)
+{
+    int numDegrees = e->delta() / 8;
+    int numSteps = numDegrees / 15;
+
+    int shift = numSteps;
+    if (shift < 0)
+        shift = -shift;
+    int pow = 1 << shift;
+    //const double c = 0.7071067; // 2 steps per doubled value
+    const double c = 0.5946036; // 4 steps pre doubled value
+    // in general c = pow(2, 1 / n) / 2; where n is the step
+    double factor = pow * c;
+
+    double newZoom = zoom();
+    if (numSteps < 0)
+        newZoom /= factor;
+    else
+        newZoom *= factor;
+    if (newZoom > 100)
+        newZoom = 100;
+    if (newZoom < 1)
+        newZoom = 1;
+
+    if (newZoom == zoom())
+        return;
+
+    setZoom(newZoom);
+    emit zoomChanged(zoom());
+}
+
+#ifndef QT_NO_DRAGANDDROP
+void QtGradientStopsWidget::dragEnterEvent(QDragEnterEvent *event)
+{
+    const QMimeData *mime = event->mimeData();
+    if (!mime->hasColor())
+        return;
+    event->accept();
+    d_ptr->m_dragModel = d_ptr->m_model->clone();
+
+    d_ptr->m_dragColor = qvariant_cast<QColor>(mime->colorData());
+    update();
+}
+
+void QtGradientStopsWidget::dragMoveEvent(QDragMoveEvent *event)
+{
+    QRectF rect = viewport()->rect();
+    rect.adjust(0, d_ptr->m_handleSize, 0, 0);
+    double x = d_ptr->fromViewport(event->pos().x());
+    QtGradientStop *dragStop = d_ptr->stopAt(event->pos());
+    if (dragStop) {
+        event->accept();
+        d_ptr->removeClonedStop();
+        d_ptr->changeStop(dragStop->position());
+    } else if (rect.contains(event->pos())) {
+        event->accept();
+        if (d_ptr->m_model->at(x)) {
+            d_ptr->removeClonedStop();
+            d_ptr->changeStop(x);
+        } else {
+            d_ptr->restoreChangedStop();
+            d_ptr->cloneStop(x);
+        }
+    } else {
+        event->ignore();
+        d_ptr->removeClonedStop();
+        d_ptr->restoreChangedStop();
+    }
+
+    update();
+}
+
+void QtGradientStopsWidget::dragLeaveEvent(QDragLeaveEvent *event)
+{
+    event->accept();
+    d_ptr->clearDrag();
+    update();
+}
+
+void QtGradientStopsWidget::dropEvent(QDropEvent *event)
+{
+    event->accept();
+    if (!d_ptr->m_dragModel)
+        return;
+
+    if (d_ptr->m_changedStop)
+        d_ptr->m_model->changeStop(d_ptr->m_model->at(d_ptr->m_changedStop->position()), d_ptr->m_dragColor);
+    else if (d_ptr->m_clonedStop)
+        d_ptr->m_model->addStop(d_ptr->m_clonedStop->position(), d_ptr->m_dragColor);
+
+    d_ptr->clearDrag();
+    update();
+}
+
+void QtGradientStopsWidgetPrivate::clearDrag()
+{
+    removeClonedStop();
+    restoreChangedStop();
+    delete m_dragModel;
+    m_dragModel = 0;
+}
+
+void QtGradientStopsWidgetPrivate::removeClonedStop()
+{
+    if (!m_clonedStop)
+        return;
+    m_dragModel->removeStop(m_clonedStop);
+    m_clonedStop = 0;
+}
+
+void QtGradientStopsWidgetPrivate::restoreChangedStop()
+{
+    if (!m_changedStop)
+        return;
+    m_dragModel->changeStop(m_changedStop, m_model->at(m_changedStop->position())->color());
+    m_changedStop = 0;
+    m_dragStop = 0;
+}
+
+void QtGradientStopsWidgetPrivate::changeStop(qreal pos)
+{
+    QtGradientStop *stop = m_dragModel->at(pos);
+    if (!stop)
+        return;
+
+    m_dragModel->changeStop(stop, m_dragColor);
+    m_changedStop = stop;
+    m_dragStop = m_model->at(stop->position());
+}
+
+void QtGradientStopsWidgetPrivate::cloneStop(qreal pos)
+{
+    if (m_clonedStop) {
+        m_dragModel->moveStop(m_clonedStop, pos);
+        return;
+    }
+    QtGradientStop *stop = m_dragModel->at(pos);
+    if (stop)
+        return;
+
+    m_clonedStop = m_dragModel->addStop(pos, m_dragColor);
+}
+
+#endif
+
+void QtGradientStopsWidget::setZoom(double zoom)
+{
+    double z = zoom;
+    if (z < 1)
+        z = 1;
+    else if (z > 100)
+        z = 100;
+
+    if (d_ptr->m_zoom == z)
+        return;
+
+    d_ptr->m_zoom = z;
+    int oldMax = horizontalScrollBar()->maximum();
+    int oldVal = horizontalScrollBar()->value();
+    horizontalScrollBar()->setRange(0, qRound(d_ptr->m_scaleFactor * (d_ptr->m_zoom - 1)));
+    int newMax = horizontalScrollBar()->maximum();
+    double newVal = (oldVal + (double)d_ptr->m_scaleFactor / 2) * (newMax + d_ptr->m_scaleFactor)
+                / (oldMax + d_ptr->m_scaleFactor) - (double)d_ptr->m_scaleFactor / 2;
+    horizontalScrollBar()->setValue(qRound(newVal));
+    viewport()->update();
+}
+
+double QtGradientStopsWidget::zoom() const
+{
+    return d_ptr->m_zoom;
+}
+
+QT_END_NAMESPACE
+
+#include "moc_qtgradientstopswidget.cpp"