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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 477 insertions, 0 deletions

diff --git a/src/shared/qtgradienteditor/qtgradientstopsmodel.cpp b/src/shared/qtgradienteditor/qtgradientstopsmodel.cpp
new file mode 100644
index 000000000..427e6eed3
--- /dev/null
+++ b/src/shared/qtgradienteditor/qtgradientstopsmodel.cpp
@@ -0,0 +1,477 @@
+/****************************************************************************
+**
+** 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 "qtgradientstopsmodel.h"
+#include <QtGui/QColor>
+
+QT_BEGIN_NAMESPACE
+
+class QtGradientStopPrivate
+{
+public:
+    qreal m_position;
+    QColor m_color;
+    QtGradientStopsModel *m_model;
+};
+
+qreal QtGradientStop::position() const
+{
+    return d_ptr->m_position;
+}
+
+QColor QtGradientStop::color() const
+{
+    return d_ptr->m_color;
+}
+
+QtGradientStopsModel *QtGradientStop::gradientModel() const
+{
+    return d_ptr->m_model;
+}
+
+void QtGradientStop::setColor(const QColor &color)
+{
+    d_ptr->m_color = color;
+}
+
+void QtGradientStop::setPosition(qreal position)
+{
+    d_ptr->m_position = position;
+}
+
+QtGradientStop::QtGradientStop(QtGradientStopsModel *model)
+    : d_ptr(new QtGradientStopPrivate())
+{
+    d_ptr->m_position = 0;
+    d_ptr->m_color = Qt::white;
+    d_ptr->m_model = model;
+}
+
+QtGradientStop::~QtGradientStop()
+{
+}
+
+class QtGradientStopsModelPrivate
+{
+    QtGradientStopsModel *q_ptr;
+    Q_DECLARE_PUBLIC(QtGradientStopsModel)
+public:
+    QMap<qreal, QtGradientStop *> m_posToStop;
+    QMap<QtGradientStop *, qreal> m_stopToPos;
+    QMap<QtGradientStop *, bool> m_selection;
+    QtGradientStop *m_current;
+};
+
+
+
+QtGradientStopsModel::QtGradientStopsModel(QObject *parent)
+    : QObject(parent), d_ptr(new QtGradientStopsModelPrivate)
+{
+    d_ptr->q_ptr = this;
+    d_ptr->m_current = 0;
+}
+
+QtGradientStopsModel::~QtGradientStopsModel()
+{
+    clear();
+}
+
+QtGradientStopsModel::PositionStopMap QtGradientStopsModel::stops() const
+{
+    return d_ptr->m_posToStop;
+}
+
+QtGradientStop *QtGradientStopsModel::at(qreal pos) const
+{
+    if (d_ptr->m_posToStop.contains(pos))
+        return d_ptr->m_posToStop[pos];
+    return 0;
+}
+
+QColor QtGradientStopsModel::color(qreal pos) const
+{
+    PositionStopMap gradStops = stops();
+    if (gradStops.isEmpty())
+        return QColor::fromRgbF(pos, pos, pos, 1.0);
+    if (gradStops.contains(pos))
+        return gradStops[pos]->color();
+
+    gradStops[pos] = 0;
+    PositionStopMap::ConstIterator itStop = gradStops.constFind(pos);
+    if (itStop == gradStops.constBegin()) {
+        ++itStop;
+        return itStop.value()->color();
+    }
+    if (itStop == --gradStops.constEnd()) {
+        --itStop;
+        return itStop.value()->color();
+    }
+    PositionStopMap::ConstIterator itPrev = itStop;
+    PositionStopMap::ConstIterator itNext = itStop;
+    --itPrev;
+    ++itNext;
+
+    double prevX = itPrev.key();
+    double nextX = itNext.key();
+
+    double coefX = (pos - prevX) / (nextX - prevX);
+    QColor prevCol = itPrev.value()->color();
+    QColor nextCol = itNext.value()->color();
+
+    QColor newColor;
+    newColor.setRgbF((nextCol.redF()   - prevCol.redF()  ) * coefX + prevCol.redF(),
+                     (nextCol.greenF() - prevCol.greenF()) * coefX + prevCol.greenF(),
+                     (nextCol.blueF()  - prevCol.blueF() ) * coefX + prevCol.blueF(),
+                     (nextCol.alphaF() - prevCol.alphaF()) * coefX + prevCol.alphaF());
+    return newColor;
+}
+
+QList<QtGradientStop *> QtGradientStopsModel::selectedStops() const
+{
+    return d_ptr->m_selection.keys();
+}
+
+QtGradientStop *QtGradientStopsModel::currentStop() const
+{
+    return d_ptr->m_current;
+}
+
+bool QtGradientStopsModel::isSelected(QtGradientStop *stop) const
+{
+    if (d_ptr->m_selection.contains(stop))
+        return true;
+    return false;
+}
+
+QtGradientStop *QtGradientStopsModel::addStop(qreal pos, const QColor &color)
+{
+    qreal newPos = pos;
+    if (pos < 0.0)
+        newPos = 0.0;
+    if (pos > 1.0)
+        newPos = 1.0;
+    if (d_ptr->m_posToStop.contains(newPos))
+        return 0;
+    QtGradientStop *stop = new QtGradientStop();
+    stop->setPosition(newPos);
+    stop->setColor(color);
+
+    d_ptr->m_posToStop[newPos] = stop;
+    d_ptr->m_stopToPos[stop] = newPos;
+
+    emit stopAdded(stop);
+
+    return stop;
+}
+
+void QtGradientStopsModel::removeStop(QtGradientStop *stop)
+{
+    if (!d_ptr->m_stopToPos.contains(stop))
+        return;
+    if (currentStop() == stop)
+        setCurrentStop(0);
+    selectStop(stop, false);
+
+    emit stopRemoved(stop);
+
+    qreal pos = d_ptr->m_stopToPos[stop];
+    d_ptr->m_stopToPos.remove(stop);
+    d_ptr->m_posToStop.remove(pos);
+    delete stop;
+}
+
+void QtGradientStopsModel::moveStop(QtGradientStop *stop, qreal newPos)
+{
+    if (!d_ptr->m_stopToPos.contains(stop))
+        return;
+    if (d_ptr->m_posToStop.contains(newPos))
+        return;
+
+    if (newPos > 1.0)
+        newPos = 1.0;
+    else if (newPos < 0.0)
+        newPos = 0.0;
+
+    emit stopMoved(stop, newPos);
+
+    const qreal oldPos = stop->position();
+    stop->setPosition(newPos);
+    d_ptr->m_stopToPos[stop] = newPos;
+    d_ptr->m_posToStop.remove(oldPos);
+    d_ptr->m_posToStop[newPos] = stop;
+}
+
+void QtGradientStopsModel::swapStops(QtGradientStop *stop1, QtGradientStop *stop2)
+{
+    if (stop1 == stop2)
+        return;
+    if (!d_ptr->m_stopToPos.contains(stop1))
+        return;
+    if (!d_ptr->m_stopToPos.contains(stop2))
+        return;
+
+    emit stopsSwapped(stop1, stop2);
+
+    const qreal pos1 = stop1->position();
+    const qreal pos2 = stop2->position();
+    stop1->setPosition(pos2);
+    stop2->setPosition(pos1);
+    d_ptr->m_stopToPos[stop1] = pos2;
+    d_ptr->m_stopToPos[stop2] = pos1;
+    d_ptr->m_posToStop[pos1] = stop2;
+    d_ptr->m_posToStop[pos2] = stop1;
+}
+
+void QtGradientStopsModel::changeStop(QtGradientStop *stop, const QColor &newColor)
+{
+    if (!d_ptr->m_stopToPos.contains(stop))
+        return;
+    if (stop->color() == newColor)
+        return;
+
+    emit stopChanged(stop, newColor);
+
+    stop->setColor(newColor);
+}
+
+void QtGradientStopsModel::selectStop(QtGradientStop *stop, bool select)
+{
+    if (!d_ptr->m_stopToPos.contains(stop))
+        return;
+    bool selected = d_ptr->m_selection.contains(stop);
+    if (select == selected)
+        return;
+
+    emit stopSelected(stop, select);
+
+    if (select)
+        d_ptr->m_selection[stop] = true;
+    else
+        d_ptr->m_selection.remove(stop);
+}
+
+void QtGradientStopsModel::setCurrentStop(QtGradientStop *stop)
+{
+    if (stop && !d_ptr->m_stopToPos.contains(stop))
+        return;
+    if (stop == currentStop())
+        return;
+
+    emit currentStopChanged(stop);
+
+    d_ptr->m_current = stop;
+}
+
+QtGradientStop *QtGradientStopsModel::firstSelected() const
+{
+    PositionStopMap stopList = stops();
+    PositionStopMap::ConstIterator itStop = stopList.constBegin();
+    while (itStop != stopList.constEnd()) {
+        QtGradientStop *stop = itStop.value();
+        if (isSelected(stop))
+            return stop;
+        ++itStop;
+    };
+    return 0;
+}
+
+QtGradientStop *QtGradientStopsModel::lastSelected() const
+{
+    PositionStopMap stopList = stops();
+    PositionStopMap::ConstIterator itStop = stopList.constEnd();
+    while (itStop != stopList.constBegin()) {
+        --itStop;
+
+        QtGradientStop *stop = itStop.value();
+        if (isSelected(stop))
+            return stop;
+    };
+    return 0;
+}
+
+QtGradientStopsModel *QtGradientStopsModel::clone() const
+{
+    QtGradientStopsModel *model = new QtGradientStopsModel();
+
+    QMap<qreal, QtGradientStop *> stopsToClone = stops();
+    QMapIterator<qreal, QtGradientStop *> it(stopsToClone);
+    while (it.hasNext()) {
+        it.next();
+        model->addStop(it.key(), it.value()->color());
+    }
+    // clone selection and current also
+    return model;
+}
+
+void QtGradientStopsModel::moveStops(double newPosition)
+{
+    QtGradientStop *current = currentStop();
+    if (!current)
+        return;
+
+    double newPos = newPosition;
+
+    if (newPos > 1)
+        newPos = 1;
+    else if (newPos < 0)
+        newPos = 0;
+
+    if (newPos == current->position())
+        return;
+
+    double offset = newPos - current->position();
+
+    QtGradientStop *first = firstSelected();
+    QtGradientStop *last = lastSelected();
+
+    if (first && last) { // multiselection
+        double maxOffset = 1.0 - last->position();
+        double minOffset = -first->position();
+
+        if (offset > maxOffset)
+            offset = maxOffset;
+        else if (offset < minOffset)
+            offset = minOffset;
+
+    }
+
+    if (offset == 0)
+        return;
+
+    bool forward = (offset > 0) ? false : true;
+
+    PositionStopMap stopList;
+
+    QList<QtGradientStop *> selected = selectedStops();
+    QListIterator<QtGradientStop *> it(selected);
+    while (it.hasNext()) {
+        QtGradientStop *stop = it.next();
+        stopList[stop->position()] = stop;
+    }
+    stopList[current->position()] = current;
+
+    PositionStopMap::ConstIterator itStop = forward ? stopList.constBegin() : stopList.constEnd();
+    while (itStop != (forward ? stopList.constEnd() : stopList.constBegin())) {
+        if (!forward)
+            --itStop;
+        QtGradientStop *stop = itStop.value();
+            double pos = stop->position() + offset;
+            if (pos > 1)
+                pos = 1;
+            if (pos < 0)
+                pos = 0;
+
+            if (current == stop)
+                pos = newPos;
+
+            QtGradientStop *oldStop = at(pos);
+            if (oldStop && !stopList.values().contains(oldStop))
+                removeStop(oldStop);
+            moveStop(stop, pos);
+
+        if (forward)
+            ++itStop;
+    }
+}
+
+void QtGradientStopsModel::clear()
+{
+    QList<QtGradientStop *> stopsList = stops().values();
+    QListIterator<QtGradientStop *> it(stopsList);
+    while (it.hasNext())
+        removeStop(it.next());
+}
+
+void QtGradientStopsModel::clearSelection()
+{
+    QList<QtGradientStop *> stopsList = selectedStops();
+    QListIterator<QtGradientStop *> it(stopsList);
+    while (it.hasNext())
+        selectStop(it.next(), false);
+}
+
+void QtGradientStopsModel::flipAll()
+{
+    QMap<qreal, QtGradientStop *> stopsMap = stops();
+    QMapIterator<qreal, QtGradientStop *> itStop(stopsMap);
+    itStop.toBack();
+
+    QMap<QtGradientStop *, bool> swappedList;
+
+    while (itStop.hasPrevious()) {
+        itStop.previous();
+
+        QtGradientStop *stop = itStop.value();
+        if (swappedList.contains(stop))
+            continue;
+        const double newPos = 1.0 - itStop.key();
+        if (stopsMap.contains(newPos)) {
+            QtGradientStop *swapped = stopsMap.value(newPos);
+            swappedList[swapped] = true;
+            swapStops(stop, swapped);
+        } else {
+            moveStop(stop, newPos);
+        }
+    }
+}
+
+void QtGradientStopsModel::selectAll()
+{
+    QList<QtGradientStop *> stopsList = stops().values();
+    QListIterator<QtGradientStop *> it(stopsList);
+    while (it.hasNext())
+        selectStop(it.next(), true);
+}
+
+void QtGradientStopsModel::deleteStops()
+{
+    QList<QtGradientStop *> selected = selectedStops();
+    QListIterator<QtGradientStop *> itSel(selected);
+    while (itSel.hasNext()) {
+        QtGradientStop *stop = itSel.next();
+        removeStop(stop);
+    }
+    QtGradientStop *current = currentStop();
+    if (current)
+        removeStop(current);
+}
+
+QT_END_NAMESPACE