HG_REPOSITORIES/LPP/INSTRUMENTATION/USERS/JEANDET/qtcharts Commit - r1455:ed7ab8a85450

Fixed decoration of QLegend

Tero Ahola -

r1455:ed7ab8a85450

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r1455:ed7ab8a85450

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src/charttheme.cpp +3 -5

             /****************************************************************************
             **
             ** Copyright (C) 2012 Digia Plc
             ** All rights reserved.
             ** For any questions to Digia, please use contact form at http://qt.digia.com
             **
             ** This file is part of the Qt Commercial Charts Add-on.
             **
             ** $QT_BEGIN_LICENSE$
             ** Licensees holding valid Qt Commercial licenses may use this file in
             ** accordance with the Qt Commercial License Agreement provided with the
             ** Software or, alternatively, in accordance with the terms contained in
             ** a written agreement between you and Digia.
             **
             ** If you have questions regarding the use of this file, please use
             ** contact form at http://qt.digia.com
             ** $QT_END_LICENSE$
             **
             ****************************************************************************/
             #include "charttheme_p.h"
             #include "qchart.h"
             #include "qchart_p.h"
             #include "qchartview.h"
             #include "qlegend.h"
             #include "qaxis.h"
             #include <QTime>
             //series
             #include "qbarset.h"
             #include "qbarseries.h"
             #include "qstackedbarseries.h"
             #include "qpercentbarseries.h"
             #include "qlineseries.h"
             #include "qareaseries.h"
             #include "qscatterseries.h"
             #include "qpieseries.h"
             #include "qpieslice.h"
             #include "qpieslice_p.h"
             #include "qsplineseries.h"
             //items
             #include "chartaxis_p.h"
             #include "barchartitem_p.h"
             #include "stackedbarchartitem_p.h"
             #include "percentbarchartitem_p.h"
             #include "linechartitem_p.h"
             #include "areachartitem_p.h"
             #include "scatterchartitem_p.h"
             #include "piechartitem_p.h"
             #include "splinechartitem_p.h"
             //themes
             #include "chartthemesystem_p.h"
             #include "chartthemelight_p.h"
             #include "chartthemebluecerulean_p.h"
             #include "chartthemedark_p.h"
             #include "chartthemebrownsand_p.h"
             #include "chartthemebluencs_p.h"
             #include "chartthemehighcontrast_p.h"
             #include "chartthemeblueicy_p.h"
             QTCOMMERCIALCHART_BEGIN_NAMESPACE
             ChartTheme::ChartTheme(QChart::ChartTheme id) :
                 m_masterFont(QFont("arial", 14)),
                 m_labelFont(QFont("arial", 10)),
                 m_titleBrush(QColor(QRgb(0x000000))),
                 m_axisLinePen(QPen(QRgb(0x000000))),
                 m_axisLabelBrush(QColor(QRgb(0x000000))),
                 m_backgroundShadesPen(Qt::NoPen),
                 m_backgroundShadesBrush(Qt::NoBrush),
                 m_backgroundShades(BackgroundShadesNone),
                 m_backgroundDropShadowEnabled(false),
                 m_gridLinePen(QPen(QRgb(0x000000))),
                 m_force(false)
             {
                 m_id = id;
                 qsrand(QTime(0,0,0).secsTo(QTime::currentTime()));
             }
             ChartTheme* ChartTheme::createTheme(QChart::ChartTheme theme)
             {
                 switch(theme) {
                     case QChart::ChartThemeLight:
                         return new ChartThemeLight();
                     case QChart::ChartThemeBlueCerulean:
                         return new ChartThemeBlueCerulean();
                     case QChart::ChartThemeDark:
                         return new ChartThemeDark();
                     case QChart::ChartThemeBrownSand:
                         return new ChartThemeBrownSand();
                     case QChart::ChartThemeBlueNcs:
                         return new ChartThemeBlueNcs();
                     case QChart::ChartThemeHighContrast:
                         return new ChartThemeHighContrast();
                     case QChart::ChartThemeBlueIcy:
                         return new ChartThemeBlueIcy();
                     default:
                         return new ChartThemeSystem();
                 }
             }
             void ChartTheme::decorate(QChart *chart)
             {
                 QBrush brush;
                 if(brush == chart->backgroundBrush() ||  m_force)
                     chart->setBackgroundBrush(m_chartBackgroundGradient);
                 chart->setTitleFont(m_masterFont);
                 chart->setTitleBrush(m_titleBrush);
                 chart->setBackgroundDropShadowEnabled(m_backgroundDropShadowEnabled);
             }
             void ChartTheme::decorate(QLegend *legend)
             {
                 QPen pen;
                 QBrush brush;
-                if (pen == legend->pen() ||  m_force){
+                if (pen == legend->pen() || m_force)
-                    legend->setPen(Qt::NoPen);
+                    legend->setPen(m_axisLinePen);
-                if (brush == legend->brush() ||  m_force) {
+                if (brush == legend->brush() || m_force)
                     legend->setBrush(m_chartBackgroundGradient);
             }
             void ChartTheme::decorate(QAreaSeries *series, int index)
             {
                 QPen pen;
                 QBrush brush;
                 if (pen == series->pen() ||  m_force){
                     pen.setColor(colorAt(m_seriesGradients.at(index % m_seriesGradients.size()), 0.0));
                     pen.setWidthF(2);
                     series->setPen(pen);
                 }
                 if (brush == series->brush() ||  m_force) {
                    QBrush brush(m_seriesColors.at(index % m_seriesColors.size()));
                    series->setBrush(brush);
                 }
             }
             void ChartTheme::decorate(QLineSeries *series,int index)
             {
                 QPen pen;
                 if(pen == series->pen() ||  m_force ){
                     pen.setColor(m_seriesColors.at(index%m_seriesColors.size()));
                     pen.setWidthF(2);
                     series->setPen(pen);
                 }
             }
             void ChartTheme::decorate(QBarSeries *series, int index)
             {
                 QBrush brush;
                 QPen pen;
                 QList<QBarSet *> sets = series->barSets();
                 qreal takeAtPos = 0.5;
                 qreal step = 0.2;
                 if (sets.count() > 1 ) {
                     step = 1.0 / (qreal) sets.count();
                     if (sets.count() % m_seriesGradients.count())
                         step *= m_seriesGradients.count();
                     else
                         step *= (m_seriesGradients.count() - 1);
                 }
                 for (int i(0); i < sets.count(); i++) {
                     int colorIndex = (index + i) % m_seriesGradients.count();
                     if (i > 0 && i % m_seriesGradients.count() == 0) {
                         // There is no dedicated base color for each sets, generate more colors
                         takeAtPos += step;
                         if (takeAtPos == 1.0)
                             takeAtPos += step;
                         takeAtPos -= (int) takeAtPos;
                     }
                     if (brush == sets.at(i)->brush() ||  m_force )
                         sets.at(i)->setBrush(colorAt(m_seriesGradients.at(colorIndex), takeAtPos));
                     // Pick label color from the opposite end of the gradient.
                     // 0.3 as a boundary seems to work well.
                     if (takeAtPos < 0.3)
                         sets.at(i)->setLabelBrush(colorAt(m_seriesGradients.at(index % m_seriesGradients.size()), 1));
                     else
                         sets.at(i)->setLabelBrush(colorAt(m_seriesGradients.at(index % m_seriesGradients.size()), 0));
                     if (pen == sets.at(i)->pen() ||  m_force) {
                         QColor c = colorAt(m_seriesGradients.at(index % m_seriesGradients.size()), 0.0);
                         sets.at(i)->setPen(c);
                     }
                 }
             }
             void ChartTheme::decorate(QScatterSeries *series, int index)
             {
                 QPen pen;
                 QBrush brush;
                 if (pen == series->pen() ||  m_force) {
                     pen.setColor(colorAt(m_seriesGradients.at(index % m_seriesGradients.size()), 0.0));
                     pen.setWidthF(2);
                     series->setPen(pen);
                 }
                 if (brush == series->brush() ||  m_force) {
                     QBrush brush(m_seriesColors.at(index % m_seriesColors.size()));
                     series->setBrush(brush);
                 }
             }
             void ChartTheme::decorate(QPieSeries *series, int index)
             {
                 for (int i(0); i < series->slices().count(); i++) {
                     QColor penColor = colorAt(m_seriesGradients.at(index % m_seriesGradients.size()), 0.0);
                     // Get color for a slice from a gradient linearly, beginning from the start of the gradient
                     qreal pos = (qreal) (i + 1) / (qreal) series->count();
                     QColor brushColor = colorAt(m_seriesGradients.at(index % m_seriesGradients.size()), pos);
                     QPieSlice *s = series->slices().at(i);
                     QPieSlicePrivate *d = QPieSlicePrivate::fromSlice(s);
                     if (d->m_data.m_slicePen.isThemed() || m_force)
                         d->setPen(penColor, true);
                     if (d->m_data.m_sliceBrush.isThemed() || m_force)
                         d->setBrush(brushColor, true);
                     if (d->m_data.m_labelBrush.isThemed() || m_force)
                         d->setLabelBrush(QBrush(m_titleBrush.color()), true);
                     if (d->m_data.m_labelFont.isThemed() || m_force)
                         d->setLabelFont(m_labelFont, true);
                 }
             }
             void ChartTheme::decorate(QSplineSeries *series, int index)
             {
                 QPen pen;
                 if(pen == series->pen() ||  m_force){
                     pen.setColor(m_seriesColors.at(index%m_seriesColors.size()));
                     pen.setWidthF(2);
                     series->setPen(pen);
                 }
             }
             void ChartTheme::decorate(QAxis *axis,bool axisX)
             {
                 QPen pen;
                 QBrush brush;
                 QFont font;
                 if (axis->isAxisVisible()) {
                     if(brush == axis->labelsBrush() ||  m_force){
                         axis->setLabelsBrush(m_axisLabelBrush);
                     }
                     if(pen == axis->labelsPen() ||  m_force){
                         axis->setLabelsPen(Qt::NoPen); // NoPen for performance reasons
                     }
                    if (axis->shadesVisible() ||  m_force) {
                      if(brush == axis->shadesBrush() ||  m_force){
                          axis->setShadesBrush(m_backgroundShadesBrush);
                      }
                      if(pen == axis->shadesPen() ||  m_force){
                          axis->setShadesPen(m_backgroundShadesPen);
                      }
                      if( m_force && (m_backgroundShades == BackgroundShadesBoth
                                      || (m_backgroundShades == BackgroundShadesVertical && axisX)
                                      || (m_backgroundShades == BackgroundShadesHorizontal && !axisX))){
                          axis->setShadesVisible(true);
                      }
                    }
                     if(pen == axis->axisPen() ||  m_force){
                         axis->setAxisPen(m_axisLinePen);
                     }
                     if(pen == axis->gridLinePen() ||  m_force){
                         axis->setGridLinePen(m_gridLinePen);
                     }
                     if(font == axis->labelsFont() || m_force){
                         axis->setLabelsFont(m_labelFont);
                     }
                 }
             }
             void ChartTheme::generateSeriesGradients()
             {
                 // Generate gradients in HSV color space
                 foreach (const QColor& color, m_seriesColors) {
                     QLinearGradient g;
                     qreal h = color.hsvHueF();
                     qreal s = color.hsvSaturationF();
                     // TODO: tune the algorithm to give nice results with most base colors defined in
                     // most themes. The rest of the gradients we can define manually in theme specific
                     // implementation.
                     QColor start = color;
                     start.setHsvF(h, 0.0, 1.0);
                     g.setColorAt(0.0, start);
                     g.setColorAt(0.5, color);
                     QColor end = color;
                     end.setHsvF(h, s, 0.25);
                     g.setColorAt(1.0, end);
                     m_seriesGradients << g;
                 }
             }
             QColor ChartTheme::colorAt(const QColor &start, const QColor &end, qreal pos)
             {
                 Q_ASSERT(pos >= 0.0 && pos <= 1.0);
                 qreal r = start.redF() + ((end.redF() - start.redF()) * pos);
                 qreal g = start.greenF() + ((end.greenF() - start.greenF()) * pos);
                 qreal b = start.blueF() + ((end.blueF() - start.blueF()) * pos);
                 QColor c;
                 c.setRgbF(r, g, b);
                 return c;
             }
             QColor ChartTheme::colorAt(const QGradient &gradient, qreal pos)
             {
                 Q_ASSERT(pos >= 0 && pos <= 1.0);
                 QGradientStops stops = gradient.stops();
                 int count = stops.count();
                 // find previous stop relative to position
                 QGradientStop prev = stops.first();
                 for (int i = 0; i < count; i++) {
                     QGradientStop stop = stops.at(i);
                     if (pos > stop.first)
                         prev = stop;
                     // given position is actually a stop position?
                     if (pos == stop.first) {
                         //qDebug() << "stop color" << pos;
                         return stop.second;
                     }
                 }
                 // find next stop relative to position
                 QGradientStop next = stops.last();
                 for (int i = count - 1; i >= 0; i--) {
                     QGradientStop stop = stops.at(i);
                     if (pos < stop.first)
                         next = stop;
                 }
                 //qDebug() << "prev" << prev.first << "pos" << pos << "next" << next.first;
                 qreal range = next.first - prev.first;
                 qreal posDelta = pos - prev.first;
                 qreal relativePos = posDelta / range;
                 //qDebug() << "range" << range << "posDelta" << posDelta << "relativePos" << relativePos;
                 return colorAt(prev.second, next.second, relativePos);
             }
             void ChartTheme::setForced(bool enabled)
             {
                 m_force=enabled;
             }
             QTCOMMERCIALCHART_END_NAMESPACE

src/legend/qlegend.cpp +2 -2

             /****************************************************************************
              **
              ** Copyright (C) 2012 Digia Plc
              ** All rights reserved.
              ** For any questions to Digia, please use contact form at http://qt.digia.com
              **
              ** This file is part of the Qt Commercial Charts Add-on.
              **
              ** $QT_BEGIN_LICENSE$
              ** Licensees holding valid Qt Commercial licenses may use this file in
              ** accordance with the Qt Commercial License Agreement provided with the
              ** Software or, alternatively, in accordance with the terms contained in
              ** a written agreement between you and Digia.
              **
              ** If you have questions regarding the use of this file, please use
              ** contact form at http://qt.digia.com
              ** $QT_END_LICENSE$
              **
              ****************************************************************************/
             #include "qlegend.h"
             #include "qlegend_p.h"
             #include "qabstractseries.h"
             #include "qabstractseries_p.h"
             #include "qchart_p.h"
             #include "legendmarker_p.h"
             #include "qxyseries.h"
             #include "qlineseries.h"
             #include "qareaseries.h"
             #include "qscatterseries.h"
             #include "qsplineseries.h"
             #include "qbarseries.h"
             #include "qstackedbarseries.h"
             #include "qpercentbarseries.h"
             #include "qbarset.h"
             #include "qpieseries.h"
             #include "qpieseries_p.h"
             #include "qpieslice.h"
             #include "chartpresenter_p.h"
             #include <QPainter>
             #include <QPen>
             #include <QTimer>
             #include <QGraphicsSceneEvent>
             QTCOMMERCIALCHART_BEGIN_NAMESPACE
             /*!
                 \class QLegend
                 \brief part of QtCommercial chart API.
                 \mainclass
                 QLegend is a graphical object, whics displays legend of the chart. Legend state is updated by QChart, when
                 series have been changed. By default, legend is drawn by QChart, but user can set a new parent to legend and
                 handle the drawing manually.
                 User isn't supposed to create or delete legend objects, but can reference it via QChart class.
                 \image examples_percentbarchart_legend.png
                 \sa QChart
             */
             /*!
                 \qmlclass Legend QLegend
                 \brief Legend is part of QtCommercial Chart QML API.
                 Legend is a graphical object, whics displays legend of the chart. Legend state is updated by ChartView, when
                 series have been changed. Legend is referenced via ChartView class. For example:
                 \code
                     ChartView {
                         legend.visible: true
                         legend.alignment: Qt.AlignBottom
                         // Add a few series...
                     }
                 \endcode
                 \image examples_percentbarchart_legend.png
             */
             /*!
                 \property QLegend::alignment
                 \brief The alignment of the legend.
                 Legend paints on the defined position in the chart. The following alignments are supported:
                 Qt::AlignTop, Qt::AlignBottom, Qt::AlignLeft, Qt::AlignRight. If you set more than one flag the result is undefined.
             */
             /*!
                 \qmlproperty Qt.Alignment Legend::alignment
                 \brief The alignment of the legend.
                 Legend paints on the defined position in the chart. The following alignments are supported:
                 Qt.AlignTop, Qt.AlignBottom, Qt.AlignLeft, Qt.AlignRight. If you set more than one flag the result is undefined.
             */
             /*!
                 \property QLegend::backgroundVisible
                 Whether the legend background is visible or not.
             */
             /*!
                 \qmlproperty bool Legend::backgroundVisible
                 Whether the legend background is visible or not.
             */
             /*!
                 \property QLegend::color
                 The color of the legend, i.e. the background color.
             */
             /*!
                 \qmlproperty color Legend::color
                 The color of the legend, i.e. the background color.
             */
             /*!
                 \property QLegend::borderColor
                 The border color of the legend, i.e. the line color.
             */
             /*!
                 \qmlproperty color Legend::borderColor
                 The border color of the legend, i.e. the line color.
             */
             /*!
                 \fn void QLegend::alignmentChanged(Qt::Alignment)
                 Emitted when the \a alignment of the legend changes.
             */
             /*!
                 \fn void QLegend::backgroundVisibleChanged(bool)
                 The visibility of the legend background changed to \a visible.
             */
             /*!
                 \fn void QLegend::colorChanged(QColor)
                 The color of the legend background changed to \a color.
             */
             /*!
                 \fn void QLegend::borderColorChanged(QColor)
                 The border color of the legend background changed to \a color.
             */
             /*!
              \fn qreal QLegend::minWidth() const
              Returns minimum width of the legend
              */
             /*!
              \fn qreal QLegend::minHeight() const
              Returns minimum height of the legend
              */
             /*!
              Constructs the legend object and sets the parent to \a parent
              */
             QLegend::QLegend(QChart *chart):QGraphicsWidget(chart),
             d_ptr(new QLegendPrivate(chart->d_ptr->m_presenter,chart,this))
             {
                 setZValue(ChartPresenter::LegendZValue);
                 setFlags(QGraphicsItem::ItemClipsChildrenToShape);
                 QObject::connect(chart->d_ptr->m_dataset,SIGNAL(seriesAdded(QAbstractSeries*,Domain*)),d_ptr.data(),SLOT(handleSeriesAdded(QAbstractSeries*,Domain*)));
                 QObject::connect(chart->d_ptr->m_dataset,SIGNAL(seriesRemoved(QAbstractSeries*)),d_ptr.data(),SLOT(handleSeriesRemoved(QAbstractSeries*)));
                 QObject::connect(chart->d_ptr->m_dataset,SIGNAL(seriesUpdated(QAbstractSeries*)),d_ptr.data(),SLOT(handleSeriesUpdated(QAbstractSeries*)));
             }
             /*!
                 Destroys the legend object. Legend is always owned by a QChart, so an application should never call this.
             */
             QLegend::~QLegend()
             {
             }
             /*!
              Paints the legend to given \a painter. Paremeters \a option and \a widget arent used.
              */
             void QLegend::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
             {
                 Q_UNUSED(option)
                 Q_UNUSED(widget)
                 if(!d_ptr->m_backgroundVisible) return;
                 painter->setOpacity(opacity());
                 painter->setPen(d_ptr->m_pen);
                 painter->setBrush(d_ptr->m_brush);
                 painter->drawRoundRect(rect(),d_ptr->roundness(rect().width()),d_ptr->roundness(rect().height()));
             }
             /*!
              Bounding rect of legend.
              */
             QRectF QLegend::boundingRect() const
             {
                 return d_ptr->m_rect;
             }
             /*!
              Sets the \a brush of legend. Brush affects the background of legend.
              */
             void QLegend::setBrush(const QBrush &brush)
             {
                 if (d_ptr->m_brush != brush) {
                     d_ptr->m_brush = brush;
                     update();
                 }
             }
             /*!
              Returns the brush used by legend.
              */
             QBrush QLegend::brush() const
             {
                 return d_ptr->m_brush;
             }
             void QLegend::setColor(QColor color)
             {
                 QBrush b = d_ptr->m_brush;
                 if (b.color() != color) {
                     b.setColor(color);
                     setBrush(b);
                     emit colorChanged(color);
                 }
             }
             QColor QLegend::color()
             {
                 return d_ptr->m_brush.color();
             }
             /*!
              Sets the \a pen of legend. Pen affects the legend borders.
              */
             void QLegend::setPen(const QPen &pen)
             {
                 if (d_ptr->m_pen != pen) {
                     d_ptr->m_pen = pen;
                     update();
                 }
             }
             /*!
              Returns the pen used by legend
              */
             QPen QLegend::pen() const
             {
                 return d_ptr->m_pen;
             }
             void QLegend::setBorderColor(QColor color)
             {
                 QPen p = d_ptr->m_pen;
                 if (p.color() != color) {
                     p.setColor(color);
                     setPen(p);
                     emit borderColorChanged(color);
                 }
             }
             QColor QLegend::borderColor()
             {
                 return d_ptr->m_pen.color();
             }
             void QLegend::setAlignment(Qt::Alignment alignment)
             {
                 if(d_ptr->m_alignment!=alignment) {
                     d_ptr->m_alignment = alignment;
                     d_ptr->updateLayout();
                     alignmentChanged(alignment);
                 }
             }
             Qt::Alignment QLegend::alignment() const
             {
                 return d_ptr->m_alignment;
             }
             /*!
              Detaches the legend from chart. Chart won't change layout of the legend.
              */
             void QLegend::detachFromChart()
             {
                 d_ptr->m_attachedToChart = false;
             }
             /*!
              Attaches the legend to chart. Chart may change layout of the legend.
              */
             void QLegend::attachToChart()
             {
                 d_ptr->attachToChart();
             }
             /*!
              Returns true, if legend is attached to chart.
              */
             bool QLegend::isAttachedToChart()
             {
                 return d_ptr->m_attachedToChart;
             }
             /*!
                 Sets the legend's scrolling offset to value defined by \a point.
             */
             void QLegend::setOffset(const QPointF& point)
             {
                 d_ptr->setOffset(point.x(),point.y());
             }
             /*!
                 Returns the legend's scrolling offset.
             */
             QPointF QLegend::offset() const
             {
                 return QPointF(d_ptr->m_offsetX,d_ptr->m_offsetY);
             }
             /*!
              Sets the visibility of legend background to \a visible
              */
             void QLegend::setBackgroundVisible(bool visible)
             {
                 if(d_ptr->m_backgroundVisible != visible) {
                     d_ptr->m_backgroundVisible = visible;
                     update();
                     emit backgroundVisibleChanged(visible);
                 }
             }
             /*!
              Returns the visibility of legend background
              */
             bool QLegend::isBackgroundVisible() const
             {
                 return d_ptr->m_backgroundVisible;
             }
             /*!
              \internal \a event see QGraphicsWidget for details
              */
             void QLegend::resizeEvent(QGraphicsSceneResizeEvent *event)
             {
                 const QRectF& rect = QRectF(QPoint(0,0),event->newSize());
                 QGraphicsWidget::resizeEvent(event);
                 if(d_ptr->m_rect != rect) {
                     d_ptr->m_rect = rect;
                     d_ptr->updateLayout();
                 }
             }
             /*!
              \internal \a event see QGraphicsWidget for details
              */
             void QLegend::hideEvent(QHideEvent *event)
             {
                 QGraphicsWidget::hideEvent(event);
                 setEnabled(false);
                 d_ptr->updateLayout();
             }
             /*!
              \internal \a event see QGraphicsWidget for details
              */
             void QLegend::showEvent(QShowEvent *event)
             {
                 QGraphicsWidget::showEvent(event);
                 setEnabled(true);
                 d_ptr->updateLayout();
             }
             qreal QLegend::minWidth() const
             {
                 return d_ptr->m_minWidth;
             }
             qreal QLegend::minHeight() const
             {
                 return d_ptr->m_minHeight;
             }
             ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
             QLegendPrivate::QLegendPrivate(ChartPresenter* presenter, QChart *chart, QLegend *q):
                 q_ptr(q),
                 m_presenter(presenter),
                 m_chart(chart),
                 m_markers(new QGraphicsItemGroup(q)),
                 m_alignment(Qt::AlignTop),
-                m_brush(Qt::SolidPattern),
+                m_brush(QBrush()),
-                m_pen(Qt::SolidLine),
+                m_pen(QPen()),
                 m_offsetX(0),
                 m_offsetY(0),
                 m_minWidth(0),
                 m_minHeight(0),
                 m_width(0),
                 m_height(0),
                 m_diameter(5),
                 m_attachedToChart(true),
                 m_backgroundVisible(false)
             {
             }
             QLegendPrivate::~QLegendPrivate()
             {
             }
             void QLegendPrivate::setOffset(qreal x, qreal y)
             {
                 bool scrollHorizontal = true;
                 switch(m_alignment) {
                     case Qt::AlignTop:
                     case Qt::AlignBottom: {
                         scrollHorizontal = true;
                         break;
                     }
                     case Qt::AlignLeft:
                     case Qt::AlignRight: {
                         scrollHorizontal = false;
                         break;
                     }
                 }
                 // If detached, the scrolling direction is vertical instead of horizontal and vice versa.
                 if (!m_attachedToChart) {
                     scrollHorizontal = !scrollHorizontal;
                 }
                 // Limit offset between m_minOffset and m_maxOffset
                 if (scrollHorizontal) {
                     if(m_width<=m_rect.width()) return;
                     if (x != m_offsetX) {
                         m_offsetX = qBound(m_minOffsetX, x, m_maxOffsetX);
                         m_markers->setPos(-m_offsetX,m_rect.top());
                     }
                 } else {
                     if(m_height<=m_rect.height()) return;
                     if (y != m_offsetY) {
                         m_offsetY = qBound(m_minOffsetY, y, m_maxOffsetY);
                         m_markers->setPos(m_rect.left(),-m_offsetY);
                     }
                 }
             }
             void QLegendPrivate::updateLayout()
             {
                 if (!m_attachedToChart) {
                     updateDetachedLayout();
                     return;
                 }
                 m_offsetX=0;
                 QList<QGraphicsItem *> items = m_markers->childItems();
                 if(items.isEmpty()) return;
                 m_minWidth=0;
                 m_minHeight=0;
                 switch(m_alignment) {
                     case Qt::AlignTop:
                     case Qt::AlignBottom: {
                         QPointF point = m_rect.topLeft();
                         m_width = 0;
                         foreach (QGraphicsItem *item, items) {
                             item->setPos(point.x(),m_rect.height()/2 -item->boundingRect().height()/2);
                             const QRectF& rect = item->boundingRect();
                             qreal w = rect.width();
                             m_minWidth=qMax(m_minWidth,w);
                             m_minHeight=qMax(m_minHeight,rect.height());
                             m_width+=w;
                             point.setX(point.x() + w);
                         }
                         if(m_width<m_rect.width()) {
                             m_markers->setPos(m_rect.width()/2-m_width/2,m_rect.top());
                         }
                         else {
                             m_markers->setPos(m_rect.topLeft());
                         }
                         m_height=m_minHeight;
                     }
                     break;
                     case Qt::AlignLeft:
                     case Qt::AlignRight: {
                         QPointF point = m_rect.topLeft();
                         m_height = 0;
                         foreach (QGraphicsItem *item, items) {
                             item->setPos(point);
                             const QRectF& rect = item->boundingRect();
                             qreal h = rect.height();
                             m_minWidth=qMax(m_minWidth,rect.width());
                             m_minHeight=qMax(m_minHeight,h);
                             m_height+=h;
                             point.setY(point.y() + h);
                         }
                         if(m_height<m_rect.height()) {
                             m_markers->setPos(m_rect.left(),m_rect.height()/2-m_height/2);
                         }
                         else {
                             m_markers->setPos(m_rect.topLeft());
                         }
                         m_width=m_minWidth;
                     }
                     break;
                 }
                 m_minOffsetX = 0;
                 m_minOffsetY = 0;
                 m_maxOffsetX = m_width - m_rect.width();
                 m_maxOffsetY = m_height - m_rect.height();
                 m_presenter->updateLayout();
             }
             void QLegendPrivate::updateDetachedLayout()
             {
                 // Detached layout is different.
                 // In detached mode legend may have multiple rows and columns, so layout calculations
                 // differ a log from attached mode.
                 // Also the scrolling logic is bit different.
                 m_offsetX=0;
                 m_offsetY=0;
                 QList<QGraphicsItem *> items = m_markers->childItems();
                 if(items.isEmpty()) return;
                 m_minWidth = 0;
                 m_minHeight = 0;
                 switch (m_alignment) {
                     case Qt::AlignTop: {
                         QPointF point = m_rect.topLeft();
                         m_width = 0;
                         m_height = 0;
                         for (int i=0; i<items.count(); i++) {
                             QGraphicsItem *item = items.at(i);
                             const QRectF& rect = item->boundingRect();
                             qreal w = rect.width();
                             qreal h = rect.height();
                             m_minWidth = qMax(m_minWidth,w);
                             m_minHeight = qMax(m_minHeight,rect.height());
                             m_height = qMax(m_height,h);
                             item->setPos(point.x(),point.y());
                             point.setX(point.x() + w);
                             if (point.x() + w > m_rect.topLeft().x() + m_rect.width()) {
                                 // Next item would go off rect.
                                 point.setX(m_rect.topLeft().x());
                                 point.setY(point.y() + h);
                                 if (i+1 < items.count()) {
                                     m_height += h;
                                 }
                             }
                         }
                         m_markers->setPos(m_rect.topLeft());
                         m_width = m_minWidth;
                         m_minOffsetX = 0;
                         m_minOffsetY = 0;
                         m_maxOffsetX = m_width - m_rect.width();
                         m_maxOffsetY = m_height - m_rect.height();
                     }
                     break;
                     case Qt::AlignBottom: {
                         QPointF point = m_rect.bottomLeft();
                         m_width = 0;
                         m_height = 0;
                         for (int i=0; i<items.count(); i++) {
                             QGraphicsItem *item = items.at(i);
                             const QRectF& rect = item->boundingRect();
                             qreal w = rect.width();
                             qreal h = rect.height();
                             m_minWidth = qMax(m_minWidth,w);
                             m_minHeight = qMax(m_minHeight,rect.height());
                             m_height = qMax(m_height,h);
                             item->setPos(point.x(),point.y() - h);
                             point.setX(point.x() + w);
                             if (point.x() + w > m_rect.bottomLeft().x() + m_rect.width()) {
                                 // Next item would go off rect.
                                 point.setX(m_rect.bottomLeft().x());
                                 point.setY(point.y() - h);
                                 if (i+1 < items.count()) {
                                     m_height += h;
                                 }
                             }
                         }
                         m_markers->setPos(m_rect.topLeft());
                         m_width = m_minWidth;
                         m_minOffsetX = 0;
                         m_minOffsetY = qMin(m_rect.topLeft().y(), m_rect.topLeft().y() - m_height + m_rect.height());
                         m_maxOffsetX = m_width - m_rect.width();
                         m_maxOffsetY = 0;
                     }
                     break;
                     case Qt::AlignLeft: {
                         QPointF point = m_rect.topLeft();
                         m_width = 0;
                         m_height = 0;
                         qreal maxWidth = 0;
                         for (int i=0; i<items.count(); i++) {
                             QGraphicsItem *item = items.at(i);
                             const QRectF& rect = item->boundingRect();
                             qreal w = rect.width();
                             qreal h = rect.height();
                             m_minWidth = qMax(m_minWidth,rect.width());
                             m_minHeight = qMax(m_minHeight,h);
                             maxWidth = qMax(maxWidth,w);
                             item->setPos(point.x(),point.y());
                             point.setY(point.y() + h);
                             if (point.y() + h > m_rect.topLeft().y() + m_rect.height()) {
                                 // Next item would go off rect.
                                 point.setX(point.x() + maxWidth);
                                 point.setY(m_rect.topLeft().y());
                                 if (i+1 < items.count()) {
                                     m_width += maxWidth;
                                     maxWidth = 0;
                                 }
                             }
                         }
                         m_width += maxWidth;
                         m_markers->setPos(m_rect.topLeft());
                         m_height = m_minHeight;
                         m_minOffsetX = 0;
                         m_minOffsetY = 0;
                         m_maxOffsetX = m_width - m_rect.width();
                         m_maxOffsetY = m_height - m_rect.height();
                     }
                     break;
                     case Qt::AlignRight: {
                         QPointF point = m_rect.topRight();
                         m_width = 0;
                         m_height = 0;
                         qreal maxWidth = 0;
                         for (int i=0; i<items.count(); i++) {
                             QGraphicsItem *item = items.at(i);
                             const QRectF& rect = item->boundingRect();
                             qreal w = rect.width();
                             qreal h = rect.height();
                             m_minWidth = qMax(m_minWidth,rect.width());
                             m_minHeight = qMax(m_minHeight,h);
                             maxWidth = qMax(maxWidth,w);
                             item->setPos(point.x() - w,point.y());
                             point.setY(point.y() + h);
                             if (point.y() + h > m_rect.topLeft().y() + m_rect.height()) {
                                 // Next item would go off rect.
                                 point.setX(point.x() - maxWidth);
                                 point.setY(m_rect.topLeft().y());
                                 if (i+1 < items.count()) {
                                     m_width += maxWidth;
                                     maxWidth = 0;
                                 }
                             }
                         }
                         m_width += maxWidth;
                         m_markers->setPos(m_rect.topLeft());
                         m_height = m_minHeight;
                         m_minOffsetX = qMin(m_rect.topLeft().x(), m_rect.topLeft().x() - m_width + m_rect.width());
                         m_minOffsetY = 0;
                         m_maxOffsetX = 0;
                         m_maxOffsetY = m_height - m_rect.height();
                     }
                     break;
                     default:
                     break;
                 }
             }
             void QLegendPrivate::attachToChart()
             {
                 m_attachedToChart = true;
                 q_ptr->setParent(m_chart);
             }
             int QLegendPrivate::roundness(qreal size)
             {
                 return 100*m_diameter/int(size);
             }
             void QLegendPrivate::handleSeriesAdded(QAbstractSeries *series, Domain *domain)
             {
                 Q_UNUSED(domain)
                 QList<LegendMarker*> markers = series->d_ptr->createLegendMarker(q_ptr);
                 foreach(LegendMarker* marker, markers)
                     m_markers->addToGroup(marker);
                 if(series->type() == QAbstractSeries::SeriesTypePie) {
                     QPieSeries *pieSeries = static_cast<QPieSeries *>(series);
                     QObject::connect(pieSeries, SIGNAL(added(QList<QPieSlice*>)), this, SLOT(handleUpdatePieSeries()));
                     QObject::connect(pieSeries, SIGNAL(removed(QList<QPieSlice*>)), this, SLOT(handleUpdatePieSeries()));
                 }
                 updateLayout();
             }
             void QLegendPrivate::handleSeriesRemoved(QAbstractSeries *series)
             {
                 QList<QGraphicsItem *> items = m_markers->childItems();
                 foreach (QGraphicsItem *markers, items) {
                     LegendMarker *marker = static_cast<LegendMarker*>(markers);
                     if (marker->series() == series) {
                         delete marker;
                     }
                 }
                 if(series->type() == QAbstractSeries::SeriesTypePie)
                 {
                     QPieSeries *pieSeries = static_cast<QPieSeries *>(series);
                     QObject::disconnect(pieSeries, SIGNAL(added(QList<QPieSlice*>)), this, SLOT(handleUpdatePieSeries()));
                     QObject::disconnect(pieSeries, SIGNAL(removed(QList<QPieSlice*>)), this, SLOT(handleUpdatePieSeries()));
                 }
                 updateLayout();
             }
             void QLegendPrivate::handleSeriesUpdated(QAbstractSeries *series)
             {
                 // TODO: find out which markers are are added or removed. Update them
                 // TODO: better implementation
                 handleSeriesRemoved(series);
                 Domain domain;
                 handleSeriesAdded(series, &domain);
             }
             void QLegendPrivate::handleUpdatePieSeries()
             {
                 //TODO: reimplement to be optimal
                 QPieSeries* series = qobject_cast<QPieSeries *> (sender());
                 Q_ASSERT(series);
                 handleSeriesRemoved(series);
                 handleSeriesAdded(series, 0);
             }
             #include "moc_qlegend.cpp"
             #include "moc_qlegend_p.cpp"
             QTCOMMERCIALCHART_END_NAMESPACE

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