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#include "qchartglobal.h"
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#include "qlegend.h"
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#include "qseries.h"
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#include "legendmarker_p.h"
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#include "legendscrollbutton_p.h"
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#include "qxyseries.h"
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#include "qlineseries.h"
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#include "qareaseries.h"
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#include "qscatterseries.h"
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#include "qsplineseries.h"
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#include "qbarseries.h"
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#include "qstackedbarseries.h"
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#include "qpercentbarseries.h"
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#include "qbarset.h"
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#include "qpieseries.h"
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#include "qpieslice.h"
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#include "chartpresenter_p.h"
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#include <QPainter>
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#include <QPen>
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#include <QGraphicsSceneEvent>
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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/*!
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\class QLegend
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\brief part of QtCommercial chart API.
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QLegend is a graphical object, whics displays legend of the chart. Legend state is updated by QChart, when
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series have been changed. By default, legend is drawn by QChart, but user can set a new parent to legend and
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handle the drawing manually.
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User isn't supposed to create or delete legend objects, but can reference it via QChart class.
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\mainclass
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\sa QChart, QSeries
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*/
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/*!
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\enum QLegend::PreferredLayout
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This enum describes the possible position for legend inside chart.
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\value PreferredLayoutTop
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\value PreferredLayoutBottom
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\value PreferredLayoutLeft
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\value PreferredLayoutRight
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*/
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/*!
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\fn void QLegend::clicked(QSeries* series, Qt::MouseButton button)
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\brief Notifies when series has been clicked on legend \a series \a button
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*/
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/*!
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\fn void QLegend::clicked(QBarSet* barset, Qt::MouseButton button)
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\brief Notifies when barset has been clicked on legend \a barset \a button
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*/
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/*!
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\fn void QLegend::clicked(QPieSlice* slice, Qt::MouseButton button)
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\brief Notifies when pie slice has been clicked on legend \a slice \a button
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*/
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/*!
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Constructs the legend object and sets the parent to \a parent
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*/
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QLegend::QLegend(QGraphicsItem *parent)
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: QGraphicsObject(parent)
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,mPos(0,0)
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,mSize(0,0)
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,mMinimumSize(50,20) // TODO: magic numbers
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,mMaximumSize(150,100)
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,m_brush(Qt::darkGray) // TODO: from theme?
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,mPreferredLayout(QLegend::PreferredLayoutTop)
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,mFirstMarker(0)
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,mMargin(5)
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{
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// setVisible(false);
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mScrollButtonLeft = new LegendScrollButton(LegendScrollButton::ScrollButtonIdLeft, this);
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mScrollButtonRight = new LegendScrollButton(LegendScrollButton::ScrollButtonIdRight, this);
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mScrollButtonUp = new LegendScrollButton(LegendScrollButton::ScrollButtonIdUp, this);
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mScrollButtonDown = new LegendScrollButton(LegendScrollButton::ScrollButtonIdDown, this);
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connect(mScrollButtonLeft, SIGNAL(clicked(QGraphicsSceneMouseEvent*)),
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this, SLOT(handleScrollButtonClicked(QGraphicsSceneMouseEvent*)));
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connect(mScrollButtonRight, SIGNAL(clicked(QGraphicsSceneMouseEvent*)),
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this, SLOT(handleScrollButtonClicked(QGraphicsSceneMouseEvent*)));
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connect(mScrollButtonUp, SIGNAL(clicked(QGraphicsSceneMouseEvent*)),
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this, SLOT(handleScrollButtonClicked(QGraphicsSceneMouseEvent*)));
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connect(mScrollButtonDown, SIGNAL(clicked(QGraphicsSceneMouseEvent*)),
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this, SLOT(handleScrollButtonClicked(QGraphicsSceneMouseEvent*)));
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setZValue(ChartPresenter::LegendZValue);
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}
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/*!
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Paints the legend to given \a painter. Paremeters \a option and \a widget arent used.
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*/
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void QLegend::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
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{
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Q_UNUSED(option)
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Q_UNUSED(widget)
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painter->setOpacity(opacity());
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painter->setPen(m_pen);
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painter->setBrush(m_brush);
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painter->drawRect(boundingRect());
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}
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/*!
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Bounding rect of legend.
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*/
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QRectF QLegend::boundingRect() const
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{
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return QRectF(mPos,mSize);
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}
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/*!
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Sets the \a brush of legend. Brush affects the background of legend.
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*/
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void QLegend::setBrush(const QBrush &brush)
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{
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if (m_brush != brush) {
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m_brush = brush;
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update();
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}
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}
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/*!
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Returns the brush used by legend.
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*/
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QBrush QLegend::brush() const
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{
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return m_brush;
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}
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/*!
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Sets the \a pen of legend. Pen affects the legend borders.
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*/
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void QLegend::setPen(const QPen &pen)
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{
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if (m_pen != pen) {
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m_pen = pen;
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update();
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}
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}
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/*!
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Returns the pen used by legend
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*/
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QPen QLegend::pen() const
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{
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return m_pen;
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}
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/*!
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Sets the \a preferred layout for legend. Legend tries to paint itself on the defined position in chart.
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\sa QLegend::PreferredLayout
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*/
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void QLegend::setPreferredLayout(QLegend::PreferredLayout preferred)
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{
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mPreferredLayout = preferred;
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updateLayout();
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}
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/*!
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Returns the preferred layout for legend
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*/
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QLegend::PreferredLayout QLegend::preferredLayout() const
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{
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return mPreferredLayout;
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}
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/*!
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Returns the maximum size of legend.
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*/
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QSizeF QLegend::maximumSize() const
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{
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return mMaximumSize;
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}
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/*!
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Sets the maximum \a size for legend. The legend can't grow bigger than this size. If there are
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more series than legend can fit to this size, scroll buttons are displayed.
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*/
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void QLegend::setMaximumSize(const QSizeF size)
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{
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mMaximumSize = size;
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updateLayout();
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}
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/*!
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Returns the current size of legend.
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*/
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QSizeF QLegend::size() const
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{
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return mSize;
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}
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/*!
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Sets the \a size of legend. If size is bigger than maximum size of legend, the legend is resized to the maximum size.
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\sa setMmaximumSize()
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*/
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void QLegend::setSize(const QSizeF size)
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{
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mSize = size;
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if (mSize.width() > mMaximumSize.width()) {
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mSize.setWidth(mMaximumSize.width());
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}
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if (mSize.height() > mMaximumSize.height()) {
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mSize.setHeight(mMaximumSize.height());
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}
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}
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/*!
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Sets position of legend to \a pos
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*/
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void QLegend::setPos(const QPointF &pos)
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{
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mPos = pos;
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updateLayout();
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}
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/*!
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\internal \a series \a domain Should be called when series is added to chart.
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*/
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void QLegend::handleSeriesAdded(QSeries *series, Domain *domain)
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{
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Q_UNUSED(domain)
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createMarkers(series);
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connectSeries(series);
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updateLayout();
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}
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/*!
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\internal \a series Should be called when series is removed from chart.
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*/
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void QLegend::handleSeriesRemoved(QSeries *series)
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{
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disconnectSeries(series);
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if (series->type() == QSeries::SeriesTypeArea)
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{
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// This is special case. Area series has upper and lower series, which each have markers
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QAreaSeries* s = static_cast<QAreaSeries *> (series);
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deleteMarkers(s->upperSeries());
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deleteMarkers(s->lowerSeries());
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} else {
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deleteMarkers(series);
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}
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updateLayout();
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}
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/*!
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\internal \a slices Should be called when slices are added to pie chart.
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*/
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void QLegend::handleAdded(QList<QPieSlice *> slices)
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{
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QPieSeries* series = static_cast<QPieSeries *> (sender());
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foreach(QPieSlice* s, slices) {
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LegendMarker* marker = new LegendMarker(series, s, this);
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marker->setName(s->label());
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marker->setBrush(s->sliceBrush());
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connect(marker, SIGNAL(clicked(QPieSlice*,Qt::MouseButton)),
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this, SIGNAL(clicked(QPieSlice*,Qt::MouseButton)));
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connect(s, SIGNAL(changed()), marker, SLOT(changed()));
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connect(s, SIGNAL(destroyed()), marker, SLOT(deleteLater()));
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connect(marker, SIGNAL(destroyed()), this, SLOT(handleMarkerDestroyed()));
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mMarkers.append(marker);
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childItems().append(marker);
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}
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updateLayout();
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}
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/*!
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\internal \a slices Should be called when slices are removed from pie chart. Currently unused,
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because removed slices are also deleted and we listen destroyed signal
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*/
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void QLegend::handleRemoved(QList<QPieSlice *> slices)
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{
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Q_UNUSED(slices)
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// Propably no need to listen for this, since removed slices are deleted and we listen destroyed signal
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// qDebug() << "QLegend::handleRemoved(QList<QPieSlice*> slices) count:" << slices.count();
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}
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/*!
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\internal Notifies legend that some marker has been removed. Sent by legend markers when destroyed
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*/
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void QLegend::handleMarkerDestroyed()
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{
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// TODO: what if more than one markers are destroyed and we update layout after first one?
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LegendMarker* m = static_cast<LegendMarker *> (sender());
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mMarkers.removeOne(m);
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updateLayout();
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}
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/*!
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\internal \a event Handles clicked signals from scroll buttons
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*/
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void QLegend::handleScrollButtonClicked(QGraphicsSceneMouseEvent *event)
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{
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Q_UNUSED(event); // Maybe later something happens with right click...
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LegendScrollButton* scrollButton = static_cast<LegendScrollButton *> (sender());
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Q_ASSERT(scrollButton);
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switch (scrollButton->id()) {
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case LegendScrollButton::ScrollButtonIdLeft:
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case LegendScrollButton::ScrollButtonIdUp: {
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// Lower limit is same in these cases
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mFirstMarker--;
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checkFirstMarkerBounds();
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break;
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}
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case LegendScrollButton::ScrollButtonIdRight:
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case LegendScrollButton::ScrollButtonIdDown: {
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mFirstMarker++;
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checkFirstMarkerBounds();
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break;
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}
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default: {
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break;
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}
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}
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updateLayout();
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}
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/*!
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\internal Connects the \a series to legend. Legend listens changes in series, for example pie slices added / removed.
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Not all series notify about events
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*/
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void QLegend::connectSeries(QSeries *series)
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{
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// Connect relevant signals from series
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switch (series->type())
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{
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case QSeries::SeriesTypeLine: {
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// QLineSeries* lineSeries = static_cast<QLineSeries*>(series);
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break;
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}
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case QSeries::SeriesTypeArea: {
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// QAreaSeries* areaSeries = static_cast<QAreaSeries*>(series);
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break;
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}
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case QSeries::SeriesTypeBar: {
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// QBarSeries* barSeries = static_cast<QBarSeries*>(series);
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break;
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}
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case QSeries::SeriesTypeStackedBar: {
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// QStackedBarSeries* stackedBarSeries = static_cast<QStackedBarSeries*>(series);
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break;
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}
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case QSeries::SeriesTypePercentBar: {
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// QPercentBarSeries* percentBarSeries = static_cast<QPercentBarSeries*>(series);
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break;
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}
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case QSeries::SeriesTypeScatter: {
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// QScatterSeries *scatterSeries = static_cast<QScatterSeries *>(series);
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break;
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}
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case QSeries::SeriesTypePie: {
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QPieSeries *pieSeries = static_cast<QPieSeries *>(series);
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connect(pieSeries,SIGNAL(added(QList<QPieSlice*>)),this,SLOT(handleAdded(QList<QPieSlice*>)));
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// connect(pieSeries,SIGNAL(removed(QList<QPieSlice*>)),this,SLOT(handleRemoved(QList<QPieSlice*>)));
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break;
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}
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case QSeries::SeriesTypeSpline: {
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// QSplineSeries* splineSeries = static_cast<QSplineSeries*>(series);
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break;
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}
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default: {
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qDebug()<< "QLegend::connectSeries" << series->type() << "not implemented.";
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break;
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}
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}
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}
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/*!
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\internal Disconnects \a series from legend. No more status updates from series to legend.
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*/
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void QLegend::disconnectSeries(QSeries *series)
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{
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// Connect relevant signals from series
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switch (series->type())
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{
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case QSeries::SeriesTypeLine: {
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// QLineSeries* lineSeries = static_cast<QLineSeries*>(series);
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break;
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}
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case QSeries::SeriesTypeArea: {
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// QAreaSeries* areaSeries = static_cast<QAreaSeries*>(series);
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break;
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}
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case QSeries::SeriesTypeBar: {
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// QBarSeries* barSeries = static_cast<QBarSeries*>(series);
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break;
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}
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case QSeries::SeriesTypeStackedBar: {
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// QStackedBarSeries* stackedBarSeries = static_cast<QStackedBarSeries*>(series);
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break;
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}
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case QSeries::SeriesTypePercentBar: {
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// QPercentBarSeries* percentBarSeries = static_cast<QPercentBarSeries*>(series);
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break;
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}
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case QSeries::SeriesTypeScatter: {
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// QScatterSeries *scatterSeries = static_cast<QScatterSeries *>(series);
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break;
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}
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case QSeries::SeriesTypePie: {
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QPieSeries *pieSeries = static_cast<QPieSeries *>(series);
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disconnect(pieSeries, SIGNAL(added(QList<QPieSlice *>)), this, SLOT(handleAdded(QList<QPieSlice *>)));
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// disconnect(pieSeries,SIGNAL(removed(QList<QPieSlice*>)),this,SLOT(handleRemoved(QList<QPieSlice*>)));
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break;
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}
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case QSeries::SeriesTypeSpline: {
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// QSplineSeries* splineSeries = static_cast<QSplineSeries*>(series);
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break;
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}
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default: {
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qDebug()<< "QLegend::disconnectSeries" << series->type() << "not implemented.";
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break;
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}
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}
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}
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/*!
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\internal Creates new markers for \a series. Marker contains the colored rectangle and series name.
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With pie chart, created markers depend on pie slices.
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With bar chart, created markers depend on bar sets.
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*/
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void QLegend::createMarkers(QSeries *series)
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{
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switch (series->type())
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{
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case QSeries::SeriesTypeLine: {
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QLineSeries *lineSeries = static_cast<QLineSeries *>(series);
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appendMarkers(lineSeries);
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break;
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}
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case QSeries::SeriesTypeArea: {
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QAreaSeries *areaSeries = static_cast<QAreaSeries *>(series);
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appendMarkers(areaSeries->upperSeries());
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if(areaSeries->lowerSeries())
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appendMarkers(areaSeries->lowerSeries());
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break;
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}
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|
|
case QSeries::SeriesTypeBar: {
|
|
|
QBarSeries *barSeries = static_cast<QBarSeries *>(series);
|
|
|
appendMarkers(barSeries);
|
|
|
break;
|
|
|
}
|
|
|
|
|
|
case QSeries::SeriesTypeStackedBar: {
|
|
|
QStackedBarSeries *stackedBarSeries = static_cast<QStackedBarSeries *>(series);
|
|
|
appendMarkers(stackedBarSeries);
|
|
|
break;
|
|
|
}
|
|
|
|
|
|
case QSeries::SeriesTypePercentBar: {
|
|
|
QPercentBarSeries *percentBarSeries = static_cast<QPercentBarSeries *>(series);
|
|
|
appendMarkers(percentBarSeries);
|
|
|
break;
|
|
|
}
|
|
|
|
|
|
case QSeries::SeriesTypeScatter: {
|
|
|
QScatterSeries *scatterSeries = static_cast<QScatterSeries *>(series);
|
|
|
appendMarkers(scatterSeries);
|
|
|
break;
|
|
|
}
|
|
|
|
|
|
case QSeries::SeriesTypePie: {
|
|
|
QPieSeries *pieSeries = static_cast<QPieSeries *>(series);
|
|
|
appendMarkers(pieSeries);
|
|
|
break;
|
|
|
}
|
|
|
|
|
|
case QSeries::SeriesTypeSpline: {
|
|
|
QSplineSeries *splineSeries = static_cast<QSplineSeries *>(series);
|
|
|
appendMarkers(splineSeries);
|
|
|
break;
|
|
|
}
|
|
|
default: {
|
|
|
qDebug()<< "QLegend::createMarkers" << series->type() << "not implemented.";
|
|
|
break;
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/*!
|
|
|
\internal Helper function. Appends markers from \a series to legend.
|
|
|
*/
|
|
|
void QLegend::appendMarkers(QXYSeries* series)
|
|
|
{
|
|
|
LegendMarker* marker = new LegendMarker(series,this);
|
|
|
marker->setName(series->name());
|
|
|
marker->setPen(series->pen());
|
|
|
marker->setBrush(series->brush());
|
|
|
connect(marker, SIGNAL(clicked(QSeries *, Qt::MouseButton)), this, SIGNAL(clicked(QSeries *, Qt::MouseButton)));
|
|
|
connect(marker, SIGNAL(destroyed()), this, SLOT(handleMarkerDestroyed()));
|
|
|
mMarkers.append(marker);
|
|
|
childItems().append(marker);
|
|
|
}
|
|
|
|
|
|
/*!
|
|
|
\internal Helper function. Appends markers from \a series to legend.
|
|
|
*/
|
|
|
void QLegend::appendMarkers(QBarSeries *series)
|
|
|
{
|
|
|
foreach(QBarSet* s, series->barSets()) {
|
|
|
LegendMarker* marker = new LegendMarker(series, s, this);
|
|
|
marker->setName(s->name());
|
|
|
marker->setPen(s->pen());
|
|
|
marker->setBrush(s->brush());
|
|
|
connect(marker, SIGNAL(clicked(QBarSet *, Qt::MouseButton)),
|
|
|
this, SIGNAL(clicked(QBarSet *, Qt::MouseButton)));
|
|
|
connect(s, SIGNAL(valueChanged()), marker, SLOT(changed()));
|
|
|
connect(marker, SIGNAL(destroyed()), this, SLOT(handleMarkerDestroyed()));
|
|
|
mMarkers.append(marker);
|
|
|
childItems().append(marker);
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/*!
|
|
|
\internal Helper function. Appends markers from \a series to legend.
|
|
|
*/
|
|
|
void QLegend::appendMarkers(QPieSeries *series)
|
|
|
{
|
|
|
foreach(QPieSlice* s, series->slices()) {
|
|
|
LegendMarker* marker = new LegendMarker(series, s, this);
|
|
|
marker->setName(s->label());
|
|
|
marker->setPen(s->slicePen());
|
|
|
marker->setBrush(s->sliceBrush());
|
|
|
connect(marker, SIGNAL(clicked(QPieSlice *, Qt::MouseButton)),
|
|
|
this, SIGNAL(clicked(QPieSlice *, Qt::MouseButton)));
|
|
|
connect(s, SIGNAL(changed()), marker, SLOT(changed()));
|
|
|
connect(s, SIGNAL(destroyed()), marker, SLOT(deleteLater()));
|
|
|
connect(marker, SIGNAL(destroyed()), this, SLOT(handleMarkerDestroyed()));
|
|
|
mMarkers.append(marker);
|
|
|
childItems().append(marker);
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/*!
|
|
|
\internal Deletes all markers that are created from \a series
|
|
|
*/
|
|
|
void QLegend::deleteMarkers(QSeries *series)
|
|
|
{
|
|
|
// Search all markers that belong to given series and delete them.
|
|
|
foreach (LegendMarker *m, mMarkers) {
|
|
|
if (m->series() == series) {
|
|
|
mMarkers.removeOne(m);
|
|
|
delete m;
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/*!
|
|
|
\internal Updates layout of legend. Tries to fit as many markers as possible up to the maximum size of legend.
|
|
|
If items don't fit, sets the visibility of scroll buttons accordingly.
|
|
|
Causes legend to be resized.
|
|
|
*/
|
|
|
void QLegend::updateLayout()
|
|
|
{
|
|
|
// Calculate layout for markers and text
|
|
|
if (mMarkers.count() <= 0) {
|
|
|
// Nothing to do
|
|
|
return;
|
|
|
}
|
|
|
|
|
|
// Find out widest item.
|
|
|
QSizeF markerMaxSize = maximumMarkerSize();
|
|
|
checkFirstMarkerBounds();
|
|
|
|
|
|
// Use max height as scroll button size
|
|
|
rescaleScrollButtons(QSize(markerMaxSize.height() ,markerMaxSize.height()));
|
|
|
|
|
|
qreal totalWidth = 0;
|
|
|
qreal totalHeight = 0;
|
|
|
switch (mPreferredLayout)
|
|
|
{
|
|
|
// Both cases organise items horizontally
|
|
|
case QLegend::PreferredLayoutBottom:
|
|
|
case QLegend::PreferredLayoutTop: {
|
|
|
|
|
|
qreal xStep = markerMaxSize.width();
|
|
|
qreal x = mPos.x() + mMargin;
|
|
|
qreal y = mPos.y() + mMargin;
|
|
|
int column = 0;
|
|
|
int maxColumns = 1;
|
|
|
qreal scrollButtonWidth = 0;
|
|
|
|
|
|
// Set correct visibility for scroll scrollbuttons
|
|
|
if (scrollButtonsVisible()) {
|
|
|
mScrollButtonLeft->setVisible(true);
|
|
|
mScrollButtonRight->setVisible(true);
|
|
|
// scrollbuttons visible, so add their width to total width
|
|
|
totalWidth += (mScrollButtonLeft->boundingRect().width() + mMargin) * 2;
|
|
|
scrollButtonWidth = mScrollButtonLeft->boundingRect().width() + mMargin;
|
|
|
// start position changes by scrollbutton width
|
|
|
x += scrollButtonWidth;
|
|
|
} else {
|
|
|
mScrollButtonLeft->setVisible(false);
|
|
|
mScrollButtonRight->setVisible(false);
|
|
|
}
|
|
|
mScrollButtonUp->setVisible(false);
|
|
|
mScrollButtonDown->setVisible(false);
|
|
|
|
|
|
for (int i=0; i < mMarkers.count(); i++) {
|
|
|
LegendMarker *m = mMarkers.at(i);
|
|
|
if (i < mFirstMarker) {
|
|
|
// Markers before first are not visible.
|
|
|
m->setVisible(false);
|
|
|
} else {
|
|
|
if ((x + xStep + scrollButtonWidth + mMargin) > (mPos.x() + mMaximumSize.width())) {
|
|
|
// This marker would go outside legend rect.
|
|
|
m->setVisible(false);
|
|
|
} else {
|
|
|
// This marker is ok
|
|
|
m->setVisible(true);
|
|
|
m->setPos(x, y);
|
|
|
x += xStep;
|
|
|
column++;
|
|
|
}
|
|
|
}
|
|
|
maxColumns = column;
|
|
|
}
|
|
|
|
|
|
mScrollButtonLeft->setPos(mPos.x() + mMargin, y);
|
|
|
mScrollButtonRight->setPos(x + mMargin, y);
|
|
|
|
|
|
totalWidth += maxColumns * markerMaxSize.width() + mMargin * 2;
|
|
|
totalHeight = markerMaxSize.height() + mMargin * 2;
|
|
|
|
|
|
break;
|
|
|
}
|
|
|
// Both cases organize items vertically
|
|
|
case QLegend::PreferredLayoutLeft:
|
|
|
case QLegend::PreferredLayoutRight: {
|
|
|
qreal yStep = markerMaxSize.height();
|
|
|
qreal x = mPos.x() + mMargin;
|
|
|
qreal y = mPos.y() + mMargin;
|
|
|
int row = 1;
|
|
|
int maxRows = 1;
|
|
|
qreal scrollButtonHeight = 0;
|
|
|
|
|
|
// Set correct visibility for scroll scrollbuttons
|
|
|
if (scrollButtonsVisible()) {
|
|
|
mScrollButtonUp->setVisible(true);
|
|
|
mScrollButtonDown->setVisible(true);
|
|
|
totalHeight += (mScrollButtonUp->boundingRect().height() + mMargin) * 2; // scrollbuttons visible, so add their height to total height
|
|
|
scrollButtonHeight = mScrollButtonUp->boundingRect().height();
|
|
|
y += scrollButtonHeight + mMargin; // start position changes by scrollbutton height
|
|
|
} else {
|
|
|
mScrollButtonUp->setVisible(false);
|
|
|
mScrollButtonDown->setVisible(false);
|
|
|
}
|
|
|
mScrollButtonLeft->setVisible(false);
|
|
|
mScrollButtonRight->setVisible(false);
|
|
|
|
|
|
for (int i=0; i < mMarkers.count(); i++) {
|
|
|
LegendMarker* m = mMarkers.at(i);
|
|
|
if (i < mFirstMarker) {
|
|
|
// Markers before first are not visible.
|
|
|
m->setVisible(false);
|
|
|
} else {
|
|
|
if ((y + yStep + scrollButtonHeight) > (mPos.y() + mMaximumSize.height())) {
|
|
|
// This marker would go outside legend rect.
|
|
|
m->setVisible(false);
|
|
|
} else {
|
|
|
// This marker is ok
|
|
|
m->setVisible(true);
|
|
|
m->setPos(x, y);
|
|
|
y += yStep;
|
|
|
row++;
|
|
|
}
|
|
|
}
|
|
|
maxRows = row;
|
|
|
}
|
|
|
|
|
|
mScrollButtonUp->setPos(mPos.x() + mMargin, mPos.y() + mMargin);
|
|
|
mScrollButtonDown->setPos(mPos.x() + mMargin, y + mMargin);
|
|
|
|
|
|
totalWidth += markerMaxSize.width() + mMargin * 2;
|
|
|
totalHeight = maxRows * markerMaxSize.height() + mMargin * 4 + scrollButtonHeight; // TODO: check this
|
|
|
break;
|
|
|
}
|
|
|
default: {
|
|
|
break;
|
|
|
}
|
|
|
}
|
|
|
|
|
|
mSize.setWidth(totalWidth);
|
|
|
mSize.setHeight(totalHeight);
|
|
|
|
|
|
update();
|
|
|
}
|
|
|
|
|
|
/*!
|
|
|
\internal Sets the size of scroll buttons to \a size
|
|
|
*/
|
|
|
void QLegend::rescaleScrollButtons(const QSize &size)
|
|
|
{
|
|
|
QPolygonF left;
|
|
|
left << QPointF(size.width(), 0) << QPointF(0, size.height() / 2) << QPointF(size.width(), size.height());
|
|
|
QPolygonF right;
|
|
|
right << QPointF(0, 0) << QPointF(size.width(), size.height() / 2) << QPointF(0, size.height());
|
|
|
QPolygonF up;
|
|
|
up << QPointF(0, size.height()) << QPointF(size.width() / 2,0) << QPointF(size.width(), size.height());
|
|
|
QPolygonF down;
|
|
|
down << QPointF(0, 0) << QPointF(size.width() / 2, size.height()) << QPointF(size.width(), 0);
|
|
|
|
|
|
mScrollButtonLeft->setPolygon(left);
|
|
|
mScrollButtonRight->setPolygon(right);
|
|
|
mScrollButtonUp->setPolygon(up);
|
|
|
mScrollButtonDown->setPolygon(down);
|
|
|
}
|
|
|
|
|
|
/*!
|
|
|
\internal Finds out maximum size of single marker. Marker sizes depend on series names.
|
|
|
*/
|
|
|
QSizeF QLegend::maximumMarkerSize()
|
|
|
{
|
|
|
QSizeF max(0,0);
|
|
|
foreach (LegendMarker* m, mMarkers) {
|
|
|
if (m->boundingRect().width() > max.width())
|
|
|
max.setWidth(m->boundingRect().width());
|
|
|
if (m->boundingRect().height() > max.height())
|
|
|
max.setHeight(m->boundingRect().height());
|
|
|
}
|
|
|
return max;
|
|
|
}
|
|
|
|
|
|
/*!
|
|
|
\internal Checks that first marker is in acceptable bounds. Bounds range from 0 to (maximum number of markers - visible markers)
|
|
|
If scrollbuttons are visible, they affect the number of visible markers.
|
|
|
*/
|
|
|
void QLegend::checkFirstMarkerBounds()
|
|
|
{
|
|
|
if ((mPreferredLayout == QLegend::PreferredLayoutLeft) || (mPreferredLayout == QLegend::PreferredLayoutRight)) {
|
|
|
// Bounds limited by height.
|
|
|
int max;
|
|
|
if (scrollButtonsVisible()) {
|
|
|
max = (mMaximumSize.height() - mScrollButtonLeft->boundingRect().height() * 2 - mMargin * 4) / maximumMarkerSize().height();
|
|
|
} else {
|
|
|
max = mMaximumSize.height() / maximumMarkerSize().height();
|
|
|
}
|
|
|
|
|
|
if (mFirstMarker > mMarkers.count() - max)
|
|
|
mFirstMarker = mMarkers.count() - max;
|
|
|
} else {
|
|
|
// Bounds limited by width
|
|
|
int max;
|
|
|
if (scrollButtonsVisible()) {
|
|
|
max = (mMaximumSize.width() - mScrollButtonLeft->boundingRect().width() * 2 - mMargin*4) / maximumMarkerSize().width();
|
|
|
} else {
|
|
|
max = mMaximumSize.width() / maximumMarkerSize().width();
|
|
|
}
|
|
|
|
|
|
if (mFirstMarker > mMarkers.count() - max)
|
|
|
mFirstMarker = mMarkers.count() - max;
|
|
|
}
|
|
|
|
|
|
if (mFirstMarker < 0)
|
|
|
mFirstMarker = 0;
|
|
|
}
|
|
|
|
|
|
/*!
|
|
|
\internal Helper function. Visibility of scroll buttons isn't quite obvious, so helper function clarifies the logic.
|
|
|
*/
|
|
|
bool QLegend::scrollButtonsVisible()
|
|
|
{
|
|
|
// Just a helper to clarify, what the magic below means :)
|
|
|
if ((mPreferredLayout == QLegend::PreferredLayoutTop) || (mPreferredLayout == QLegend::PreferredLayoutBottom)) {
|
|
|
return (maximumMarkerSize().width() * mMarkers.count() + mMargin * 2 > mMaximumSize.width());
|
|
|
} else if ((mPreferredLayout == QLegend::PreferredLayoutLeft) || (mPreferredLayout == QLegend::PreferredLayoutRight)) {
|
|
|
return (maximumMarkerSize().height() * mMarkers.count() + mMargin * 2 > mMaximumSize.height());
|
|
|
}
|
|
|
|
|
|
return (maximumMarkerSize().height() * mMarkers.count() + mMargin * 2 > mMaximumSize.height());
|
|
|
}
|
|
|
|
|
|
#include "moc_qlegend.cpp"
|
|
|
|
|
|
QTCOMMERCIALCHART_END_NAMESPACE
|
|
|
|
