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#include "qpieslice.h"
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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#define DEFAULT_PEN_COLOR Qt::black
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#define DEFAULT_BRUSH_COLOR Qt::white
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#define DEFAULT_LABEL_ARM_LENGTH_FACTOR 0.15
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#define DEFAULT_EXPOLODE_DISTANCE_FACTOR 0.15
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/*!
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\class QPieSlice
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\brief Defines a slice in pie series.
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Holds all the data of a single slice in a QPieSeries and provides the means
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to modify slice data and customize the visual appearance of the slice.
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It also provides the means to customize user interaction with the slice by
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providing signals for clicking and hover events.
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*/
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/*!
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\property QPieSlice::label
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Label of the slice.
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*/
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/*!
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\property QPieSlice::value
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Value of the slice.
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*/
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/*!
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Constructs an empty slice with a \a parent.
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Note that QPieSeries takes ownership of the slice when it is set/added.
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\sa QPieSeries::replace(), QPieSeries::add()
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*/
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QPieSlice::QPieSlice(QObject *parent)
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:QObject(parent),
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m_value(0),
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m_isLabelVisible(false),
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m_isExploded(false),
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m_explodeDistanceFactor(DEFAULT_EXPOLODE_DISTANCE_FACTOR),
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m_percentage(0),
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m_startAngle(0),
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m_angleSpan(0),
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m_slicePen(DEFAULT_PEN_COLOR),
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m_sliceBrush(DEFAULT_BRUSH_COLOR),
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m_labelArmPen(DEFAULT_PEN_COLOR),
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m_labelArmLengthFactor(DEFAULT_LABEL_ARM_LENGTH_FACTOR)
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{
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}
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/*!
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Constructs an empty slice with given \a value, \a label and a \a parent.
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Note that QPieSeries takes ownership of the slice when it is set/added.
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\sa QPieSeries::replace(), QPieSeries::add()
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*/
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QPieSlice::QPieSlice(qreal value, QString label, QObject *parent)
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:QObject(parent),
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m_value(value),
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m_label(label),
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m_isLabelVisible(false),
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m_isExploded(false),
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m_explodeDistanceFactor(DEFAULT_EXPOLODE_DISTANCE_FACTOR),
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m_percentage(0),
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m_startAngle(0),
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m_angleSpan(0),
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m_slicePen(DEFAULT_PEN_COLOR),
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m_sliceBrush(DEFAULT_BRUSH_COLOR),
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m_labelArmPen(DEFAULT_PEN_COLOR),
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m_labelArmLengthFactor(DEFAULT_LABEL_ARM_LENGTH_FACTOR)
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{
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}
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/*!
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Destroys the slice.
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User should not delete the slice if it has been added to the series.
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*/
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QPieSlice::~QPieSlice()
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{
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}
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/*!
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Gets the value of the slice.
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Note that all values in the series
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\sa setValue()
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*/
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qreal QPieSlice::value() const
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{
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return m_value;
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}
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/*!
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Gets the label of the slice.
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\sa setLabel()
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*/
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QString QPieSlice::label() const
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{
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return m_label;
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}
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/*!
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Returns true if label is set as visible.
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\sa setLabelVisible()
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*/
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bool QPieSlice::isLabelVisible() const
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{
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return m_isLabelVisible;
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}
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/*!
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Returns true if slice is exloded from the pie.
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\sa setExploded(), setExplodeDistanceFactor()
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*/
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bool QPieSlice::isExploded() const
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{
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return m_isExploded;
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}
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/*!
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Returns the explode distance factor.
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The factor is relative to pie radius. For example:
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1.0 means the distance is the same as the radius.
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0.5 means the distance is half of the radius.
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Default value is 0.15.
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\sa setExplodeDistanceFactor()
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*/
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qreal QPieSlice::explodeDistanceFactor() const
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{
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return m_explodeDistanceFactor;
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}
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/*!
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Returns the percentage of this slice compared to all slices in the same series.
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The returned value ranges from 0 to 1.0.
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Updated internally after the slice is added to the series.
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*/
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qreal QPieSlice::percentage() const
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{
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return m_percentage;
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}
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/*!
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Returns the starting angle of this slice in the series it belongs to.
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Full pie is 360 degrees where 0 degrees is at 12 a'clock.
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Updated internally after the slice is added to the series.
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*/
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qreal QPieSlice::startAngle() const
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{
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return m_startAngle;
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}
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/*!
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Returns the end angle of this slice in the series it belongs to.
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Full pie is 360 degrees where 0 degrees is at 12 a'clock.
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Updated internally after the slice is added to the series.
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*/
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qreal QPieSlice::endAngle() const
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{
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return m_startAngle + m_angleSpan;
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}
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/*!
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Returns the pen used to draw this slice.
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\sa setSlicePen()
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*/
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QPen QPieSlice::slicePen() const
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{
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return m_slicePen;
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}
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/*!
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Returns the brush used to draw this slice.
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\sa setSliceBrush()
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*/
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QBrush QPieSlice::sliceBrush() const
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{
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return m_sliceBrush;
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}
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/*!
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Returns the pen used to draw label arm in this slice.
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\sa setLabelArmPen()
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*/
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QPen QPieSlice::labelArmPen() const
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{
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return m_labelArmPen;
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}
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/*!
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Returns the font used to draw label in this slice.
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\sa setLabelFont()
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*/
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QFont QPieSlice::labelFont() const
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{
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return m_labelFont;
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}
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/*!
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Gets the label arm lenght factor.
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The factor is relative to pie radius. For example:
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1.0 means the length is the same as the radius.
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0.5 means the length is half of the radius.
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Default value is 0.15
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\sa setLabelArmLengthFactor()
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*/
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qreal QPieSlice::labelArmLengthFactor() const
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{
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return m_labelArmLengthFactor;
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}
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/*!
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\fn void QPieSlice::clicked()
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This signal is emitted when user has clicked the slice.
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\sa QPieSeries::clicked()
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*/
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/*!
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\fn void QPieSlice::hoverEnter()
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This signal is emitted when user has hovered over the slice.
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\sa QPieSeries::hoverEnter()
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*/
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/*!
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\fn void QPieSlice::hoverLeave()
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This signal is emitted when user has hovered away from the slice.
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\sa QPieSeries::hoverLeave()
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*/
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/*!
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\fn void QPieSlice::changed()
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This signal emitted when something has changed in the slice.
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\sa QPieSeries::changed()
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*/
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/*!
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Sets the \a value of this slice.
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\sa value()
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*/
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void QPieSlice::setValue(qreal value)
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{
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if (m_value != value) {
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m_value = value;
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emit changed();
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}
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}
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/*!
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Sets the \a label of the slice.
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\sa label()
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*/
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void QPieSlice::setLabel(QString label)
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{
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if (m_label != label) {
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m_label = label;
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emit changed();
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}
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}
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/*!
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Sets the label \a visible in this slice.
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\sa isLabelVisible(), QPieSeries::setLabelsVisible()
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*/
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void QPieSlice::setLabelVisible(bool visible)
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{
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if (m_isLabelVisible != visible) {
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m_isLabelVisible = visible;
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emit changed();
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}
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}
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/*!
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Sets this slice \a exploded.
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\sa isExploded(), explodeDistanceFactor()
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*/
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void QPieSlice::setExploded(bool exploded)
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{
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if (m_isExploded != exploded) {
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m_isExploded = exploded;
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emit changed();
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}
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}
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/*!
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Sets the explode distance \a factor.
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The factor is relative to pie radius. For example:
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1.0 means the distance is the same as the radius.
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0.5 means the distance is half of the radius.
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Default value is 0.15
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\sa explodeDistanceFactor()
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*/
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void QPieSlice::setExplodeDistanceFactor(qreal factor)
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{
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if (m_explodeDistanceFactor != factor) {
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m_explodeDistanceFactor = factor;
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emit changed();
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}
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}
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/*!
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Sets the \a pen used to draw this slice.
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Note that applying a theme will override this.
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\sa slicePen()
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*/
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void QPieSlice::setSlicePen(const QPen &pen)
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{
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if (m_slicePen != pen) {
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m_slicePen = pen;
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emit changed();
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}
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}
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/*!
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Sets the \a brush used to draw this slice.
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Note that applying a theme will override this.
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\sa sliceBrush()
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*/
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void QPieSlice::setSliceBrush(const QBrush &brush)
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{
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if (m_sliceBrush != brush) {
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m_sliceBrush = brush;
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emit changed();
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}
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}
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/*!
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Sets the \a pen used to draw the label arm in this slice.
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Note that applying a theme will override this.
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\sa labelArmPen()
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*/
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void QPieSlice::setLabelArmPen(const QPen &pen)
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{
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if (m_labelArmPen != pen) {
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m_labelArmPen = pen;
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emit changed();
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}
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}
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/*!
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Sets the \a font used to draw the label in this slice.
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Note that applying a theme will override this.
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\sa labelFont()
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*/
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void QPieSlice::setLabelFont(const QFont &font)
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{
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if (m_labelFont != font) {
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m_labelFont = font;
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emit changed();
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}
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}
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/*!
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Sets the label arm lenght \a factor.
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The factor is relative to pie radius. For example:
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1.0 means the length is the same as the radius.
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0.5 means the length is half of the radius.
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Default value is 0.15
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\sa labelArmLengthFactor()
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*/
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void QPieSlice::setLabelArmLengthFactor(qreal factor)
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{
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if (m_labelArmLengthFactor != factor) {
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m_labelArmLengthFactor = factor;
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emit changed();
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}
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}
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#include "moc_qpieslice.cpp"
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QTCOMMERCIALCHART_END_NAMESPACE
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