SparkLineDelegate Class Reference

Item delegate that renders a spark-line (miniature inline chart) for cells whose model data contains a series of numeric values. More...

#include <sparkline_delegate.h>

Inheritance diagram for SparkLineDelegate:

Public Member Functions
	SparkLineDelegate (QWidget *parent=0)
	Constructs a SparkLineDelegate.

Static Public Attributes
static constexpr int	SecondaryPointsRole = Qt::UserRole + 1
	Optional second value series, drawn over the primary one.
static constexpr int	GapValue = -1
	A negative value in either series marks a gap (a line break with a dashed bridge), used to show an interval where no data was sampled.

Protected Member Functions
void	paint (QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const override
	Renders the spark-line chart for the cell at index.
QSize	sizeHint (const QStyleOptionViewItem &option, const QModelIndex &index) const override
	Returns the preferred size for a spark-line cell.
QWidget *	createEditor (QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const override
	Suppresses inline editing by returning nullptr.

Detailed Description

Item delegate that renders a spark-line (miniature inline chart) for cells whose model data contains a series of numeric values.

Constructor & Destructor Documentation

SparkLineDelegate()

SparkLineDelegate::SparkLineDelegate ( QWidget * parent = 0 )

inline

Constructs a SparkLineDelegate.

Parameters

parent

Optional parent widget.

Member Function Documentation

createEditor()

QWidget * SparkLineDelegate::createEditor ( QWidget * parent, const QStyleOptionViewItem & option, const QModelIndex & index ) const

overrideprotected

Suppresses inline editing by returning nullptr.

Spark-line cells are display-only; no editor widget is created.

Parameters

parent	Unused parent widget.
option	Unused style option.
index	Unused model index.

Returns

Always nullptr.

paint()

void SparkLineDelegate::paint ( QPainter * painter, const QStyleOptionViewItem & option, const QModelIndex & index ) const

overrideprotected

Renders the spark-line chart for the cell at index.

Parameters

painter	Painter to draw with.
option	Style option providing geometry, palette, and state.
index	Model index of the cell being painted.

sizeHint()

QSize SparkLineDelegate::sizeHint ( const QStyleOptionViewItem & option, const QModelIndex & index ) const

overrideprotected

Returns the preferred size for a spark-line cell.

Parameters

option	Style option providing font metrics and state.
index	Model index of the cell being measured.

Returns

Recommended QSize for the cell.

Member Data Documentation

SecondaryPointsRole

int SparkLineDelegate::SecondaryPointsRole = Qt::UserRole + 1

staticconstexpr

Optional second value series, drawn over the primary one.

The primary series is read from Qt::UserRole (unchanged). A model may additionally provide a second QList<int> at this role (e.g. dropped packets); when present it is drawn on the same scale in a distinct theme color. Models that don't provide it render exactly one line as before.

---

The documentation for this class was generated from the following files:

• /builds/wireshark/wireshark/ui/qt/models/sparkline_delegate.h
• /builds/wireshark/wireshark/ui/qt/models/sparkline_delegate.cpp