The abstract base class for all items in a QCPLegend. More...

#include <qcustomplot.h>

Public Member Functions
	QCPAbstractLegendItem (QCPLegend *parent)

virtual	~QCPAbstractLegendItem ()

QFont	font () const

void	setFont (const QFont &font)

Protected Member Functions
virtual void	draw (QPainter *painter, const QRect &rect) const =0

virtual QSize	size (const QSize &targetSize) const =0

Protected Attributes
QCPLegend *	mParentLegend

QFont	mFont

Friends
class	QCPLegend

Detailed Description

The abstract base class for all items in a QCPLegend.

It defines a very basic interface to items in a QCPLegend. For representing plottables in the legend, the subclass QCPPlottableLegendItem is more suitable.

Only derive directly from this class when you need absolute freedom (i.e. a legend item that's not associated with a plottable).

You must implement the following pure virtual functions:

draw
size

You inherit the following members you may use:

QCPLegend *mParentLegend: A pointer to the parent QCPLegend.
QFont mFont: The generic font of the item. You should use this font for all or at least the most prominent text of the item.

Definition at line 512 of file qcustomplot.h.

Constructor & Destructor Documentation

◆ QCPAbstractLegendItem()

QCPAbstractLegendItem::QCPAbstractLegendItem ( QCPLegend * parent )

Constructs a QCPAbstractLegendItem and associates it with the QCPLegend parent. This does not cause the item to be added to parent, so QCPLegend::addItem must be called separately.

Definition at line 6368 of file qcustomplot.cc.

                                                               : 
   mParentLegend(parent),
   mFont(parent->font())
 {
 }

◆ ~QCPAbstractLegendItem()

virtual QCPAbstractLegendItem::~QCPAbstractLegendItem ( )

inlinevirtual

Definition at line 516 of file qcustomplot.h.

516 {}

Member Function Documentation

◆ draw()

void QCPAbstractLegendItem::draw	(	QPainter *	painter,
		const QRect &	rect
	)		const

protectedpure virtual

Draws this legend item with painter inside the specified rect. The rect typically has the size which was returned from a preceding size call.

Implemented in QCPPlottableLegendItem.

◆ font()

QFont QCPAbstractLegendItem::font ( ) const

inline

Definition at line 519 of file qcustomplot.h.

519 { return mFont; }

QCPAbstractLegendItem::mFont

QFont mFont

Definition: qcustomplot.h:525

◆ setFont()

void QCPAbstractLegendItem::setFont ( const QFont & font )

Sets the default font of this specific legend item to font.

See also: QCPLegend::setFont

Definition at line 6379 of file qcustomplot.cc.

 {
   mFont = font;
 }

◆ size()

QSize QCPAbstractLegendItem::size ( const QSize & targetSize ) const

protectedpure virtual

Returns the size this item occupies in the legend. The legend will adapt its layout with the help of this function. If this legend item can have a variable width (e.g. auto-wrapping text), this function tries to find a size with a width close to the width of targetSize. The height of targetSize only may have meaning in specific sublasses. Typically, it's ignored.

Implemented in QCPPlottableLegendItem.

Friends And Related Function Documentation

◆ QCPLegend

friend class QCPLegend

friend

Definition at line 530 of file qcustomplot.h.

Member Data Documentation

◆ mFont

QFont QCPAbstractLegendItem::mFont

protected

Definition at line 525 of file qcustomplot.h.

◆ mParentLegend

QCPLegend* QCPAbstractLegendItem::mParentLegend