QCPAbstractLegendItem

Inheritance diagram for QCPAbstractLegendItem:

[legend]

Signals
void	selectableChanged (bool selectable)

void	selectionChanged (bool selected)

Signals inherited from QCPLayerable
void	layerChanged (QCPLayer *newLayer)

Public Member Functions
	QCPAbstractLegendItem (QCPLegend *parent)

QFont	font () const

QCPLegend *	parentLegend () const

bool	selectable () const

bool	selected () const

QFont	selectedFont () const

QColor	selectedTextColor () const

virtual double	selectTest (const QPointF &pos, bool onlySelectable, QVariant *details=nullptr) const override

void	setFont (const QFont &font)

Q_SLOT void	setSelectable (bool selectable)

Q_SLOT void	setSelected (bool selected)

void	setSelectedFont (const QFont &font)

void	setSelectedTextColor (const QColor &color)

void	setTextColor (const QColor &color)

QColor	textColor () const

Public Member Functions inherited from QCPLayoutElement
	QCPLayoutElement (QCustomPlot *parentPlot=nullptr)

QCP::MarginSides	autoMargins () const

virtual QList< QCPLayoutElement * >	elements (bool recursive) const

QCPLayout *	layout () const

QCPMarginGroup *	marginGroup (QCP::MarginSide side) const

QHash< QCP::MarginSide, QCPMarginGroup * >	marginGroups () const

QMargins	margins () const

virtual QSize	maximumOuterSizeHint () const

QSize	maximumSize () const

QMargins	minimumMargins () const

virtual QSize	minimumOuterSizeHint () const

QSize	minimumSize () const

QRect	outerRect () const

QRect	rect () const

void	setAutoMargins (QCP::MarginSides sides)

void	setMarginGroup (QCP::MarginSides sides, QCPMarginGroup *group)

void	setMargins (const QMargins &margins)

void	setMaximumSize (const QSize &size)

void	setMaximumSize (int width, int height)

void	setMinimumMargins (const QMargins &margins)

void	setMinimumSize (const QSize &size)

void	setMinimumSize (int width, int height)

void	setOuterRect (const QRect &rect)

void	setSizeConstraintRect (SizeConstraintRect constraintRect)

SizeConstraintRect	sizeConstraintRect () const

virtual void	update (UpdatePhase phase)

Public Member Functions inherited from QCPLayerable
	QCPLayerable (QCustomPlot plot, QString targetLayer=QString(), QCPLayerable parentLayerable=nullptr)

bool	antialiased () const

QCPLayer *	layer () const

QCPLayerable *	parentLayerable () const

QCustomPlot *	parentPlot () const

bool	realVisibility () const

void	setAntialiased (bool enabled)

bool	setLayer (const QString &layerName)

Q_SLOT bool	setLayer (QCPLayer *layer)

void	setVisible (bool on)

bool	visible () const

Public Member Functions inherited from QObject
	QObject (QObject *parent)

QBindable< QString >	bindableObjectName ()

bool	blockSignals (bool block)

const QObjectList &	children () const const

QMetaObject::Connection	connect (const QObject sender, const char signal, const char *method, Qt::ConnectionType type) const const

void	deleteLater ()

void	destroyed (QObject *obj)

bool	disconnect (const char signal, const QObject receiver, const char *method) const const

bool	disconnect (const QObject receiver, const char method) const const

void	dumpObjectInfo () const const

void	dumpObjectTree () const const

QList< QByteArray >	dynamicPropertyNames () const const

virtual bool	event (QEvent *e)

virtual bool	eventFilter (QObject watched, QEvent event)

T	findChild (const QString &name, Qt::FindChildOptions options) const const

QList< T >	findChildren (const QRegularExpression &re, Qt::FindChildOptions options) const const

QList< T >	findChildren (const QString &name, Qt::FindChildOptions options) const const

QList< T >	findChildren (Qt::FindChildOptions options) const const

bool	inherits (const char *className) const const

void	installEventFilter (QObject *filterObj)

bool	isQuickItemType () const const

bool	isWidgetType () const const

bool	isWindowType () const const

void	killTimer (int id)

virtual const QMetaObject *	metaObject () const const

void	moveToThread (QThread *targetThread)

QString	objectName () const const

void	objectNameChanged (const QString &objectName)

QObject *	parent () const const

QVariant	property (const char *name) const const

	Q_CLASSINFO (Name, Value)

	Q_EMIT Q_EMIT

	Q_ENUM (...)

	Q_ENUM_NS (...)

	Q_ENUMS (...)

	Q_FLAG (...)

	Q_FLAG_NS (...)

	Q_FLAGS (...)

	Q_GADGET Q_GADGET

	Q_GADGET_EXPORT (EXPORT_MACRO)

	Q_INTERFACES (...)

	Q_INVOKABLE Q_INVOKABLE

	Q_MOC_INCLUDE Q_MOC_INCLUDE

	Q_NAMESPACE Q_NAMESPACE

	Q_NAMESPACE_EXPORT (EXPORT_MACRO)

	Q_OBJECT Q_OBJECT

	Q_PROPERTY (...)

	Q_REVISION Q_REVISION

	Q_SET_OBJECT_NAME (Object)

	Q_SIGNAL Q_SIGNAL

	Q_SIGNALS Q_SIGNALS

	Q_SLOT Q_SLOT

	Q_SLOTS Q_SLOTS

T	qobject_cast (const QObject *object)

T	qobject_cast (QObject *object)

	QT_NO_NARROWING_CONVERSIONS_IN_CONNECT QT_NO_NARROWING_CONVERSIONS_IN_CONNECT

void	removeEventFilter (QObject *obj)

void	setObjectName (const QString &name)

void	setObjectName (QAnyStringView name)

void	setParent (QObject *parent)

bool	setProperty (const char *name, const QVariant &value)

bool	setProperty (const char *name, QVariant &&value)

bool	signalsBlocked () const const

int	startTimer (int interval, Qt::TimerType timerType)

int	startTimer (std::chrono::milliseconds interval, Qt::TimerType timerType)

QThread *	thread () const const

Protected Member Functions
virtual void	applyDefaultAntialiasingHint (QCPPainter *painter) const override

virtual QRect	clipRect () const override

virtual void	deselectEvent (bool *selectionStateChanged) override

virtual void	draw (QCPPainter *painter) override=0

virtual void	selectEvent (QMouseEvent event, bool additive, const QVariant &details, bool selectionStateChanged) override

virtual QCP::Interaction	selectionCategory () const override

Protected Member Functions inherited from QCPLayoutElement
virtual int	calculateAutoMargin (QCP::MarginSide side)

virtual void	layoutChanged ()

virtual void	parentPlotInitialized (QCustomPlot *parentPlot) override

Protected Member Functions inherited from QCPLayerable
void	applyAntialiasingHint (QCPPainter *painter, bool localAntialiased, QCP::AntialiasedElement overrideElement) const

void	initializeParentPlot (QCustomPlot *parentPlot)

virtual void	mouseDoubleClickEvent (QMouseEvent *event, const QVariant &details)

virtual void	mouseMoveEvent (QMouseEvent *event, const QPointF &startPos)

virtual void	mousePressEvent (QMouseEvent *event, const QVariant &details)

virtual void	mouseReleaseEvent (QMouseEvent *event, const QPointF &startPos)

bool	moveToLayer (QCPLayer *layer, bool prepend)

void	setParentLayerable (QCPLayerable *parentLayerable)

virtual void	wheelEvent (QWheelEvent *event)

Protected Member Functions inherited from QObject
virtual void	childEvent (QChildEvent *event)

virtual void	connectNotify (const QMetaMethod &signal)

virtual void	customEvent (QEvent *event)

virtual void	disconnectNotify (const QMetaMethod &signal)

bool	isSignalConnected (const QMetaMethod &signal) const const

int	receivers (const char *signal) const const

QObject *	sender () const const

int	senderSignalIndex () const const

virtual void	timerEvent (QTimerEvent *event)

Protected Attributes
QFont	mFont

QCPLegend *	mParentLegend

bool	mSelectable

bool	mSelected

QFont	mSelectedFont

QColor	mSelectedTextColor

QColor	mTextColor

Protected Attributes inherited from QCPLayoutElement
QCP::MarginSides	mAutoMargins

QHash< QCP::MarginSide, QCPMarginGroup * >	mMarginGroups

QMargins	mMargins

QSize	mMaximumSize

QMargins	mMinimumMargins

QSize	mMinimumSize

QRect	mOuterRect

QCPLayout *	mParentLayout

QRect	mRect

SizeConstraintRect	mSizeConstraintRect

Protected Attributes inherited from QCPLayerable
bool	mAntialiased

QCPLayer *	mLayer

QPointer< QCPLayerable >	mParentLayerable

QCustomPlot *	mParentPlot

bool	mVisible

Additional Inherited Members
Public Types inherited from QCPLayoutElement
enum	SizeConstraintRect { scrInnerRect , scrOuterRect }

enum	UpdatePhase { upPreparation , upMargins , upLayout }

Properties inherited from QObject
	objectName

Static Public Member Functions inherited from QObject
QMetaObject::Connection	connect (const QObject sender, const char signal, const QObject receiver, const char method, Qt::ConnectionType type)

QMetaObject::Connection	connect (const QObject sender, const QMetaMethod &signal, const QObject receiver, const QMetaMethod &method, Qt::ConnectionType type)

QMetaObject::Connection	connect (const QObject sender, PointerToMemberFunction signal, const QObject context, Functor functor, Qt::ConnectionType type)

QMetaObject::Connection	connect (const QObject sender, PointerToMemberFunction signal, const QObject receiver, PointerToMemberFunction method, Qt::ConnectionType type)

QMetaObject::Connection	connect (const QObject *sender, PointerToMemberFunction signal, Functor functor)

bool	disconnect (const QMetaObject::Connection &connection)

bool	disconnect (const QObject sender, const char signal, const QObject receiver, const char method)

bool	disconnect (const QObject sender, const QMetaMethod &signal, const QObject receiver, const QMetaMethod &method)

bool	disconnect (const QObject sender, PointerToMemberFunction signal, const QObject receiver, PointerToMemberFunction method)

QString	tr (const char sourceText, const char disambiguation, int n)

Public Attributes inherited from QObject
typedef	QObjectList

Detailed Description

The abstract base class for all entries in a QCPLegend.

It defines a very basic interface for entries 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 (e.g. a custom legend entry that's not even associated with a plottable).

You must implement the following pure virtual functions:

draw (from QCPLayerable)

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 4992 of file qcustomplot.h.

Constructor & Destructor Documentation

◆ QCPAbstractLegendItem()

QCPAbstractLegendItem::QCPAbstractLegendItem ( QCPLegend * parent )

explicit

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 18748 of file qcustomplot.cpp.

Member Function Documentation

◆ applyDefaultAntialiasingHint()

void QCPAbstractLegendItem::applyDefaultAntialiasingHint ( QCPPainter * painter ) const

overrideprotectedvirtual

This function applies the default antialiasing setting to the specified painter, using the function applyAntialiasingHint. It is the antialiasing state the painter is put in, when draw is called on the layerable. If the layerable has multiple entities whose antialiasing setting may be specified individually, this function should set the antialiasing state of the most prominent entity. In this case however, the draw function usually calls the specialized versions of this function before drawing each entity, effectively overriding the setting of the default antialiasing hint.

First example: QCPGraph has multiple entities that have an antialiasing setting: The graph line, fills and scatters. Those can be configured via QCPGraph::setAntialiased, QCPGraph::setAntialiasedFill and QCPGraph::setAntialiasedScatters. Consequently, there isn't only the QCPGraph::applyDefaultAntialiasingHint function (which corresponds to the graph line's antialiasing), but specialized ones like QCPGraph::applyFillAntialiasingHint and QCPGraph::applyScattersAntialiasingHint. So before drawing one of those entities, QCPGraph::draw calls the respective specialized applyAntialiasingHint function.

Second example: QCPItemLine consists only of a line so there is only one antialiasing setting which can be controlled with QCPItemLine::setAntialiased. (This function is inherited by all layerables. The specialized functions, as seen on QCPGraph, must be added explicitly to the respective layerable subclass.) Consequently it only has the normal QCPItemLine::applyDefaultAntialiasingHint. The QCPItemLine::draw function doesn't need to care about setting any antialiasing states, because the default antialiasing hint is already set on the painter when the draw function is called, and that's the state it wants to draw the line with.

Reimplemented from QCPLayoutElement.

Definition at line 18850 of file qcustomplot.cpp.

◆ clipRect()

QRect QCPAbstractLegendItem::clipRect ( ) const

overrideprotectedvirtual

Returns the clipping rectangle of this layerable object. By default, this is the viewport of the parent QCustomPlot. Specific subclasses may reimplement this function to provide different clipping rects.

The returned clipping rect is set on the painter before the draw function of the respective object is called.

Reimplemented from QCPLayerable.

Definition at line 18856 of file qcustomplot.cpp.

◆ deselectEvent()

void QCPAbstractLegendItem::deselectEvent ( bool * selectionStateChanged )

overrideprotectedvirtual

This event is called when the layerable shall be deselected, either as consequence of a user interaction or a call to QCustomPlot::deselectAll. Subclasses should react to it by unsetting their selection appropriately.

just as in selectEvent, the output parameter selectionStateChanged (if non-null), must return true or false when the selection state of this layerable has changed or not changed, respectively.

See also: selectTest, selectEvent

Reimplemented from QCPLayerable.

Definition at line 18876 of file qcustomplot.cpp.

◆ draw()

virtual void QCPAbstractLegendItem::draw ( QCPPainter * painter )

overrideprotectedpure virtual

This function draws the layerable with the specified painter. It is only called by QCustomPlot, if the layerable is visible (setVisible).

Before this function is called, the painter's antialiasing state is set via applyDefaultAntialiasingHint, see the documentation there. Further, the clipping rectangle was set to clipRect.

Reimplemented from QCPLayoutElement.

Implemented in QCPPlottableLegendItem, and QCPPolarLegendItem.

◆ font()

QFont QCPAbstractLegendItem::font ( ) const

inline

Definition at line 5009 of file qcustomplot.h.

◆ parentLegend()

QCPLegend * QCPAbstractLegendItem::parentLegend ( ) const

inline

Definition at line 5008 of file qcustomplot.h.

◆ selectable()

bool QCPAbstractLegendItem::selectable ( ) const

inline

Definition at line 5013 of file qcustomplot.h.

◆ selected()

bool QCPAbstractLegendItem::selected ( ) const

inline

Definition at line 5014 of file qcustomplot.h.

◆ selectedFont()

QFont QCPAbstractLegendItem::selectedFont ( ) const

inline

Definition at line 5011 of file qcustomplot.h.

◆ selectedTextColor()

QColor QCPAbstractLegendItem::selectedTextColor ( ) const

inline

Definition at line 5012 of file qcustomplot.h.

◆ selectEvent()

void QCPAbstractLegendItem::selectEvent	(	QMouseEvent *	event,
		bool	additive,
		const QVariant &	details,
		bool *	selectionStateChanged )

overrideprotectedvirtual

This event is called when the layerable shall be selected, as a consequence of a click by the user. Subclasses should react to it by setting their selection state appropriately. The default implementation does nothing.

event is the mouse event that caused the selection. additive indicates, whether the user was holding the multi-select-modifier while performing the selection (see QCustomPlot::setMultiSelectModifier). if additive is true, the selection state must be toggled (i.e. become selected when unselected and unselected when selected).

Every selectEvent is preceded by a call to selectTest, which has returned positively (i.e. returned a value greater than 0 and less than the selection tolerance of the parent QCustomPlot). The details data you output from selectTest is fed back via details here. You may use it to transport any kind of information from the selectTest to the possibly subsequent selectEvent. Usually details is used to transfer which part was clicked, if it is a layerable that has multiple individually selectable parts (like QCPAxis). This way selectEvent doesn't need to do the calculation again to find out which part was actually clicked.

selectionStateChanged is an output parameter. If the pointer is non-null, this function must set the value either to true or false, depending on whether the selection state of this layerable was actually changed. For layerables that only are selectable as a whole and not in parts, this is simple: if additive is true, selectionStateChanged must also be set to true, because the selection toggles. If additive is false, selectionStateChanged is only set to true, if the layerable was previously unselected and now is switched to the selected state.

See also: selectTest, deselectEvent

Reimplemented from QCPLayerable.

Definition at line 18862 of file qcustomplot.cpp.

◆ selectionCategory()

QCP::Interaction QCPAbstractLegendItem::selectionCategory ( ) const

overrideprotectedvirtual

Returns the selection category this layerable shall belong to. The selection category is used in conjunction with QCustomPlot::setInteractions to control which objects are selectable and which aren't.

Subclasses that don't fit any of the normal QCP::Interaction values can use QCP::iSelectOther. This is what the default implementation returns.

See also: QCustomPlot::setInteractions

Reimplemented from QCPLayerable.

Definition at line 19613 of file qcustomplot.cpp.

◆ selectionChanged

void QCPAbstractLegendItem::selectionChanged ( bool selected )

signal

This signal is emitted when the selection state of this legend item has changed, either by user interaction or by a direct call to setSelected.

◆ selectTest()

double QCPAbstractLegendItem::selectTest	(	const QPointF &	pos,
		bool	onlySelectable,
		QVariant *	details = nullptr ) const

overridevirtual

Layout elements are sensitive to events inside their outer rect. If pos is within the outer rect, this method returns a value corresponding to 0.99 times the parent plot's selection tolerance. However, layout elements are not selectable by default. So if onlySelectable is true, -1.0 is returned.

See QCPLayerable::selectTest for a general explanation of this virtual method.

QCPLayoutElement subclasses may reimplement this method to provide more specific selection test behaviour.

Reimplemented from QCPLayoutElement.

Definition at line 18836 of file qcustomplot.cpp.

◆ setFont()

void QCPAbstractLegendItem::setFont ( const QFont & font )

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

See also: setTextColor, QCPLegend::setFont

Definition at line 18767 of file qcustomplot.cpp.

◆ setSelectable()

void QCPAbstractLegendItem::setSelectable ( bool selectable )

Sets whether this specific legend item is selectable.

See also: setSelectedParts, QCustomPlot::setInteractions

Definition at line 18809 of file qcustomplot.cpp.

◆ setSelected()

void QCPAbstractLegendItem::setSelected ( bool selected )

Sets whether this specific legend item is selected.

It is possible to set the selection state of this item by calling this function directly, even if setSelectable is set to false.

See also: setSelectableParts, QCustomPlot::setInteractions

Definition at line 18826 of file qcustomplot.cpp.

◆ setSelectedFont()

void QCPAbstractLegendItem::setSelectedFont ( const QFont & font )

When this legend item is selected, font is used to draw generic text, instead of the normal font set with setFont.

See also: setFont, QCPLegend::setSelectedFont

Definition at line 18788 of file qcustomplot.cpp.

◆ setSelectedTextColor()

void QCPAbstractLegendItem::setSelectedTextColor ( const QColor & color )

When this legend item is selected, color is used to draw generic text, instead of the normal color set with setTextColor.

See also: setTextColor, QCPLegend::setSelectedTextColor

Definition at line 18799 of file qcustomplot.cpp.

◆ setTextColor()

void QCPAbstractLegendItem::setTextColor ( const QColor & color )

Sets the default text color of this specific legend item to color.

See also: setFont, QCPLegend::setTextColor

Definition at line 18777 of file qcustomplot.cpp.

◆ textColor()

QColor QCPAbstractLegendItem::textColor ( ) const

inline

Definition at line 5010 of file qcustomplot.h.

Member Data Documentation

◆ mFont

QFont QCPAbstractLegendItem::mFont

protected

Definition at line 5034 of file qcustomplot.h.

◆ mParentLegend

QCPLegend* QCPAbstractLegendItem::mParentLegend

protected

Definition at line 5033 of file qcustomplot.h.

◆ mSelectable

bool QCPAbstractLegendItem::mSelectable

protected

Definition at line 5038 of file qcustomplot.h.

◆ mSelected

bool QCPAbstractLegendItem::mSelected

protected

Definition at line 5038 of file qcustomplot.h.

◆ mSelectedFont

QFont QCPAbstractLegendItem::mSelectedFont

protected

Definition at line 5036 of file qcustomplot.h.

◆ mSelectedTextColor

QColor QCPAbstractLegendItem::mSelectedTextColor

protected

Definition at line 5037 of file qcustomplot.h.

◆ mTextColor

QColor QCPAbstractLegendItem::mTextColor

protected

Definition at line 5035 of file qcustomplot.h.

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

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QCPAbstractLegendItem

Signals

Public Member Functions

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ QCPAbstractLegendItem()

Member Function Documentation

◆ applyDefaultAntialiasingHint()

◆ clipRect()

◆ deselectEvent()

◆ draw()

◆ font()

◆ parentLegend()

◆ selectable()

◆ selected()

◆ selectedFont()

◆ selectedTextColor()

◆ selectEvent()

◆ selectionCategory()

◆ selectionChanged

◆ selectTest()

◆ setFont()

◆ setSelectable()

◆ setSelected()

◆ setSelectedFont()

◆ setSelectedTextColor()

◆ setTextColor()

◆ textColor()

Member Data Documentation

◆ mFont

◆ mParentLegend

◆ mSelectable

◆ mSelected

◆ mSelectedFont

◆ mSelectedTextColor

◆ mTextColor