Base class for all drawable objects. More...

#include <qcustomplot.h>

Inheritance diagram for QCPLayerable:

Signals
void	layerChanged (QCPLayer *newLayer)

Public Member Functions
	QCPLayerable (QCustomPlot plot, QString targetLayer=QString(), QCPLayerable parentLayerable=0)

	~QCPLayerable ()

bool	visible () const

QCustomPlot *	parentPlot () const

QCPLayerable *	parentLayerable () const

QCPLayer *	layer () const

bool	antialiased () const

void	setVisible (bool on)

Q_SLOT bool	setLayer (QCPLayer *layer)

bool	setLayer (const QString &layerName)

void	setAntialiased (bool enabled)

virtual double	selectTest (const QPointF &pos, bool onlySelectable, QVariant *details=0) const

bool	realVisibility () const

Protected Member Functions
virtual void	parentPlotInitialized (QCustomPlot *parentPlot)

virtual QCP::Interaction	selectionCategory () const

virtual QRect	clipRect () const

virtual void	applyDefaultAntialiasingHint (QCPPainter *painter) const =0

virtual void	draw (QCPPainter *painter)=0

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

virtual void	deselectEvent (bool *selectionStateChanged)

void	initializeParentPlot (QCustomPlot *parentPlot)

void	setParentLayerable (QCPLayerable *parentLayerable)

bool	moveToLayer (QCPLayer *layer, bool prepend)

void	applyAntialiasingHint (QCPPainter *painter, bool localAntialiased, QCP::AntialiasedElement overrideElement) const

Protected Attributes
bool	mVisible

QCustomPlot *	mParentPlot

QPointer< QCPLayerable >	mParentLayerable

QCPLayer *	mLayer

bool	mAntialiased

Friends
class	QCustomPlot

class	QCPAxisRect

Detailed Description

Base class for all drawable objects.

This is the abstract base class most visible objects derive from, e.g. plottables, axes, grid etc.

Every layerable is on a layer (QCPLayer) which allows controlling the rendering order by stacking the layers accordingly.

For details about the layering mechanism, see the QCPLayer documentation.

Definition at line 413 of file qcustomplot.h.

Constructor & Destructor Documentation

QCPLayerable::QCPLayerable	(	QCustomPlot *	plot,
		QString	targetLayer = `QString()`,
		QCPLayerable *	parentLayerable = `0`
	)

Creates a new QCPLayerable instance.

Since QCPLayerable is an abstract base class, it can't be instantiated directly. Use one of the derived classes.

If plot is provided, it automatically places itself on the layer named targetLayer. If targetLayer is an empty string, it places itself on the current layer of the plot (see QCustomPlot::setCurrentLayer).

It is possible to provide 0 as plot. In that case, you should assign a parent plot at a later time with initializeParentPlot.

The layerable's parent layerable is set to parentLayerable, if provided. Direct layerable parents are mainly used to control visibility in a hierarchy of layerables. This means a layerable is only drawn, if all its ancestor layerables are also visible. Note that parentLayerable does not become the QObject-parent (for memory management) of this layerable, plot does.

Definition at line 936 of file qcustomplot.cpp.

QCPLayerable::~QCPLayerable ( )

Definition at line 953 of file qcustomplot.cpp.

Member Function Documentation

bool QCPLayerable::antialiased ( ) const

inline

Definition at line 432 of file qcustomplot.h.

void QCPLayerable::applyAntialiasingHint	(	QCPPainter *	painter,
		bool	localAntialiased,
		QCP::AntialiasedElement	overrideElement
	)		const

protected

Definition at line 1163 of file qcustomplot.cpp.

void QCPLayerable::applyDefaultAntialiasingHint ( QCPPainter * painter ) const

protectedpure virtual

Implemented in QCPColorScale, QCPPlotTitle, QCPLegend, QCPAbstractLegendItem, QCPAxisRect, QCPAbstractItem, QCPAbstractPlottable, QCPAxis, QCPGrid, and QCPLayoutElement.

QRect QCPLayerable::clipRect ( ) const

protectedvirtual

Reimplemented in QCPAbstractLegendItem, QCPAbstractItem, and QCPAbstractPlottable.

Definition at line 1219 of file qcustomplot.cpp.

void QCPLayerable::deselectEvent ( bool * selectionStateChanged )

protectedvirtual

Reimplemented in QCPPlotTitle, QCPLegend, QCPAbstractLegendItem, QCPAbstractItem, QCPAbstractPlottable, and QCPAxis.

Definition at line 1275 of file qcustomplot.cpp.

void QCPLayerable::draw ( QCPPainter * painter )

protectedpure virtual

void QCPLayerable::initializeParentPlot ( QCustomPlot * parentPlot )

protected

Definition at line 1093 of file qcustomplot.cpp.

QCPLayer* QCPLayerable::layer ( ) const

inline

Definition at line 431 of file qcustomplot.h.

void QCPLayerable::layerChanged ( QCPLayer * newLayer )

signal

This signal is emitted when the layer of this layerable changes, i.e. this layerable is moved to a different layer.

See also: setLayer

bool QCPLayerable::moveToLayer	(	QCPLayer *	layer,
		bool	prepend
	)

protected

Definition at line 1132 of file qcustomplot.cpp.

QCPLayerable * QCPLayerable::parentLayerable ( ) const

inline

Returns the parent layerable of this layerable. The parent layerable is used to provide visibility hierarchies in conjunction with the method realVisibility. This way, layerables only get drawn if their parent layerables are visible, too.

Note that a parent layerable is not necessarily also the QObject parent for memory management. Further, a layerable doesn't always have a parent layerable, so this function may return 0.

A parent layerable is set implicitly with when placed inside layout elements and doesn't need to be set manually by the user.

Definition at line 430 of file qcustomplot.h.

QCustomPlot* QCPLayerable::parentPlot ( ) const

inline

Definition at line 429 of file qcustomplot.h.

void QCPLayerable::parentPlotInitialized ( QCustomPlot * parentPlot )

protectedvirtual

Reimplemented in QCPLegend, and QCPLayoutElement.

Definition at line 1189 of file qcustomplot.cpp.

bool QCPLayerable::realVisibility ( ) const

Returns whether this layerable is visible, taking the visibility of the layerable parent and the visibility of the layer this layerable is on into account. This is the method that is consulted to decide whether a layerable shall be drawn or not.

If this layerable has a direct layerable parent (usually set via hierarchies implemented in subclasses, like in the case of QCPLayoutElement), this function returns true only if this layerable has its visibility set to true and the parent layerable's realVisibility returns true.

If this layerable doesn't have a direct layerable parent, returns the state of this layerable's visibility.

Definition at line 1029 of file qcustomplot.cpp.

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

protectedvirtual

Reimplemented in QCPPlotTitle, QCPLegend, QCPAbstractLegendItem, QCPAbstractItem, QCPAbstractPlottable, and QCPAxis.

Definition at line 1255 of file qcustomplot.cpp.

QCP::Interaction QCPLayerable::selectionCategory ( ) const

protectedvirtual

Reimplemented in QCPLegend, QCPAbstractLegendItem, QCPAbstractItem, QCPAbstractPlottable, and QCPAxis.

Definition at line 1205 of file qcustomplot.cpp.

double QCPLayerable::selectTest	(	const QPointF &	pos,
		bool	onlySelectable,
		QVariant *	details = `0`
	)		const

virtual

This function is used to decide whether a click hits a layerable object or not.

pos is a point in pixel coordinates on the QCustomPlot surface. This function returns the shortest pixel distance of this point to the object. If the object is either invisible or the distance couldn't be determined, -1.0 is returned. Further, if onlySelectable is true and the object is not selectable, -1.0 is returned, too.

If the item is represented not by single lines but by an area like QCPItemRect or QCPItemText, a click inside the area returns a constant value greater zero (typically the selectionTolerance of the parent QCustomPlot multiplied by 0.99). If the click lies outside the area, this function returns -1.0.

Providing a constant value for area objects allows selecting line objects even when they are obscured by such area objects, by clicking close to the lines (i.e. closer than 0.99*selectionTolerance).

The actual setting of the selection state is not done by this function. This is handled by the parent QCustomPlot when the mouseReleaseEvent occurs, and the finally selected object is notified via the selectEvent/deselectEvent methods.

details is an optional output parameter. Every layerable subclass may place any information in details. This information will be passed to selectEvent when the parent QCustomPlot decides on the basis of this selectTest call, that the object was successfully selected. The subsequent call to selectEvent will carry the details. This is useful for multi-part objects (like QCPAxis). This way, a possibly complex calculation to decide which part was clicked is only done once in selectTest. The result (i.e. the actually clicked part) can then be placed in details. So in the subsequent selectEvent, the decision which part was selected doesn't have to be done a second time for a single selection operation.

You may pass 0 as details to indicate that you are not interested in those selection details.

See also: selectEvent, deselectEvent, QCustomPlot::setInteractions

Reimplemented in QCPItemBracket, QCPItemTracer, QCPItemPixmap, QCPItemEllipse, QCPItemText, QCPItemRect, QCPItemCurve, QCPItemLine, QCPItemStraightLine, QCPFinancial, QCPColorMap, QCPStatisticalBox, QCPBars, QCPCurve, QCPGraph, QCPPlotTitle, QCPLegend, QCPAbstractLegendItem, QCPAbstractItem, QCPAbstractPlottable, QCPAxis, QCPLayoutInset, and QCPLayoutElement.

Definition at line 1068 of file qcustomplot.cpp.

void QCPLayerable::setAntialiased ( bool enabled )

Sets whether this object will be drawn antialiased or not.

Note that antialiasing settings may be overridden by QCustomPlot::setAntialiasedElements and QCustomPlot::setNotAntialiasedElements.

Definition at line 1011 of file qcustomplot.cpp.

bool QCPLayerable::setLayer ( QCPLayer * layer )

Sets the layer of this layerable object. The object will be placed on top of the other objects already on layer.

Returns true on success, i.e. if layer is a valid layer.

Definition at line 978 of file qcustomplot.cpp.

bool QCPLayerable::setLayer ( const QString & layerName )

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. Sets the layer of this layerable object by name

Returns true on success, i.e. if layerName is a valid layer name.

Definition at line 988 of file qcustomplot.cpp.

void QCPLayerable::setParentLayerable ( QCPLayerable * parentLayerable )

protected

Definition at line 1119 of file qcustomplot.cpp.

void QCPLayerable::setVisible ( bool on )

Sets the visibility of this layerable object. If an object is not visible, it will not be drawn on the QCustomPlot surface, and user interaction with it (e.g. click and selection) is not possible.

Definition at line 967 of file qcustomplot.cpp.

bool QCPLayerable::visible ( ) const

inline

Definition at line 428 of file qcustomplot.h.

Friends And Related Function Documentation

friend class QCPAxisRect

friend

Definition at line 477 of file qcustomplot.h.

friend class QCustomPlot

friend

Definition at line 476 of file qcustomplot.h.

Member Data Documentation

bool QCPLayerable::mAntialiased

protected

Definition at line 455 of file qcustomplot.h.

QCPLayer* QCPLayerable::mLayer

protected

Definition at line 454 of file qcustomplot.h.

QPointer<QCPLayerable> QCPLayerable::mParentLayerable

protected

Definition at line 453 of file qcustomplot.h.

QCustomPlot* QCPLayerable::mParentPlot

protected

Definition at line 452 of file qcustomplot.h.

bool QCPLayerable::mVisible

protected

Definition at line 451 of file qcustomplot.h.

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

Projects/VespucciProject/Vespucci/Vespucci/qcustomplot.h
Projects/VespucciProject/Vespucci/Vespucci/qcustomplot.cpp

Signals

Public Member Functions

Protected Member Functions

Protected Attributes

Friends

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation

Member Data Documentation