#include <ccanvas.h>

Description

Abstract base class for figures that display text. Text may be multi-line.

The location of the text on the canvas is determined jointly by the position and anchor properties. The anchor tells how to position the text relative to the positioning point. For example, if anchor is ANCHOR_CENTER then the text is centered on the point; if anchor is ANCHOR_N then the text will be drawn so that its top center is at the positioning point. The values ANCHOR_BASELINE_START, ANCHOR_BASELINE_MIDDLE, ANCHOR_BASELINE_END refer to the beginning, middle and end of the baseline of the (first line of the) text as anchor point. The chosen alignment mode does not affect this, the baseline anchor points always behave as if the first line spanned the entire width of the bounding box. Anchor defaults to ANCHOR_CENTER.

Other properties in this class define the font, color and opacity of the text.

Inheritance diagram for cAbstractTextFigure:

Public Member Functions
Constructors, destructor, assignment.
	cAbstractTextFigure (const char *name=nullptr)

	cAbstractTextFigure (const cAbstractTextFigure &other)

cAbstractTextFigure &	operator= (const cAbstractTextFigure &other)

Redefined cObject and cFigure member functions.
virtual cAbstractTextFigure *	dup () const override

virtual std::string	str () const override

virtual void	parse (cProperty *property) override

virtual void	moveLocal (double dx, double dy) override

Geometry
virtual const Point &	getPosition () const

virtual void	setPosition (const Point &position)

virtual Anchor	getAnchor () const

virtual void	setAnchor (Anchor anchor)

virtual Alignment	getAlignment () const

virtual void	setAlignment (Alignment alignment)

virtual Rectangle	getBounds () const

Styling
virtual const Color &	getColor () const

virtual void	setColor (const Color &color)

virtual double	getOpacity () const

virtual void	setOpacity (double opacity)

virtual bool	getHalo () const

virtual void	setHalo (bool enabled)

virtual const Font &	getFont () const

virtual void	setFont (Font font)

Input
virtual const char *	getText () const

virtual void	setText (const char *text)

Public Member Functions inherited from cFigure
	cFigure (const char *name=nullptr)

	cFigure (const cFigure &other)

virtual	~cFigure ()

cFigure &	operator= (const cFigure &other)

virtual void	forEachChild (cVisitor *v) override

int	getId () const

virtual bool	isVisible () const

virtual void	setVisible (bool visible)

virtual const Transform &	getTransform () const

virtual void	setTransform (const Transform &transform)

virtual void	resetTransform ()

virtual double	getZIndex () const

virtual void	setZIndex (double zIndex)

virtual double	getEffectiveZIndex () const

virtual const char *	getTooltip () const

virtual void	setTooltip (const char *tooltip)

virtual cObject *	getAssociatedObject () const

virtual void	setAssociatedObject (cObject *obj)

virtual const char *	getTags () const

virtual void	setTags (const char *tags)

virtual cFigure *	getParentFigure () const

virtual cCanvas *	getCanvas () const

virtual int	getNumFigures () const

virtual cFigure *	getFigure (int pos) const

virtual cFigure *	getFigure (const char *name) const

virtual int	findFigure (const char *name) const

virtual int	findFigure (const cFigure *figure) const

virtual bool	containsFigures () const

virtual cFigure *	findFigureRecursively (const char *name) const

virtual cFigure *	getFigureByPath (const char *path) const

virtual void	addFigure (cFigure *figure)

virtual void	addFigure (cFigure *figure, int pos)

virtual cFigure *	removeFigure (cFigure *figure)

virtual cFigure *	removeFigure (int pos)

virtual cFigure *	removeFromParent ()

virtual bool	isAbove (const cFigure *figure) const

virtual bool	isBelow (const cFigure *figure) const

virtual void	insertAbove (cFigure *referenceFigure)

virtual void	insertBelow (cFigure *referenceFigure)

virtual void	insertAfter (const cFigure *referenceFigure)

virtual void	insertBefore (const cFigure *referenceFigure)

virtual void	raiseAbove (cFigure *figure)

virtual void	lowerBelow (cFigure *figure)

virtual void	raiseToTop ()

virtual void	lowerToBottom ()

virtual cFigure *	dupTree () const

virtual void	translate (double dx, double dy)

virtual void	scale (double s)

virtual void	scale (double sx, double sy)

virtual void	scale (double sx, double sy, double cx, double cy)

virtual void	scale (double sx, double sy, const Point &c)

virtual void	rotate (double phi)

virtual void	rotate (double phi, double cx, double cy)

virtual void	rotate (double phi, const Point &c)

virtual void	skewx (double coeff)

virtual void	skewy (double coeff)

virtual void	skewx (double coeff, double cy)

virtual void	skewy (double coeff, double cx)

virtual void	move (double dx, double dy)

virtual void	refreshDisplay ()

virtual const char *	getRendererClassName () const =0

virtual void	updateParentTransform (Transform &transform)

virtual void	callRefreshDisplay ()

uint8_t	getLocalChangeFlags () const

uint8_t	getSubtreeChangeFlags () const

void	clearChangeFlags ()

void	refreshTagBitsRec (cCanvas *ownerCanvas)

int64_t	getTagBits () const

void	setTagBits (uint64_t tagBits)

uint32_t	getHash () const

void	clearCachedHash ()

Public Member Functions inherited from cOwnedObject
	cOwnedObject ()

	cOwnedObject (const char *name, bool namepooling=true)

	cOwnedObject (const cOwnedObject &obj)

virtual	~cOwnedObject ()

cOwnedObject &	operator= (const cOwnedObject &o)

virtual void	parsimPack (cCommBuffer *buffer) const override

virtual void	parsimUnpack (cCommBuffer *buffer) override

virtual cObject *	getOwner () const override

virtual bool	isOwnedObject () const override

Public Member Functions inherited from cNamedObject
	cNamedObject ()

	cNamedObject (const char *name, bool namepooling=true)

	cNamedObject (const cNamedObject &obj)

virtual	~cNamedObject ()

cNamedObject &	operator= (const cNamedObject &o)

virtual void	setName (const char *s)

virtual const char *	getName () const override

virtual void	setNamePooling (bool b)

virtual bool	getNamePooling ()

Public Member Functions inherited from cObject
	cObject ()

	cObject (const cObject &other)=default

virtual	~cObject ()

virtual const char *	getClassName () const

bool	isName (const char *s) const

virtual const char *	getFullName () const

virtual std::string	getFullPath () const

virtual std::string	getClassAndFullName () const

virtual std::string	getClassAndFullPath () const

const cObject *	getThisPtr () const

virtual std::ostream &	printOn (std::ostream &os) const

virtual bool	isSoftOwner () const

cObject *	findObject (const char *name, bool deep=true)

virtual cClassDescriptor *	getDescriptor () const

void	copyNotSupported () const

Protected Member Functions
virtual const char **	getAllowedPropertyKeys () const override

Protected Member Functions inherited from cFigure
virtual void	validatePropertyKeys (cProperty *property) const

virtual bool	isAllowedPropertyKey (const char *key) const

virtual cFigure *	getRootFigure () const

void	fireStructuralChange ()

void	fireTransformChange ()

void	fireGeometryChange ()

void	fireVisualChange ()

void	fireInputDataChange ()

virtual void	fire (uint8_t flags)

Protected Member Functions inherited from cObject
virtual void	take (cOwnedObject *obj)

virtual void	drop (cOwnedObject *obj)

void	dropAndDelete (cOwnedObject *obj)

Additional Inherited Members
Public Types inherited from cFigure
enum	FontStyle
	Font style constants: FONT_NONE, FONT_BOLD, etc. More...

enum	LineStyle
	Line style constants: LINE_SOLID, LINE_DOTTED, etc. More...

enum	CapStyle
	Line cap style constants: CAP_BUTT, CAP_SQUARE, etc. More...

enum	JoinStyle
	Line join style constants: JOIN_BEVEL, JOIN_MITER, etc. More...

enum	FillRule
	Fill rule constants: FILL_EVENODD, FILL_NONZERO. More...

enum	Arrowhead
	Arrowhead style constants: ARROW_NONE, ARROW_SIMPLE, etc. More...

enum	Interpolation
	Image interpolation mode constants: INTERPOLATION_NONE, INTERPOLATION_FAST, etc. More...

enum	Anchor
	Anchoring mode constants: ANCHOR_CENTER, ANCHOR_N, etc. More...

enum	Alignment
	Text alignment mode constants: ALIGN_LEFT, ALIGN_RIGHT, ALIGN_CENTER. More...

enum

Static Public Member Functions inherited from cFigure
static Point	parsePoint (const char *s)

static Rectangle	parseRectangle (const char *s)

static Transform	parseTransform (const char *s)

static Font	parseFont (const char *s)

static Color	parseColor (const char *s)

static bool	parseBool (const char *s)

static LineStyle	parseLineStyle (const char *s)

static CapStyle	parseCapStyle (const char *s)

static JoinStyle	parseJoinStyle (const char *s)

static FillRule	parseFillRule (const char *s)

static Arrowhead	parseArrowhead (const char *s)

static Interpolation	parseInterpolation (const char *s)

static Anchor	parseAnchor (const char *s)

static Alignment	parseAlignment (const char *s)

Static Public Member Functions inherited from cOwnedObject
static long	getTotalObjectCount ()

static long	getLiveObjectCount ()

static void	resetObjectCounters ()

static cSoftOwner *	getOwningContext ()

Static Public Attributes inherited from cFigure
static const Color	BLACK

static const Color	WHITE

static const Color	GREY

static const Color	RED

static const Color	GREEN

static const Color	BLUE

static const Color	YELLOW

static const Color	CYAN

static const Color	MAGENTA

static const int	NUM_GOOD_DARK_COLORS

static const int	NUM_GOOD_LIGHT_COLORS

static const Color	GOOD_DARK_COLORS [14]

static const Color	GOOD_LIGHT_COLORS [10]

Static Protected Member Functions inherited from cFigure
static Point	parsePoint (cProperty property, const char key, int index)

static std::vector< Point >	parsePoints (cProperty property, const char key)

static Rectangle	parseBounds (cProperty *property, const Rectangle &defaults)

static Transform	parseTransform (cProperty property, const char key)

static Font	parseFont (cProperty property, const char key)

static Rectangle	computeBoundingBox (const Point &position, const Point &size, double ascent, Anchor anchor)

static void	concatArrays (const char dest, const char first, const char **second)

Member Function Documentation

◆ getAllowedPropertyKeys()

virtual const char** getAllowedPropertyKeys ( ) const

overrideprotectedvirtual

Returns the list of allowed keys in @figure properties with this figure type, in a nullptr-terminated array of const char* elements. This method is invoked e.g. from parse(), in order to be able to issue error messages for invalid keys in the property. Note that property keys starting with "x-" are already allowed by default. Custom figure classes usually need to override this method together with parse(); see the source code of the library classes for example implementations.

Reimplemented from cFigure.

Reimplemented in cLabelFigure.

◆ dup()

virtual cAbstractTextFigure* dup ( ) const

inlineoverridevirtual

Clones the figure, ignoring its child figures. (The copy will have no children.) To clone a figure together with its figure subtree, use dupTree().

Reimplemented from cFigure.

Reimplemented in cLabelFigure, and cTextFigure.

◆ str()

virtual std::string str ( ) const

overridevirtual

Returns a one-line string with the most characteristic data of the figure.

Reimplemented from cFigure.

◆ parse()

virtual void parse ( cProperty * property )

overridevirtual

This method is invoked by the simulation library to initialize the figure from a @figure NED property. Custom figure classes usually need to override this method (and call the super class' similar method in it).

Note: When overriding parse(), it is usually also necessary to override getAllowedPropertyKeys(), in order to allow new keys in the @figure property.

Reimplemented from cFigure.

Reimplemented in cLabelFigure.

◆ moveLocal()

virtual void moveLocal	(	double	dx,
		double	dy
	)

overridevirtual

Updates the position of the text, see getPosition().

Implements cFigure.

◆ getPosition()

virtual const Point& getPosition ( ) const

inlinevirtual

Returns the position of the text. The position and the anchoring mode jointly determine the placement of the text item; see the class description for details.

◆ setPosition()

virtual void setPosition ( const Point & position )

virtual

Sets the position of the text. The position and the anchoring mode jointly determine the placement of the text item; see the class description for details.

◆ getAnchor()

virtual Anchor getAnchor ( ) const

inlinevirtual

Returns the anchoring mode of the text. The position and the anchoring mode jointly determine the placement of the text item; see the class description for details.

◆ setAnchor()

virtual void setAnchor ( Anchor anchor )

virtual

Sets the anchoring mode of the text. The position and the anchoring mode jointly determine the placement of the text item; see the class description for details.

◆ getAlignment()

virtual Alignment getAlignment ( ) const

inlinevirtual

Returns the alignment mode of the text. This only has an effect on figures with multi-line text. Each line will be aligned within the figure bounding box according to this option. This does not affect the anchor points on the baseline; see the class description for details.

◆ setAlignment()

virtual void setAlignment ( Alignment alignment )

virtual

Sets the alignment mode of the text. This only has an effect on figures with multi-line text. Each line will be aligned within the figure bounding box according to this option. This does not affect the anchor points on the baseline; see the class description for details.

◆ getBounds()

virtual Rectangle getBounds ( ) const

virtual

Returns the bounding box of the text figure.

Caveat: Note that the figure itself only has a position and an anchor available for computing the bounding box, size (and for some cases ascent height) need to be supplied by the user interface of the simulation (cEnvir). The result depends on the details of font rendering and other factors, so the returned numbers and their accuracy may vary across user interfaces, operating systems or even installations. Cmdenv and other non-GUI environments may return completely made-up (but not entirely unrealistic) numbers.

See also: cEnvir::getTextExtent()

◆ getColor()

virtual const Color& getColor ( ) const

inlinevirtual

Returns the text color.

◆ setColor()

virtual void setColor ( const Color & color )

virtual

Sets the text color. The default color is black.

◆ getOpacity()

virtual double getOpacity ( ) const

inlinevirtual

Returns the opacity of the figure, a number in the [0,1] interval.

◆ setOpacity()

virtual void setOpacity ( double opacity )

virtual

Sets the line opacity of the figure. The argument must be a number in the [0,1] interval. The default opacity is 1.0.

◆ getHalo()

virtual bool getHalo ( ) const

inlinevirtual

Returns true if a "halo" is displayed around the text.

◆ setHalo()

virtual void setHalo ( bool enabled )

virtual

Sets the flag that controls whether a partially transparent "halo" should be displayed around the text. The halo improves the readability of the text when it is displayed over a background that has similar color as the text, or when it overlaps with other text items. The default setting is false (no halo).

Note: in Qtenv, halo may be slow to render for text figures (cTextFigure) under some circumstances. There is no such penalty for label figures (cLabelFigure).

◆ getFont()

virtual const Font& getFont ( ) const

inlinevirtual

Returns the font used for the figure.

◆ setFont()

virtual void setFont ( Font font )

virtual

Sets the font to be used for the figure. The default font has no specific typeface or size set, allowing the UI to use its preferred font.

◆ getText()

virtual const char* getText ( ) const

inlinevirtual

Returns the text to be displayed.

◆ setText()

virtual void setText ( const char * text )

virtual

Sets the text to be displayed. The text may contain newline and tab characters ("\n", "\t") for formatting.

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

ccanvas.h

Description

Public Member Functions

Protected Member Functions

Additional Inherited Members

Member Function Documentation

◆ getAllowedPropertyKeys()

◆ dup()

◆ str()

◆ parse()

◆ moveLocal()

◆ getPosition()

◆ setPosition()

◆ getAnchor()

◆ setAnchor()

◆ getAlignment()

◆ setAlignment()

◆ getBounds()

◆ getColor()

◆ setColor()

◆ getOpacity()

◆ setOpacity()

◆ getHalo()

◆ setHalo()

◆ getFont()

◆ setFont()

◆ getText()

◆ setText()