Qwt3D::Label Class Reference

A Qt string or an output device dependent string. More...

#include <qwt3d_label.h>

Inheritance diagram for Qwt3D::Label:

Classes
class	PrivateData

Public Member Functions
	Label (const Label &other)
	Default constructor.
	Label (Label &&other) noexcept
Label &	operator= (const Label &other)
	Copy assignment operator.
Label &	operator= (Label &&other) noexcept
	Move assignment operator.
	Label (const QString &family, int pointSize, int weight=QFont::Normal, bool italic=false)
void	setFont (QString const &family, int pointSize, int weight=QFont::Normal, bool italic=false)
	Sets the label font.
void	adjust (int gap)
	Adds an additional shift to the anchor point.
double	gap () const
void	setPosition (Qwt3D::Triple pos, ANCHOR a=BottomLeft)
	Sets the label position and anchor point.
void	setRelPosition (Tuple rpos, ANCHOR a)
	Sets the label position relative to the viewport.
Qwt3D::Triple	first () const
Qwt3D::Triple	second () const
ANCHOR	anchor () const
virtual void	setColor (double r, double g, double b, double a=1) override
	Sets the label color from RGBA components.
virtual void	setColor (Qwt3D::RGBA rgba) override
	Sets the label color from an RGBA object.
void	setString (QString const &s)
	Sets the label text string.
virtual void	draw () override
	Draws the label.
Public Member Functions inherited from Qwt3D::Drawable
virtual void	saveGLState ()
virtual void	restoreGLState ()
void	attach (Drawable *)
void	detach (Drawable *)
void	detachAll ()
Qwt3D::Triple	relativePosition (Qwt3D::Triple rel)
	Calculates world coordinates from relative viewport position.

Static Public Member Functions
static void	useDeviceFonts (bool val)
	Enables or disables device font rendering for all labels.

Additional Inherited Members
Protected Member Functions inherited from Qwt3D::Drawable
void	Enable (GLenum what, GLboolean val)
Qwt3D::Triple	ViewPort2World (Qwt3D::Triple win, bool *err=nullptr)
	Converts viewport coordinates to world coordinates (glUnProject)
Qwt3D::Triple	World2ViewPort (Qwt3D::Triple obj, bool *err=nullptr)
	Converts world coordinates to viewport coordinates (glProject)
	Drawable (Drawable &&other) noexcept
Drawable &	operator= (Drawable &&other) noexcept
Protected Attributes inherited from Qwt3D::Drawable
Qwt3D::RGBA	color
GLdouble	modelMatrix [16]
GLdouble	projMatrix [16]
GLint	viewport [4]

Detailed Description

A Qt string or an output device dependent string.

Label provides text rendering on 3D plots, supporting both Qt string representation and device-dependent string output.

Constructor & Destructor Documentation

Label()

Label::Label

(

const Label &

other

)

Default constructor.

Constructs a Label with specified font parameters

Parameters

family	Font family name
pointSize	Font point size
weight	Font weight
italic	Whether font is italic

Destructor

Copy constructor

Move constructor

Member Function Documentation

adjust()

void Label::adjust

(

int

gap

)

Adds an additional shift to the anchor point.

Parameters

gap	Gap value in pixels

The shift direction depends on the anchor type: left aligned -->, right aligned <–, top aligned top-down, bottom aligned bottom-up. The unit is user space dependent (one pixel on screen - play around to get satisfying results).

draw()

void Label::draw ( )

overridevirtual

Draws the label.

Reimplemented from Qwt3D::Drawable.

setColor() [1/2]

void Label::setColor ( double  r, double  g, double  b, double  a = 1  )

overridevirtual

Sets the label color from RGBA components.

Parameters

r	Red component
g	Green component
b	Blue component
a	Alpha component

Reimplemented from Qwt3D::Drawable.

setColor() [2/2]

void Label::setColor ( Qwt3D::RGBA  rgba )

overridevirtual

Sets the label color from an RGBA object.

Parameters

rgba	RGBA color value

Reimplemented from Qwt3D::Drawable.

setFont()

void Label::setFont	(	QString const &	family,
		int	pointSize,
		int	weight = QFont::Normal,
		bool	italic = false
	)

Sets the label font.

Parameters

family	Font family name
pointSize	Font point size
weight	Font weight
italic	Whether font is italic

setPosition()

void Label::setPosition	(	Qwt3D::Triple	pos,
		ANCHOR	a = BottomLeft
	)

Sets the label position and anchor point.

Parameters

pos	Position triple in world coordinates
a	Anchor type defining how the label aligns relative to pos

Anchor example: TopCenter (*) resp. BottomRight (X): +-—*-—+ | Pixmap | +------—X

setRelPosition()

void Label::setRelPosition	(	Tuple	rpos,
		ANCHOR	a
	)

Sets the label position relative to the viewport.

Parameters

rpos	Relative position tuple (x,y)
a	Anchor type defining how the label aligns

setString()

void Label::setString

(

QString const &

s

)

Sets the label text string.

Parameters

s	Text string to display

useDeviceFonts()

void Label::useDeviceFonts ( bool  val )

static

Enables or disables device font rendering for all labels.

Parameters

val	True to use device fonts, false to use Qt-based rendering

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

• /home/runner/work/QWT/QWT/src/plot3d/qwt3d_label.h
• /home/runner/work/QWT/QWT/src/plot3d/qwt3d_label.cpp