Referencia de la Clase QCanvasLine

The QCanvasLine class provides a line on a QCanvas.canvasThe line inherits functionality from QCanvasPolygonalItem, for example the setPen() function. The start and end points of the line are set with setPoints(). Más...

#include <qcanvas.h>

Diagrama de herencias de QCanvasLine

Lista de todos los miembros.

Métodos públicos
	QCanvasLine (QCanvas *canvas)
	~QCanvasLine ()
void	setPoints (int x1, int y1, int x2, int y2)
QPoint	startPoint () const
QPoint	endPoint () const
int	rtti () const
void	setPen (QPen p)
void	moveBy (double dx, double dy)
	QCanvasLine (QCanvas *canvas)
	~QCanvasLine ()
void	setPoints (int x1, int y1, int x2, int y2)
QPoint	startPoint () const
QPoint	endPoint () const
int	rtti () const
void	setPen (QPen p)
void	moveBy (double dx, double dy)
Atributos públicos estáticos
static int	RTTI = Rtti_Line
Métodos protegidos
void	drawShape (QPainter &)
QPointArray	areaPoints () const
void	drawShape (QPainter &)
QPointArray	areaPoints () const

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Descripción detallada

The QCanvasLine class provides a line on a QCanvas.

canvas

The line inherits functionality from QCanvasPolygonalItem, for example the setPen() function. The start and end points of the line are set with setPoints().

Like any other canvas item lines can be moved with QCanvasItem::move() and QCanvasItem::moveBy(), or by setting coordinates with QCanvasItem::setX(), QCanvasItem::setY() and QCanvasItem::setZ().

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Documentación del constructor y destructor

QCanvasLine::QCanvasLine

(

QCanvas *

canvas

)

Constructs a line from (0,0) to (0,0) on canvas.

Ver también:

setPoints().

QCanvasLine::~QCanvasLine

(

)

Destroys the line.

QCanvasLine::QCanvasLine

(

QCanvas *

canvas

)

QCanvasLine::~QCanvasLine

(

)

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Documentación de las funciones miembro

QPointArray QCanvasLine::areaPoints

(

)

const [protected, virtual]

Note that the area defined by the line is somewhat thicker than the line that is actually drawn.

Implementa QCanvasPolygonalItem.

QPointArray QCanvasLine::areaPoints

(

)

const [protected, virtual]

This function must be reimplemented by subclasses. It must return the points bounding (i.e. outside and not touching) the shape or drawing errors will occur.

Implementa QCanvasPolygonalItem.

void QCanvasLine::drawShape

(

QPainter &

p

)

[protected, virtual]

Implementa QCanvasPolygonalItem.

void QCanvasLine::drawShape

(

QPainter &

p

)

[protected, virtual]

Subclasses must reimplement this function to draw their shape. The pen and brush of p are already set to pen() and brush() prior to calling this function.

Atención:

When you reimplement this function, make sure that you leave the painter in the same state as you found it. For example, if you start by calling QPainter::translate(50, 50), end your code by calling QPainter::translate(-50, -50). Be also aware that the painter might already have some transformations set (i.e., don't call QPainter::resetXForm() when you're done).

Ver también:

draw()

Implementa QCanvasPolygonalItem.

QPoint QCanvasLine::endPoint

(

)

const [inline]

QPoint QCanvasLine::endPoint

(

)

const [inline]

Returns the end point of the line.

Ver también:

setPoints(), startPoint()

void QCanvasLine::moveBy	(	double	dx,
		double	dy
	)		[virtual]

Reimplementado de QCanvasItem.

void QCanvasLine::moveBy	(	double	dx,
		double	dy
	)		[virtual]

Moves the canvas item relative to its current position by (dx, dy).

Reimplementado de QCanvasItem.

int QCanvasLine::rtti

(

)

const [virtual]

Returns 7 (QCanvasItem::Rtti_Line).

Ver también:

QCanvasItem::rtti()

Reimplementado de QCanvasPolygonalItem.

int QCanvasLine::rtti

(

)

const [virtual]

Returns 2 (QCanvasItem::Rtti_PolygonalItem).

Ver también:

QCanvasItem::rtti()

Reimplementado de QCanvasPolygonalItem.

void QCanvasLine::setPen

(

QPen

p

)

[virtual]

Reimplementado de QCanvasPolygonalItem.

void QCanvasLine::setPen

(

QPen

p

)

[virtual]

Sets the QPen used when drawing the item to the pen p. Note that many QCanvasPolygonalItems do not use the pen value.

Ver también:

setBrush(), pen(), drawShape()

Reimplementado de QCanvasPolygonalItem.

void QCanvasLine::setPoints	(	int	x1,
		int	y1,
		int	x2,
		int	y2
	)

void QCanvasLine::setPoints	(	int	xa,
		int	ya,
		int	xb,
		int	yb
	)

Sets the line's start point to (xa, ya) and its end point to (xb, yb).

QPoint QCanvasLine::startPoint

(

)

const [inline]

QPoint QCanvasLine::startPoint

(

)

const [inline]

Returns the start point of the line.

Ver también:

setPoints(), endPoint()

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Documentación de los datos miembro

static int QCanvasLine::RTTI = Rtti_Line [static]

Reimplementado de QCanvasPolygonalItem.

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La documentación para esta clase fue generada a partir de los siguientes ficheros:

• src/qt/include/qcanvas.h
• src/qt/src/canvas/qcanvas.h
• src/qt/src/canvas/qcanvas.cpp