Implementation of a rectangle. More...

#include <DSRectangle.h>

Inheritance diagram for casa::DSRectangle:

Public Member Functions
	DSRectangle ()
	Constructors and Destructors.
	DSRectangle (const Float &xPos, const Float &yPos, const Float &width, const Float &height, const Bool &handles=False, const Bool &drawHandles=False)
	DSRectangle (const DSRectangle &other)
virtual	~DSRectangle ()
virtual void	move (const Float &dX, const Float &dY)
	Standard DisplayShape functions.
virtual void	rotate (const Float &angle)
	Rotate the shape about its center by a set angle (angle in degrees).
virtual void	rotateAbout (const Float &angle, const Float &aboutX, const Float &aboutY)
virtual void	setCenter (const Float &xPos, const Float &yPos)
	Sets the center of the DisplayShape.
virtual void	changePoint (const Vector< Float > &pos)
	Changes the closest point to the supplied location to that location.
virtual void	changePoint (const Vector< Float > &newPoints, const Int whichOne)
	Changes the nth point making up the DisplayShape ot the specified location.
virtual void	addPoint (const Vector< Float > &toAdd)
	Polygon specific functions, add, delete and set points, all in pixels.
virtual void	setHeight (const Float &height)
	Rectangle specific.
virtual void	setWidth (const Float &width)
virtual Float	getHeight ()
virtual Float	getWidth ()
virtual Bool	setOptions (const Record &settings)
	Get and set options.
virtual Record	getOptions ()
	Get and set options.
virtual Matrix< Float >	makeAsPoly (const Float &xPos, const Float &yPos, const Float &width, const Float &height)
	Using supplied parameters, make a polygon of four points representing the rectangle.
Protected Member Functions
virtual Float	getAngle ()
Private Member Functions
virtual void	setDefaultOptions ()

virtual void	setAngle (const Float &newAngle)
Private Attributes
Float	itsAngle
	Always valid.
Bool	itsValid
Float	itsCenter
	Ony used during the set-up period.
Float	itsWidth
Float	itsHeight

Detailed Description

Implementation of a rectangle.

Prerequisite

Etymology

DSRectangle is a method of managing the drawing of a rectangle onto a PixelCanvas.

Synopsis

DSRectangle is simply a DSPoly with only four points. It has overloaded certain functions however, which cause it to behave as a rectangle when having its points moved etc. It calculates its width and height from points returned from DSPoly when needed.

There are generally two ways to make DisplayShape(s); To create them in "one hit" by providing arguments to the constructor, or by using the default constructor and then the "setOptions" method. A simple interface for all classes inheriting from the DisplayShape class is provided by DisplayShapeInterface .

Motivation

The need to draw rectangles on screen.

Example

To Do

Modify functions like 'changePoint' to allow a special case when angle = 0 for speed reasons.

Definition at line 80 of file DSRectangle.h.

Constructor & Destructor Documentation

casa::DSRectangle::DSRectangle ( )

Constructors and Destructors.

casa::DSRectangle::DSRectangle	(	const Float &	xPos,
		const Float &	yPos,
		const Float &	width,
		const Float &	height,
		const Bool &	handles = `False`,
		const Bool &	drawHandles = `False`
	)

casa::DSRectangle::DSRectangle ( const DSRectangle & other )

virtual casa::DSRectangle::~DSRectangle ( ) [virtual]

Member Function Documentation

virtual void casa::DSRectangle::addPoint ( const Vector< Float > & newPoint ) [virtual]

Polygon specific functions, add, delete and set points, all in pixels.

Add point decides the best place in the array to insert the new point. Similarly, deletePoints(const Vector<Float>& remove) deletes the point closest to that provided.

Reimplemented from casa::DSPoly.

virtual void casa::DSRectangle::changePoint ( const Vector< Float > & newPos ) [virtual]