Implementation of a line. More...

#include <DSLine.h>

Inheritance diagram for casa::DSLine:

Public Member Functions
	DSLine ()
	Constructors and Destructors.
	DSLine (const DSLine &other)
	DSLine (const Vector< Float > &startPos, const Vector< Float > &endPos, const Bool &handles=True, const Bool &drawHandles=True)
virtual	~DSLine ()
virtual void	setCenter (const Float &xPos, const Float &yPos)
	This does nothing, it's so arrow and other inheriting classes can take note of new centers.
virtual Bool	isValid ()
	Does this line have a valid start and a valid end?
virtual void	setStartPoint (const Vector< Float > &start)
	Line specific functions for ease of use.
virtual void	setEndPoint (const Vector< Float > &end)
virtual Record	getOptions ()
	Set and get options.
virtual Bool	setOptions (const Record &newSettings)
	Get and set this shapes options.
Protected Member Functions
virtual Bool	validStart ()
virtual Bool	validEnd ()
virtual void	make ()
virtual Matrix< Float >	getEnds ()
	General utility functions.
virtual Matrix< Float >	asPolyLine (const Vector< Float > &startPos, const Vector< Float > &endPos)
Private Attributes
Bool	itsValidStart

Bool	itsValidEnd
Vector< Float >	itsStart
	These are to hold the points while line is being made (line is invalid).
Vector< Float >	itsEnd

Detailed Description

Implementation of a line.

Prerequisite

Etymology

DSLine is a method of managing the drawing of a line onto a PixelCanvas.

Synopsis

DSLine simply extends from DSPolyLine, and adds specific functions to a line with only two points (e.g. setStartPoint)

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 for a basic line drawing tool.

Example

    Vector<Float> startPoint(2); startPoint[0] = 100; startPoint[1] = 100;
    Vector<Float> endPoint(2);   endPoint[0] = 200;   endPoint[1] = 200;
   
    DSLine* myLine = new DSLine(startPoint, endPoint, True, True);
   
    myLine->move(10,10);
   
    Vector<Float> newStart(2); newStart[0] = 50; newStart[1] = 50;
    myLine->setStartPoint(newStart);
   
    Record newLineOpt;
    newLineOpt.define("linewidth", 3);
   
    myLine->setOptions(newLineOpt);
    myLine->draw(myPixelCanvas);
    etc.\.

Definition at line 90 of file DSLine.h.

Constructor & Destructor Documentation

casa::DSLine::DSLine ( )

Constructors and Destructors.

casa::DSLine::DSLine ( const DSLine & other )

casa::DSLine::DSLine	(	const Vector< Float > &	startPos,
		const Vector< Float > &	endPos,
		const Bool &	handles = `True`,
		const Bool &	drawHandles = `True`
	)