com.sencha.gxt.chart.client.draw.path
Class PathCommand

java.lang.Object
  com.sencha.gxt.chart.client.draw.path.PathCommand

Direct Known Subclasses:

ClosePath, EndPointCommand, LineToHorizontal, LineToVertical

public abstract class PathCommand
extends Object

A command that represents a segment of a path.

Constructor Summary

PathCommand()
Creates a path command.

PathCommand(boolean relative)
Creates a path command.

PathCommand(PathCommand command)
Creates a copy of the given command.

Method Summary

abstract PathCommand	copy() Returns a copy of the path command.
boolean	isRelative() Returns true if the command is relative.
abstract boolean	nearEqual(PathCommand command) Determines equality of two commands using rounded values.
void	setRelative(boolean relative) Sets the command to relative or absolute
void	toAbsolute(PrecisePoint currentPoint, PrecisePoint movePoint) Converts the path commands to absolute coordinates using the given frame of reference and the last move.
abstract PathCommand	toCurve(PrecisePoint currentPoint, PrecisePoint movePoint, PrecisePoint curvePoint, PrecisePoint quadraticPoint) Converts the PathCommand to a CurveTo command.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PathCommand

public PathCommand()

Creates a path command. Defaults to absolute.

PathCommand

public PathCommand(boolean relative)

Creates a path command.

Parameters:

relative - true if the command is relative

PathCommand

public PathCommand(PathCommand command)

Creates a copy of the given command.

Parameters:

command - the command to be copied

Method Detail

copy

public abstract PathCommand copy()

Returns a copy of the path command.

Returns:

a copy of the path command

isRelative

public boolean isRelative()

Returns true if the command is relative.

Returns:

true if the command is relative

nearEqual

public abstract boolean nearEqual(PathCommand command)

Determines equality of two commands using rounded values.

Parameters:

command - the command to compare

Returns:

true if equal and false otherwise

setRelative

public void setRelative(boolean relative)

Sets the command to relative or absolute

Parameters:

relative - true if relative

toAbsolute

public void toAbsolute(PrecisePoint currentPoint,
                       PrecisePoint movePoint)

Converts the path commands to absolute coordinates using the given frame of reference and the last move.

Parameters:

currentPoint - frame of reference

movePoint - last move point

toCurve

public abstract PathCommand toCurve(PrecisePoint currentPoint,
                                    PrecisePoint movePoint,
                                    PrecisePoint curvePoint,
                                    PrecisePoint quadraticPoint)

Converts the PathCommand to a CurveTo command. If a MoveTo no conversion takes place, but the current move point is updated.

Parameters:

currentPoint - the current point of the path

movePoint - the frame of reference for the path

curvePoint - the frame of reference for the Bézier

quadraticPoint - the beginning of the last quadratic curve

Returns:

the converted command