org.rrd4j.graph

Class ConstantLine

java.lang.Object

org.rrd4j.graph.PlotElement

org.rrd4j.graph.SourcedPlotElement

org.rrd4j.graph.Line

org.rrd4j.graph.ConstantLine

public class ConstantLine
extends Line

Represents a line plot element with a constant value in RRD graphs. Extends Line to provide horizontal lines with fixed values across all data points. Useful for showing reference lines, thresholds, or target values.

Field Summary

Fields inherited from class org.rrd4j.graph.Line

stroke

Fields inherited from class org.rrd4j.graph.SourcedPlotElement

parent, srcName, values

Fields inherited from class org.rrd4j.graph.PlotElement

color

Constructor Summary

Constructors

Constructor and Description
ConstantLine(double value, Paint color, BasicStroke stroke, SourcedPlotElement parent) Creates a constant line with the specified value, color, stroke, and parent.

Method Summary

Modifier and Type	Method and Description
(package private) void	assignValues(DataProcessor dproc) Assigns constant values to all data points, optionally stacking with parent values.

Methods inherited from class org.rrd4j.graph.SourcedPlotElement

getMaxValue, getMinValue, getParentColor, getValues, stackValues

Methods inherited from class java.lang.Object

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

Constructor Detail

ConstantLine

ConstantLine(double value,
             Paint color,
             BasicStroke stroke,
             SourcedPlotElement parent)

Creates a constant line with the specified value, color, stroke, and parent.

Parameters:

value - the constant value for all data points

color - the line color

stroke - the line stroke style

parent - the parent plot element for stacking

Method Detail

assignValues

void assignValues(DataProcessor dproc)

Assigns constant values to all data points, optionally stacking with parent values.

Overrides:

assignValues in class SourcedPlotElement

Parameters:

dproc - the data processor for value assignment