org.epics.graphene

Class MultilineGraph2DRenderer

java.lang.Object

org.epics.graphene.Graph2DRenderer

org.epics.graphene.MultilineGraph2DRenderer

public class MultilineGraph2DRenderer
extends Graph2DRenderer

Author:

asbarber, jkfeng, sjdallst

Field Summary

Fields

Modifier and Type	Field and Description
static List<InterpolationScheme>	supportedInterpolationScheme Supported interpolation schemes.
static List<ReductionScheme>	supportedReductionScheme Supported reduction schemes.

Fields inherited from class org.epics.graphene.Graph2DRenderer

backgroundColor, bottomAreaMargin, bottomMargin, g, labelColor, labelFont, labelFontMetrics, leftAreaMargin, leftMargin, referenceLineColor, rightAreaMargin, rightMargin, topAreaMargin, topMargin, xAreaCoordEnd, xAreaCoordStart, xLabelMargin, xPlotCoordEnd, xPlotCoordStart, xPlotCoordWidth, xPlotValueEnd, xPlotValueStart, xPointMargin, xReferenceCoords, xReferenceLabels, xReferenceValues, yAreaCoordEnd, yAreaCoordStart, yLabelMargin, yPlotCoordEnd, yPlotCoordHeight, yPlotCoordStart, yPlotValueEnd, yPlotValueStart, yPointMargin, yReferenceCoords, yReferenceLabels, yReferenceValues

Constructor Summary

Constructors

Constructor and Description
MultilineGraph2DRenderer(int imageWidth, int imageHeight) Uses constructor specified in super class (Graph2DRenderer)

Method Summary

Methods

Modifier and Type	Method and Description
void	draw(Graphics2D g, List<Point2DDataset> data) Draws a graph with multiple lines, each pertaining to a different set of data.
Graph2DRendererUpdate	newUpdate() Creates a new update for the given graph.
void	update(MultilineGraph2DRendererUpdate update) Updates private data by getting new values from update.

Methods inherited from class org.epics.graphene.Graph2DRenderer

calculateGraphArea, calculateLabels, calculateRanges, drawBackground, drawGraphArea, drawHorizontalReferenceLines, drawValueExplicitLine, drawValueLine, drawVerticalReferenceLines, drawXLabels, drawYLabels, getImageHeight, getImageWidth, getXAggregatedRange, getXAxisRange, getXPlotRange, getYAggregatedRange, getYAxisRange, getYPlotRange, processScaledValue, scaledX, scaledY, setClip, setupDataAsAreas, setupDataAsPoints, setupXAsAreas, setupXAsPoints, setupYAsAreas, setupYAsPoints, update

Methods inherited from class java.lang.Object

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

Field Detail

supportedInterpolationScheme

public static List<InterpolationScheme> supportedInterpolationScheme

Supported interpolation schemes. Possible values:

• NEAREST_NEIGHBOR: Draws a line in steps. Starts at an initial point, draws that point's value until it is halfway to the next point, draws a straight line upwards to the next point's value, then draws a straight line to the next point.
• LINEAR: Draws lines from one point to the next in a linear fashion.
• CUBIC: Fits a cubic curve to the points plotted.

supportedReductionScheme

public static List<ReductionScheme> supportedReductionScheme

Supported reduction schemes. Possible values:

• FIRST_MAX_MIN_LAST: plots only the first max min and last points within every four pixels along the x-axis. To be used when there are many more points than pixels.
• NONE: No reduction scheme, all points are plotted.

Constructor Detail

MultilineGraph2DRenderer

public MultilineGraph2DRenderer(int imageWidth,
                        int imageHeight)

Uses constructor specified in super class (Graph2DRenderer)

Parameters:

imageWidth - should be equal to the width of the bufferedImage.

imageHeight - should be equal to the height of the bufferedImage.

Method Detail

draw

public void draw(Graphics2D g,
        List<Point2DDataset> data)

Draws a graph with multiple lines, each pertaining to a different set of data.

Parameters:

g - Graphics2D object used to perform drawing functions within draw.

data - can not be null

update

public void update(MultilineGraph2DRendererUpdate update)

Updates private data by getting new values from update. Parameter not already taken care of by the super class: valueColorScheme

Parameters:

update -

newUpdate

public Graph2DRendererUpdate newUpdate()

Description copied from class: Graph2DRenderer

Creates a new update for the given graph.

Specified by:

newUpdate in class Graph2DRenderer

Returns:

a new update object