org.mov.chart.graph
Class MomentumGraph

java.lang.Object
  org.mov.chart.graph.AbstractGraph
      org.mov.chart.graph.MomentumGraph

All Implemented Interfaces:

Graph

public class MomentumGraph
extends AbstractGraph

Momentum graph. This graph is used to show the direction that the stock price is moving. The momentum for a given day is calculated as the day close of today minus the day close of period days ago.

Author:

Andrew Leppard

See Also:

PeriodGraphUI

Field Summary

Fields inherited from interface org.mov.chart.graph.Graph

TOOL_TIP_BUFFER

Constructor Summary

MomentumGraph(GraphSource source)
Create a new momentum graph.

Method Summary

static Graphable	createMomentum(Graphable source, int period) Create a momentum graphable.
double[]	getAcceptableMajorDeltas() Return an array of acceptable major deltas for the vertical axis.
double[]	getAcceptableMinorDeltas() Return an array of acceptable minor deltas for the vertical axis.
double	getHighestY(java.util.List x) Return the highest Y value in the given X range.
double	getLowestY(java.util.List x) Return the loweset Y value in the given X range.
java.lang.String	getName() Return the name of this graph.
java.lang.String	getToolTipText(java.lang.Comparable x, int y, int yoffset, double verticalScale, double bottomLineValue) Get the tool tip text for the given X value and y coordinate.
GraphUI	getUI(java.util.HashMap settings) Return the graph's user interface.
java.lang.String	getYLabel(double value) Convert the Y value to a label to be displayed in the vertical axis.
boolean	isPrimary() Return whether the graph is a primary graph.
void	render(java.awt.Graphics g, java.awt.Color colour, int xoffset, int yoffset, double horizontalScale, double verticalScale, double bottomLineValue, java.util.List xRange) Draw the graph.
void	setSettings(java.util.HashMap settings) Set the graph's user definable settings.

Methods inherited from class org.mov.chart.graph.AbstractGraph

getEndX, getSettings, getSource, getSourceName, getStartX, getXRange, getY

Methods inherited from class java.lang.Object

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

Constructor Detail

MomentumGraph

public MomentumGraph(GraphSource source)

Create a new momentum graph.

Parameters:

source - the source to create a momentum graph from

Method Detail

render

public void render(java.awt.Graphics g,
                   java.awt.Color colour,
                   int xoffset,
                   int yoffset,
                   double horizontalScale,
                   double verticalScale,
                   double bottomLineValue,
                   java.util.List xRange)

Description copied from interface: Graph

Draw the graph.

Parameters:

g - the Graphics object to render to

colour - the colour the graph should be rendered in; override this if the graph should be drawn in a certain colour - such as a Moving Average graph

xoffset - the x offset in the graphics object where the graph starts

yoffset - the y offset in the graphics object where the graph starts

horizontalScale - horizontal scale factor; use this to convert between X value in the xRange to a cartesian coordinate x

verticalScale - vertical scale factor; use this to convert between Y value to a cartesian coordinate y

bottomLineValue - the Y value of the lowest line in the graph

xRange - a List of Comparable that contain the X values to plot

getToolTipText

public java.lang.String getToolTipText(java.lang.Comparable x,
                                       int y,
                                       int yoffset,
                                       double verticalScale,
                                       double bottomLineValue)

Description copied from class: AbstractGraph

Get the tool tip text for the given X value and y coordinate.

Specified by:

getToolTipText in interface Graph

Overrides:

getToolTipText in class AbstractGraph

Parameters:

x - the X value

y - the y coordinate

yoffset - y offset from top of graph

verticalScale - vertical scale factor

bottomLineValue - the Y value of the lowest line in the graph

Returns:

the tool tip text for the default GraphSource

getHighestY

public double getHighestY(java.util.List x)

Description copied from class: AbstractGraph

Return the highest Y value in the given X range.

Specified by:

getHighestY in interface Graph

Overrides:

getHighestY in class AbstractGraph

Parameters:

x - range of X values

Returns:

the highest Y value of the default GraphSource

getLowestY

public double getLowestY(java.util.List x)

Description copied from class: AbstractGraph

Return the loweset Y value in the given X range.

Specified by:

getLowestY in interface Graph

Overrides:

getLowestY in class AbstractGraph

Parameters:

x - range of X values

Returns:

the lowest Y value of the default GraphSource

getAcceptableMajorDeltas

public double[] getAcceptableMajorDeltas()

Description copied from class: AbstractGraph

Return an array of acceptable major deltas for the vertical axis.

Specified by:

getAcceptableMajorDeltas in interface Graph

Overrides:

getAcceptableMajorDeltas in class AbstractGraph

Returns:

an array of doubles representing the minor deltas of the default GraphSource

getAcceptableMinorDeltas

public double[] getAcceptableMinorDeltas()

Description copied from class: AbstractGraph

Return an array of acceptable minor deltas for the vertical axis.

Specified by:

getAcceptableMinorDeltas in interface Graph

Overrides:

getAcceptableMinorDeltas in class AbstractGraph

Returns:

an array of doubles representing the minor deltas of the default GraphSource

See Also:

Graph.getAcceptableMajorDeltas()

getYLabel

public java.lang.String getYLabel(double value)

Description copied from class: AbstractGraph

Convert the Y value to a label to be displayed in the vertical axis.

Specified by:

getYLabel in interface Graph

Overrides:

getYLabel in class AbstractGraph

Parameters:

value - y value

Returns:

the Y label text that the default GraphSource would display

createMomentum

public static Graphable createMomentum(Graphable source,
                                       int period)

Create a momentum graphable.

Parameters:

source - the input graph source

period - the desired period of the momentum graph

Returns:

the graphable containing averaged data from the source

getName

public java.lang.String getName()

Return the name of this graph.

Returns:

Momentum

isPrimary

public boolean isPrimary()

Description copied from interface: Graph

Return whether the graph is a primary graph. Primary graphs will appear together in the top chart. Secondary graphs appear in their own charts which are added below. The day close graph is primary; while the day close graph is secondary.

Returns:

true if the graph is a primary graph

setSettings

public void setSettings(java.util.HashMap settings)

Description copied from class: AbstractGraph

Set the graph's user definable settings.

Specified by:

setSettings in interface Graph

Overrides:

setSettings in class AbstractGraph

Parameters:

settings - the new settings

getUI

public GraphUI getUI(java.util.HashMap settings)

Return the graph's user interface.

Specified by:

getUI in interface Graph

Overrides:

getUI in class AbstractGraph

Parameters:

settings - the initial settings

Returns:

user interface