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graph
Class Markers  

java.lang.Object
  graph.Markers

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public class Markers

extends java.lang.Object

This class installs, manipulates and draws markers. Markers are stroked using the line drawing method of the class Graph. This means that any stroked figure can become a marker.

Version:

$Revision: 2.4 $, $Date: 2001/05/29 09:36:38 $

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Field Summary
protected  int	last           index of the last marker loaded
protected  int	max           maximum number of markers allowed
protected  java.util.Vector[]	vert           An array of vectors.

 

Constructor Summary

Markers()           The class contructor

Markers(java.net.URL file)           Instantiate the Marker class and load marker definitions from the parsed URL.

 

Method Summary
void	AddMarker(int n, boolean[] draw, int[] x, int[] y)           Add the definition of a new marker.
void	AddMarker(int m, int n, boolean[] draw, int[] x, int[] y)           Add the definition of a new marker.
void	ClearMarkers()           Clear All markers.
void	DeleteMarker(int n)           Delete the marker with the given index.
void	draw(java.awt.Graphics g, int m, double scale, int x, int y)           draw the marker
void	LoadMarkers(java.net.URL file)           This method reads the marker file and loads the marker definitions.

 

Methods inherited from class java.lang.Object

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

 

Field Detail

last

protected int last

index of the last marker loaded

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max

protected int max

maximum number of markers allowed

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vert

protected java.util.Vector[] vert

An array of vectors. Each element in the array contains the vertex vectors for a marker. Marker 1 is at element vert[0].

Constructor Detail

Markers

public Markers()

The class contructor

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Markers

public Markers(java.net.URL file)
        throws java.io.IOException

Instantiate the Marker class and load marker definitions from the parsed URL. The format of the file is easily worked out from the default marker file marker.txt.

Method Detail

AddMarker

public void AddMarker(int m,
                      int n,
                      boolean[] draw,
                      int[] x,
                      int[] y)

Add the definition of a new marker. The arrays contain the vertex points of the marker. The boolean array is used to define a relative draw or move to the vertex. The first vertex should always be a move (The boolean array is "true" for a relative draw.

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AddMarker

public void AddMarker(int n,
                      boolean[] draw,
                      int[] x,
                      int[] y)

Add the definition of a new marker. The new marker is appended onto the marker list. The center of the marker is assumed to be at (0,0).

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DeleteMarker

public void DeleteMarker(int n)

Delete the marker with the given index. the first marker has index 1.

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ClearMarkers

public void ClearMarkers()

Clear All markers.

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LoadMarkers

public void LoadMarkers(java.net.URL file)
                 throws java.io.IOException

This method reads the marker file and loads the marker definitions. The format of the file is simple. The following are the keywords.

start

starts a new marker definition.

end

ends a marker definition.

m x y

move to position x,y

l x y

line to position x,y

All line drawing is relative to the previous position. The center of the marker is assumed to be at (0,0). As always blank lines are ignored and comments begin with a # character.

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draw

public void draw(java.awt.Graphics g,
                 int m,
                 double scale,
                 int x,
                 int y)

draw the marker

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