Class graph.BuildGraph 
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Class graph.BuildGraph 

java.lang.Object
   |
   +----java.io.StreamTokenizer
           |
           +----graph.ScanWord
                   |
                   +----graph.BuildGraph
public class BuildGraph
extends ScanWord
This class will parse a description file and build a plot based on the instructions in the file. The build Graph class, with attached Axes and DataSets can be accessed though methods in the class
Version:
1.14, 1996/09/06 00:08:49
Author:
Leigh Brookshaw

Variable Index

o applet
The Calling Applet
o build
The BUILD stack.
o built
The class vector.
o debug
Debug.
o graph
The constructed Graph Object
o graphtitle
The TextLine containing the title
o level
The current brace level.
o lineno
Current line being parsed
o object
The Object stack.

Constructor Index

o BuildGraph(InputStream, Applet)
Instantiate the class

Method Index

o arrayFromFunction(ParseFunction, int, double, double)
o arrayFromFunction(ParseFunction, int, double, double, int, double, double)
o build(NamedObject)
Based on the parsed object build something.
o buildAxis()
o buildContour(NamedObject)
o buildData(int)
o buildFont()
o buildGraph(int)
Pop things off the object stack and build the graph
o buildGrid()
o buildLabel()
o buildMarker()
o buildTitle()
o buildZero()
o getBuilt()
Get a vector of all the built Classes.
o getGraph()
Get the Graph object that has been built!
o getGraphTitle()
Get the title of the Graph
o isContext(int)
Check if the object is on the "to be built" stack.
o parse()
This is THE method that parses the input file and constructs the plot.

Variables

o build 
  protected Stack build
The BUILD stack. Everything pushed on this stack has to be built from other objects. An example would be a Font, which is constructed from Logical name, style and size.
o object 
  protected Stack object
The Object stack. All input tokens get pushed onto and popped off this stack.
o built 
  protected Vector built
The class vector. This contains final class objects that cannot be deleted. That is we don't want these classes unnattached and collected into the garbage. The obvious classes here are the main Graph2D class, the Axes of the plot DataSets etc.
o graph 
  protected Object graph
The constructed Graph Object
o graphtitle 
  protected TextLine graphtitle
The TextLine containing the title
o applet 
  protected Applet applet
The Calling Applet
o debug 
  protected boolean debug
Debug. If true output copious debug messages. Though unless you know what is going on with the code most messages will probably be meaningless
o lineno 
  public int lineno
Current line being parsed
o level 
  public int level
The current brace level. At the end of the input if all braces are matched the level should be back to zero.

Constructors

o BuildGraph 
  public BuildGraph(InputStream in,
                    Applet ap)
Instantiate the class
Parameters:
in - The inputstream to be read
ap - the driving applet.

Methods

o getGraph 
  public Object getGraph()
Get the Graph object that has been built!
o getGraphTitle 
  public TextLine getGraphTitle()
Get the title of the Graph
o getBuilt 
  public Vector getBuilt()
Get a vector of all the built Classes. Ie the DataSets, Axis, Graph etc. This can be used by an applet to override anything specified in the input file
o parse 
  public void parse()
This is THE method that parses the input file and constructs the plot.
o isContext 
  protected boolean isContext(int token)
Check if the object is on the "to be built" stack. This way context can be checked so potential errors flagged.
Parameters:
token - is this the object we are currently building?
Returns:
true if the token matches current object being built
o build 
  protected boolean build(NamedObject nobj)
Based on the parsed object build something.
Parameters:
nobj - The object to be built
Returns:
true if the build was successful.
o buildGraph 
  protected boolean buildGraph(int type)
Pop things off the object stack and build the graph
Parameters:
type - Type of graph to build, Graph2D, G2Dint, Contour.
Returns:
true if the build was successful
o buildContour 
  protected boolean buildContour(NamedObject nobj)
Returns:
true if the build was successful
o buildFont 
  protected boolean buildFont()
Returns:
true if the build was successful
o buildTitle 
  protected boolean buildTitle()
Returns:
true if the build was successful
o buildLabel 
  protected boolean buildLabel()
Returns:
true if the build was successful
o buildMarker 
  protected boolean buildMarker()
o buildData 
  protected boolean buildData(int type)
Returns:
true if the build was successful
o arrayFromFunction 
  protected double[] arrayFromFunction(ParseFunction f,
                                       int nx,
                                       double xmin,
                                       double xmax)
o arrayFromFunction 
  protected double[] arrayFromFunction(ParseFunction f,
                                       int nx,
                                       double xmin,
                                       double xmax,
                                       int ny,
                                       double ymin,
                                       double ymax)
o buildAxis 
  protected boolean buildAxis()
Returns:
true if the build was successful
o buildGrid 
  protected boolean buildGrid()
Returns:
true if the build was successful
o buildZero 
  protected boolean buildZero()
Returns:
true if the build was successful 
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