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public abstract class Grapher

(source file: Grapher.java)

java.lang.Object
   |
   +----Grapher

The pure class interface.

public abstract class Grapher

A class of `places that graphs can be drawn'. This is implemented either using AWT calls to a graphics context, or with a PostScript back end (all this stuff predates AWT1.1 PrintGraphics contexts).


Author:: Alan Jeffrey
Version: v1.0 1998/06/11

Grapher()

black(): Set the colour to black.
blue(): Set the colour to blue.
close(): Close the output stream (if there is one).
drawArrow(int, int, int, int): Draw an arrow.
drawCircle(int, int): Draw a circle.
drawDot(int, int): Draw a dot.
drawLine(int, int, int, int): Draw a line.
drawRectangle(int, int, int, int): Draw a rectangle.
drawText(int, int, String): Draw some text.
drawUTurn(int, int, int, int): Draw a uturn
purple(): Set the colour to purple (well, magenta actually).
red(): Set the colour to red.
setColour(PremonCat): Set the appropriate colour for a given category (blue for val, purple for central, red for

Grapher

public Grapher();

drawLine

public abstract void drawLine(int llX,
                              int llY,
                              int urX,
                              int urY);

Draw a line.


Parameters:: llX - the lower left x coordinate.; llY - the lower left y coordinate.; urX - the upper right x coordinate.; urY - the upper right y coordinate.

drawArrow

public abstract void drawArrow(int llX,
                               int llY,
                               int urX,
                               int urY);

Draw an arrow.


Parameters:: llX - the lower left x coordinate.; llY - the lower left y coordinate.; urX - the upper right x coordinate.; urY - the upper right y coordinate.

drawRectangle

public abstract void drawRectangle(int llX,
                                   int llY,
                                   int urX,
                                   int urY);

Draw a rectangle.


Parameters:: llX - the lower left x coordinate.; llY - the lower left y coordinate.; urX - the upper right x coordinate.; urY - the upper right y coordinate.

drawText

public abstract void drawText(int x,
                              int y,
                              String text);

Draw some text.


Parameters:: x - the left-hand x coordinate.; y - the baseline y coordinate.; text - the text to draw.

drawCircle

public abstract void drawCircle(int x,
                                int y);

Draw a circle.


Parameters:: x - the centre x coordinate.; y - the centre y coordinate.

drawDot

public abstract void drawDot(int x,
                             int y);

Draw a dot.


Parameters:: x - the centre x coordinate.; y - the centre y coordinate.

drawUTurn

public abstract void drawUTurn(int bot,
                               int left,
                               int top,
                               int right);

Draw a uturn


Parameters:: bot - the lower y coordinate.; left - the left x coordinate.; top - the upper y coordinate.; right - the right x coordinate.

black

public abstract void black();

Set the colour to black.

blue

public abstract void blue();

Set the colour to blue.

purple

public abstract void purple();

Set the colour to purple (well, magenta actually).

red

public abstract void red();

Set the colour to red.

close

public abstract void close();

Close the output stream (if there is one).

setColour

public void setColour(PremonCat C);

Set the appropriate colour for a given category (blue for val, purple for central, red for proc).


Parameters:: C - the category.


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public abstract class Grapher

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