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Class TracePlanePanel

Class TracePlanePanel 

java.lang.Object
   |
   +----java.awt.Component
           |
           +----java.awt.Canvas
                   |
                   +----Plane
                           |
                           +----TracePlanePanel
public class TracePlanePanel
extends Plane
A class which shows a piece of the complex plane for the graphical display and entry of traces.

Variable Index

o backgroundgraphics
The Graphics object for drawing the background image of the decomposed trace plane.
o backgroundimage
An image into which to store the decomposition of the current window on the trace plane.
o CX
The abstract x-coordinate of the left side of the trace plane display.
o CY
The abstract y-coordinate of the upper edge of the trace plane display.
o decomposed
Tells whether the trace plane has been decomposed since last window change.
o domaincolors
Array of colors for the pixels of the trace plane when it has been decomposed.
o inputpanel
A reference to the containing inputpanel.
o prev
The location of a mousedown in this plane, to compute the extent of a drag that may occur; in abstract coordinates.
o previ
The location of a mousedown in this plane, to compute the extent of a drag that may occur; in pixel coordinates.
o SX
The width, in abstract units, of the trace plane display.
o SY
The height, in abstract units, of the trace plane display.
o X
The width, in pixels, of the trace plane display.
o Y
The height, in pixels, of the trace plane display.

Constructor Index

o TracePlanePanel(InputPanel)
Constructor for TracePlanePanels.

Method Index

o decompose()
Computes a decomposition of the visible portion of the trace plane by the combinatorial type of the corresponding fundamental domain, building a color image from the decompostion which can then be used as the background of the trace plane display; then redraws the trace plane.
o mouseDown(Event, int, int)
Java 1.0 handling of mouseDown events.
o mouseDrag(Event, int, int)
Java 1.0 handling of mouseDrag events.
o paint(Graphics)
Paint the TracePlanePanel, either painting the simple plane or the background image of the decomposition, then putting a point at the currently selected trace and writing all the tickmarks.
o zoom(double)
Scales the size of the visible window onto the trace plane.

Variables

o inputpanel 
 public InputPanel inputpanel
A reference to the containing inputpanel.

See Also:
inputpanel
o prev 
 protected double prev[]
The location of a mousedown in this plane, to compute the extent of a drag that may occur; in abstract coordinates.

o previ 
 protected int previ[]
The location of a mousedown in this plane, to compute the extent of a drag that may occur; in pixel coordinates.

o decomposed 
 public boolean decomposed
Tells whether the trace plane has been decomposed since last window change.

o domaincolors 
 public Color domaincolors[][]
Array of colors for the pixels of the trace plane when it has been decomposed.

o CX 
 public static final double CX
The abstract x-coordinate of the left side of the trace plane display.

o CY 
 public static final double CY
The abstract y-coordinate of the upper edge of the trace plane display.

o SX 
 public static final double SX
The width, in abstract units, of the trace plane display.

o SY 
 public static final double SY
The height, in abstract units, of the trace plane display.

o X 
 public static final int X
The width, in pixels, of the trace plane display. Good defaults are:
    200
    for small screens,
    300
    for large screens (then use 875x450 in HTML), and
    500
    for screen-grabbing huge images (then use 1000x650 in HTML)

o Y 
 public static final int Y
The height, in pixels, of the trace plane display. Good defaults are:
    200
    for small screens,
    300
    for large screens (then use 875x450 in HTML), and
    500
    for screen-grabbing huge images (then use 1000x650 in HTML)

o backgroundimage 
 public Image backgroundimage
An image into which to store the decomposition of the current window on the trace plane.

o backgroundgraphics 
 public Graphics backgroundgraphics
The Graphics object for drawing the background image of the decomposed trace plane.

Constructors

o TracePlanePanel 
 public TracePlanePanel(InputPanel nptpnl)
Constructor for TracePlanePanels.

Parameters:
nptpnl - the ambient inputpanel

Methods

o mouseDown 
 public boolean mouseDown(Event e,
                          int x,
                          int y)
Java 1.0 handling of mouseDown events.

Parameters:
e - the event to be handled
x - the x-coordinate (in pixels) of the mouseDown
y - the y-coordinate (in pixels) of the mouseDown
Overrides:
mouseDown in class Component
o mouseDrag 
 public boolean mouseDrag(Event e,
                          int x,
                          int y)
Java 1.0 handling of mouseDrag events.

Parameters:
e - the event to be handled
x - the x-coordinate (in pixels) of the mouseDrag
y - the y-coordinate (in pixels) of the mouseDrag
Overrides:
mouseDrag in class Component
o paint 
 public void paint(Graphics g)
Paint the TracePlanePanel, either painting the simple plane or the background image of the decomposition, then putting a point at the currently selected trace and writing all the tickmarks.

Parameters:
g - the Graphics object upon which to paint the TracePlanePanel
Overrides:
paint in class Plane
o zoom 
 public void zoom(double factor)
Scales the size of the visible window onto the trace plane.

Parameters:
factor - the scaling factor, can be any positive number
o decompose 
 public void decompose()
Computes a decomposition of the visible portion of the trace plane by the combinatorial type of the corresponding fundamental domain, building a color image from the decompostion which can then be used as the background of the trace plane display; then redraws the trace plane.