Class Kali

java.lang.Object
   |
   +----java.awt.Component
           |
           +----java.awt.Container
                   |
                   +----java.awt.Panel
                           |
                           +----java.applet.Applet
                                   |
                                   +----Kali

public class Kali

extends Applet

It generally works as follows:

• Create a KaliCanvas object; this is the object which manages the various coordinate systems that Kali uses.
• Create a Panorama object, and connect the KaliCanvas to it. The Panorama object is where the math happens; it keeps track of the current group, and applies the group actions to draw individual line segments in the KaliCanvas.
• Create a DrawPanel object, and connect the Panorama and KaliCanvas objects to it. The DrawPanel object is the actual drawing area; it handles mouse events related to drawing, and maintains the list of segments to be drawn.
• Create a new ControlPanel object, and connect the Kali object (applet id), DrawPanel, and Panorama objects to it.
• Lay out the ControlPanel and DrawPanel in the window.

The other classes of interest are SymmetryGroup, which represents a group, and SymmetryGroups, which holds a list of all the groups that the program knows about.

See Also:

Panorama, DrawPanel, ControlPanel, KaliCanvas, SymmetryGroup, SymmetryGroups

Kali()

getImageNow(String)

Load an image immediately.

handleEvent(Event)

init()

Initialize the applet; this is where we create the objects that the applet uses, connect them up to each other, and lay out the window.

main(String[])

redraw()

  public Kali()

  public Image getImageNow(String imagePath)

Load an image immediately. Kali uses this to load an image containing its button bitmaps from the server. This method will not return until the image is finished loading (The Applet getImage() method always returns immediately, while the image loads in another thread. In our case, however, we want to wait until the image has finished loading before continuing, because the next thing we do is carve the image up into individual buttons. This all happens in the constructor for the ControlPanel object.)

  public void init()

Initialize the applet; this is where we create the objects that the applet uses, connect them up to each other, and lay out the window. See the introduction to the Kali class above for more details on what happens here.

Overrides:

init in class Applet

  public void redraw()

  public boolean handleEvent(Event e)

Overrides:

handleEvent in class Component

  public static void main(String args[])

The Geometry Center Home Page

Author: Mark Phillips
Comments to: webmaster@geom.umn.edu
Created: Sep 16 1996 --- Last modified: Sep 18 1996