Class DisplayCanvas 

java.lang.Object
   |
   +----java.awt.Component
           |
           +----java.awt.Canvas
                   |
                   +----DisplayCanvas
public class DisplayCanvas
extends Canvas
Class definition for a canvas for drawing an IP/ATM network.

Version:
$Revision: 1.7 $, $Date: 2000/10/12 14:07:48 $
Author:
John Cavanaugh

Variable Index

o actualSize
The actual size of the display canvas.
o defaultCursor
The default cursor.
o definedSize
The size of the display canvas desired by the applet.
o frame
The parent frame.
o FRAME_MARGIN
o mode
The display mode.
o mouseListener
The active mouse listener.
o net
The IP/ATM network being displayed.
o NEW_AREA_MODE
o NORMAL_MODE
o SEL_SQ_SIZE
o view
The view settings that control the display.
o WAIT_MODE

Constructor Index

o DisplayCanvas(Dimension, VisiFrame, Network, ViewSettings)
Constructs a display canvas.

Method Index

o clearCanvas(Graphics)
Prepares the drawing area by clearing it to the background color.
o frameCanvas(Graphics)
Draws a frame around the display canvas.
o getBandwidthString(long)
Converts a bandwidth in cells per second to a string giving the bandwidth in Kbps or Mbps.
o getDisplaySize()
Gets the size to use when drawing on the canvas.
o getImage()
Gets an image of the display.
o getMode()
Gets the display mode
o getNetwork()
Gets the network being displayed.
o getTimeString(long)
Converts a time in hundredths of a second to a string giving days, hours, minutes, and seconds.
o getView()
Gets the view settings.
o paint(Graphics)
Paints the display canvas.
o rectInside(Rectangle, Rectangle)
Check whether one rectangle is inside another.
o setMode(int)
Sets the display mode.
o setSizes()
Gets the current size of the display canvas and sets the size attributes.
o setView(ViewSettings)
Sets the view settings.
o update(Graphics)
Updates the display.

Variables

o NORMAL_MODE 
 public static final int NORMAL_MODE
o WAIT_MODE 
 public static final int WAIT_MODE
o NEW_AREA_MODE 
 public static final int NEW_AREA_MODE
o SEL_SQ_SIZE 
 public static final int SEL_SQ_SIZE
o FRAME_MARGIN 
 public static final int FRAME_MARGIN
o actualSize 
 private Dimension actualSize
The actual size of the display canvas.

o definedSize 
 private Dimension definedSize
The size of the display canvas desired by the applet.

o net 
 private Network net
The IP/ATM network being displayed.

o view 
 private ViewSettings view
The view settings that control the display.

o mode 
 private int mode
The display mode.

o frame 
 private VisiFrame frame
The parent frame.

o mouseListener 
 private VisiMouseListener mouseListener
The active mouse listener.

o defaultCursor 
 public Cursor defaultCursor
The default cursor.

Constructors

o DisplayCanvas 
 public DisplayCanvas(Dimension definedSize,
                      VisiFrame frame,
                      Network net,
                      ViewSettings view)
Constructs a display canvas.

Parameters:
definedSize - the size for the display canvas.
frame - the parent frame.
net - the network to display.
view - the view settings.

Methods

o getNetwork 
 public Network getNetwork()
Gets the network being displayed.

Returns:
the network being displayed.
o getDisplaySize 
 public Dimension getDisplaySize()
Gets the size to use when drawing on the canvas.

Returns:
the size of the canvas.
o getView 
 public ViewSettings getView()
Gets the view settings.

Returns:
the view settings.
o setView 
 public void setView(ViewSettings view)
Sets the view settings.

Parameters:
view - the view settings.
o getMode 
 public int getMode()
Gets the display mode

Returns:
the display mode.
o setMode 
 public void setMode(int mode)
Sets the display mode.

Parameters:
mode - the new display mode.
o getImage 
 public Image getImage()
Gets an image of the display.

Returns:
an image of the display canvas.
o update 
 public void update(Graphics g)
Updates the display.

Parameters:
g - the graphics context for the display.
Overrides:
update in class Component
o paint 
 public void paint(Graphics g)
Paints the display canvas.

Parameters:
g - the graphics context for the display.
Overrides:
paint in class Canvas
o clearCanvas 
 private void clearCanvas(Graphics g)
Prepares the drawing area by clearing it to the background color.

Parameters:
g - the graphics context for the display.
o frameCanvas 
 private void frameCanvas(Graphics g)
Draws a frame around the display canvas.

Parameters:
g - the graphics context for the display.
o setSizes 
 public void setSizes()
Gets the current size of the display canvas and sets the size attributes.

o rectInside 
 public static boolean rectInside(Rectangle a,
                                  Rectangle b)
Check whether one rectangle is inside another.

Parameters:
a - the containing rectangle.
b - the contained rectangle.
Returns:
true if A contains all four corners of B; false otherwise.
o getTimeString 
 public static String getTimeString(long t)
Converts a time in hundredths of a second to a string giving days, hours, minutes, and seconds.

Parameters:
t - The time interval, in hundredths of a second.
Returns:
A string giving the time interval in readable units.
o getBandwidthString 
 public static String getBandwidthString(long b)
Converts a bandwidth in cells per second to a string giving the bandwidth in Kbps or Mbps.

Parameters:
b - The bandwidth, in cells per second.
Returns:
A string giving the bandwidth in readable units.