Class DefaultDisplay

java.lang.Object
  |
  +--ScaledDisplay
        |
        +--DefaultDisplay

All Implemented Interfaces:

LocatableDisplay

Direct Known Subclasses:

TextCellDisplay

public class DefaultDisplay

extends ScaledDisplay

AP® Computer Science Marine Biology Simulation:
A DefaultDisplay draws a centered question-mark. A DefaultDisplay object is used to display any locatable object that doesn't have a specialized display object. The association between a particular Locatable subclass and its display object is handled in the DisplayMap class.

The DefaultDisplay class is copyright© 2002 College Entrance Examination Board (www.collegeboard.com). It has been modified as allowed by the GNU General Public License.

Version:

1 November 2002

See Also:

Environment, DisplayMap

Constructor Summary

DefaultDisplay()

Method Summary

void	draw(Locatable obj, java.awt.Component comp, java.awt.Graphics2D g2) Draws the given object.
protected void	paintCenteredText(java.awt.Graphics2D g2, java.lang.String s, float centerX, float centerY) Paints a horizontally and vertically-centered text string.

Methods inherited from class ScaledDisplay

adjust, draw

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DefaultDisplay

public DefaultDisplay()

Method Detail

draw

public void draw(Locatable obj,
                 java.awt.Component comp,
                 java.awt.Graphics2D g2)

Draws the given object. This implementation draws a question mark using the Java 2D Graphics API.

Overrides:

draw in class ScaledDisplay

Parameters:

obj - object we want to draw

comp - component on which to draw

g2 - drawing surface

paintCenteredText

protected void paintCenteredText(java.awt.Graphics2D g2,
                                 java.lang.String s,
                                 float centerX,
                                 float centerY)

Paints a horizontally and vertically-centered text string. This method is adapted from p. 134 of J. Knudsen's book, Java 2D Graphics, published by O'Reilly & Associates (1999).

Parameters:

g2 - drawing surface

s - string to draw (centered)

centerX - x-coordinate of center point

centerY - y-coordinate of center point