m3g03.midp2
Class GameCanvasKeyStates

java.lang.Object
  javax.microedition.lcdui.Displayable
      javax.microedition.lcdui.Canvas
          javax.microedition.lcdui.game.GameCanvas
              m3g03.midp2.GameCanvasKeyStates

All Implemented Interfaces:

java.lang.Runnable

public class GameCanvasKeyStates
extends javax.microedition.lcdui.game.GameCanvas
implements java.lang.Runnable

Displays key states read from GameCanvas.getKeyStates(). This method only returns game actions, not general purpose keys.

Author:

Claus Hoefele

Field Summary

private javax.microedition.lcdui.Graphics	graphics Graphics singleton used for rendering.
private boolean	isRunning Flag for stopping the Thread.
private static java.util.Hashtable	KEY_STATES Maps key states to a name that can be displayed.

Fields inherited from class javax.microedition.lcdui.game.GameCanvas

DOWN_PRESSED, FIRE_PRESSED, GAME_A_PRESSED, GAME_B_PRESSED, GAME_C_PRESSED, GAME_D_PRESSED, LEFT_PRESSED, RIGHT_PRESSED, UP_PRESSED

Fields inherited from class javax.microedition.lcdui.Canvas

DOWN, FIRE, GAME_A, GAME_B, GAME_C, GAME_D, KEY_NUM0, KEY_NUM1, KEY_NUM2, KEY_NUM3, KEY_NUM4, KEY_NUM5, KEY_NUM6, KEY_NUM7, KEY_NUM8, KEY_NUM9, KEY_POUND, KEY_STAR, LEFT, RIGHT, UP

Constructor Summary

GameCanvasKeyStates()
Constructor.

Method Summary

void	hideNotify() Stops the display loop.
private void	render(javax.microedition.lcdui.Graphics graphics) Renders the key states.
void	run() Drives the animation.
void	showNotify() Called when this sample is displayed.

Methods inherited from class javax.microedition.lcdui.game.GameCanvas

flushGraphics, flushGraphics, getGraphics, getKeyStates, paint

Methods inherited from class javax.microedition.lcdui.Canvas

getGameAction, getKeyCode, getKeyName, hasPointerEvents, hasPointerMotionEvents, hasRepeatEvents, isDoubleBuffered, keyPressed, keyReleased, keyRepeated, pointerDragged, pointerPressed, pointerReleased, repaint, repaint, serviceRepaints, setCommandListener, setFullScreenMode, sizeChanged

Methods inherited from class javax.microedition.lcdui.Displayable

addCommand, getHeight, getTicker, getTitle, getWidth, isShown, removeCommand, setTicker, setTitle

Methods inherited from class java.lang.Object

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

Field Detail

isRunning

private boolean isRunning

Flag for stopping the Thread.

graphics

private javax.microedition.lcdui.Graphics graphics

Graphics singleton used for rendering.

KEY_STATES

private static final java.util.Hashtable KEY_STATES

Maps key states to a name that can be displayed.

Constructor Detail

GameCanvasKeyStates

public GameCanvasKeyStates()

Constructor.

Method Detail

showNotify

public void showNotify()

Called when this sample is displayed. Starts the display loop.

Overrides:

showNotify in class javax.microedition.lcdui.Canvas

hideNotify

public void hideNotify()

Stops the display loop.

Overrides:

hideNotify in class javax.microedition.lcdui.Canvas

run

public void run()

Drives the animation.

Specified by:

run in interface java.lang.Runnable

render

private void render(javax.microedition.lcdui.Graphics graphics)

Renders the key states.

Parameters:

graphics - graphics context for rendering.