de.enough.polish.ui
Class MasterCanvas

java.lang.Object
  javax.microedition.lcdui.Displayable
      javax.microedition.lcdui.Canvas
          de.enough.polish.ui.MasterCanvas

public class MasterCanvas
extends javax.microedition.lcdui.Canvas

Is used for only displaying a single canvas for devices that flicker between screen changes.

Copyright (c) Enough Software 2005 - 2008

 history
        03-Jun-2005 - rob creation
 

Author:

Robert Virkus, j2mepolish@enough.de

Field Summary

protected AccessibleCanvas	currentCanvas
protected javax.microedition.lcdui.Displayable	currentDisplayable
static MasterCanvas	instance the master canvas that actually displays the canvas that should be shown

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

Method Summary

static javax.microedition.lcdui.Displayable	getCurrent(javax.microedition.lcdui.Display display) Retrieves the currently shown displayable.
static int	getScreenHeight()
static int	getScreenWidth()
protected void	hideNotify()
static boolean	isAccessibleCanvasShown(AccessibleCanvas canvas) Determines if the specified canvas is currently being shown
static boolean	isCanvasShown(javax.microedition.lcdui.Canvas canvas) Determines if the specified canvas is currently being shown
static boolean	isDisplayableShown(javax.microedition.lcdui.Displayable displayable) Determines if the specified displayable is currently being shown
protected void	keyPressed(int keyCode)
protected void	keyReleased(int keyCode)
protected void	keyRepeated(int keyCode)
protected void	paint(javax.microedition.lcdui.Graphics g)
protected void	pointerDragged(int x, int y)
protected void	pointerPressed(int x, int y)
protected void	pointerReleased(int x, int y)
static void	repaintAccessibleCanvas(AccessibleCanvas canvas) Repaints an accessible canvas.
static void	repaintCanvas(javax.microedition.lcdui.Canvas canvas) Repaints a normal canvas
static void	repaintCanvas(javax.microedition.lcdui.Canvas canvas, int x, int y, int width, int height) Repaints the specified area of a normal canvas
static void	setCurrent(javax.microedition.lcdui.Display display, javax.microedition.lcdui.Displayable nextDisplayable) Sets the current screen/displayable.
protected void	showNotify()
protected void	sizeChanged(int width, int height)

Methods inherited from class javax.microedition.lcdui.Canvas

getGameAction, getKeyCode, getKeyName, hasPointerEvents, hasPointerMotionEvents, hasRepeatEvents, isDoubleBuffered, repaint, repaint, serviceRepaints, setFullScreenMode

Methods inherited from class javax.microedition.lcdui.Displayable

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

Methods inherited from class java.lang.Object

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

Field Detail

instance

public static MasterCanvas instance

the master canvas that actually displays the canvas that should be shown

currentCanvas

protected AccessibleCanvas currentCanvas

currentDisplayable

protected javax.microedition.lcdui.Displayable currentDisplayable

Method Detail

hideNotify

protected void hideNotify()

Overrides:

hideNotify in class javax.microedition.lcdui.Canvas

showNotify

protected void showNotify()

Overrides:

showNotify in class javax.microedition.lcdui.Canvas

keyPressed

protected void keyPressed(int keyCode)

Overrides:

keyPressed in class javax.microedition.lcdui.Canvas

keyRepeated

protected void keyRepeated(int keyCode)

Overrides:

keyRepeated in class javax.microedition.lcdui.Canvas

keyReleased

protected void keyReleased(int keyCode)

Overrides:

keyReleased in class javax.microedition.lcdui.Canvas

pointerPressed

protected void pointerPressed(int x,
                              int y)

Overrides:

pointerPressed in class javax.microedition.lcdui.Canvas

pointerReleased

protected void pointerReleased(int x,
                               int y)

Overrides:

pointerReleased in class javax.microedition.lcdui.Canvas

pointerDragged

protected void pointerDragged(int x,
                              int y)

Overrides:

pointerDragged in class javax.microedition.lcdui.Canvas

sizeChanged

protected void sizeChanged(int width,
                           int height)

Overrides:

sizeChanged in class javax.microedition.lcdui.Canvas

getScreenHeight

public static int getScreenHeight()

getScreenWidth

public static int getScreenWidth()

paint

protected void paint(javax.microedition.lcdui.Graphics g)

Specified by:

paint in class javax.microedition.lcdui.Canvas

setCurrent

public static void setCurrent(javax.microedition.lcdui.Display display,
                              javax.microedition.lcdui.Displayable nextDisplayable)

Sets the current screen/displayable.

Parameters:

display - the display

nextDisplayable - the screen/displayable that should be shown

getCurrent

public static javax.microedition.lcdui.Displayable getCurrent(javax.microedition.lcdui.Display display)

Retrieves the currently shown displayable.

Parameters:

display - the display that is being used to change displayables

Returns:

the currently shown displayable.

repaintAccessibleCanvas

public static void repaintAccessibleCanvas(AccessibleCanvas canvas)

Repaints an accessible canvas.

Parameters:

canvas - the canvas that requires a repaint

repaintCanvas

public static void repaintCanvas(javax.microedition.lcdui.Canvas canvas)

Repaints a normal canvas

Parameters:

canvas - the canvas that requires a repaint

repaintCanvas

public static void repaintCanvas(javax.microedition.lcdui.Canvas canvas,
                                 int x,
                                 int y,
                                 int width,
                                 int height)

Repaints the specified area of a normal canvas

Parameters:

canvas - the canvas that should be repainted partically

x - horizontal start

y - vertical start

width - width

height - height of the the repaint area in pixels

isAccessibleCanvasShown

public static boolean isAccessibleCanvasShown(AccessibleCanvas canvas)

Determines if the specified canvas is currently being shown

Parameters:

canvas - the canvas

Returns:

true when the canvas is currently the first display on the screen

isCanvasShown

public static boolean isCanvasShown(javax.microedition.lcdui.Canvas canvas)

Determines if the specified canvas is currently being shown

Parameters:

canvas - the canvas

Returns:

true when the canvas is currently the first display on the screen

isDisplayableShown

public static boolean isDisplayableShown(javax.microedition.lcdui.Displayable displayable)

Determines if the specified displayable is currently being shown

Parameters:

displayable - the displayayable

Returns:

true when the canvas is currently the first display on the screen