ej.fp.widget

Class LED

java.lang.Object

ej.fp.Widget

ej.fp.widget.LED

All Implemented Interfaces:

LLUILedImpl

public class LED
extends Widget
implements LLUILedImpl

This widget is an implementation of MicroUI LLUILedImpl interface. An implementation of this interface is required to be able to use a MicroUI Led in a MicroEJ application.

Nested Class Summary

Nested classes/interfaces inherited from class ej.fp.Widget

Widget.WidgetAttribute, Widget.WidgetDescription

Field Summary

Fields inherited from class ej.fp.Widget

DEFAULT_LABEL

Fields inherited from interface ej.microui.led.LLUILedImpl

MAX_INTENSITY, MIN_INTENSITY

Constructor Summary

Constructors

Constructor and Description
LED()

Method Summary

Modifier and Type	Method and Description
void	dispose() Disposes the widget's associated resources (such as threads, images...).
void	finalizeConfiguration() Checks whether the widget configuration is valid or not and finalizes the widget configuration according all attributes previously set.
int	getIntensity() Gets the intensity of this led.
void	setIntensity(int intensity) Sets the intensity of this led.
void	setLedOff(Image ledOff) Sets the image which represents the LED off.
void	setLedOn(Image ledOn) Sets the image which represents the LED on.
void	showYourself(boolean appearSwitchedOn) Called by front panel viewer to make widgets appear as if "switched on" or not.

Methods inherited from class ej.fp.Widget

getAbsoluteX, getAbsoluteY, getCurrentSkin, getFilter, getHeight, getLabel, getParent, getSkin, getWidth, getX, getY, isOver, repaint, repaint, setCurrentSkin, setFilter, setHeight, setLabel, setOverlay, setSkin, setWidth, setX, setY, start

Methods inherited from class java.lang.Object

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

Constructor Detail

LED

public LED()

Method Detail

dispose

public void dispose()

Description copied from class: Widget

Disposes the widget's associated resources (such as threads, images...).

Default behavior disposes the common images and subclasses should override this method to define their own behavior.

This method should only be called by front panel engine.

Overrides:

dispose in class Widget

finalizeConfiguration

public void finalizeConfiguration()

Description copied from class: Widget

Checks whether the widget configuration is valid or not and finalizes the widget configuration according all attributes previously set.

The widget attributes are set by the front panel parser but the order is not defined. This method allows to perform some checks between several attributes (this method is called by the front panel parser after setting all attributes defined in front panel file).

The configuration validation depends on widget itself. Each subclass must verify its configuration after checking its parent configuration.

When framework calling this method, all device widgets are not created and finalized yet, and by extension the device itself is not fully created too. So the implementation must not have to call some methods on other widgets and the methods Device.getDevice() or FrontPanel.getDevice(). As soon as all widgets are created and finalized, the simulation starts calling the method Widget.start() on each widget. As this moment only, the widget is able to use the other widgets and the device itself.

On configuration error, a RuntimeException (or a subclass of RuntimeException) must be thrown.

This method should only be called by front panel parser.

Overrides:

finalizeConfiguration in class Widget

getIntensity

public int getIntensity()

Description copied from interface: LLUILedImpl

Gets the intensity of this led.

Specified by:

getIntensity in interface LLUILedImpl

Returns:

intensity the led intensity.

setIntensity

public void setIntensity(int intensity)

Description copied from interface: LLUILedImpl

Sets the intensity of this led.

Specified by:

setIntensity in interface LLUILedImpl

Parameters:

intensity - the intensity to set.

setLedOff

public void setLedOff(Image ledOff)

Sets the image which represents the LED off.

This method should only be called by front panel parser.

Parameters:

ledOff - the LED off image.

setLedOn

public void setLedOn(Image ledOn)

Sets the image which represents the LED on.

This method should only be called by front panel parser.

Parameters:

ledOn - the LED on image.

showYourself

public void showYourself(boolean appearSwitchedOn)

Description copied from class: Widget

Called by front panel viewer to make widgets appear as if "switched on" or not. Useful to render widgets during the front panel device creation: it allows to show some "visual" widgets (display, LEDs etc.) as at runtime.

This method does nothing by default.

This method should only be called by front panel engine.

Overrides:

showYourself in class Widget

Parameters:

appearSwitchedOn - true to switch on widget, false to switch off.