nextapp.echoservlet.ui
Class LabelUI

java.lang.Object
  nextapp.echoservlet.ComponentPeer
      nextapp.echoservlet.ui.LabelUI

All Implemented Interfaces:

Alignment, java.util.EventListener, nextapp.echo.event.ImageUpdateListener, java.beans.PropertyChangeListener, java.io.Serializable

public class LabelUI

extends ComponentPeer

implements Alignment, nextapp.echo.event.ImageUpdateListener, java.beans.PropertyChangeListener

A peer for Label components.

See Also:

Serialized Form

Field Summary

private ImageManager	imageManager An image manager that will handle the label's icon.
private static java.lang.String	LABEL_IMAGE A string that will indentify the label's icon in the ImageManager.

Fields inherited from class nextapp.echoservlet.ComponentPeer

Constructor Summary

LabelUI()

Method Summary

private Element	createIconElement(RenderingContext rc) Creates the image Element that will reference the label's image.
int	getHorizontalAlignment() Returns the horizontal alignment of a represented component.
int	getVerticalAlignment() Returns the vertical alignment of a represented component.
void	imageUpdate(nextapp.echo.event.ImageUpdateEvent e) Invoked when an image update change occurs.
void	propertyChange(java.beans.PropertyChangeEvent e)
void	registered() Called when the component is registered.
void	render(RenderingContext rc, Element parent) A method that should be overridden for the ComponentPeer to produce HTML output.
void	unregistered() Called when the component is unregistered.

Methods inherited from class nextapp.echoservlet.ComponentPeer

addAncillaryService, generateId, getBackground, getChildCount, getChildren, getComponent, getFont, getForeground, getId, getInstancePeer, getParent, getPeer, redraw, removeAncillaryService

Methods inherited from class java.lang.Object

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

Field Detail

LABEL_IMAGE

private static final java.lang.String LABEL_IMAGE

A string that will indentify the label's icon in the ImageManager.

See Also:

Constant Field Values

imageManager

private ImageManager imageManager

An image manager that will handle the label's icon. The image manager is lazy-created.

Constructor Detail

LabelUI

public LabelUI()

Method Detail

createIconElement

private Element createIconElement(RenderingContext rc)

Creates the image Element that will reference the label's image.

Parameters:

rc - The RenderingContext on which this label is being rendered.

Returns:

An <img> element reference the label's image.

getHorizontalAlignment

public int getHorizontalAlignment()

Description copied from interface: Alignment

Returns the horizontal alignment of a represented component.

Specified by:

getHorizontalAlignment in interface Alignment

Returns:

The horizontal alignment of a represented component, one of the following values:

• EchoConstants.LEFT
• EchoConstants.CENTER
• EchoConstants.RIGHT
• 0 (use default)

See Also:

Alignment.getHorizontalAlignment()

getVerticalAlignment

public int getVerticalAlignment()

Description copied from interface: Alignment

Returns the vertical alignment of a represented component.

Specified by:

getVerticalAlignment in interface Alignment

Returns:

The vertical alignment of a represented component, one of the following values:

• EchoConstants.TOP
• EchoConstants.CENTER
• EchoConstants.BOTTOM
• 0 (use default)

See Also:

Alignment.getVerticalAlignment()

imageUpdate

public void imageUpdate(nextapp.echo.event.ImageUpdateEvent e)

Description copied from interface: nextapp.echo.event.ImageUpdateListener

Invoked when an image update change occurs.

Specified by:

imageUpdate in interface nextapp.echo.event.ImageUpdateListener

Parameters:

e - The event describing the image update.

See Also:

ImageUpdateListener.imageUpdate(ImageUpdateEvent)

propertyChange

public void propertyChange(java.beans.PropertyChangeEvent e)

Specified by:

propertyChange in interface java.beans.PropertyChangeListener

See Also:

PropertyChangeListener.propertyChange(PropertyChangeEvent)

registered

public void registered()

Description copied from class: ComponentPeer

Called when the component is registered. This method should be overridden if necessary.

Overrides:

registered in class ComponentPeer

See Also:

ComponentPeer.registered()

render

public void render(RenderingContext rc,
                   Element parent)

Description copied from class: ComponentPeer

A method that should be overridden for the ComponentPeer to produce HTML output.

Overrides:

render in class ComponentPeer

Parameters:

rc - A rendering context provided by the Connection.

parent - The element that will contain content rendered by this ComponentPeer.

See Also:

ComponentPeer.render(RenderingContext, Element)

unregistered

public void unregistered()

Description copied from class: ComponentPeer

Called when the component is unregistered. This method should be overridden if necessary.

Overrides:

unregistered in class ComponentPeer

See Also:

ComponentPeer.unregistered()