org.zkoss.zul
Class Script

java.lang.Object
  org.zkoss.zk.ui.AbstractComponent
      org.zkoss.zul.Script

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, Component, Scope, ComponentCtrl

public class Script
extends AbstractComponent

A component to generate script codes that will be evaluated at the client. It is similar to HTML SCRIPT tag, except the defer option (setDefer(boolean)) will cause the evaluation of JavaScript until the widget has been instantiated and mounted to the DOM tree.

Note: it is the script codes running at the client, not at the server. Don't confuse it with the zscript element.

There are several way to embed script codes in a ZUML page:

Approach 1: Specify the URL of the JS file without defer. The JavaScript codes are evaluated as soon as the file is loaded.

<script src="my.js"/>
 

Approach 2: Specify the JavaScript codes directly without defer. The JavaScript codes are evaluated immediately before the widget is instantiated, so you cannot access any widget. Rather, it is used to do desktop-level initialization, such as defining a widget class, and a global function.

<script defer="true">
 zk.$package('foo');
 zk.load('zul.wgt', function () {
 foo.Foo = zk.$extends(zul.Widget, {
 //...
</script>
 

Approach 3: Specify the JavaScript codes directly with defer. The JavaScipt codes are evaluated after the widget is instantiated and mounted. Moreover, this references to the script widget, so you can access the widgets as follows.

<script defer="true">
 this.getFellow('l').setValue('new value');
 //...
</script>
 

Alternative to Script, you can use the script directive as shown below..

<:?script src="/js/mine.js"?/>
<:?script content="jq.IE6_ALPHAFIX=/.png/"?/>
 

Author:

tomyeh

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.zkoss.zk.ui.AbstractComponent

AbstractComponent.Children

Field Summary

Fields inherited from interface org.zkoss.zk.ui.Component

APPLICATION_SCOPE, COMPONENT_SCOPE, DESKTOP_SCOPE, PAGE_SCOPE, REQUEST_SCOPE, SESSION_SCOPE, SPACE_SCOPE

Fields inherited from interface org.zkoss.zk.ui.sys.ComponentCtrl

CE_BUSY_IGNORE, CE_DUPLICATE_IGNORE, CE_IMPORTANT, CE_NON_DEFERRABLE, CE_REPEAT_IGNORE

Constructor Summary

Script()

Script(java.lang.String content)
Constructs a script component with the specified content.

Method Summary

java.lang.String	getCharset() Returns the character enconding of the source.
java.lang.String	getContent() Returns the content of the script element.
java.lang.String	getPackages() Returns the list of packages to load before evaluating the script defined in getContent().
java.lang.String	getSrc() Returns the URI of the source that contains the script codes.
java.lang.String	getType() Deprecated. As of release 5.0.0, it is meaningless since text/javascript is always assumed.
protected boolean	isChildable() Not childable.
boolean	isDefer() Returns whether to defer the execution of the script codes until the widget is instantiated and mounted.
protected void	renderProperties(ContentRenderer renderer) Called by (ComponentCtrl.redraw(java.io.Writer)) to render the properties, excluding the enclosing tag and children.
void	setCharset(java.lang.String charset) Sets the character encoding of the source.
void	setContent(java.lang.String content) Sets the content of the script element.
void	setDefer(boolean defer) Sets whether to defer the execution of the script codes.
void	setPackages(java.lang.String packages) Sets the list of packages to load before evaluating the script defined in getContent().
void	setSrc(java.lang.String src) Sets the URI of the source that contains the script codes.
void	setType(java.lang.String type) Deprecated. As of release 5.0.0, it is meaningless since text/javascript is always assumed.

Methods inherited from class org.zkoss.zk.ui.AbstractComponent

addAnnotation, addAnnotation, addClientEvent, addEventHandler, addEventListener, addEventListener, addForward, addForward, addForward, addForward, addMoved, addRedrawCallback, addScopeListener, addShadowRoot, addShadowRootBefore, addSharedEventHandlerMap, appendChild, applyProperties, beforeChildAdded, beforeChildRemoved, beforeParentChanged, clone, detach, didActivate, didActivate, didDeserialize, didDeserialize, disableBindingAnnotation, disableClientUpdate, enableBindingAnnotation, equals, getAnnotatedProperties, getAnnotatedPropertiesBy, getAnnotation, getAnnotation, getAnnotations, getAnnotations, getAnnotations, getAttribute, getAttribute, getAttribute, getAttributeOrFellow, getAttributes, getAttributes, getAuService, getAutag, getChildren, getClientAttribute, getClientEvents, getDefaultMold, getDefinition, getDesktop, getEventHandler, getEventHandlerNames, getEventListenerMap, getEventListeners, getExtraCtrl, getFellow, getFellow, getFellowIfAny, getFellowIfAny, getFellows, getFirstChild, getId, getLastChild, getListenerIterator, getMold, getNextSibling, getPage, getParent, getPreviousSibling, getRedrawCallback, getRoot, getShadowRoots, getShadowVariable, getShadowVariable0, getSpaceOwner, getSpecialRendererOutput, getStubonly, getSubBindingAnnotationCount, getTemplate, getTemplateNames, getUuid, getWidgetAttribute, getWidgetAttributeNames, getWidgetClass, getWidgetListener, getWidgetListenerNames, getWidgetOverride, getWidgetOverrideNames, hasAttribute, hasAttribute, hasAttribute, hasAttributeOrFellow, hasBindingAnnotation, hasFellow, hasFellow, hasSubBindingAnnotation, insertBefore, invalidate, isInvalidated, isListenerAvailable, isVisible, onChildAdded, onChildRemoved, onPageAttached, onPageDetached, onWrongValue, query, queryAll, redraw, redrawChildren, removeAttribute, removeAttribute, removeAttribute, removeChild, removeEventListener, removeForward, removeForward, removeRedrawCallback, removeScopeListener, removeShadowRoot, render, render, render, replace, response, response, response, service, service, sessionDidActivate, sessionWillPassivate, setAttribute, setAttribute, setAttribute, setAuService, setAutag, setClientAttribute, setDefinition, setDefinition, setId, setMold, setPage, setPageBefore, setParent, setStubonly, setStubonly, setSubBindingAnnotationCount, setTemplate, setVisible, setVisibleDirectly, setWidgetAttribute, setWidgetClass, setWidgetListener, setWidgetOverride, smartUpdate, smartUpdate, smartUpdate, smartUpdate, smartUpdate, smartUpdate, smartUpdate, smartUpdate, smartUpdate, smartUpdateWidgetListener, smartUpdateWidgetOverride, toString, updateByClient, updateSubBindingAnnotationCount, willPassivate, willPassivate, willSerialize, willSerialize

Methods inherited from class java.lang.Object

finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Script

public Script()

Script

public Script(java.lang.String content)

Constructs a script component with the specified content.

Parameters:

content - the content (the code snippet).

Since:

6.0.0

Method Detail

getType

public java.lang.String getType()

Deprecated. As of release 5.0.0, it is meaningless since text/javascript is always assumed.

setType

public void setType(java.lang.String type)

Deprecated. As of release 5.0.0, it is meaningless since text/javascript is always assumed.

getCharset

public java.lang.String getCharset()

Returns the character enconding of the source. It is used with getSrc().

Default: null.

setCharset

public void setCharset(java.lang.String charset)

Sets the character encoding of the source. It is used with setSrc(java.lang.String).

Refer to HTML Character Setsfor more information.

getSrc

public java.lang.String getSrc()

Returns the URI of the source that contains the script codes.

Default: null.

setSrc

public void setSrc(java.lang.String src)

Sets the URI of the source that contains the script codes.

You either add the script codes directly with the Label children, or set the URI to load the script codes with setSrc(java.lang.String). But, not both.

Parameters:

src - the URI of the source that contains the script codes

isDefer

public boolean isDefer()

Returns whether to defer the execution of the script codes until the widget is instantiated and mounted.

Default: false.

Specifying false (default), if you want to do the desktop-level (or class-level) initialization, such as defining a widget class or a global function.

Specifying true, if you want to access widgets. Notice that this references to this script widget.

setDefer

public void setDefer(boolean defer)

Sets whether to defer the execution of the script codes.

See Also:

isDefer()

getContent

public java.lang.String getContent()

Returns the content of the script element. By content we mean the JavaScript codes that will be enclosed by the HTML SCRIPT element.

Default: null.

Deriving class can override this method to return whatever it prefers (ignored if null).

Since:

3.0.0

setContent

public void setContent(java.lang.String content)

Sets the content of the script element. By content we mean the JavaScript codes that will be enclosed by the HTML SCRIPT element.

Since:

3.0.0

getPackages

public java.lang.String getPackages()

Returns the list of packages to load before evaluating the script defined in getContent(). It is meaning only if getContent() not null.

Default: null.

Since:

5.0.0

setPackages

public void setPackages(java.lang.String packages)

Sets the list of packages to load before evaluating the script defined in getContent(). If more than a package to load, separate them with comma.

Since:

5.0.0

renderProperties

protected void renderProperties(ContentRenderer renderer)
                         throws java.io.IOException

Description copied from class: AbstractComponent

Called by (ComponentCtrl.redraw(java.io.Writer)) to render the properties, excluding the enclosing tag and children.

Default: it renders AbstractComponent.getId() if it was assigned, and event names if listened (and listed in AbstractComponent.getClientEvents()).

Note: it doesn't render AbstractComponent.getWidgetClass(), AbstractComponent.getUuid() and AbstractComponent.getMold(), which are caller's job.

Overrides:

renderProperties in class AbstractComponent

Throws:

java.io.IOException

isChildable

protected boolean isChildable()

Not childable.

Overrides:

isChildable in class AbstractComponent