org.zkoss.zul
Class Include

java.lang.Object
  org.zkoss.zk.ui.AbstractComponent
      org.zkoss.zk.ui.HtmlBasedComponent
          org.zkoss.zul.impl.XulElement
              org.zkoss.zul.Include

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, Component, AfterCompose, DynamicPropertied, Includer, Scope, IdSpace, ComponentCtrl

public class Include
extends XulElement
implements Includer, DynamicPropertied, AfterCompose, IdSpace

Includes the result generated by any servlet, not limited to a ZUML page.

Non-XUL extension.

If this component is the only child of its parent, the default width and height will become 100%.

The instant mode

In the instant mode, the page to be included are loaded 'instantly' with Execution.createComponents(org.zkoss.zk.ui.metainfo.PageDefinition, org.zkoss.zk.ui.Component, java.util.Map) when afterCompose() is called. Furthermore, the components are created as the child components of this include component (like a macro component).

Notices:

• The instant mode is supported automatically if the include component is created by a ZUML page. If you want to create it programmingly, you have to invoke afterCompose() after assigning the source (setSrc(java.lang.String)).
• The instant mode doesn't support setProgressing(boolean) nor setLocalized(boolean)
• The directives of the included page won't be included. It means <?style?> won't be evaluated. Thus, if you want to embed JavaScript files or codes in a page that might be included, it is better to use the script component (Script).

The defer mode

In the defer mode (the only mode supported by ZK prior to 3.6.2), the page is included by servlet container (the include method of javax.servlet.RequestDispatcher) in the render phase (i.e., after all components are created). The page can be any servlet; not limited to a ZUML page.

If it is eventually another ZUML page, a ZK page (Page) is created and added to the current desktop. You can access them only via inter-page API (seePath).

Notice that if a non-ZUML page, such as HTML fragment, is included, the content might be evaluated before ZK widgets are instantiated and rendered (so-called mounted). Thus, the embedded JavaScript code might be evaluated early. If you prefer to run them later, you could either use zk.afterMount(function(){...}) to defer the execute, or specify the custom attribute called org.zkoss.zul.include.html.defer to true.

The auto mode (default)

In the auto mode, the include component decides the mode based on the name specified in the src property (setSrc(java.lang.String)). If src is ended with the extension named .zul or .zhtml, the instant mode is assumed. Otherwise, the defer mode is assumed. Notice that if a query string is specified, the defer mode is assumed, too.

Notice that invoking setProgressing(boolean) or setLocalized(boolean) with true will imply the defer mode (if the mode is auto).

Backward Compatibility: Since 3.6.2, there are three modes: auto (default), instant and defer. The behavior prior to 3.6.2 is the same as the defer mode. The default mode is auto since 5.0. However, you can change it to defer by specifying a library property named org.zkoss.zul.include.mode (for backward compatibility).

Passing Parameters

There are two ways to pass parameters to the included page:

First, since ZK 3.0.4, you can use setDynamicProperty(java.lang.String, java.lang.Object), or, in ZUL,

<include src="/WEB-INF/mypage" arg="something"/>

Second, you can use the query string:

<include src="/WEB-INF/mypage?arg=something"/>

With the query string, you can pass only the String values. and the parameter can be accessed by Execution.getParameter(java.lang.String) or javax.servlet.ServletRequest's getParameter. Or, you can access it with the param variable in EL expressions.

On the other hand, the dynamic properties (setDynamicProperty(java.lang.String, java.lang.Object)) are passed to the included page thru the request's attributes You can pass any type of objects you want. In the included page, you can access them by use of Execution.getAttribute(java.lang.String) or javax.servlet.ServletRequest's getAttribute. Or, you can access with the requestScope variable in EL expressions.

Macro Component versus Include

If the include component is in the instant mode, it is almost the same as a macro component. On the other hand, if in the defer mode, they are different:

1. Include (in defer mode) could include anything include ZUML, JSP or any other servlet, while a macro component could embed only a ZUML page.
2. If Include (in defer mode) includes a ZUML page, a Page instance is created which is owned by Include. On the other hand, a macro component makes the created components as the direct children -- i.e., you can browse them with Component.getChildren().
3. Include (in defer mode) creates components in the Rendering phase, while a macro component creates components in HtmlMacroComponent.afterCompose().
4. invalidate() (in defer mode) will cause it to re-include the page (and then recreate the page if it includes a ZUML page). However, AbstractComponent.invalidate() just causes it to redraw and update the content at the client -- like any other component does. To re-create, you have to invoke HtmlMacroComponent.recreate().

In additions to macro and Include, you can use the fulfill attribute as follows: <div fulfill="=/my/foo.zul">...</div>

Custom Attribute

org.zkoss.zul.include.html.defer

[default: false] Whether to defer the rendering of non-ZUML page until all widgets are instantiated and rendered at client (so-called mounted).

Author:

tomyeh

See Also:

Iframe, Serialized Form

Nested Class Summary

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

HtmlBasedComponent.ExtraCtrl

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

AbstractComponent.Children

Field Summary

Fields inherited from class org.zkoss.zk.ui.HtmlBasedComponent

_zclass

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

Include()

Include(java.lang.String src)

Method Summary

void	afterCompose() Invokes after ZK loader creates this component, initializes it and composes all its children, if any.
void	clearDynamicProperties() Removes all dynamic properties.
void	detach() Detaches this component such that it won't belong to any page.
Page	getChildPage() Returns the child page.
java.lang.Object	getDynamicProperty(java.lang.String name) Returns the parameter associated with the specified name, or null if not found.
java.lang.String	getMode() Returns the inclusion mode.
boolean	getProgressing() Returns whether to show the MZul.PLEASE_WAIT message before a long operation.
java.lang.String	getSrc() Returns the src.
boolean	hasDynamicProperty(java.lang.String name) Returns whether a dynamic property is defined.
void	invalidate() Invalidates this component.
protected boolean	isChildable() Default: not childable.
boolean	isComment() Returns whether to generate the included content inside the HTML comment.
boolean	isLocalized() Returns whether the source depends on the current Locale.
void	onAfterCompose()
void	onEchoInclude() Internal use only.
void	onPageAttached(Page newpage, Page oldpage) Default: handles special event listeners.
protected void	renderProperties(ContentRenderer renderer) Renders the content of this component, excluding the enclosing tags and children.
void	setChildPage(Page page) Sets the child page.
void	setComment(boolean comment) Sets whether to generate the included content inside the HTML comment.
void	setDynamicProperty(java.lang.String name, java.lang.Object value) Adds a dynamic property that will be passed to the included page via the request's attribute.
void	setLocalized(boolean localized) Sets whether the source depends on the current Locale.
void	setMode(java.lang.String mode) Sets the inclusion mode.
void	setProgressing(boolean progressing) Sets whether to show the MZul.PLEASE_WAIT message before a long operation.
void	setRenderingResult(java.lang.String result) Sets the rendering result It is called when the child page (Includer.getChildPage()) has been rendered.
void	setSrc(java.lang.String src) Sets the src.

Methods inherited from class org.zkoss.zul.impl.XulElement

clone, getContext, getCtrlKeys, getPopup, getTooltip, setContext, setContext, setCtrlKeys, setPopup, setPopup, setTooltip, setTooltip

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

focus, getAction, getDraggable, getDroppable, getExtraCtrl, getHeight, getHflex, getLeft, getRenderdefer, getSclass, getStyle, getTooltiptext, getTop, getVflex, getWidth, getZclass, getZindex, getZIndex, service, setAction, setClass, setDraggable, setDroppable, setFocus, setHeight, setHeightDirectly, setHflex, setHflexDirectly, setLeft, setLeftDirectly, setRenderdefer, setSclass, setStyle, setTooltiptext, setTop, setTopDirectly, setVflex, setWidth, setWidthDirectly, setZclass, setZindex, setZIndex, setZIndexDirectly

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

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

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.zkoss.zk.ui.IdSpace

getFellow, getFellow, getFellowIfAny, getFellowIfAny, getFellows, hasFellow, hasFellow

Methods inherited from interface org.zkoss.zk.ui.ext.Scope

addScopeListener, getAttribute, getAttribute, getAttributes, hasAttribute, hasAttribute, removeAttribute, removeAttribute, removeScopeListener, setAttribute, setAttribute

Constructor Detail

Include

public Include()

Include

public Include(java.lang.String src)

Method Detail

setProgressing

public void setProgressing(boolean progressing)

Sets whether to show the MZul.PLEASE_WAIT message before a long operation. This implementation will automatically use an echo event like Events.echoEvent(String, org.zkoss.zk.ui.Component, String) to suspend the including progress before using the Clients.showBusy(String) method to show the MZul.PLEASE_WAIT message at client side.

If setProgressing(true) is called, the defer mode is enabled automatically if the current mode is auto.

Default: false.

Since:

3.0.4

getProgressing

public boolean getProgressing()

Returns whether to show the MZul.PLEASE_WAIT message before a long operation.

Default: false.

Since:

3.0.4

onEchoInclude

public void onEchoInclude()

Internal use only.

Since:

3.0.4

getSrc

public java.lang.String getSrc()

Returns the src.

Default: null.

setSrc

public void setSrc(java.lang.String src)

Sets the src.

If src is changed, the whole component is invalidate. Thus, you want to smart-update, you have to override this method.

Parameters:

src - the source URI. If null or empty, nothing is included. You can specify the source URI with the query string and they will become a parameter that can be accessed by use of Execution.getParameter(java.lang.String) or javax.servlet.ServletRequest's getParameter. For example, if "/a.zul?b=c" is specified, you can access the parameter with ${param.b} in a.zul.

See Also:

setDynamicProperty(java.lang.String, java.lang.Object)

detach

public void detach()

Description copied from interface: Component

Detaches this component such that it won't belong to any page. If you don't call Component.setParent(org.zkoss.zk.ui.Component) or Component.setPage(org.zkoss.zk.ui.Page) to attach it to any page, it will be removed automatically (from the client) after the current event is processed.

Specified by:

detach in interface Component

Overrides:

detach in class AbstractComponent

getMode

public java.lang.String getMode()

Returns the inclusion mode. There are three modes: auto, instant and defer. The behavior prior to 3.6.2 is the same as the defer mode.

Default: auto (since 5.0.0).

Since:

3.6.2

setMode

public void setMode(java.lang.String mode)
             throws WrongValueException

Sets the inclusion mode.

Parameters:

mode - the inclusion mode: auto, instant or defer.

Throws:

WrongValueException

Since:

3.6.2

isLocalized

public boolean isLocalized()

Returns whether the source depends on the current Locale. If true, it will search xxx_en_US.yyy, xxx_en.yyy and xxx.yyy for the proper content, where src is assumed to be xxx.yyy.

Default: false;

setLocalized

public void setLocalized(boolean localized)

Sets whether the source depends on the current Locale.

isComment

public boolean isComment()

Returns whether to generate the included content inside the HTML comment.

Default: false.

It is useful if you want to include non-HTML content. For example,

Then, it will generate

<div id="uuid">
<!--
 //the content of a.xml
-->

Notice that it is ignored in the instance mode (getMode()).

Since:

5.0.0

setComment

public void setComment(boolean comment)

Sets whether to generate the included content inside the HTML comment.

Since:

5.0.0

See Also:

isComment()

getChildPage

public Page getChildPage()

Description copied from interface: Includer

Returns the child page.

Specified by:

getChildPage in interface Includer

setChildPage

public void setChildPage(Page page)

Description copied from interface: Includer

Sets the child page.

Used only for implementing an includer component (such as Include).

Note: the child page is actually maintained by the included page, so the implementation of this method needs only to store the page in a transient member.

Notice that, like Includer.setRenderingResult(java.lang.String), it is called only if the included page is a ZUML document.

Specified by:

setChildPage in interface Includer

setRenderingResult

public void setRenderingResult(java.lang.String result)

Description copied from interface: Includer

Sets the rendering result It is called when the child page (Includer.getChildPage()) has been rendered. The includer can then generate it to the output in the way it'd like.

Used only for implementing an includer component (such as Include).

Notice that, like Includer.setChildPage(org.zkoss.zk.ui.Page), it is called only if the included page is a ZUML document.

Specified by:

setRenderingResult in interface Includer

onPageAttached

public void onPageAttached(Page newpage,
                           Page oldpage)

Description copied from class: AbstractComponent

Default: handles special event listeners.

Specified by:

onPageAttached in interface ComponentCtrl

Overrides:

onPageAttached in class AbstractComponent

Parameters:

newpage - the new page (never null).

oldpage - the previous page, if any, or null if it didn't belong to any page.

See Also:

ComponentCtrl.onPageAttached(org.zkoss.zk.ui.Page, org.zkoss.zk.ui.Page)

onAfterCompose

public void onAfterCompose()

afterCompose

public void afterCompose()

Description copied from interface: AfterCompose

Invokes after ZK loader creates this component, initializes it and composes all its children, if any.

Specified by:

afterCompose in interface AfterCompose

hasDynamicProperty

public boolean hasDynamicProperty(java.lang.String name)

Returns whether a dynamic property is defined.

Specified by:

hasDynamicProperty in interface DynamicPropertied

getDynamicProperty

public java.lang.Object getDynamicProperty(java.lang.String name)

Returns the parameter associated with the specified name, or null if not found.

Specified by:

getDynamicProperty in interface DynamicPropertied

Since:

3.0.4

See Also:

setDynamicProperty(java.lang.String, java.lang.Object)

setDynamicProperty

public void setDynamicProperty(java.lang.String name,
                               java.lang.Object value)

Adds a dynamic property that will be passed to the included page via the request's attribute.

For example, if setDynamicProperty("abc", new Integer(4)) is called, then the included page can retrived the abc property by use of ${reqestScope.abc}

Specified by:

setDynamicProperty in interface DynamicPropertied

Since:

3.0.4

clearDynamicProperties

public void clearDynamicProperties()

Removes all dynamic properties.

Since:

5.0.1

invalidate

public void invalidate()

Invalidates this component. It works for both the instant and defer mode. Notice that all children will be detached (the instant mode) and the page will be reloaded (and new children will be created).

Specified by:

invalidate in interface Component

Overrides:

invalidate in class AbstractComponent

isChildable

protected boolean isChildable()

Default: not childable.

Overrides:

isChildable in class AbstractComponent

renderProperties

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

Description copied from class: HtmlBasedComponent

Renders the content of this component, excluding the enclosing tags and children.

See also ZK Client-side Reference: Property Rendering

Overrides:

renderProperties in class XulElement

Throws:

java.io.IOException