org.zkoss.zul
Class Menuitem

java.lang.Object
  org.zkoss.zk.ui.AbstractComponent
      org.zkoss.zk.ui.HtmlBasedComponent
          org.zkoss.zul.impl.XulElement
              org.zkoss.zul.impl.LabelElement
                  org.zkoss.zul.impl.LabelImageElement
                      org.zkoss.zul.Menuitem

All Implemented Interfaces:

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

public class Menuitem
extends LabelImageElement
implements Disable

A single choice in a Menupopup element. It acts much like a button but it is rendered on a menu.

Default getZclass(): z-menuitem. (since 3.5.0)

Author:

tomyeh

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.zkoss.zul.impl.LabelImageElement

LabelImageElement.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

Menuitem()

Menuitem(java.lang.String label)

Menuitem(java.lang.String label, java.lang.String src)

Method Summary

void	beforeParentChanged(Component parent) Default: does nothing.
java.lang.Object	clone() Clones the component.
java.lang.String	getAutodisable() Returns a list of component IDs that shall be disabled when the user clicks this menuitem.
java.lang.String	getHref() Returns the href.
java.lang.String	getTarget() Returns the target frame or window.
java.lang.String	getUpload() Returns non-null if this button is used for file upload, or null otherwise.
java.lang.String	getValue() Returns the value.
java.lang.String	getZclass() Returns the ZK Cascading Style class(es) for this component.
boolean	isAutocheck() Returns whether the menuitem check mark will update each time the menu item is selected.
boolean	isChecked() Returns whether it is checked.
boolean	isCheckmark() Returns whether the check mark shall be displayed in front of each item.
protected boolean	isChildable() Not childable.
boolean	isDisabled() Returns whether it is disabled.
boolean	isTopmost() Returns whether this is an top-level menu, i.e., not owning by another Menupopup.
protected void	renderCrawlable(java.lang.String label) Renders the crawlable information.
protected void	renderProperties(ContentRenderer renderer) Renders the content of this component, excluding the enclosing tags and children.
void	service(AuRequest request, boolean everError) Processes an AU request.
void	setAutocheck(boolean autocheck) Sets whether the menuitem check mark will update each time the menu item is selected.
void	setAutodisable(java.lang.String autodisable) Sets a list of component IDs that shall be disabled when the user clicks this menuitem.
void	setChecked(boolean checked) Sets whether it is checked.
void	setCheckmark(boolean checkmark) Sets whether the check mark shall be displayed in front of each item.
void	setDisabled(boolean disabled) Sets whether it is disabled.
void	setHref(java.lang.String href) Sets the href.
void	setTarget(java.lang.String target) Sets the target frame or window.
void	setUpload(java.lang.String upload) Sets the JavaScript class at the client to handle the upload if this button is used for file upload.
void	setValue(java.lang.String value) Sets the value.
protected void	updateByClient(java.lang.String name, java.lang.Object value) Called when the widget running at the client asks the server to update a value.

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

getExtraCtrl, getHoverImage, getHoverImageContent, getIconSclass, getImage, getImageContent, getSrc, isImageAssigned, setHoverImage, setHoverImageContent, setHoverImageContent, setIconSclass, setImage, setImageContent, setImageContent, setSrc

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

getLabel, setLabel

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

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

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

focus, getAction, getDraggable, getDroppable, getHeight, getHflex, getLeft, getRenderdefer, getSclass, getStyle, getTooltiptext, getTop, getVflex, getWidth, getZindex, getZIndex, 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, addRedrawCallback, addScopeListener, addShadowRoot, addShadowRootBefore, addSharedEventHandlerMap, appendChild, applyProperties, beforeChildAdded, beforeChildRemoved, 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, 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, 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, updateSubBindingAnnotationCount, willPassivate, willPassivate, willSerialize, willSerialize

Methods inherited from class java.lang.Object

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

Constructor Detail

Menuitem

public Menuitem()

Menuitem

public Menuitem(java.lang.String label)

Menuitem

public Menuitem(java.lang.String label,
                java.lang.String src)

Method Detail

isCheckmark

public boolean isCheckmark()

Returns whether the check mark shall be displayed in front of each item.

Default: false.

Since:

3.5.0

setCheckmark

public void setCheckmark(boolean checkmark)

Sets whether the check mark shall be displayed in front of each item.

Note the checkbox can be checked only if isAutocheck() is true

Since:

3.5.0

getZclass

public java.lang.String getZclass()

Description copied from class: HtmlBasedComponent

Returns the ZK Cascading Style class(es) for this component. It usually depends on the implementation of the mold (AbstractComponent.getMold()).

Default: null (the default value depends on element).

HtmlBasedComponent.setZclass(java.lang.String)) will completely replace the default style of a component. In other words, the default style of a component is associated with the default value of HtmlBasedComponent.getZclass(). Once it is changed, the default style won't be applied at all. If you want to perform small adjustments, use HtmlBasedComponent.setSclass(java.lang.String) instead.

Overrides:

getZclass in class HtmlBasedComponent

See Also:

HtmlBasedComponent.getSclass()

setDisabled

public void setDisabled(boolean disabled)

Sets whether it is disabled.

Specified by:

setDisabled in interface Disable

Since:

3.0.1

isDisabled

public boolean isDisabled()

Returns whether it is disabled.

Default: false.

Specified by:

isDisabled in interface Disable

Since:

3.0.1

getAutodisable

public java.lang.String getAutodisable()

Returns a list of component IDs that shall be disabled when the user clicks this menuitem.

Since:

5.0.7

setAutodisable

public void setAutodisable(java.lang.String autodisable)

Sets a list of component IDs that shall be disabled when the user clicks this menuitem.

To represent the menuitem itself, the developer can specify self. For example, <menuitem id="ok" autodisable="self,cancel"/> is the same as <menuitem id="ok" autodisable="ok,cancel"/> that will disable both the ok and cancel menuitem when an user clicks it.

The menuitem being disabled will be enabled automatically once the client receives a response from the server. In other words, the server doesn't notice if a menuitem is disabled with this method.

However, if you prefer to enable them later manually, you can prefix with '+'. For example, <menuitem id="ok" autodisable="+self,+cancel"/>

Then, you have to enable them manually such as

if (something_happened){
  ok.setDisabled(false);
  cancel.setDisabled(false);

Default: null.

Since:

5.0.7

getValue

public java.lang.String getValue()

Returns the value.

Default: "".

setValue

public void setValue(java.lang.String value)

Sets the value.

isChecked

public boolean isChecked()

Returns whether it is checked.

Default: false.

setChecked

public void setChecked(boolean checked)

Sets whether it is checked.

This only applies when isCheckmark() = true. (since 3.5.0)

isAutocheck

public boolean isAutocheck()

Returns whether the menuitem check mark will update each time the menu item is selected.

Default: false.

setAutocheck

public void setAutocheck(boolean autocheck)

Sets whether the menuitem check mark will update each time the menu item is selected.

This only applies when isCheckmark() = true. (since 3.5.0)

getHref

public java.lang.String getHref()

Returns the href.

Default: null. If null, the button has no function unless you specify the onClick handler.

setHref

public void setHref(java.lang.String href)
             throws WrongValueException

Sets the href.

Throws:

WrongValueException

getTarget

public java.lang.String getTarget()

Returns the target frame or window.

Note: it is useful only if href (setHref(java.lang.String)) is specified (i.e., use the onClick listener).

Default: null.

setTarget

public void setTarget(java.lang.String target)

Sets the target frame or window.

Parameters:

target - the name of the frame or window to hyperlink.

isTopmost

public boolean isTopmost()

Returns whether this is an top-level menu, i.e., not owning by another Menupopup.

getUpload

public java.lang.String getUpload()

Returns non-null if this button is used for file upload, or null otherwise. Refer to setUpload(java.lang.String) for more details.

Since:

5.0.0

setUpload

public void setUpload(java.lang.String upload)

Sets the JavaScript class at the client to handle the upload if this button is used for file upload.

Default: null.

For example, the following example declares a button for file upload:

<button label="Upload" upload="true"
 onUpload="handle(event.media)"/>

As shown above, after the file is uploaded, an instance of UploadEvent is sent this component.

If you want to customize the handling of the file upload at the client, you can specify a JavaScript class when calling this method: <button upload="foo.Upload"/>

Another options for the upload can be specified as follows:

<button label="Upload" upload="true,maxsize=-1,native"

• maxsize: the maximal allowed upload size of the component, in kilobytes, or a negative value if no limit.
• native: Sets whether to treat the uploaded file(s) as binary, i.e., not to convert it to image, audio or text files.

Parameters:

upload - a JavaScript class to handle the file upload at the client, or "true" if the default class is used, or null or "false" to disable the file download (and then this button behaves like a normal button).

Since:

5.0.0

beforeParentChanged

public void beforeParentChanged(Component parent)

Description copied from class: AbstractComponent

Default: does nothing.

Specified by:

beforeParentChanged in interface ComponentCtrl

Overrides:

beforeParentChanged in class AbstractComponent

Parameters:

parent - the new parent. If null, it means detachment.

See Also:

ComponentCtrl.beforeParentChanged(org.zkoss.zk.ui.Component)

clone

public java.lang.Object clone()

Description copied from interface: Component

Clones the component. All of its children and descendants are cloned. Also, ID are preserved.

Specified by:

clone in interface Component

Overrides:

clone in class LabelImageElement

Returns:

the new component. Notice that it doesn't belong to any page, nor desktop. It doesn't have a parent, either.

isChildable

protected boolean isChildable()

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 LabelImageElement

Throws:

java.io.IOException

renderCrawlable

protected void renderCrawlable(java.lang.String label)
                        throws java.io.IOException

Description copied from class: LabelElement

Renders the crawlable information. It is called by LabelElement.renderProperties(org.zkoss.zk.ui.sys.ContentRenderer), and designed to be overridden if the deriving class wants to generate it differently.

Default: org.zkoss.zul.impl.Utils.renderCrawlableText(label)

Overrides:

renderCrawlable in class LabelElement

Throws:

java.io.IOException

service

public void service(AuRequest request,
                    boolean everError)

Processes an AU request.

Default: in addition to what are handled by HtmlBasedComponent.service(org.zkoss.zk.au.AuRequest, boolean), it also handles onCheck.

Specified by:

service in interface ComponentCtrl

Overrides:

service in class HtmlBasedComponent

everError - whether any error ever occurred before processing this request.

Since:

5.0.0

See Also:

AbstractComponent.setAuService(org.zkoss.zk.au.AuService)

updateByClient

protected void updateByClient(java.lang.String name,
                              java.lang.Object value)

Description copied from class: AbstractComponent

Called when the widget running at the client asks the server to update a value. The update is caused by an AU request named setAttr (by invoking zk.Widget's smartUpdate at client).

By default, it does nothing but log a warning message, since it is not safe to allow the client to update a field arbitrary.

However, if you'd like to allow the update for a particular component you could do one of the following

1. For component developers: override this method to update the field directly. For example,
   

   protected void updateByClient(String name, Object value) {
           if ("disabled".equals(name))
                   setDisabled(name, ((Boolean)value).booleanValue());
           else
                   super.updateByClient(name, value);

2. For application developers: set an attribute called org.zkoss.zk.ui.updateByClient to be true. Then, this method will use reflection to find out the setter to update the value. Nothing happens if the method is not found.

Notice: this method will invoke AbstractComponent.disableClientUpdate(boolean) to disable any update to the client, when calling the setter.

If you want to enable the client update for all instances of a given component (though not recommended for the security reason), you could refer to here.

See also zk.Widget.smartUpdate().

Overrides:

updateByClient in class AbstractComponent