org.zkoss.zkmax.zul

Class Cascader<E>

java.lang.Object

org.zkoss.zk.ui.AbstractComponent

org.zkoss.zk.ui.HtmlBasedComponent

org.zkoss.zkmax.zul.Cascader<E>

Type Parameters:

E - Element type in model

All Implemented Interfaces:

Serializable, Cloneable, org.zkoss.zk.ui.Component, org.zkoss.zk.ui.ext.Disable, org.zkoss.zk.ui.ext.Scope, org.zkoss.zk.ui.sys.ComponentCtrl

public class Cascader<E>
extends org.zkoss.zk.ui.HtmlBasedComponent
implements org.zkoss.zk.ui.ext.Disable

A Cascader is a dropdown list in tree structure, and it supports TreeModel. It does not create child widgets for each data, so the memory usage is much lower at the server.

Available in ZK EE.

Default getZclass(): z-cascader.

Since:

9.0.0

Author:

jameschu

See Also:

Serialized Form

Nested Class Summary

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

org.zkoss.zk.ui.HtmlBasedComponent.ExtraCtrl

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

org.zkoss.zk.ui.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

AFTER_CHILD_ADDED, AFTER_CHILD_REMOVED, AFTER_PAGE_ATTACHED, AFTER_PAGE_DETACHED, CE_BUSY_IGNORE, CE_DUPLICATE_IGNORE, CE_IMPORTANT, CE_NON_DEFERRABLE, CE_REPEAT_IGNORE

Constructor Summary

Constructors

Constructor and Description
Cascader()

Method Summary

Modifier and Type	Method and Description
Object	clone()
org.zkoss.util.Converter<Collection<E>,String>	getItemConverter() Returns the converter that generates the label text shown in the cascader from selected items, or null to use the default implementation.
org.zkoss.zul.ItemRenderer<E>	getItemRenderer() Returns the renderer to render each item, or null if the default renderer is used.
org.zkoss.zul.TreeModel<E>	getModel() Returns the model associated with this cascader, or null if this cascader is not associated with any tree data model.
String	getPlaceholder() Returns the placeholder text.
E	getSelectedItem() Returns the selected item.
Set<E>	getSelectedItems() Returns all selected items.
String	getZclass()
void	invalidate()
boolean	isDisabled()
boolean	isOpen() Returns whether this cascader is open.
void	onInitRender() Handles a private event, onInitRender.
void	onPageAttached(org.zkoss.zk.ui.Page newpage, org.zkoss.zk.ui.Page oldpage)
void	onPageDetached(org.zkoss.zk.ui.Page page)
protected void	renderProperties(org.zkoss.zk.ui.sys.ContentRenderer renderer)
void	service(org.zkoss.zk.au.AuRequest request, boolean everError)
void	sessionDidActivate(org.zkoss.zk.ui.Page page)
void	sessionWillPassivate(org.zkoss.zk.ui.Page page)
void	setDisabled(boolean disabled)
void	setItemConverter(org.zkoss.util.Converter<Collection<E>,String> converter) Sets the converter that generates the label text shown in the cascader from selected items.
void	setItemConverter(String clsnm) Sets the converter by use of a class name.
void	setItemRenderer(org.zkoss.zul.ItemRenderer<E> renderer) Sets the renderer which is used to render each item if getModel() is not null.
void	setItemRenderer(String clsnm) Sets the renderer by use of a class name.
void	setModel(org.zkoss.zul.TreeModel model) Sets the tree model associated with this cascader.
void	setOpen(boolean open) Drops down or closes the list of items.
void	setPlaceholder(String placeholder) Sets the placeholder text that is displayed when the selected item is empty.
void	setSelectedItem(E item) Deselects selected item and selects the given item.

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

addSclass, evalCSSFlex, focus, getAction, getDraggable, getDroppable, getExtraCtrl, getHeight, getHflex, getLeft, getPropertyAccess, getRenderdefer, getSclass, getStyle, getTabindex, getTabindexInteger, getTooltiptext, getTop, getVflex, getWidth, getZindex, getZIndex, removeSclass, removeSclass, setAction, setClass, setDraggable, setDroppable, setFocus, setHeight, setHeight0, setHeightDirectly, setHflex, setHflex0, setHflexDirectly, setLeft, setLeftDirectly, setRenderdefer, setSclass, setStyle, setTabindex, setTabindex, setTooltiptext, setTop, setTopDirectly, setVflex, setVflex0, setVflexDirectly, setWidth, setWidth0, setWidthDirectly, setZclass, setZindex, setZIndex, setZIndexDirectly

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

addAnnotation, addAnnotation, addCallback, addClientEvent, addEventHandler, addEventListener, addEventListener, addForward, addForward, addForward, addForward, addMoved, addRedrawCallback, addScopeListener, addShadowRoot, addShadowRootBefore, addSharedEventHandlerMap, appendChild, applyProperties, beforeChildAdded, beforeChildRemoved, beforeParentChanged, detach, didActivate, didActivate, didDeserialize, didDeserialize, disableBindingAnnotation, disableClientUpdate, enableBindingAnnotation, getAnnotatedProperties, getAnnotatedPropertiesBy, getAnnotation, getAnnotation, getAnnotations, getAnnotations, getAnnotations, getAttribute, getAttribute, getAttribute, getAttributeOrFellow, getAttributes, getAttributes, getAuService, getAutag, getCallback, getChildren, getClientAttribute, getClientDataAttribute, getClientEvents, getDefaultMold, getDefinition, getDesktop, getEventHandler, getEventHandlerNames, getEventListenerMap, getEventListeners, getFellow, getFellow, getFellowIfAny, getFellowIfAny, getFellows, getFirstChild, getId, getLastChild, getListenerIterator, getMold, getNextSibling, getPage, getParent, getPreviousSibling, getRedrawCallback, getRoot, getShadowFellowIfAny, getShadowRoots, getShadowVariable, 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, invalidatePartial, isChildable, isInvalidated, isListenerAvailable, isVisible, onChildAdded, onChildRemoved, onWrongValue, query, queryAll, redraw, redrawChildren, removeAttribute, removeAttribute, removeAttribute, removeCallback, removeChild, removeEventListener, removeForward, removeForward, removeRedrawCallback, removeScopeListener, removeShadowRoot, render, render, render, replace, response, response, response, service, setAttribute, setAttribute, setAttribute, setAuService, setAutag, setClientAttribute, setClientDataAttribute, 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

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

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

invalidatePartial

Constructor Detail

Cascader

public Cascader()

Method Detail

getModel

public org.zkoss.zul.TreeModel<E> getModel()

Returns the model associated with this cascader, or null if this cascader is not associated with any tree data model.

setModel

public void setModel(org.zkoss.zul.TreeModel model)

Sets the tree model associated with this cascader.

Parameters:

model - the list model to associate, or null to dis-associate any previous model. If not null, it must implement Selectable.

Throws:

org.zkoss.zk.ui.UiException - if failed to initialize with the model

onInitRender

public void onInitRender()

Handles a private event, onInitRender. It is used only for implementation, and you rarely need to invoke it explicitly.

getItemRenderer

public org.zkoss.zul.ItemRenderer<E> getItemRenderer()

Returns the renderer to render each item, or null if the default renderer is used.

setItemRenderer

public void setItemRenderer(org.zkoss.zul.ItemRenderer<E> renderer)

Sets the renderer which is used to render each item if getModel() is not null.

Note: changing a render will cause the cascader to re-render.

Parameters:

renderer - the renderer, or null to use the default.

setItemRenderer

public void setItemRenderer(String clsnm)
                     throws ReflectiveOperationException

Sets the renderer by use of a class name. It creates an instance automatically.

Parameters:

clsnm - The class name

Throws:

ReflectiveOperationException - if failed to initialize the renderer

getItemConverter

public org.zkoss.util.Converter<Collection<E>,String> getItemConverter()

Returns the converter that generates the label text shown in the cascader from selected items, or null to use the default implementation. (joining by slashes, i.g. "A/B/C")

setItemConverter

public void setItemConverter(org.zkoss.util.Converter<Collection<E>,String> converter)

Sets the converter that generates the label text shown in the cascader from selected items.

Parameters:

converter - the converter, or null to use the default implementation.

setItemConverter

public void setItemConverter(String clsnm)
                      throws ReflectiveOperationException

Sets the converter by use of a class name. It creates an instance automatically.

Parameters:

clsnm - The class name

Throws:

ReflectiveOperationException - if failed to initialize the converter

getPlaceholder

public String getPlaceholder()

Returns the placeholder text.

setPlaceholder

public void setPlaceholder(String placeholder)

Sets the placeholder text that is displayed when the selected item is empty.

isOpen

public boolean isOpen()

Returns whether this cascader is open.

Default: false.

setOpen

public void setOpen(boolean open)

Drops down or closes the list of items.

isDisabled

public boolean isDisabled()

Specified by:

isDisabled in interface org.zkoss.zk.ui.ext.Disable

setDisabled

public void setDisabled(boolean disabled)

Specified by:

setDisabled in interface org.zkoss.zk.ui.ext.Disable

getSelectedItems

public Set<E> getSelectedItems()

Returns all selected items.

getSelectedItem

public E getSelectedItem()

Returns the selected item.

setSelectedItem

public void setSelectedItem(E item)

Deselects selected item and selects the given item.

renderProperties

protected void renderProperties(org.zkoss.zk.ui.sys.ContentRenderer renderer)
                         throws IOException

Overrides:

renderProperties in class org.zkoss.zk.ui.HtmlBasedComponent

Throws:

IOException

service

public void service(org.zkoss.zk.au.AuRequest request,
                    boolean everError)

Specified by:

service in interface org.zkoss.zk.ui.sys.ComponentCtrl

Overrides:

service in class org.zkoss.zk.ui.HtmlBasedComponent

onPageAttached

public void onPageAttached(org.zkoss.zk.ui.Page newpage,
                           org.zkoss.zk.ui.Page oldpage)

Specified by:

onPageAttached in interface org.zkoss.zk.ui.sys.ComponentCtrl

Overrides:

onPageAttached in class org.zkoss.zk.ui.AbstractComponent

onPageDetached

public void onPageDetached(org.zkoss.zk.ui.Page page)

Specified by:

onPageDetached in interface org.zkoss.zk.ui.sys.ComponentCtrl

Overrides:

onPageDetached in class org.zkoss.zk.ui.AbstractComponent

invalidate

public void invalidate()

Specified by:

invalidate in interface org.zkoss.zk.ui.Component

Overrides:

invalidate in class org.zkoss.zk.ui.AbstractComponent

clone

public Object clone()

Specified by:

clone in interface org.zkoss.zk.ui.Component

Overrides:

clone in class org.zkoss.zk.ui.HtmlBasedComponent

sessionWillPassivate

public void sessionWillPassivate(org.zkoss.zk.ui.Page page)

Specified by:

sessionWillPassivate in interface org.zkoss.zk.ui.sys.ComponentCtrl

Overrides:

sessionWillPassivate in class org.zkoss.zk.ui.AbstractComponent

sessionDidActivate

public void sessionDidActivate(org.zkoss.zk.ui.Page page)

Specified by:

sessionDidActivate in interface org.zkoss.zk.ui.sys.ComponentCtrl

Overrides:

sessionDidActivate in class org.zkoss.zk.ui.AbstractComponent

getZclass

public String getZclass()

Overrides:

getZclass in class org.zkoss.zk.ui.HtmlBasedComponent