Module org.apache.wicket.core

Package org.apache.wicket.markup.html.form

Class ListMultipleChoice<T>

java.lang.Object

org.apache.wicket.Component

org.apache.wicket.MarkupContainer

org.apache.wicket.markup.html.WebMarkupContainer

org.apache.wicket.markup.html.form.LabeledWebMarkupContainer

org.apache.wicket.markup.html.form.FormComponent<T>

org.apache.wicket.markup.html.form.AbstractChoice<Collection<T>,T>

org.apache.wicket.markup.html.form.ListMultipleChoice<T>

Type Parameters:

T - The model object type

All Implemented Interfaces:

Serializable, Iterable<Component>, IEventSink, IEventSource, IFeedbackContributor, IConverterLocator, IGenericComponent<Collection<T>,FormComponent<Collection<T>>>, IMetadataContext<Serializable,Component>, IFormModelUpdateListener, IFormVisitorParticipant, ILabelProvider<String>, IHeaderContributor, IRequestableComponent, IHierarchical<Component>, IClusterable

Direct Known Subclasses:

CheckBoxMultipleChoice

public class ListMultipleChoice<T>
extends AbstractChoice<Collection<T>,T>

A multiple choice list component.

Author:

Jonathan Locke, Johan Compagner, Martijn Dashorst

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.wicket.markup.html.form.AbstractChoice

AbstractChoice.LabelPosition

Field Summary

Fields inherited from class org.apache.wicket.markup.html.form.FormComponent

FLAG_CONVERT_EMPTY_INPUT_STRING_TO_NULL, VALUE_SEPARATOR

Fields inherited from class org.apache.wicket.Component

ENABLE, FLAG_INITIALIZED, FLAG_RESERVED1, FLAG_RESERVED2, FLAG_RESERVED3, FLAG_RESERVED4, FLAG_RESERVED5, FLAG_RESERVED8, PARENT_PATH, PATH_SEPARATOR, RENDER, RFLAG_CONTAINER_DEQUEING, RFLAG_CONTAINER_HAS_REMOVALS

Constructor Summary

Constructors

Constructor	Description
ListMultipleChoice(String id)
ListMultipleChoice(String id, List<? extends T> choices)
ListMultipleChoice(String id, List<? extends T> choices, int maxRows)	Creates a multiple choice list with a maximum number of visible rows.
ListMultipleChoice(String id, List<? extends T> choices, IChoiceRenderer<? super T> renderer)
ListMultipleChoice(String id, IModel<? extends Collection<T>> object, List<? extends T> choices)
ListMultipleChoice(String id, IModel<? extends Collection<T>> object, List<? extends T> choices, IChoiceRenderer<? super T> renderer)
ListMultipleChoice(String id, IModel<? extends Collection<T>> model, IModel<? extends List<? extends T>> choices)
ListMultipleChoice(String id, IModel<? extends Collection<T>> model, IModel<? extends List<? extends T>> choices, IChoiceRenderer<? super T> renderer)
ListMultipleChoice(String id, IModel<? extends List<? extends T>> choices)
ListMultipleChoice(String id, IModel<? extends List<? extends T>> choices, IChoiceRenderer<? super T> renderer)

Method Summary

Modifier and Type	Method	Description
protected List<T>	convertChoiceIdsToChoices(String[] ids)	Converts submitted choice ids to choice objects.
protected Collection<T>	convertValue(String[] ids)	Subclasses should overwrite this if the conversion is not done through the type field and the IConverter.
final String	getModelValue()
boolean	isRetainDisabledSelected()	If true, choices that were selected in the model but disabled in rendering will be retained in the model after a form submit.
protected final boolean	isSelected(T choice, int index, String selected)	Gets whether the given value represents the current selection.
protected void	onComponentTag(ComponentTag tag)	Processes the component tag.
final ListMultipleChoice<T>	setMaxRows(int maxRows)	Sets the number of visible rows in the listbox.
ListMultipleChoice<T>	setRetainDisabledSelected(boolean retain)
void	updateModel()	See FormComponent.updateCollectionModel(FormComponent) for details on how the model is updated.

Methods inherited from class org.apache.wicket.markup.html.form.AbstractChoice

appendOptionHtml, detachModel, escapeOptionHtml, getChoiceRenderer, getChoices, getChoicesModel, getDefaultChoice, isDisabled, localizeDisplayValues, onComponentTagBody, onDetach, setChoiceRenderer, setChoices, setChoices, setOptionAttributes, setType

Methods inherited from class org.apache.wicket.markup.html.form.FormComponent

add, add, checkRequired, clearInput, convertInput, error, getConvertedInput, getDefaultLabel, getDefaultLabel, getForm, getInput, getInputAsArray, getInputName, getParameterValues, getRawInput, getType, getValidatorKeyPrefix, getValidators, getValue, hasRawInput, inputAsInt, inputAsInt, inputAsIntArray, inputChanged, internalOnModelChanged, invalid, isInputNullable, isMultiPart, isRequired, isValid, newValidatable, newValidationError, onBeforeRender, onDisabled, onInvalid, onValid, processChildren, processInput, remove, reportRequiredError, setConvertedInput, setLabel, setModelValue, setRequired, shouldTrimInput, trim, updateAutoLabels, updateAutoLabels, updateCollectionModel, valid, validate, validateRequired, validateValidators, visitComponentsPostOrder, visitFormComponentsPostOrder

Methods inherited from class org.apache.wicket.markup.html.form.LabeledWebMarkupContainer

getLabel

Methods inherited from class org.apache.wicket.markup.html.WebMarkupContainer

getWebApplication, getWebPage, getWebRequest, getWebResponse, getWebSession

Methods inherited from class org.apache.wicket.MarkupContainer

add, addDequeuedComponent, addOrReplace, autoAdd, canDequeueTag, contains, dequeue, dequeue, dequeuePreamble, findChildComponent, findComponentToDequeue, get, getAssociatedMarkup, getAssociatedMarkupStream, getMarkup, getMarkupType, getRegionMarkup, internalAdd, internalInitialize, iterator, iterator, newDequeueContext, onInitialize, onRender, queue, remove, remove, removeAll, renderAll, renderAssociatedMarkup, renderNext, replace, setDefaultModel, size, stream, streamChildren, toString, toString, visitChildren, visitChildren

Methods inherited from class org.apache.wicket.Component

add, addStateChange, beforeRender, canCallListener, canCallListenerAfterExpiry, checkComponentTag, checkComponentTagAttribute, checkHierarchyChange, clearOriginalDestination, configure, continueToOriginalDestination, createConverter, debug, detach, detachModels, determineVisibility, error, exceptionMessage, fatal, findMarkupStream, findPage, findParent, findParentWithAssociatedMarkup, getAjaxRegionMarkupId, getApplication, getBehaviorById, getBehaviorId, getBehaviors, getBehaviors, getClassRelativePath, getConverter, getDefaultModel, getDefaultModelObject, getDefaultModelObjectAsString, getDefaultModelObjectAsString, getEscapeModelStrings, getFeedbackMessages, getFlag, getId, getInnermostModel, getInnermostModel, getLocale, getLocalizer, getMarkup, getMarkupAttributes, getMarkupId, getMarkupId, getMarkupIdFromMarkup, getMarkupIdImpl, getMarkupSourcingStrategy, getMarkupTag, getMetaData, getModelComparator, getOutputMarkupId, getOutputMarkupPlaceholderTag, getPage, getPageRelativePath, getParent, getPath, getRenderBodyOnly, getRequest, getRequestCycle, getRequestFlag, getResponse, getSession, getSizeInBytes, getStatelessHint, getString, getString, getString, getStyle, getVariation, hasBeenRendered, hasErrorMessage, hasFeedbackMessage, info, initModel, internalRenderComponent, internalRenderHead, isActionAuthorized, isAuto, isBehaviorAccepted, isEnableAllowed, isEnabled, isEnabledInHierarchy, isIgnoreAttributeModifier, isInitialized, isRenderAllowed, isRendering, isStateless, isVersioned, isVisibilityAllowed, isVisible, isVisibleInHierarchy, markRendering, modelChanged, modelChanging, newMarkupSourcingStrategy, onAfterRender, onConfigure, onEvent, onModelChanged, onModelChanging, onReAdd, onRemove, redirectToInterceptPage, remove, remove, render, renderComponentTag, rendered, renderHead, renderPart, renderPlaceholderTag, replaceComponentTagBody, replaceWith, sameInnermostModel, sameInnermostModel, send, setAuto, setDefaultModelObject, setEnabled, setEscapeModelStrings, setFlag, setIgnoreAttributeModifier, setMarkup, setMarkupId, setMarkupIdImpl, setMetaData, setOutputMarkupId, setOutputMarkupPlaceholderTag, setParent, setRenderBodyOnly, setResponsePage, setResponsePage, setResponsePage, setVersioned, setVisibilityAllowed, setVisible, success, urlFor, urlFor, urlFor, urlForListener, urlForListener, visitParents, visitParents, warn, wrap

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.wicket.IGenericComponent

getDefaultModel, getDefaultModelObject, getModel, getModelObject, setDefaultModel, setDefaultModelObject, setModel, setModelObject

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Details

ListMultipleChoice

public ListMultipleChoice(String id)

See Also:

• AbstractChoice(String)

ListMultipleChoice

public ListMultipleChoice(String id,
 List<? extends T> choices)

See Also:

• AbstractChoice(String, List)

ListMultipleChoice

public ListMultipleChoice(String id,
 List<? extends T> choices,
 int maxRows)

Creates a multiple choice list with a maximum number of visible rows.

Parameters:

id - component id

choices - list of choices

maxRows - the maximum number of visible rows.

See Also:

• AbstractChoice(String, List)

ListMultipleChoice

public ListMultipleChoice(String id,
 List<? extends T> choices,
 IChoiceRenderer<? super T> renderer)

See Also:

• AbstractChoice(String, List,IChoiceRenderer)

ListMultipleChoice

public ListMultipleChoice(String id,
 IModel<? extends Collection<T>> object,
 List<? extends T> choices)

Parameters:

id -

object -

choices -

See Also:

• AbstractChoice(String, IModel, List)

ListMultipleChoice

public ListMultipleChoice(String id,
 IModel<? extends Collection<T>> object,
 List<? extends T> choices,
 IChoiceRenderer<? super T> renderer)

Parameters:

id -

object -

choices -

renderer -

See Also:

• AbstractChoice(String, IModel, List,IChoiceRenderer)

ListMultipleChoice

public ListMultipleChoice(String id,
 IModel<? extends List<? extends T>> choices)

See Also:

• AbstractChoice(String, IModel)

ListMultipleChoice

public ListMultipleChoice(String id,
 IModel<? extends Collection<T>> model,
 IModel<? extends List<? extends T>> choices)

Parameters:

id -

model -

choices -

See Also:

• AbstractChoice(String, IModel,IModel)

ListMultipleChoice

public ListMultipleChoice(String id,
 IModel<? extends List<? extends T>> choices,
 IChoiceRenderer<? super T> renderer)

See Also:

• AbstractChoice(String, IModel,IChoiceRenderer)

ListMultipleChoice

public ListMultipleChoice(String id,
 IModel<? extends Collection<T>> model,
 IModel<? extends List<? extends T>> choices,
 IChoiceRenderer<? super T> renderer)

Parameters:

id -

model -

choices -

renderer -

See Also:

• AbstractChoice(String, IModel, IModel,IChoiceRenderer)

Method Details

setMaxRows

public final ListMultipleChoice<T> setMaxRows(int maxRows)

Sets the number of visible rows in the listbox.

Parameters:

maxRows - the number of visible rows

Returns:

this

getModelValue

public final String getModelValue()

Overrides:

getModelValue in class FormComponent<Collection<T>>

Returns:

Value to return when model value is needed

See Also:

• FormComponent.getModelValue()

isSelected

protected final boolean isSelected(T choice,
 int index,
 String selected)

Description copied from class: AbstractChoice

Gets whether the given value represents the current selection.

Specified by:

isSelected in class AbstractChoice<Collection<T>,T>

Parameters:

choice - The object to check

index - The index in the choices collection this object is in.

selected - The currently selected string value

Returns:

Whether the given value represents the current selection

See Also:

• AbstractChoice.isSelected(Object,int, String)

onComponentTag

protected void onComponentTag(ComponentTag tag)

Description copied from class: FormComponent

Processes the component tag.

Overrides:

onComponentTag in class FormComponent<Collection<T>>

Parameters:

tag - Tag to modify

See Also:

• Component.onComponentTag(ComponentTag)

convertValue

protected Collection<T> convertValue(String[] ids)
                              throws ConversionException

Description copied from class: FormComponent

Subclasses should overwrite this if the conversion is not done through the type field and the IConverter. WARNING: this method may be removed in future versions. If conversion fails then a ConversionException should be thrown

Overrides:

convertValue in class FormComponent<Collection<T>>

Parameters:

ids - The value can be the getInput() or through a cookie

Returns:

The converted value. default returns just the given value

Throws:

ConversionException - If input can't be converted

See Also:

• FormComponent.convertValue(String[])

convertChoiceIdsToChoices

protected List<T> convertChoiceIdsToChoices(String[] ids)

Converts submitted choice ids to choice objects.

Parameters:

ids - choice ids. this array is nonnull and always contains at least one id.

Returns:

list of choices.

updateModel

public void updateModel()

See FormComponent.updateCollectionModel(FormComponent) for details on how the model is updated.

Specified by:

updateModel in interface IFormModelUpdateListener

Overrides:

updateModel in class FormComponent<Collection<T>>

isRetainDisabledSelected

public boolean isRetainDisabledSelected()

If true, choices that were selected in the model but disabled in rendering will be retained in the model after a form submit. Example: Choices are [1, 2, 3, 4]. Model collection is [2, 4]. In rendering, choices 2 and 3 are disabled (AbstractChoice.isDisabled(Object, int, String)). That means that four checkboxes are rendered, checkboxes 2 and 4 are checked, but 2 and 3 are not clickable. User checks 1 and unchecks 4. If this flag is off, the model will be updated to [1]. This is because the browser does not re-submit a disabled checked checkbox: it only submits [1]. Therefore Wicket will only see the [1] and update the model accordingly. If you set this flag to true, Wicket will check the model before updating to find choices that were selected but disabled. These choices will then be retained, leading to a new model value of [1, 2] as (probably) expected by the user. Note that this will lead to additional calls to AbstractChoice.isDisabled(Object, int, String).

Returns:

flag

setRetainDisabledSelected

public ListMultipleChoice<T> setRetainDisabledSelected(boolean retain)

Parameters:

retain - flag

Returns:

this

See Also:

• isRetainDisabledSelected()