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https://issues.apache.org/jira/browse/WICKET-6348?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15948582#comment-15948582
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ASF subversion and git services commented on WICKET-6348:
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Commit 01d8cffb9f8ab3c957a4aa372b53644317d6a479 in wicket's branch
refs/heads/WICKET-6348-selection-change from [~svenmeier]
[ https://git-wip-us.apache.org/repos/asf?p=wicket.git;h=01d8cff ]
WICKET-6348 renamed to FormComponentUpdatingBehavior
keep deprecated getJsForInterfaceUrl()
> extract #onSelectionChange() from choices to behavior
> -----------------------------------------------------
>
> Key: WICKET-6348
> URL: https://issues.apache.org/jira/browse/WICKET-6348
> Project: Wicket
> Issue Type: Improvement
> Components: wicket
> Affects Versions: 8.0.0-M4
> Reporter: Sven Meier
> Assignee: Sven Meier
> Priority: Minor
>
> Several form components support notification via normal HTTP request when
> their value changes in the browser:
> - CheckBox
> - DropDownChoice
> - RadioChoice
> - CheckGroup/Check
> - RadioGroup/Radio
> I propose to move support for this feature into a new behavior.
> This has the following advantages:
> - having to override #wantOnSelectionChangedNotifications() for
> #onSelectionChanged() to be triggered wasn't very intuitive
> - we minimize the API of these components (the two methods above and
> #onRequest())
> - we can simplify these components by removing from them this non-core
> concern (a legacy from the pre-Ajax era)
> - to use the feature users can add a behavior instead, to have a notification
> triggered on *that* behavior (similar to
> AjaxFormChoiceComponentUpdatingBehavior)
> I reused IFormSubmitter to submit the form (for SubmitLink too) so we can
> simplify Form now:
> - no need for the hidden field "_hf_0", used to transport the actual listener
> url - the form's action is changed instead
> - no need for #dispatchEvent(), used to schedule another request handler that
> triggers the component
> - #getJsForInterfaceUrl() is greatly simplified (renamed to
> #getJsForListenerUrl() now)
> Migration effort is manageable:
> {code}
> new CheckBox("id", model) {
> protected boolean wantOnSelectionChangedNotifications() {
> return true;
> }
> protected void onSelectionChanged(Boolean newSelection) {
> // do something, page will be rerendered;
> }
> };
> {code}
> ... becomes:
> {code}
> new CheckBox("id", model)
> .add(new SelectionChangedBehavior() {
> protected void onSelectionChanged() {
> // do something, page will be rerendered;
> }
> });
> {code}
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