Examples of org.apache.wicket.ajax.form.OnChangeAjaxBehavior

org.apache.wicket.ajax.form.OnChangeAjaxBehavior
A behavior that updates the hosting {@link FormComponent} via Ajax when value of the component ischanged.
This behavior uses best available method to track changes on different types of form components. To accomplish this for text input form components it uses a custom event, named 'inputchange', that is handled in the best way for the specific browser. For other form component types the 'change' event is used.
@author Janne Hietamäki (janne) @since 1.3 @see org.apache.wicket.ajax.form.AjaxFormComponentUpdatingBehavior#onUpdate(org.apache.wicket.ajax.AjaxRequestTarget) @see org.apache.wicket.ajax.form.AjaxFormComponentUpdatingBehavior#onError(org.apache.wicket.ajax.AjaxRequestTarget,RuntimeException)

        Form form = new Form<Serializable>("form", new CompoundPropertyModel(rule));
        add(form);
        form.add(new EmptyRolesValidator());
        
        form.add(serviceChoice = new DropDownChoice<String>("service", getServiceNames()));
        serviceChoice.add(new OnChangeAjaxBehavior() {
            @Override
            protected void onUpdate(AjaxRequestTarget target) {
                methodChoice.updateModel();
                target.addComponent(methodChoice);
            }

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    private void makeNamespaceSyncUpWithWorkspace(final Form paramsForm) {


        // do not allow the namespace choice to be manually changed
        final DropDownChoice wsDropDown = (DropDownChoice) workspacePanel.getFormComponent();
        // add an ajax onchange behaviour that keeps ws and ns in synch
        wsDropDown.add(new OnChangeAjaxBehavior() {
            private static final long serialVersionUID = 1L;
            private NamespaceParamModel namespaceModel;
            private NamespacePanel namespacePanel;
            private boolean namespaceLookupOccurred;

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                new RangeValidator<Integer>(1, 128));
        maxConnections.setOutputMarkupId(true);
        maxConnections.setEnabled(useHttpConnectionPoolModel.getObject());
        form.add(maxConnections);


        useConnectionPooling.getFormComponent().add(new OnChangeAjaxBehavior() {


            @Override
            protected void onUpdate(AjaxRequestTarget target) {
                boolean enabled = useHttpConnectionPoolModel.getObject();
                maxConnections.setEnabled(enabled);

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        // behavior phase
        configs.setVisible(createLayer.getModelObject());
        setValidating(createLayer.getModelObject());


        createLayer.add(new OnChangeAjaxBehavior() {
            private static final long serialVersionUID = 1L;


            @Override
            protected void onUpdate(AjaxRequestTarget target) {
                final boolean createTileLayer = createLayer.getModelObject().booleanValue();

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                maxCachedLevel.setEnabled(gridsetExists);
                item.add(maxCachedLevel);


                for (ZoomLevelDropDownChoice dropDown : Arrays.asList(zoomStart, zoomStop,
                        minCachedLevel, maxCachedLevel)) {
                    dropDown.add(new OnChangeAjaxBehavior() {
                        private static final long serialVersionUID = 1L;


                        // cascades to zoomStop, min and max cached levels
                        @Override
                        protected void onUpdate(AjaxRequestTarget target) {

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        form.add(new TextField<String>("patternString"));
        form.add(new CheckBox("disabled"));
        form.add(new CheckBox("allowSessionCreation"));
        form.add(new CheckBox("requireSSL"));
        form.add(new CheckBox("matchHTTPMethod").add(
                new OnChangeAjaxBehavior() {
                @Override
                protected void onUpdate(AjaxRequestTarget target) {
                    for (CheckBox cb : methodList) {
                        cb.setEnabled(chainWrapper.isMatchHTTPMethod());
                        target.addComponent(cb);

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    Component defaultStyleCheckbox(String id, IModel itemModel) {
        final LayerGroupEntry entry = (LayerGroupEntry) itemModel.getObject();
        Fragment f = new Fragment(id, "defaultStyle", this);
        CheckBox ds = new CheckBox("checkbox", new Model(entry.isDefaultStyle()));
        ds.add(new OnChangeAjaxBehavior() {
            
            @Override
            protected void onUpdate(AjaxRequestTarget target) {
                Boolean useDefault = (Boolean) getComponent().getDefaultModelObject();
                entry.setDefaultStyle(useDefault);

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        form.add(name);


        final DropDownChoice<LayerGroupInfo.Mode> modeChoice = new DropDownChoice<LayerGroupInfo.Mode>("mode", new LayerGroupModeModel(), new LayerGroupModeChoiceRenderer());
        modeChoice.setNullValid(false);
        modeChoice.setRequired(true);
        modeChoice.add(new OnChangeAjaxBehavior() {
            @Override
            protected void onUpdate(AjaxRequestTarget target) {
                LayerGroupInfo.Mode mode = modeChoice.getModelObject();
                updateRootLayerPanel(mode);
                target.addComponent(rootLayerPanelContainer);

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    public UserGroupServicePanel(String id, IModel<T> model) {
        super(id, model);


        
        add(new PasswordEncoderChoice("passwordEncoderName").add(new OnChangeAjaxBehavior() {
            @Override
            protected void onUpdate(AjaxRequestTarget target) {
                if (recodeCheckBox.isVisible()) {
                    recodeCheckBox.setEnabled(true);
                    target.addComponent(recodeCheckBox);

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        final WebMarkupContainer configs = new WebMarkupContainer("configs");
        configs.setOutputMarkupId(true);
        configs.setVisible(autoCacheLayersModel.getObject().booleanValue());
        container.add(configs);


        autoCacheLayers.add(new OnChangeAjaxBehavior() {
            private static final long serialVersionUID = 1L;


            @Override
            protected void onUpdate(AjaxRequestTarget target) {
                final boolean visibleConfigs = autoCacheLayers.getModelObject().booleanValue();

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