Wicket - Replace Label By TextField and vice versa_问答_开发者

I am trying to replace a Label by a TextField in a ListView. I saw a similar wicket example few weeks ago over internet, but I don't remember the link. I have added AjaxEventBehavior - "onDblClick" to the ListItem by which I want to replace a Label by a TextField and also added AjaxFormComponentUpdatingBehavior - "onBlur" to the TextField such that the TextField will be replaced by Label. Somehow it is not working. The List model for the ListView contain only {"aaaaaaaaaaaaa", "bbbbbbbbbbbbbbbb", "cccccccccccccc"} [as I am testing it开发者_如何学运维] so the first Label will be "aaaaaaaaaaaaa", if I double click on this Label the TextField is appearing the place of the Label "cccccccccccccc", which is unexpected. And also the "onBlur" event is not working. Hope I can explain the problems. The code is given below:

public class TaskTypeSettingsPage extends BasePage implements Serializable {
    private String val;

    public TaskTypeSettingsPage() {
        add(new TaskTypeSettingsForm("form"));
    }

    public void setVal(String val) {
        this.val = val;
    }

    public String getVal() {
        return val;
    }

    private class TaskTypeSettingsForm extends Form {

        private static final long serialVersionUID = 10058L;
        private Fragment labelFragment;
        private Fragment textFragment;

        public TaskTypeSettingsForm(String id) {
            super(id);
            setOutputMarkupId(true);            

            ListView listView = new ListView("row", Arrays.asList("aaaaaaaaaaaaa", "bbbbbbbbbbbbbbbb", "cccccccccccccc")) {

                @Override
                protected void populateItem(ListItem item) {
                    String str = (String) item.getModelObject();
                    item.add(new Label("listLabel", str));
                    item.setOutputMarkupId(true);

                    labelFragment = new Fragment("frag", "labelFragment", this.getPage());
                    Label label = new Label("label", str);
                    label.setOutputMarkupId(true);
                    labelFragment.setOutputMarkupId(true);
                    labelFragment.add(label);
                    item.add(labelFragment);

                    textFragment = new Fragment("frag", "textFragment", this.getPage());
                    TextField text = new TextField("text", new PropertyModel(TaskTypeSettingsPage.this, "val"));
                    text.setOutputMarkupId(true);
                    textFragment.setOutputMarkupId(true);
                    textFragment.add(text);

                    item.add(new AjaxEventBehavior("onDblClick") {

                        @Override
                        protected void onEvent(AjaxRequestTarget target) {
                                labelFragment.replaceWith(textFragment);
                            labelFragment = textFragment;
                            target.addComponent(textFragment);
                        }
                    });
                    text.add(new AjaxFormComponentUpdatingBehavior("onBlur") {

                        @Override
                        protected void onUpdate(AjaxRequestTarget target) {
                            textFragment.replaceWith(labelFragment);
                            textFragment = labelFragment;
                            target.addComponent(labelFragment);
                        }
                    });
                }
            };
            add(listView);
        }       
    }
}

And

<html>
<body>
<wicket:extend>
<div class="heading"><wicket:message key="extras.taskType" /></div>
<form wicket:id="form" autocomplete="off">
<table>
    <tr wicket:id="row">
        <td>
        <span wicket:id="frag"></span>
    </td>
</tr>
</table>

<wicket:fragment wicket:id="labelFragment"><span wicket:id="label"></span>
</wicket:fragment>
<wicket:fragment wicket:id="textFragment"><input type="text" wicket:id="text">
</wicket:fragment>
</form>
</wicket:extend>
</body>
</html>

Any information or example code will be very helpful to me. Thank you. Edit: I found the link: example but the source code is not available.

You can replace an entire component, but you also have to consider that the same markup might not work for both a label and a text field. But you can always replace a fragment with another fragment, so if you wrap your field and label in a fragment each, you can switch between them anytime.

However you're better off using a dedicated component for this purpose, I seem to remember an Ajax field component in either core Wicket or Wicket Extensions that did it. It is called AjaxEditableLabel

The example you are trying to remember might be this editable label example.

There is a Visural Wicket library that has ViewOrEdit component. It sounds something like you are looking for.

The ListView component may not be the best basis for a form. See http://wicketinaction.com/2008/10/building-a-listeditor-form-component/