如何从AjaxCheckBox的onUpdate（）事件中读取列表框的PropertyModel状态 - Apache Wicket

Problem: user made some selection in the multi-selection listbox, then pressed a checkbox, and selection got lost. I need the selection to be preserved.

问题：用户在多选列表框中进行了一些选择，然后按下复选框，选择丢失。我需要保留选择。

I have a report wizard which extends (wicket.extensions.wizard.Wizard) I have a step which extends WizardStep.WizardStep On this step I have a mutli-selection box which extends wicket.markup.html.form.ListMultipleChoice I add it as follows:

我有一个扩展的报告向导（wicket.extensions.wizard.Wizard）我有一个扩展WizardStep.WizardStep的步骤在这一步我有一个mutli选择框扩展wicket.markup.html.form.ListMultipleChoice我添加为如下：


final ChooseListMultipleChoice allPlansChoiceField = new ChooseListMultipleChoice(PLANS_SELECT_ALL_PLANS_LIST, new PropertyModel(this, "selectedAllPlans"), allPlans);
allPlansChoiceField.setOutputMarkupId(true);
add(allPlansChoiceField);

and I also have AjaxCheckBox (wicket.ajax.markup.html.form.AjaxCheckBox) Used like this:

我也有AjaxCheckBox（wicket.ajax.markup.html.form.AjaxCheckBox）像这样使用：


  AjaxCheckBox displayArchived = new AjaxCheckBox(DISPLAY_ARCHIVED){
            protected void onUpdate(final AjaxRequestTarget target) {
                allPlans.clear();
                final boolean isDisplayArchived = rawReportFilterInput.isDisplayArchived();
                List listAllPlan = projectFacade.listActiveAndClosingPlans(isSort, isDisplayArchived);
                allPlans.addAll(listAllPlan);
                target.addComponent(allPlansChoiceField);
            }
        };
        add(displayArchived);

inside the onUpdate method the model "selectedAllPlans" is not updated with current user selection. For instance, if I had just a simple ajax submit buttom, then it would have triggered the onSubmit event and all form data would have been passed and "selectedAllPlans" would be populated with user selection. I need the exact same behaviour when user checks/unchecks the AjaxCheckBox. So far, I haven't been able to make it working, model is always size = 0.

在onUpdate方法中，模型“selectedAllPlans”不会使用当前用户选择进行更新。例如，如果我只有一个简单的ajax submit buttom，那么它将触发onSubmit事件并且所有表单数据都将被传递，并且“selectedAllPlans”将填充用户选择。当用户检查/取消选中AjaxCheckBox时，我需要完全相同的行为。到目前为止，我还没能使它工作，模型总是size = 0。

MarkUp:

标记：

<div class="effortsReport" style="height: 220px;">
<table>
    <tr>
        <input type="checkbox" wicket:id="plansSelect.displayArchived">
        <br><div class="fixed_select"><select wicket:id="allPlansList"/></div></td>
    </tr>
</table>
</div>

I would appreciate some advise, possible solutions. Best regards, Oleg

我会很感激一些建议，可能的解决方案。最诚挚的问候，奥列格

1 个解决方案

#1

Okay I figured it out, just do this:

好吧，我想通了，就这样做：

allPlansChoiceField.add(new AjaxFormComponentUpdatingBehavior("onchange") {
        @Override
        protected void onUpdate(AjaxRequestTarget target) {
            target.addComponent(allPlansChoiceField);
        }
    });

and that's all. You do not even need to store/restore the state, it just works. Yes it took time to find this out, but it's possible and easy in the end. Gotta love Wicket.

就这样。你甚至不需要存储/恢复状态，它只是工作。是的，需要时间才能找到它，但最终可能也很容易。一定要喜欢Wicket。

#1