使用组合框和食品标签填充Listitem，并保留每个对象的状态

Question

为了避免浪费你的时间，这是apache wicket和scala开发人员的问题，谢谢。

我已经创建了一个带有populateList方法的listView，它根据下图中的每一行填充客户会议列表和相应的经理：

这里有两个问题：

1. 创建新的新项目时，只有字段（标签）dateBegin和 dateEnd使用以前分配的值保存，我丢失了 经理 DropDownChoice 和明细的值 ListItem的最后一行中的 TextField 。
2. 更改后 退出详细信息TextField 后的 DropDownChoice 更新模型从每个字段中选择了相应的值。

因此，值仅保留在标签中，实际链接中。让我展示一下代码：

add(new ListView[Meetings]("listMeetings", listData) {
  override protected def onBeforeRender() {
  periodTotal = new Period()
  super.onBeforeRender()
}

// for populating the listView
def populateItem(item: ListItem[customer]) = {
    var customer = item.getModelObject()

    item.add(new LinkDate("beginDate", customer))
    item.add(new LinkDate("endDate", customer))

    val listManagers: java.util.List[Manager] = managerDAO.listManagers
    item.add(new DropDownChoice("managerSelection", listManagers,new ChoiceRenderer[Manager]("name")))

    item.add(new TextField("detail"))

    /*
     * I tried to use the code bellow but it's cause a markups errors too.
     * Only the code above display the components without errors.
     */  
    //val managerSelection = new LinkManager("managerSelection",customer)
    //item.add(managerSelection)
    //item.add(new LinkDetail("detail",  customer))

    var period = new Period(customer.beginDate, customer.endDate.get)
    item.add(new Label("total", period.toString(getFormatter())))

    item.add(new LinkEdit("edit", customer))
}})

以下函数可以正常处理日期值并编辑该行的相应字段：

private class LinkDate(id: String, customer: Customer) extends Link[String](id) {

    setEnabled(false)
    add(new Label("label", new Model[String]() {
      override def getObject(): String = {
        var result = ""
        if (id == "beginDate") {
          result = customer.beginDate.toString("dd/MM/YYYY HH:mm:ss")
        }
        if (id == "endDate") {
          result = customer.endDate.get.toString("dd/MM/YYYY HH:mm:ss")
        }
        return result
      }
    }))
     // ... doing other stuff
  }

  private class LinkEdit(id: String, customer: Customer) extends Link[String](id) {

    add(new Label("label", new Model[String]() {
      override def getObject: String = "edit"
    }));
    // ... doing other stuff
  }

但对于DropDown和TextField，我试图做同样的事情而且我失败了：

  // Doesn't work
  private class LinkManager(id: String, customer: Customer) extends Link[String](id) {

    val listManagers: java.util.List[Manager] = managerDAO.listManagers
    add(new DropDownChoice("managerSelection", listManagers,new ChoiceRenderer[Manager]("name") {

      def wantOnSelectionChangedNotifications() = {
        true;
      }
      def onSelectionChanged(managerSelection: Manager): String = {
        // saving model
        })
      }
    }))

    // ... doing other stuff
  }

  // Doesn't work
  // Also here I tried to change textFiled for a inline-ajax Editable label
  // And I need the behaviour to change model imadiately after change value
  private class LinkDetail(id: String, customer: Customer) extends Link[String](id) {

    add(new AjaxEditableLabel("detail", new Model[String]() {
      override def getObject(): String = {
        // ... doing other stuff
      }
    }))
  }

下面显示了相应的标记：

<TR wicket:id="listCustomersMeetings">
  <TD><a wicket:id="beginDate"><span wicket:id="label"></span></a></TD>
  <TD><a wicket:id="endDate"><span wicket:id="label"></span></a></TD>
  <TD>
      <SELECT wicket:id="managerSelection" name="id"></SELECT>
      <BR>
  </TD>

  <TD><INPUT wicket:id="detail" type="text" name="obs" value="_"/></TD>

  <TD wicket:id="total"></TD>

  <TD><a wicket:id="edit"><span wicket:id="label" style="text-align: center"></span></a></TD>

</TR>

我认为需要一个Object，类似于LinkDate，用于处理和存储Manager DropDownChoice以及textField或AjaxEditableLabel Detail的值，但是我很难实现它们。

感谢有人帮助我或向我提供有关

的信息

Answer 1

尝试替换这些行

item.add(new DropDownChoice("managerSelection", listManagers,new ChoiceRenderer[Manager]("name")))
item.add(new TextField("detail"))

类似于：

  val managerSelectionCurrent = new PropertyModel(customer, "manager")
  val managerSelection = new DropDownChoice[Manager]("managerSelection", managerSelectionCurrent, listManagers,new ChoiceRenderer[Manager]("name")) {
    protected override def wantOnSelectionChangedNotifications: Boolean = {
      true
    }

    protected override def onSelectionChanged(newSelection: Manager) {
      // save changes
    }
  }
  item.add(managerSelection)

  val detail = new TextField("detail", new PropertyModel(customer, "details"))
  detail.add(new AjaxFormComponentUpdatingBehavior(("keyup")) {
    protected def onUpdate(target: AjaxRequestTarget) {
      // save changes
    }

    protected override def updateAjaxAttributes(attributes: AjaxRequestAttributes) {
      attributes.setThrottlingSettings(new ThrottlingSettings("thr", Duration.milliseconds(800)))
      super.updateAjaxAttributes(attributes)
    }
  })
  item.add(detail)