我如何动态地添加一个文本框点击一个按钮后？ [英] How can I add a textfield dynamically after clicking a button?

问题描述

任何人都可以点我在这里正确的方向。林希望有发言权2文本框最初那么用户将能够点击添加按钮，另外2个文本框将显示（这个需要是动态的，用户可以单击一次或例如100次）

Can anyone point me in the right direction here. Im wanting to have say 2 textfields initially then the user will be able to click 'add' button and another 2 textfields will be displayed (this needs to be dynamic as the user could click once or a 100 times for example)

推荐答案

由于它的小门，它应该是Java的...我会重新标记这一点，但我的帐户是新为...

Since it's wicket, it should be Java... I would retag this but my account is to new for that...

把你的初始文本框模型成一个单一的包装对象，这添加到列表（因此只包含一个元素），并显示该列表中的一个ListView。在按钮的onclick事件，另外这些包装对象添加到您的列表，并刷新ListView控件。

Put your initial Textfields models into a single wrapper-object and add this to a list (thus containing only one element) and display this list in a ListView. In the onClick Event of your Button, add another of these wrapper-objects to your list and refresh the ListView.

像

public class TwoTextFields {
    private IModel textFieldOne;
    private IModel textFieldTwo;

    [... constructor, getters setters here  ...]

和

public class MyPanel extends Panel {

   private List<TwoTextFields> list = new ArrayList<TwoTextFields>();

   public MyPanel(String id) {
       super(id);
       add( New ListView<TwoTextFields>("list", list) {

           @Override
           protected populateItem(Item<TwoTextFields> item) {
               add( new TextField("fieldOne", new PropertyModel(item, "textFieldOne");
               add( new TextField("fieldTwo", new PropertyModel(item, "textFieldTwo");
           }
      });
      add( new Button("button) {

           @Override
           protected void onClick() {
               list.add(new TwoTextFields());
           }
      });
}

我不知道这是否编译......它只是给你的想法，不想火起来蚀为...

I don't know if this compiles... It's just to give you the idea, didn't want to fire up eclipse for that...

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