gwt动态添加文本框

发布于 2024-10-02 16:40:52 字数 315 浏览 3 评论 0原文

 @UiHandler("addDynamicTextboxbutton")
  void addMoreTextbox(ClickEvent event) {


     textboxplaceholder.add(new TextBox(),"textboxplace");

 }

当单击 addDynamicTextboxbutton 按钮时，将执行此方法并创建新的文本框。如何有另一个按钮，以便单击时，将从每个“textbox()”获取所有值？或者是否有必要输入名称“新文本框（“名称”）”以便我可以获得它们的所有值？执行此操作的最佳实践方法是什么？

原文

 @UiHandler("addDynamicTextboxbutton")
  void addMoreTextbox(ClickEvent event) {


     textboxplaceholder.add(new TextBox(),"textboxplace");

 }

when addDynamicTextboxbutton button is clicked, this method is executed and new textbox is created. how to have another button, so that when click, will get all the values from each of the "textbox()" ? or is it necessary to put name "new textbox("name")" so that i can get all their values? what is the best practice way to do this?

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无畏 2024-10-09 16:40:52

如果 textboxplaceholder 是 ComplexPanel 的扩展，例如 FlowPanel，您可以简单地迭代 FlowPanel 的子级:

for (Widget w: textboxplaceholder) {
   if (w instanceof TextBox) {
     // do something value: ((TextBox)w).getValue();
   }
}

If textboxplaceholder is and extend of a ComplexPanel, for example FlowPanel you could simply iterate over the children of the FlowPanel:

for (Widget w: textboxplaceholder) {
   if (w instanceof TextBox) {
     // do something value: ((TextBox)w).getValue();
   }
}

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我早已燃尽 2024-10-09 16:40:52

您可以使用集合来存储新添加的 TextBox，稍后您可以从中获取所有值。像这样的事情：

public class Test extends Composite {

    private static TestUiBinder uiBinder = GWT.create(TestUiBinder.class);

    interface TestUiBinder extends UiBinder<Widget, Test> {}

    @UiField
    FlowPanel textboxplaceholder;
    @UiField
    Button addDynamicTextboxbutton;
    private LinkedList<TextBox> boxes;

    public Test() {
        initWidget(uiBinder.createAndBindUi(this));
        boxes = new LinkedList<TextBox>();
    }

    @UiHandler("addDynamicTextboxbutton")
    void addMoreTextbox(ClickEvent event) {
        TextBox box = new TextBox();
        textboxplaceholder.add(box);
        boxes.add(box);
    }
}

迭代存储在 boxes 中的框以获取所有值。

You could use a collection to store the newly added TextBox from which you can later get all the values. Something like this:

public class Test extends Composite {

    private static TestUiBinder uiBinder = GWT.create(TestUiBinder.class);

    interface TestUiBinder extends UiBinder<Widget, Test> {}

    @UiField
    FlowPanel textboxplaceholder;
    @UiField
    Button addDynamicTextboxbutton;
    private LinkedList<TextBox> boxes;

    public Test() {
        initWidget(uiBinder.createAndBindUi(this));
        boxes = new LinkedList<TextBox>();
    }

    @UiHandler("addDynamicTextboxbutton")
    void addMoreTextbox(ClickEvent event) {
        TextBox box = new TextBox();
        textboxplaceholder.add(box);
        boxes.add(box);
    }
}

Iterate over the boxes stored in boxes to get all the values.

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