尝试插入与模型无关的数据会产生 null

Trying to insert data non related to model produces null

我正在尝试键入一些与基于 this example 的模型没有直接关系的数字。

我的代码

HTML:

<input data-bind="value: screenText" />
<div>
    <div>
        <div data-bind="with: '1'">
            <a data-bind="text: $data,click: $root.keyPushed" href="#"></a>
        </div>
        <div data-bind="with: '2'">
            <a data-bind="text: $data,click: $root.keyPushed"  href="#"></a>
        </div>
        <div data-bind="with: '3'">
            <a data-bind="text: $data,click: $root.keyPushed"  href="#"></a>
        </div>
    </div>
    <div>
        <div data-bind="with: '4'">
            <a data-bind="text: $data,click: $root.keyPushed"  href="#"></a>
        </div>
        <div data-bind="with: '5'">
            <a data-bind="text: $data,click: $root.keyPushed"  href="#"></a>
        </div>
        <div data-bind="with: '6'">
            <a data-bind="text: $data,click: $root.keyPushed"  href="#"></a>
        </div>
    </div>
    <div>
        <div data-bind="with: '7'">
            <a data-bind="text: $data,click: $root.keyPushed"  href="#"></a>
        </div>
        <div data-bind="with: '8'">
            <a data-bind="text: $data,click: $root.keyPushed"  href="#"></a>
        </div>
        <div data-bind="with: '9'">
            <a data-bind="text: $data,click: $root.keyPushed"   href="#"></a>
        </div>
    </div>
</div>


<a>Llamar</a>
<div data-bind="with: 'hi'">
    <a data-bind="text: $data,click: $root.keyPushed" href="#"></a>
</div>

JAVA:

package dew.demo.namesmodel;

import java.util.logging.Level;
import java.util.logging.Logger;
import net.java.html.json.Model;
import net.java.html.json.Property;
import net.java.html.json.Function;

@Model(className = "Data", properties = {
    @Property(name = "screenText", type = String.class)
})
class DataModel {
   @Function
    static void keyPushed(Data model, String keyPress) {
        System.out.println(keyPress);
        model.setScreenText(model.getScreenText()+keyPress);
    }

   static {
    Data ui = new Data();
        ui.setScreenText("1");
        ui.applyBindings();
   }

}

您可能已经注意到,我们的想法是将输入用作显示并在单击时附加键值。

¿这可能吗,还是我必须采用强制将其包含到数据模型中的方法?

提前致谢。

在您的函数中,您正在使用 with-binding 设置 $data。所以你想在你的函数中访问 $data 。这样做:

@Function
static void keyPushed(Data model, String data) {
    System.out.println(data);
    model.setScreenText(model.getScreenText()+ data);
}