GWT如何将自定义单元格添加到celltable/datagrid

Question

我已经渲染了一个自定义单元格,它结合了图像和文本.它看起来像这样:

   class ImageTextCell extends AbstractCell<String> 

我的问题是如何将此单元格添加到celltable/datagrid中.我已经厌倦了.

  Column<Message, String> iconColumn = new Column<Message, String>(new ImageTextCell())
            {
        @Override
        public String getValue(Message versionStatus) {

            return ? // I dont know what to type here. How to return the ImageTextCell object           }
    };

Answer 1

Cell对象的作用是将值转换为HTML.这个角色Column是从每一行获取该值.例如,你有一堆Messages,每一个都在它自己的行上 - 专栏应该拿a Message并找出String传递给它的内容Cell.

输出getValue将输入到输入render.输出render应该是您要在应用中看到的HTML.

伪身体,这是GWT为您做的:

for each Message in your table {
    pass the Message into Column.getValue and get out a String
    pass that String into Cell.render and get out some HTML
    add that HTML inside a <td> element in the table we're drawing
}

您只需要定义Column.getValue和Cell.render,以便此进程生成所需的表.