HTML“getElementByID"SWT 小部件的实现 [英] HTML "getElementByID" implementation for SWT widget

问题描述

在 HTML 中，有类似 document.getElementById("button1");

In HTML, there is something like document.getElementById("button1");

我希望在我的 SWT 应用程序中发生这样的事情.

I would like something of this sort to happen in my SWT application.

假设我在运行时使用 new Button(shell, SWT.PUSH) 创建了一个 SWT 小部件有没有什么地方可以使用类似于 getElementById(...) 的东西来获取(引用)这个对象?

Say I created an SWT widget on the run with new Button(shell, SWT.PUSH) Is there anywhere I can get(reference) this object with something similar to getElementById(...)?

我正在考虑创建一个 HashMap 类型，其中 String 放置对象的 id(小部件)，然后我将调用 hashMap.getKey(id) 它将返回对对象(小部件)的引用.

I am thinking of creating a HashMap<String, Object> type, where String places the id of the object(Widget) and then I will call hashMap.getKey(id) which will return me a reference to the object(Widget).

推荐答案

您可以使用这样的方法递归检查组合的所有子项，并使用 Widget.getData()/setData() 设置一个 id:

You can recursively check all the children of a composite with a method like this one, and use Widget.getData()/setData() to set an id:

public <T extends Control> T findChild(Composite parent, String id) {
    Control found = null;
    Control[] children = parent.getChildren();
    for (int i = 0; i < children .length && found == null; i++) {
        Control child = children[i];
        if (id.equals(child.getData(ID)) {
            found = child;
        } else if (child instanceof Composite) {
            found = findChild((Composite) child, id);
        }
    }
    return (T) found ;
}

这篇关于HTML“getElementByID"SWT 小部件的实现的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！