Eclipse 偏好 - 网格布局混乱

发布于 2024-11-17 11:03:36 字数 665 浏览 8 评论 0原文

我尝试构建 Eclipse pref 页面的一部分，其中包含表格和添加/删除按钮。我找到了一些示例代码，但我不明白以下内容：

该方法

protected void adjustForNumColumns(int numColumns) {
    ((GridData)top.getLayoutData()).horizontalSpan = numColumns;
}

将父（顶部）组合的水平跨度设置为列数。

该方法

protected void doFillIntoGrid(Composite parent, int numColumns) {
    top = parent;

    // set layout
    GridData gd = new GridData(GridData.FILL_HORIZONTAL);
    gd.horizontalSpan = numColumns;
    top.setLayoutData(gd); ... }

设置布局，水平跨度设置为列数。

何时以及为什么列数以某种方式应用于网格数据对象两次，使用哪种方法？这可能是一个非常愚蠢的问题，但我刚刚开始了解整个事情......有人可以向我解释它是如何工作的吗？（或者甚至参考一个不错的网页，我可以在其中找到解释）

原文

I try to build a part of an eclipse pref page which contains a table and add/remove-buttons. I have found some example code but I don't understand the following thing:

The method

protected void adjustForNumColumns(int numColumns) {
    ((GridData)top.getLayoutData()).horizontalSpan = numColumns;
}

sets the horizontal span for the parent (top) composite to the number of columns.

And the method

protected void doFillIntoGrid(Composite parent, int numColumns) {
    top = parent;

    // set layout
    GridData gd = new GridData(GridData.FILL_HORIZONTAL);
    gd.horizontalSpan = numColumns;
    top.setLayoutData(gd); ... }

sets the layout with the horizontal span set to the number of columns.

Which method is used when and why is the number of columns somehow applied twice to a grid data object? It might be a pretty stupid question but I just started with the whole thing... Can anybody explain to me how it works? (Or even refer to a nice webpage where I can find an explanation)

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