Kivy:BoxLayout 与 GridLayout

2022-01-15 00:00:00 python kivy

问题描述

BoxLayout(orientation='vertical') 与 GridLayout(cols=1):

他们都做同样的事情，不是吗?有理由选择其中一个吗?

They both do the same thing, no? Is there a reason to choose one over the other?

解决方案

区别在于大小和位置.

一般来说，GridLayout (cols: 1) 总是将元素保持在一列中，而有使用 BoxLayout (orientation: 'vertical') 时更灵活地组织单个小部件.

In general, GridLayout (cols: 1) is always going to keep the elements in one column, whereas there is more flexibility to organize individual widgets when you use BoxLayout (orientation: 'vertical').

这是一个非常简单的示例，说明您可以使用 BoxLayout 进行操作，因为它支持 pos_hint、size 和 size_hint(以及其他，例如 center_x、x、y、right，-注意它们也依赖于BoxLayout 的 vertical 或 horizo​​ntal 方向会影响各个小部件:

Here is a very simple example of something you can do with BoxLayout because it honours pos_hint, size and size_hint (and others such as center_x, x, y, right, - notice that they also depend on the vertical or horizontal orientation of the BoxLayout) which affects individual widgets:

<Test@BoxLayout>:
    orientation: 'vertical'
    Button:
        text: 'a'
        size_hint: None, None
        size: 100,50
        pos_hint: { 'center_x' : .5 }
    Button:
        text: 'b'

这是 200x200 屏幕中的输出:

This is the output in a 200x200 screen:

如果您尝试做同样的事情，但改用 GridLayout，那么您会得到:

If you attempt to do the same but using GridLayout instead, then you get this:

最后，GridLayout 有一些属性来控制列的大小:

Finally, GridLayout has some properties to control the size of the column:

  • col_default_width:为所有列的默认宽度
  • col_width:每列的宽度列表(在此没有用处案例，因为我们只有一个)
  • col_force_default:它将忽略单个小部件的任何现有 size_hint 或 size 并强制列宽
  • minimum_width:所以列不会缩小太多
  • col_default_width: for the default width of all the columns
  • col_width: a list of widths for each column (not useful in this case since we have just one)
  • col_force_default: which will ignore any existing size_hint or size for individual widgets and force the column width
  • minimum_width: so the column not shrink too much

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