c++ - QT纯手工布局GridLayout

Question

不用Designer设计界面，纯手写代码的话，怎样直接用GridLayout设计下面这样的布局？
我的问题主要是图中label_6和label_7怎样居中？

P.S.
我知道可以先用水平布局再用垂直布局，但是能否直接用GridLayout做出来？
另外：

setRowStretch(int row, int stretch)
setColumnStretch(int column, int stretch)

这两个函数的意思是什么？我试了一下也没看出个所以然来……

Answer 1

setRowStretch is to set the ratio of the row height to the total row height.
For example, there is a gridlayout with 4 rows. If you want their row height ratio to be 1:3:5:7, set it like this:

setRowStretch(0, 1);
setRowStretch(1, 3);
setRowStretch(2, 5);
setRowStretch(3, 7);  

setColumnStretch sets the column width.

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To achieve centering, I usually add two spring controls on the left and right sides of the control, that is, QSpacerItem;
If I simply use gridlayout to implement a layout like the one shown in the figure, I don’t have a good solution for the time being. My usual approach is to use table layout and put a horizontal layout, then put the required controls in the horizontal layout and center the controls.