How to using mouse to change size of grid layout cells using Qt?

Question

I use grid layout (horizontal and vertical too). I like the fact that when resizing the window fills the entire window contents. but this extension is poorly managed. I often want to change the size of only one column in grid layout without changing the size of the window. such as in Windows Explorer. there are two columns - the left list of directories and their contents to the left to the right. and i can always press mouse button therebetween and pulling change the mutual sizes of columns in relation to each other.

how can I do this in Qt?

Answer 1

You need to use a QSplitter rather than a QGridLayout in this specific case (where you just want 2 widgets shown together). QSplitters are draggable.

Answer 2

You are looking for QSplitter

(The following is the procedure in the Qt Designer)

1. Group your widgets, and click Lay Out Horizontally/Vertically in Splitter

2. Put this group into another layout (QGridLayout, for example) to automatically expand it.
3. Congrats! Your Layout is now draggable(from step1) and expandable(from step2).