Why do my nested layouts overlap?

[tamirmichael]

Hello,

This is the result of the code below:

bars_and_scrollbars_layout_ptr = new QGridLayout(this) ;
        bars_and_scrollbars_layout_ptr->setSpacing(6) ;
        bars_and_scrollbars_layout_ptr->addWidget(ui.qcustomplot_ptr, 0, 0, 3, 3) ;
        
.....

control_buttons_layout_ptr = new QGridLayout(this) ;
        control_buttons_layout_ptr->setSpacing(6) ;

....

main_layout_ptr = new QVBoxLayout(this) ;
        main_layout_ptr->setSpacing(6) ; 
        main_layout_ptr->insertLayout(0, bars_and_scrollbars_layout_ptr) ;
        main_layout_ptr->insertLayout(1, control_buttons_layout_ptr) ;
        
.....

setLayout(main_layout_ptr) ;

What I want to see is the layout that hosts the buttons (by the way only one is visible for some reason) below the chart.
What a I forgetting?

Thanks in advance!

[Christian Ehrlicher]

Can't you use the designer for it? It even looks like you're already using a designer-created ui:

ui.qcustomplot_ptr

[Edit aha_1980: Fixed typo]

[tamirmichael]

Hi,
I prefer not using the designer.
Any idea what's going on here?
Thanks

[SGaist]

Hi,

You are trying to assign every single one of your layouts to the widget. Using this in the constructor makes it equivalent to

main_layout_ptr = new QGridLayout() ;
setLayout(main_layout_ptr)

It's likely not what you want.

[tamirmichael]

Hi,

I'm sorry I don't understand: What is it that you suggest I do to get vertical container embed 2 grid containers?

[mrjj]

Hi
Nope he suggests you do not assign parent in the constructor of the sub-layouts. ( as i read it ;)

bars_and_scrollbars_layout_ptr = new QGridLayout(this) ;
control_buttons_layout_ptr = new QGridLayout(this) ;

[tamirmichael]

Thank you.
I am not sure though why this caused the issue above. I solved it by indeed removing "this" and indicating the column span for the buttons.
But why does indicating parenthood cause this? I find this part to be much harder than in Python based GUI, for example...

[mrjj]

@tamirmichael
Hi
As @SGaist says
assigning a parent widget for the layout is a shortcut for doing

somelayout = new QGridLayout() ;
setLayout(somelayout);

Which is super when its standalone layout but as you have seen give strange side effects
if later assigned as sub-layout.

I use mostly Designer as its so quick to design even complex layouts so I didn't even spot it when looking
at your code.

[tamirmichael]

Thank you all for the time and the effort !

[mrjj]

@tamirmichael
Np :)
Please mark it as solved using the Topic button