How to move a widget from a layout to another layout?

HelloWorld88

hello all!!

im new in Qt and C++, I want to move 2 widget from a vertical layout to horizontal layout when a button is clicked. I already tried two days in a row and dont know how to solve that problem... (I already designed the UI and a sliding menu writing in C++)

example:
when I click the burger button I want those two button below the burger button move to the same layout as the burger button.

1) Main Page.png

after clicking

6) Hamburger Open.png

Thanks you!!

jsulm

@HelloWorld88 Find out the index of the widget you want to move in the current layout using https://doc.qt.io/qt-5/qlayout.html#indexOf
Then remove the widget from the current layout using https://doc.qt.io/qt-5/qlayout.html#takeAt
Then add the widget to other layout using https://doc.qt.io/qt-5/qlayout.html#addWidget

JonB

@jsulm
I think you can skip indexOf() + takeAt() by using https://doc.qt.io/qt-5/qlayout.html#removeWidget instead? (Though you may get no warning if the widget isn't found, where indexOf() would have let you know.)

jsulm

@JonB Sure, you're right

HelloWorld88

@JonB Im using removeWidget(), but now how I can remove the Stretch() that I add previously in the Layout?
@jsulm I will try now with you recommendation.

SGaist

Hi,

Where is the stretch located ? Based on that you can use the takeAt method.

SimonSchroeder

@JonB @jsulm You don't need takeAt nor removeWidget. Every widget can only be a child of one parent. If you use addWidget to add the widget to a different layout it will be reparented and thus be removed from the previous layout.

@HelloWorld88 Removing the stretch is a little bit more complicated. How did you add it? Did you create your layout using ui-files or did you assemble your widgets in pure C++ code? Did you use addStretch() to add the stretch? Maybe @SGaist 's method already works.

JonB

@SimonSchroeder
Interesting! Seems a little bit dodgy to me --- I'd be fearful of getting a warning that the widget was already added to some other layout and I should take/remove it first! But I respect what you say.

Since the OP announced he now wants to move a stretch and not just a widget, I would have thought he will want to use indexOf() to locate the widget and then from that locate the stretch as the previous/next sibling to remove, or similar.

HelloWorld88

@JonB @jsulm @SGaist @SimonSchroeder thanks you all for you replies I already solve the problem yesterday of the stretch, I used TakeAt method.

        QLayoutItem *stretch;
        stretch = mainMenuVLayout->takeAt(3);
        delete stretch;

SimonSchroeder

@HelloWorld88 said in How to move a widget from a layout to another layout?:

I already solve the problem yesterday of the stretch

Thank you for sharing. Don't forget to mark your answer as correct.