How to arrange the items in QGridLayout as shown?

Question

------------  ------
|          |  | 2  |
|          |  |    |
|     1    |  ------
|          |  ------  
|          |  |  3 |
------------  ------

How to arrange the QGridLayout like above?

I tried:

QGridLayout *layout = new QGridLayout();
centralWidget->setLayout (layout);

layout->addWidget (objOne, 0, 0);
layout->addWidget (objTwo, 0, 1);
layout->addWidget (objThree, 1, 1);

but failed.

Answer 1

Check the addWidget documentation. You can provide the rowSpan and columnSpan

QGridLayout *layout = new QGridLayout();
centralWidget->setLayout (layout);

layout->addWidget (objOne, 0, 0, -1, 1);
layout->addWidget (objTwo, 0, 1, 1, 1);
layout->addWidget (objThree, 1, 1, 1, 1);

Notice however that it is much easier to create the desired layout using QtDesigner. Check this Qt documentation page for more details

Answer 2

Is it somehow mandatory for you to use QGridLayout for some reason? For simple layouts like this, I find it easier to use a combination of one QHBoxLayout and one QVBoxLayout.

QVBoxLayout* vlayout = new QVBoxLayout();
vlayout->addWidget(objTwo);
vlayout->addWidget(objThree);

QHBoxLayout* hlayout = new QHBoxLayout();
hlayout->addWidget(objOne);
hlayout->addLayout(vlayout);