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c++qtqlayout

How can I set a layout to a tab in QTabWidget?

I have created a QTabWidget (with no tabs) using the Qt Design tool, and now I need to create tabs and add widgets dynamically.

I can create the tab and add the widget using the following code:

MyCustomWidget *myCustomWidget = new MyCustomWidget(this);
ui->myTabWidget->addTab(myCustomWidget, "New Tab");

The problem is that the widget stays in the top left corner of my QTabWidget but I need to align it in the center (horizontally) of my QTabWidget.

How can I set a horizontal layout to this new tab created?

Note 1: My widget (MyCustomWidget) has a fixed size.

Note 2: I'm using Qt 5.3.

Solution

  • Following @Satus idea, I create a new QFrame, set the minimum size as the size of myTabWidget, set a horizontal layout and add myCustomWidget inside it, adding two QSpacerItem (left and right):

    QFrame *frame= new QFrame(this);
frame->setMinimumWidth(ui->myTabWidget->width());
frame->setMinimumHeight(ui->myTabWidget->height());

MyCustomWidget *myCustomWidget = new MyCustomWidget(frame);

QHBoxLayout *hLayout = new QHBoxLayout();

hLayout->addItem(new QSpacerItem(10, 10, QSizePolicy::Expanding, QSizePolicy::Expanding));
hLayout->addWidget(myCustomWidget);
hLayout->addItem(new QSpacerItem(10, 10, QSizePolicy::Expanding, QSizePolicy::Expanding));

frame->setLayout(hLayout);

ui->myTabWidget->addTab(frame, "New Tab");

    It worked, but if someone has a more elegant way to do so, please share with us.