How to expand tabs in QTabWidget

KelvinSP

I have a QTabWidget like this:

alt text

But I want to expand the tabs to "fill" the entire widget width, like this:

alt text

How can I do that?

I tried to use the setExpanding function:

ui->myTabWidget->tabBar()->setExpanding(true);

But it didn't solve my problem.

I am using Qt 5.3.2 and Qt Creator 3.2.1

Update:

I found a discussion about this here:

https://forum.qt.io/topic/47404/qtabbar-will-not-expand-its-tabs/7

As the @SGaist answered, I need to subclass QTabBar and reimplement tabSizeHint to achieve that.

Anyway, I will keep this topic opened for a while because I have hope that someone finds some easiest way to do that.

mostefa

Hi @KelvinSP

What about stylesheet?

ui->myTabWidget->setStyleSheet("QTabBar::tab {min-width: 150px;max-width: 400px;}");

For example??

KelvinSP

Thanks a lot, @mostefa. It worked and it is very simple.

I am calculating the width based on the QTabWidget width.

To get the QTabWidget width correctly I need to get it in the showEvent function:

void LogListForm::showEvent(QShowEvent *ev)
{
    /*
     * Divide by 2 because we have 2 tabs.
     * I need to decrease 24 pixels to fill the width correctly, I don't know exactly 
     * why 24 pixels, but I found this number by making some tests
     */
    int tabWidth = (ui->myTabWidget->width()/2)-24;
    /*
     * Then, I set this tabWidth to the styleSheet.
     * Note: I need to set the previously styleSheet to not lose it
     */
    ui->myTabWidget->setStyleSheet( ui->myTabWidget->styleSheet() +
                                    "QTabBar::tab {"
                                    "width: " + QString::number(tabWidth) + "px; }" );
}

mostefa

@KelvinSP

You are welcome !

if you do not have a minimum and maximum width i think that you can use "width" property, instead of "min-width" and "max-width" ,

"width: " + QString::number(tabWidth) + "px;"

But it is just a detail , your code is ok,

Happy to see that my code helped you ;)

KelvinSP

@mostefa you're right.
I will update my code.
Thanks again.