How to change the order of tabs in a QTabWidget

Tomax63

I create them in QTDesigner

How can I create them again during app start?

JonB

@Tomax63

Let them be created initially in the order defined in Qt Creator. this is good anyway for first time, when there is no saved order.
Read the saved order, if any.
Move them around accordingly.

What is wrong/the actual problem with this?

Tomax63

Your point 3 is the problem. I dont know how to do it.

JonB

@Tomax63
As @VRonin said, you will use tabwidget->tabBar()->move(from,to). Is there something specific about that which you are not able to do?

Tomax63

Yes, i want to find the "from" value.

jsulm

@Tomax63 I guess you need to iterate over all these widgets until you find the one with given text?

JonB

@Tomax63
So you'd like us to look at your original code and figure why it can't find the tab, right?

I'll look in a sec. Meanwhile:

qint32 i = 0;
...
to = i;

How is to ever going to be anything other than 0?

Although @VRonin wrote tabwidget->tabBar()->move(from,to);, I only actually see void QTabBar::moveTab(int from, int to) (https://doc.qt.io/qt-5/qtabbar.html#moveTab). from & to are integer positions, so do yourself a favor and start by replacing your foreach (QString v, tab_sequenz.split(";")) with an old-fashioned for loop counter so that it's easy to get number positions....

JonB

@Tomax63
So I think you are saying your

 w = ui->my_tabwidget->findChild<QTabWidget *>(v); //get the necessary widget

is not finding the tab by name. That would imply one of:

The name is not right.
The matching tab is not currently in the widget.

So do a little digging. What tabs are actually there? What are their names and what are you searching for? If necessary, just do the iteration in your own code to see what's going on. In any case, you're going to need the tab's index to pass to move(), so from findChild() you're going to have re-look up the result in the tabs, you might be best off doing it yourself retuning an index number in the first place....

Tomax63

I made it.

void MainWindow::restore_tab_seq(QString tab_sequenz){
    QStringList v = tab_sequenz.split(";");
    qint32 i = 0, j = 0, k = v.count();
    for(i=0; i<k; i++){
        for (j=0; j<ui->registerkarten->tabBar()->count(); j++){
            if (ui->registerkarten->tabBar()->tabText(j).toStdString() == v[i].toStdString()){
                ui->registerkarten->tabBar()->moveTab(j, i);
            }
        }
    }
}


Thanks for your help, mates.

SGaist

Hi,

Why are you using toStdString to compare two QStrings ?