How to disable a qlistwidget item in Qt C++

moyin

hi, i came across an situation that needs to disable a specific item in a qlistwidget , i didn't find any method like setenable(bool)/setdisable(bool).
so any idea do you, to resolve this, please help in this regard.

mrjj

Hi
You can make it not select able
item->setFlags(item->flags() & ~Qt::ItemIsSelectable);

Paul Colby

Hi @moyin,

Not sure, but perhaps something like:

QListWidgetItem * item = listWidget->item(row); // Or some other way to get the item in question.
item->setFlags(item->flags() & ~Qt::ItemIsEnabled); // Remove the group of ItemIsEnabled flags.

Cheers.

Edit: Ah, @mrjj beat me to it ;)

moyin

@mrjj
hi thanks for rply, i tried as u suggested but doesn't make sense.

ui->listWidget_CPUs->item(0)->setFlags( ui->listWidget_CPUs->item(0)->flags() & ~Qt::ItemIsSelectable);

Devopia53

@moyin

If so, what @Paul-Colby already proposed is what you want.

mrjj

@moyin

In what way "doesn't make sense." ?

moyin

@Paul-Colby,Hi thanks for reply,
how to re-enable it back after disabling bcoz the above code will disable permanantly, i need to enable back it again.

mrjj

@moyin

Hi just remove the
~
item->setFlags(item->flags() & Qt::ItemIsEnabled);

JonB

@mrjj , @Paul-Colby
That won't work, I think, once the flags have been set. He'll want:

ui->listWidget_CPUs->item(0)->setFlags( ui->listWidget_CPUs->item(0)->flags() | Qt::ItemIsSelectable);

moyin

@JonB @mrjj , @Paul-Colby
I tried this

ui->listWidget_CPUs->item(0)->setFlags( ui->listWidget_CPUs->item(0)->flags() | Qt::ItemIsSelectable);

doesn't working, i want to enable it again after disabling.

Devopia53

@moyin

You can try this:
ui->listWidget_CPUs->item(0)->setFlags(ui->listWidget_CPUs->item(0)->flags() ^ Qt::ItemIsEnabled); // both enable or disable, toggle mode

JonB

@moyin
Well, if ui->listWidget_CPUs->item(0)->flags() & ~Qt::ItemIsSelectable disables it, then ui->listWidget_CPUs->item(0)->flags() | Qt::ItemIsSelectable undoes the effect of the first statement....

I suppose you could try ui->listWidget_CPUs->item(0)->flags() | Qt::ItemIsSelectable | Qt::ItemIsEnabled, but I don't see why you should have to.

moyin

@JonB yes! it works fine thank you,