@learnist Np :) However, for a real app, you should also consider the use case where users spell the new name wrong and want to delete it/edit it later to correct it.

@mikael-larsson Hi You could try an event filter on the Combobox and call the code for hover effect but if your effect is purely stylesheet based then i think you then must send it fake hover event to trigger it or something like that. You might also be able to subclass the combo and rig the paintEvent with if (someflag) option.state |= QStyle::State_MouseOver; to trigger hover on command from the event filter/ or combo hover or how you plan to trigger it.

Apparently the problem is activated() signal which is sent even when the choice is not changed. So if I have a single item selected then in the slot item state it toggled to the unchecked state. I have tried to use clicked() signal of the combobox's view but it does not work at all, slot never called. I'm on Linux with Qt 5.9.5.

@hobbyProgrammer You cannot have a combo which is both bound to a model and has some extra row inserted into it --- it's one or the other. There are several possible approaches: Make your SQL query return a UNION ALL which includes a literal <select> as an extra row. Not really nice, because it makes the <select> be an extra row from the query. Copy the result set from the query into another model (you probably only need a list, perhaps a QStringList) where you insert the extra <select> as an item and use that as the combo's model. If you don't get a better example, this is the most obvious to code. Interpose a QIdentityProxyModel between the query model and the combo, and add the extra row there. I suspect this is the way it's supposed to be done(?).

That article answers quite a few questions I had about that scenario, woah nice thanks! But... I kinda like the idea of more "control"... somehow, creating the widget this way allow the user to resize it which won't be possible using a popup, so I would like to get the focus to work properly... TIA

@SGaist Awesome thanks! I think I can get it to do my bad biding now :- )

@AloyseTech IIRC hidePop() will reset the Popupwidget, so maybe hijack the add/remove process. Call hidePopup before adding are removing item and call showPopup afterwards?

What's the problem replacing the QSpinBox with a QComboBox in the example? Did you even try?

@J.Hilk ok then you can follow the suggestion from @mrjj (in case you would have set a custom model you would have need to handle the Qt::SizeHintRole in your data() method) or try to set a QStyledItemDelegate to the view and use your stylesheet.

I did this: ui->comboBox->clear(); ((QSqlTableModel*)ui->comboBox->model())->select(); And it's working!

@koahnig Not directly. You have to fake it: bool eventFilter(QObject* watched, QEvent* event) { if( watched == comboBox ) // or watched->inherits("QComboBox") ?? { // you may want to do additional checks here for a generic solution (like the combobox is really editable, it has a insert policy set, etc) switch( event->type() ) { case QEvent::FocusOut: { QKeyEvent keyEvent( QEvent::KeyPress, Qt::Key_Enter, Qt::NoModifier ); QCoreApplication::instance()->sendEvent( watched, &keyEvent ); } break; } } return BaseClass::eventFilter(watched,event); }

Hi @SolaVitae , as suggested by @jsulm you have to delete param name in connect signal, you can keep const & Your connect will be then: connect(charactersBox, SIGNAL(currentIndexChanged(const QString &)), this, SLOT(characterSelectedChange(const QString &)));

Right, that's the best solution if you are using a QTabWidget.

I had create a model with key and value and pass it to qml, it worked!!! Sorry for late reply. Thank you @raven-worx

@tamlong0205 I think most of this can be done from C++ side. You can add a function in the model which can return what type is the data for current index. This function will be called from QML and depending upon its value use a Loader to load the specific delegate. Perhaps setting currentIndex in Component.onCompleted handler ? Create a C++ function which will store in info in the model itself i.e When you change the index in ComboBox call this function and update the value there and may be maintain a role to store this update.

I apologise for the delay in response. The question was to make sure that the combobox always pops up in a given direction or position.

Ok, thanks a lot! Marked as solved!

QComboBox {background-color:rgb(190,190,190);color:black;padding-left: 10px;padding-right: 30px;border-style: solid;border-width: 0px;} "padding-left: 10px;" the padding will shift the combo-box displayed content form the left edge QComboBox::drop-down {subcontrol-origin: padding; subcontrol-position: top right;width: 40px;border: 0px ;} "subcontrol-position: top right;" and the above will position wot text to the right. Hopefully this helps.

@VRonin With the provided code the whole dropdown list will be invisible. Do you know how to keep the items unaffected?

@mrjj said: this->ui->personComboBox then pointer must be corrupt?

@raven-worx Thanks a lot ! This does exactly what I want !

@SGaist Thanks. That's definitely another option. I suppose these approaches are as good as it gets for having a toolbar item auto-adjust to horizontal vs. vertical. Thanks again.

@Rondog I was already thinking of setting the maximum width for each combobox but when creating the comboboxes I dont know the width of the scrollareas viewport. @SGaist Will try that, seems to be the more nice solution :) Thanks

Solution that works for me is to call unpolish and polish on combo box: auto cb = new QComboBox(this); cb->setItemDelegate( new QStyledItemDelegate); style()->unpolish(cb); style()->polish(cb);

@_compiler said: thanks.

@elveatles Thank you. You were right.

Hi, Isn't QComboBox::activated what you are looking for ?

It shouldn't belong to the Purchase table. That table should only contain items whether they come from a store or somewhere else is not something that that table should handle.

Thank you to the_ and SGaist! I realised it like the_ explained. In my case it is the easiest way and it works (in a combobox with a list of values from a related table, I want to know if the entered string is part of the list and if not (index = -1) I open a dialog to add a new value in the related table). But I admit, QCompleter is also a smart solution. Maybe in the future...

I solve it I use the same thing ui->comboBox->view()->setVerticalScrollMode(QAbstractItemView::ScrollPerPixel); if there is a better solution please post it Thanks

@wavelike said: don't they use QComboBox-like widgets to offer different colors, brush thickness etc? Hm, I guess that's true, but I'd say it has more to do with QMenus and QToolButtons than QComboBox. But then again they are indeed similar in some ways. Oh well, the important thing is it's doable and quite easy ;)

Yes, it's clearer. In that case I'd create a subclass of QComboBox with a property that would return content of data.

Thank you it worked.

@Michael-Scopchanov said in QComboBox with QAbstractItemModel, default text problem: "I would be glad to" is considered a polite form of speech. Provide some minimal example or code if you expect someone to look at it, comment and try to help you. This kind of arguing does not, nor is going to, get you anywhere. PS. Notice I didn't use "please", "would you", "be so kind as to" etc., because these words have no meaning in a technical discussion. We want facts and well structured problems to take a stab at and have some fun, and you want answers; it's a symbiosis and we don't get paid for our time. So unless someone's been openly hostile or have shown malice, which nobody had, then just as a friendly advice you'd do yourself good to grow some thicker skin.

I have solved my problem in this way: First I have changed the modelColumn to the Column with the key-value in the second combobox: ui->cbCostCenterGr->setModelColumn(0); Then I fetch the key-value for the second combobox from the first combobox... QModelIndex id = ui->cbCostCenter->model()->index(index, 2); QString _CcGr = id.data().toString(); ...and search the value in the second combobox: ui->cbCostCenterGr->setCurrentIndex(ui->cbCostCenterGr->findText(_CcGr)); At least I change the modelColumn of the second combobox to the column with the text (to display the text and not the key-value): ui->cbCostCenterGr->setModelColumn(1); Here is the hole function: void VoucherPosForm::on_cbCostCenter_activated(int index) { ui->cbCostCenterGr->setModelColumn(0); QModelIndex id = ui->cbCostCenter->model()->index(index, 2);//"2" is the key-column QString _CcGr = id.data().toString(); ui->cbCostCenterGr->setCurrentIndex(ui->cbCostCenterGr->findText(_CcGr)); ui->cbCostCenterGr->setModelColumn(1); } It works fine, but is there a straighter way??

Yeah, according to QComboBox code should work: QVariant QComboBox::itemData(int index, int role) const { Q_D(const QComboBox); QModelIndex mi = d->model->index(index, d->modelColumn, d->root); return d->model->data(mi, role); } Will implement this.