qcombobox – Tarik Billa

How do I set the QComboBox width to fit the largest item?

January 8, 2024 by Tarik

Qt (4.6) online documentation has this to say about QComboBox: enum SizeAdjustPolicy { AdjustToContents, AdjustToContentsOnFirstShow, AdjustToMinimumContentsLength, AdjustToMinimumContentsLengthWithIcon } I would suggest ensuring the SizeAdjustPolicy is actually being used setting the enum to AdjustToContents. As you mention a .ui file I suggest doing that in Designer. Normally there shouldn’t be anything fancy in your constructor at … Read more

Getting all items of QComboBox – PyQt4 (Python)

January 2, 2024 by Tarik

As far as I can tell, you can just reference an item using .itemText(): AllItems = [QComboBoxName.itemText(i) for i in range(QComboBoxName.count())]

How to set QComboBox to item from item’s text in PyQt/PySide

August 22, 2023 by Tarik

Yes, there is QComboBox.findText, which will return the index of the matched item (or -1, if there isn’t one). By default, the search does exact, case-sensitive matching, but you can tweak the behaviour by passing some match-flags as the second argument. For example, to do case-insensitive matching: index = combo.findText(text, QtCore.Qt.MatchFixedString) if index >= 0: … Read more

How do I set the background color of a widget like combobox or double spin box?

August 11, 2023 by Tarik

fhe is generally correct, but doesn’t account for the widgets (like spin boxes and buttons/comboboxes) that use a different background role in the palette. A more general solution would be something like this: QPalette pal = widget.palette(); pal.setColor(widget.backgroundRole(), Qt::blue); widget.setPalette(pal); Alternatively, you could look into the descriptions of the various palette roles and figure out … Read more

How do you get the current text contents of a QComboBox?

June 6, 2023 by Tarik

You can convert the QString type to python string by just using the str function. Assuming you are not using any Unicode characters you can get a python string as below: text = str(combobox1.currentText()) If you are using any unicode characters, you can do: text = unicode(combobox1.currentText())

QComboBox – set selected item based on the item’s data

March 22, 2023 by Tarik

You lookup the value of the data with findData() and then use setCurrentIndex() QComboBox* combo = new QComboBox; combo->addItem(“100”,100.0); // 2nd parameter can be any Qt type combo->addItem ….. float value=100.0; int index = combo->findData(value); if ( index != -1 ) { // -1 for not found combo->setCurrentIndex(index); }

How can I get the selected VALUE out of a QCombobox?

January 14, 2023 by Tarik

It seems you need to do combobox->itemData(combobox->currentIndex()) if you want to get the current data of the QComboBox. If you are using your own class derived from QComboBox, you can add a currentData() function.