A combobox in Qt is a drop-down menu that allows the user to select one option from a list of options.
To create a combobox in Qt, you can use the QComboBox class. Here’s an example of how to create a simple combobox with three options:
#include <QtWidgets/QApplication>
#include <QtWidgets/QComboBox>
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
QComboBox comboBox;
comboBox.addItem("Option 1");
comboBox.addItem("Option 2");
comboBox.addItem("Option 3");
comboBox.show();
return app.exec();
}
In this example, we first include the necessary headers and create a QApplication object. We then create a QComboBox object and add three items to it using the addItem() method. Finally, we show the combobox and start the event loop by calling app.exec().
You can also set the current selection of the combobox programmatically using the setCurrentIndex() method:
comboBox.setCurrentIndex(1); // sets the second option as selected
And you can retrieve the index or text of the currently selected item using currentIndex() or currentText():
int selectedIndex = comboBox.currentIndex();
QString selectedText = comboBox.currentText();
