[SOLVED] After setting default item index of QCombobox will not be updated on GUI
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Hi,
I would like to add items to my combobox during starting up my application. And after adding all my items I would like to change the current index to my default. Sadly on the GUI the combox is blank if my program starts up. If I click on the combobox I will see the added items. Do I have to call some update method?
What I'm wondering too is if don't call setCurrentIndex() method. Then the combox will not be blank and index 0 is visible.
Thanks in advance for your help.
@MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{for(UINT8 i = 0; i < ( sizeof(myList)/sizeof(myList[0]) ); i++) { ui->comboBox->addItem( myList[i] ); } connect(ui->comboBox, SIGNAL( currentIndexChanged(int) ), this, SLOT( mySlot(int) ) ); ui->comboBox->insertSeparator(4); emit ui->comboBox->setCurrentIndex(4);
}@
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Hi,
Welcome to Qt forum.
@
emit ui->comboBox->setCurrentIndex(4);
@"setCurrentIndex":http://qt-project.org/doc/qt-5/qcombobox.html#currentIndex-prop is a normal function, no need to use emit.
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I've taken away the emit but sadly combobox stays still empty in initial state.
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Hmm that is because you are setting currentIndex to that of the seperator. Change any one.
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It's now running. The methods insertSeperator() and setCurrentIndex() should not have the same index. Solution below.
@ui->comboBox->insertSeparator(4);
ui->comboBox->setCurrentIndex(4 + 1);@