[SOLVED] After setting default item index of QCombobox will not be updated on GUI

Snowseeker

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);

}@

p3c0

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.

Snowseeker

I've taken away the emit but sadly combobox stays still empty in initial state.

p3c0

Hmm that is because you are setting currentIndex to that of the seperator. Change any one.

Snowseeker

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);@