[SOLVED] How to initialize a bunch of similar comboBoxes at once in a loop?

devjb

Hi,

I am wondering if there is a simple way to initialize combo boxes which are all of the same content at once in a loop using:

@ui->ComboBoxXYZ->addItem("somedescription", someinteger);@

!http://jochenbauer.net/publicpics/comboExample.png!

The combo boxes in each line simlpy should contain the same entries.

I am an absolute qt-newbie and would appreciate any hint on this.

Thanks in advance

Regards

Jochen

mcosta

Hi,

if you use a nameing schema for your combo boxes, you can use findChildren with QRegularExpression to achieve your result.

For example in my ui are defined several QComboBox named "comboBox_1", "comboBox_2" and so on.
This code
@
Widget::Widget(QWidget *parent) :
QWidget(parent),
ui(new Ui::Widget)
{
ui->setupUi(this);

QList<QComboBox*> combos = findChildren<QComboBox*>( QRegular[removed] "comboBox_.*"));
QStringList comboItems;
comboItems << "Foo" << "Bar";

Q_FOREACH (QComboBox* combo, combos) {
combo->addItems(comboItems);
}
}
@
add "Foo" and "Bar" to all of them

P.S. I don't know why the string QRegularExpression is shown as QRegular[removed]

leon.anavi

You can also consider using a layout such as "QGridLayout":http://qt-project.org/doc/qt-5.0/qtwidgets/qgridlayout.html and to add the combo boxes using method "addWidget":http://qt-project.org/doc/qt-5.0/qtwidgets/qgridlayout.html#addWidget

devjb

mcosta,

thank you for your suggestion. It is a very nice solution. I just had to change some little things to deal with the item data. I also changed it to work with QT4.

This is my code now:

@//Fill comboboxes for area and formats with data

  QList<QComboBox*> comboBoxesArea = findChildren<QComboBox*>(QRegExp("comboBoxArea_.*"));
  QList<QComboBox*> comboBoxesFormat = findChildren<QComboBox*>(QRegExp("comboBoxFormat_.*"));
  QStringList comboItemsArea;
  QStringList comboItemsFormat;
  QList<int> comboValuesArea;
  QList<int> comboValuesFormat;

  comboItemsArea << " " << "E" << "A" << "M" << "DB" << "Z" << "T" << "IEC_Z" << "IEC_T";
  comboItemsFormat << " " << "BOOL" << "BYTE" << "WORD" << "DWORD" << "INT" << "DINT" << "REAL";
  comboValuesArea << 0x0 << daveInputs << daveOutputs << daveFlags << daveDB << daveCounter << daveTimer << daveCounter200 << daveTimer200;
  comboValuesFormat << 0x0 << AnzFormatBool << AnzFormatHexadezimal << AnzFormatHexadezimal << AnzFormatHexadezimal << AnzFormatDezimal << AnzFormatDezimal << AnzFormatGleitpunkt;

  int areaItemsCount = 0;
  int formatItemsCount = 0;

  Q_FOREACH(QComboBox* areaBox,comboBoxesArea)
  {
      areaBox->addItems(comboItemsArea);
      areaBox->itemData(areaItemsCount,comboValuesArea.value(areaItemsCount));
      areaItemsCount++;
  }
  Q_FOREACH (QComboBox* formatBox,comboBoxesFormat) {
      formatBox->addItems(comboItemsFormat);
      formatBox->itemData(formatItemsCount,comboValuesFormat.value(formatItemsCount));
      formatItemsCount++;
  }@