How can I get the selected VALUE out of a QCombobox

Question

In Qt  I can get the selected text of a QComboBox by using the  combobox- gt currentText   method  How can I get the selected value   I searched for help but I couldn t find a method currentData   which I expected to find  I could only find combobox- gt currentIndex    Is there a smarter way to do it other than combobox- gt itemData combobox- gt currentIndex      Update  This is no longer necessary as of Qt 5  A currentData   method has been added http   doc qt io qt-5 qcombobox html currentData-prop

User · Answer

you can set QVariant data for all items  then you can get the value when you need it   there is an example code for this situation   ui comboBoxSheetSize- gt addItem  128 m   QVariant 128    ui comboBoxSheetSize- gt addItem  256 m   QVariant 256    ui comboBoxSheetSize- gt addItem  512 m   QVariant 512    ui comboBoxSheetSize- gt addItem  1024 m   QVariant 1024          void Page  onComboSheetSizeChanged  int index      int value   ui comboBoxSheetSize- gt itemData index  toInt          by the way  i think i misunderstood your question  i think the way you get data is smart enough

User · Answer

I m astonished that there isn t an activated signal and have the same problem  I solved it by making a subclass of QComboBox  I think it s better to avoid having to directly access the object and call its functions because that means more tight coupling and goes against Qt s philosophy  So here s the class I made that works for me   class SmartComboBox   public QComboBox        Q OBJECT  private slots       void triggerVariantActivated int index    public       SmartComboBox QWidget  parent    signals       void activated const QVariant  amp          And the implementation  void SmartComboBox  triggerVariantActivated int index        activated itemData index       SmartComboBox  SmartComboBox QWidget  parent   QComboBox parent        connect this  SIGNAL activated int    this  SLOT triggerVariantActivated int

User · Answer

I did this  QDir path   home user     QStringList  dirs   path entryList QDir  Dirs   std  cout  lt  lt    dirs count      lt  lt   dirs count    lt  lt  std  endl  ui- gt cmbbox- gt addItem Files   ui- gt cmbbox- gt show      You will see with this that the QStringList named  dirs is structured like an array whose members you can access via an index up to the value returned by  dirs count

User · Answer

if you are developing QGIS plugins then simply   self dlg cbo load net currentIndex

User · Answer

I had the issue and   QString str   m UI- gt myComboBox- gt currentText      solved this

User · Answer

The question is old  but maybe  somebody need an actual answer    In the QGIS 3 4 you can get the value from the QComboBox with the method currentData     Example  comboBox currentData    Link  https   doc qt io qt-5 qcombobox html currentData-prop

User · Answer

This is my OK code in QT 4 7      add combobox list      QString val     ui- gt startPage- gt clear        val    http   www work4blue com       ui- gt startPage- gt addItem tr  Navigation page   QVariant  fromValue val        val    https   www google com       ui- gt startPage- gt addItem  www google com  QVariant  fromValue val        val    www twitter com       ui- gt startPage- gt addItem  www twitter com  QVariant  fromValue val        val    https   www youtube com       ui- gt startPage- gt addItem  www youtube com  QVariant  fromValue val           get current value     qDebug    lt  lt   current value  lt  lt          ui- gt startPage- gt itemData ui- gt startPage- gt currentIndex    toString

User · Answer

It seems you need to do combobox- gt itemData combobox- gt 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

User · Answer

I know I m very late but for those who still have that problem  it can be solved easily  I use Qt 5 3 and it works fine  No need to create a function or all that   int valueComboBox  valueComboBox   comboBox- gt currentIndex      and it works    Hope it helps

User · Answer

I had same issue   I have solved by   value   self comboBox currentText   print value

User · Answer

The member function QComboBox  currentData has been added since this question was asked  see this commit

User · Answer

I confirm the easiest way is to do this   uiAnalyseAssets  AnalyseAssets QWidget  parent    QWidget parent    ui comboBox- gt addItem  text1    ui comboBox- gt addItem  text2            void mainFunction  yourFunction  int index      int value   ui comboBox- gt currentText

User · Answer

This one can get the text of current index   QString cb   cbChoice - gt currentText

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

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