How to fill QML Combobox on C++ side by ListElement

desperado_43

Hi Everybody. I write a code which fill combobox from C++ side. My code is Ok by using QStringList

class ComboboxUpdate:public  QObject
{
    Q_OBJECT
    Q_PROPERTY(QStringList comboList READ comboList)

public:

    ComboboxUpdate(QObject *parent = 0);


    const QStringList comboList();
    void setComboList( const QStringList &comboList); 
......

Qml part is:

   ComboBox {
        
      model:combomodel.comboList
......

I don't want to put details here.I can fill it from c++ side with code blocks above.But I want to fill with ListElement not only text For Exaplem qml:

   ComboBox {
             ListModel {
          ListElement {text:"Orange" ;sqlid:1;}
            ListElement {text:"Apple"  ;sqlid:2;}
           ListElement {text:"Greeps";sqlid:3;}
       }

How to pass stuff like that to combobox from c++ side.Because sqlid is necessary for me.I use them on OnCurrrentTextChange event that put the sqlid in Javascript code.Any ideas ? Thank you ....

mike_student

So assuming your QObject subclassed class has a property say for eg. text then to populate ComboBox with it you will have to set textRole to 'text'

ComboBox {        
      model: combomodel.comboList
      textRole: "text"
 }

after that you can get your sqlid attribute from model

mike_student

You need to change QStringList to QList<QObject*>
From

class ComboboxUpdate:public  QObject
{
    Q_OBJECT
    Q_PROPERTY(QStringList comboList READ comboList)
...
}

to

class ComboboxUpdate:public  QObject
{
    Q_OBJECT
    Q_PROPERTY(QList<QObject*> comboList READ comboList)
}

for example you could change your code in this way or add a subclass

class ComboboxUpdate:public  QObject
{
    Q_OBJECT
    Q_PROPERTY(QStringList comboList READ comboList)
    Q_PROPERTY(int sqlid READ sqlid WRITE setSqlid NOTIFY sqlidChanged)
    Q_PROPERTY(QString text READ text WRITE setText NOTIFY textChanged)
}

and in ComboBox you can use

ComboBox {
                    id: typeComboBox
                    model:combomodel.comboList
                    textRole: "text"
                    onCurrentIndexChanged: {
                        var sqlid = typeComboBox.model[typeComboBox.currentIndex].sqlid;
                        console.log(sqlid);
                    }
                }

I hope that my answer will be helpful for you.