Quote Originally Posted by wysota View Post
Are you sure form0 is defined for every object in the model? Can you prepare a minimal compilable example reproducing the problem?
Element:

Qt Code: 
  1. class IrregularVerb : public QObject
  2. {
  3.     Q_OBJECT
  4.     Q_PROPERTY(QString form0 READ getForm0 NOTIFY formChanged)
  5.     Q_PROPERTY(QString form1 READ getForm1 NOTIFY formChanged)
  6.     Q_PROPERTY(QString form2 READ getForm2 NOTIFY formChanged)
  7. public:
  8.     QString forms[3];
  9.     QString getForm0() const { return getForm(0); }
  10.     QString getForm1() const { return getForm(1); }
  11.     QString getForm2() const { return getForm(2); }
  12.     IrregularVerb(QString a, QString b, QString c) { forms[0] = a; forms[1] = b; forms[2] = c; }
  13. protected:
  14.     const QString& getForm(const int& ind) const { return forms[ind]; }
  15. signals:
  16.     void formChanged();
  17. };
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Container for elements:
Qt Code: 
  1. class german : public QList<QObject*>
  2. {
  3. public:
  4.     german();
  5. };
  6.  
  7. german::german()
  8. {
  9.     append(new IrregularVerb("anfangen", "fing an", "angefangen")); // and so on
  10. }
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Class managing the containers:

Qt Code: 
  1. class IrregularListWrapper : public QObject
  2. {
  3.     Q_OBJECT
  4.     Q_PROPERTY(QList<QObject*> db READ getdb NOTIFY langChanged)
  5.     Q_ENUMS(Language)
  6. public:
  7.     enum Language
  8.     {
  9.         English = 0,
  10.         German = 1
  11.     };
  12.  
  13.     IrregularListWrapper() : db(0) { setLang(German); }
  14.     ~IrregularListWrapper() { delete db; }
  15.     QList<QObject*> getdb() const { return *db; }
  16.  
  17.     Q_INVOKABLE void changeLang(Language l) { delete db; setLang(l); }
  18.  
  19.  
  20. signals:
  21.     void langChanged();
  22. protected:
  23.     void setLang(Language);
  24.     QList<QObject*> * db;
  25. };
  26.  
  27. void IrregularListWrapper::setLang(Language l)
  28. {
  29.     switch (l)
  30.     {
  31.     case English:
  32.         db = new english;
  33.         langName = "English";
  34.         break;
  35.     case German:
  36.         db = new german;
  37.         langName = "German";
  38.         break;
  39.     }
  40.     emit langChanged();
  41. }
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ListView:

Qt Code: 
  1. ListView
  2.     {
  3.         id: irrview
  4.         width: parent.width
  5.         model: irregulars.db
  6.         anchors.top: caption.bottom
  7.         anchors.bottom: parent.bottom
  8.         spacing: 5
  9.         clip: true
  10.         section.criteria: ViewSection.FirstCharacter
  11.         section.property: "form0"
  12.         section.delegate: Item {height: 10; width: parent.width; Text { text: section } }
  13.         delegate: Rectangle
  14.         {
  15.             height: 60
  16.             width: parent.width
  17.             color: "#E0E1E2"
  18.             Row
  19.             {
  20.                 height: parent.height
  21.                 width: parent.width - 10
  22.                 anchors.horizontalCenter: parent.horizontalCenter
  23.                 property real columnWidth: (width - 10) / 3
  24.                 property int rad: 10
  25.                 spacing: 5
  26.                 Rectangle
  27.                 {
  28.                     height: parent.height
  29.                     width: parent.columnWidth
  30.                     radius: parent.rad
  31.                     Text
  32.                     {
  33.                         anchors.centerIn: parent
  34.                         text: modelData.form0
  35.                     }
  36.                 }
  37.                 Rectangle
  38.                 {
  39.                     height: parent.height
  40.                     width: parent.columnWidth
  41.                     radius: parent.rad
  42.                     Text
  43.                     {
  44.                         anchors.centerIn: parent
  45.                         text: modelData.form1
  46.                         font.pointSize: 24
  47.                     }
  48.                 }
  49.                 Rectangle
  50.                 {
  51.                     height: parent.height
  52.                     width: parent.columnWidth
  53.                     radius: parent.rad
  54.                     Text
  55.                     {
  56.                         anchors.centerIn: parent
  57.                         text: modelData.form2
  58.                     }
  59.                 }
  60.             }
  61.         }
  62.     }
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All the forms (form0, form1, form2) are displayed in teh ListView, and all the model elements are displayed.
If there's too much code, let me know