QML: GridView does not update after change its model in C++

Question

My starting point is the following QML source, where GridView is showing ListModel with nice animation of item swaps:

import QtQuick 1.1
GridView {
    id: m         


        

Answer 1

I found the solution. Here is the working code (thanks Borut123 for suggestions).

class MyTable : public QStandardItemModel
{
private:
    Q_OBJECT
public:
    explicit MyTable(QObject *parent = 0) : QStandardItemModel(parent) {}
    Q_INVOKABLE void createModel();
    Q_INVOKABLE void moveItem(int inx1, int inx2);
    Q_INVOKABLE void listItems();
};

void MyTable::createModel()
{
    for (unsigned int i=0; i<20; i++) {
        QStandardItem* item = new QStandardItem(QString("%1").arg(i));
        appendRow(item);
    }
}

void MyTable::moveItem(int inx1, int inx2) {
    bool ok = false;
    if (inx1 < inx2) ok = beginMoveRows(QModelIndex(),inx1,inx1,QModelIndex(),inx2+1);
    if (inx1 > inx2) ok = beginMoveRows(QModelIndex(),inx1,inx1,QModelIndex(),inx2);
    if (!ok) return;
    QStandardItem* tmp1 = takeItem(inx1);
    if (inx1<inx2) {
        for (int i=inx1; i<inx2; i++) {
            QStandardItem* tmp2 = takeItem(i+1);
            setItem(i,tmp2);
        }
    } else if (inx2<inx1) {
        for (int i=inx1; i>inx2; i--) {
            QStandardItem* tmp2 = takeItem(i-1);
            setItem(i,tmp2);
        }
    }
    setItem(inx2,tmp1);
    endMoveRows();
}

void MyTable::listItems() {
    qDebug() << "LIST OF ITEMS";
    for (unsigned int i=0; i<20; i++) {
        qDebug() << QString("table[%1]=%2").arg(i).arg(item(i)->text()).toAscii().data();
    }
}