Save QMap and QWidgetList

[naax]

Hello.

In my program, I need to save QListWidget. I got this, all works (save and load) but is one problem. Every item on this QListWidget has special double variables and I don't know how I can save it and load.
After the open program, I want to load QListWidget with these actual variables for items.

void MainWindow::on_saveButton_clicked()
{

    // save
       QFile file("/Users/Alan/Desktop/QT Projects/Planner/save/MealOne.txt");
       if (file.open(QIODevice::WriteOnly | QIODevice::Text))
       {
           // bind it
           QTextStream stream(&file);

           for (int i = 0; i < ui->mealOneLeft->count(); i++)
           {
               QListWidgetItem *item = ui->mealOneLeft->item(i);
               stream << item->text() << '\n';
           }

           file.close();
       }

      
}

void MainWindow::on_loadButton_clicked()
{


    QFile file("/Users/Alan/Desktop/QT Projects/Planner/save/MealOne.txt");
    if (file.open(QIODevice::ReadOnly | QIODevice::Text))
    {
        // bind it
        QTextStream in(&file);


        while(!in.atEnd())
        {
            QString line = in.readLine();
            ui->mealOneLeft->addItem(line);

        }
        file.close();
    }

}

How I can save these variables and afterload them back override to QWidgetList items? I'm going in the right way?

[VRonin]

Saving in a text file loses the information regarding the original data type, all you can do is guess with trial and error

void MainWindow::on_loadButton_clicked()
{


    QFile file("/Users/Alan/Desktop/QT Projects/Planner/save/MealOne.txt");
    if (file.open(QIODevice::ReadOnly | QIODevice::Text))
    {
        // bind it
        QTextStream in(&file);


        while(!in.atEnd())
        {
            const QString line = in.readLine();
            QListWidgetItem* const newItem = new QListWidgetItem;
            bool checkConversion = false;
            newItem->setData(Qt::EditRole,val.toInt(&checkConversion));
            if (checkConversion){
                ui->mealOneLeft->addItem(newItem);
                continue;
            }
            newItem->setData(Qt::EditRole,val.toDouble(&checkConversion));
            if (checkConversion){
                ui->mealOneLeft->addItem(newItem);
                continue;
            }
            newItem->setData(Qt::EditRole,line);
            ui->mealOneLeft->addItem(newItem);
        }
        file.close();
    }

}

[naax]

@VRonin

//Creating new item
       ItemName[ItemID] = ui->addItemName->text();
       ItemKcals[ItemID] = ui->addItemKcal->value();
       ItemProteins[ItemID] = ui->addItemProtein->value();
       ItemFats[ItemID] = ui->addItemFat->value();
       ItemCarbons[ItemID] = ui->addItemCarbon->value();

       ui->mealOneLeft->addItem(ui->addItemName->text());

//Adding to map 
ItemMap.insert(ui->addItemName->text(), ItemID);
ItemID++;

So is creating a new item. He is added to mealOneLeft (QWidgetList) and name I can save/load, but I don't know what with these variables.

[Pablo J. Rogina]

@naax said in Save QMap and QWidgetList:

Every item on this QListWidget has special double variables and I don't know how I can save it and load.

Have you already considered using a database for storing/retrieving your data model?

Instead of resorting on text or settings files and do custom processing for load/save...

[naax]

@Pablo-J-Rogina

No, I haven't. It's my the first time where I'm using the load/save functions. Txt. was the first thing. Can you tell me what I should do?