Save QTableWidget

hannao

Hi
I use code

for( int r = 0; r < ui->tableWidget->rowCount(); ++r )
    {
        strList.clear();
        for( int c = 0; c < ui->tableWidget->columnCount(); ++c )
        {   QTableWidgetItem* item = ui->tableWidget->item(r,c);     
            if (!item || item->text().isEmpty())                        
            {
                ui->tableWidget->setItem(r,c,new QTableWidgetItem("0"));
            }
            strList << "\" "+ui->tableWidget->item( r, c )->text()+"\" ";

        }
        data << strList.join( ";" )+"\n";
    }

I have problem When I read(Open) file and write(save) file replace again (around 3 round).
But file has empty line.
Please help me .

mrjj

@hannao
Hi and welcome
so you save all rows as
col;col;col ?

So what is not working?
There is empty line ?
or nothing at all in file ?

hannao

Yes, when I save again agin again. This file is empty

mrjj

@hannao
can you show the load code ?

VRonin

I implemented something I consider relatively satisfying (even though there's a lot of room for improvement) here: https://github.com/VSRonin/Qt-Model-Serialisation/tree/dev (make sure you use the dev branch)

    CsvModelSerialiser serial; //create the serialiser
    serial->setModel(tableWidget->model()); // set the model to save
    serial->setCsvSeparator(";"); // use ; as separator
    QFile tempFile("TestSave"); // prepare the file to save
    if (!serial->saveModel(&tempFile)) // save the model to file
        Q_ASSERT(false);

to load it:

    CsvModelSerialiser serial; //create the serialiser
    serial->setModel(tableWidget->model()); // set the model to load
    serial->setCsvSeparator(";"); // use ; as separator
    QFile tempFile("TestSave"); // prepare the file to load
    if (!serial->loadModel(&tempFile)) // save the model to file
        Q_ASSERT(false);

hannao

Here I use.

void Finalline2::on_openButton_clicked()
{
    QString filename = QFileDialog::getOpenFileName(this,tr("Open Files"),"/home/pi/share/L2/Final Line",tr("Txt Files(*.txt)"));
    QFile file(filename);
    QStringList listA;
    int row=0;
    if(file.open(QIODevice::ReadOnly)){
        while(!file.atEnd()){
            QString line = file.readLine();
            listA = line.split(",");
            ui->tableWidget->setColumnCount(listA.size());
            ui->tableWidget->insertRow(row);
            for(int x = 0; x < listA.size() ; x++)
            {
                QTableWidgetItem *test = new QTableWidgetItem(listA.at(x));
                ui->tableWidget->setItem(row, x, test);
            }
            row++;
        }

    }
    file.close();
}

VRonin

@hannao said in [SOLVED] Save QTableWidget:

listA = line.split(",");

@hannao said in [SOLVED] Save QTableWidget:

data << strList.join( ";" )+"\n";

I see something weird going on here

@hannao said in [SOLVED] Save QTableWidget:

if(file.open(QIODevice::ReadOnly)){

If the file is text you should use the text flag if(file.open(QIODevice::ReadOnly | QIODevice::Text)){

hannao

@VRonin
I'm sorry. Real I use listA = line.split(" , ");

VRonin

@hannao said in [SOLVED] Save QTableWidget:

I use listA = line.split(" , ");

It's still different from the save code

Did you try using my code?

You just have to copy everything excluding model_serialisation_global.h into your folder and add DEFINES += QT_MODEL_SERIALISATION_EXPORT to your pro file (I know this is not ideal but if it's still in the dev branch there are reasons)

hannao

@VRonin
I use Qt on Rasberry pi3
but normally when I install use
qmake
make
make install
but I don't how to install model_serialisation . please suggestion to me.

VRonin

No, do not bother building the library (in fact I don't think it will work as I miss the .pro file altogether). Just copy everything excluding model_serialisation_global.h in your project and add the sources to your project.