problem with Hebrew font in a control

[Lykurg]

Hi,

there is some strangeness inside you code (at least for me...). I still can say: use utf8 since Qt use that codec. Make sure you have configured Qt Creator to use utf8!
Also QTextCodec was not used correct:

void MainReader::on_pushButton_clicked()
{
    QFile file(ui->lineEdit->text());
    if(file.open(QIODevice::ReadOnly | QIODevice::Text))
{
    QTextStream in(&file);
    in.setCodec("Windows-1255");
    QString line = in.readAll();
    ui->textEdit->append(line);
}
}
 
void MainReader::on_pushButton_2_clicked()
{
	ui->textEdit->append(trUtf8("נסיון"));
}

void MainReader::on_pushButton_clicked()
{
    QFile file(ui->lineEdit->text());
    if(file.open(QIODevice::ReadOnly | QIODevice::Text))
{
    QTextStream in(&file);
    in.setCodec("Windows-1255");
    QString line = in.readAll();
    ui->textEdit->append(line);
}
}

void MainReader::on_pushButton_2_clicked()
{
	ui->textEdit->append(trUtf8("נסיון"));
}

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and with the button no problem at all. And as a further suggestion: Have a look at the layout mechanism. QHBoxLayout etc.