CODEWITHSUNDEEP
qt
Niunzin
Niunzin

Reputation: 45

Replace text from a specific line

I'm trying to replace the text of a specific line, but got no success. (i'd searched a lot, but i don't found nothing)

something like:

hello
my
friend!

replacing line 2 to some text:

hello
AEEEHO NEW LINE TEXT
friend!

I created a QStringList and tried to read the text line by line and add to this list by changing just the line, but without success.

        int line = 1; // to change the second line
        QString newline = "my new text";
        QStringList temp;

        int i = 0;
        foreach(QString curlineSTR, internalCode.split('\n'))
        {
            if(line == i)
                temp << newline;
            else
                temp << curlineSTR;
            i++;
        }

        internalCode = "";
        foreach(QString txt, temp)
            internalCode.append(QString("%1\n").arg(txt));

Upvotes: 0

Views: 679

Answers (1)

Antonio Dias
Antonio Dias

Reputation: 2881

I belive that you are looking for QRegExp to deal with newline and do something like this:

QString internalcode = "hello\nmy\nfriend!";

int line = 1; // to change the second line
QString newline = "another text";

// Split by newline command
QStringList temp = internalcode.split(QRegExp("\n|\r\n|\r"));
internalcode.clear();

for (int i = 0; i < temp.size(); i++)
{
    if (line == i)
        internalcode.append(QString("%0\n").arg(newline));
    else
        internalcode.append(QString("%0\n").arg(temp.at(i)));
}

//Use this to remove the last newline command
internalcode = internalcode.trimmed();

qDebug() << internalcode;

And the output:

"hello
another text
friend!"

Upvotes: 2

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