Text processing in QTextEdit

Troyer

Hi!
I Made it possible to take text from a file and encountered a problem:
I need to find and output in reverse alphabetical order the vowel letters from each line.
Most likely, i need to solve this through an array of characters to take from the string. But how to implement it?

void MainWindow::on_pushButton_clicked()
{
    QFile file("F:/Labs/Text/Text.txt");
        if(file.open(QIODevice::ReadOnly))
        {
            QTextStream stream(&file);
            QString str = stream.readAll();
            ui->textEdit->setText(str);
            file.close();
        }

}

Bonnie

I don't understand your need.
But if you want to read the file line by line, you could use

while(!stream.atEnd()) {
    str = stream.readLine();
    ui->textEdit->append(str);
}

Troyer

@Bonnie I took the text from a file and put it in QTextEdit, and now I need to somehow output in reverse alphabetical order the vowel letters from each line of this text

Bonnie

@Troyer
Sorry I don't understand that sentence. Maybe my English is not good enough. :(
Do you have any example of the input and output text?

mrjj

Hi
If i understood correctly then something like this.

void Test()
{

    QString line("the hens ate the wolves under the brigde");
    QList<QChar> vowels;
    for (int i = 0; i < line.length(); ++i) {
        QCharRef letter(line[i]);
        if (    letter == 'a' || letter == 'e' || letter == 'i' ||
                letter == 'o' || letter == 'u' || letter == 'A' ||
                letter == 'E' || letter == 'I' || letter == 'O' ||
                letter == 'U') {
            vowels.push_back(letter);
        }
    }

    std::sort( vowels.begin(), vowels.end(), [](QChar & p1, QChar & p2) {
        return p1 > p2;
    } );

    for (QChar &item : vowels) {
        qDebug() << "=" << item;
    }
}

= 'u'
= 'o'
= 'i'
= 'e'
= 'e'
= 'e'
= 'e'
= 'e'
= 'e'
= 'e'
= 'e'
= 'a'

Troyer

@mrjj
Yes. Thanks a million!

mrjj

@Troyer
Np, do note that is not the most pretty way. the vowels could be in a list and so on and we use
QChar to store it which might be overkill if only ascii but for a smaller text file it wont really matter.

Troyer

@mrjj Hello again!
I still find it difficult to analyze your code, I'm not professional enough yet :)
And I would like to ask you one more question. I need to output all characters in QTextEdit, not in the app console (you use QDebug for this)
I tried converting all the characters to a string and then just output the text: ui - >textEdit - >setText(str), but failed. What should I do now?
(Sorry for my English, not my main one)

jsulm

@Troyer said in Text processing in QTextEdit:

but failed

In what way failed? What happened? Can you show the code?

Troyer

@jsulm Already solved the problem)

Pablo J. Rogina

@Troyer said in Text processing in QTextEdit:

Already solved the problem)

would you mind sharing the solution?

in addition, please don't forget to mark your post as solved!

Troyer

@Pablo-J-Rogina
Yes, of course. All i had to do was add "append" :)

                for (QChar &item : vowels) {
                    ui->textEdit_2->append(item);
                }