QPlainTextEdit::toPlainText() but include newline characters from word wrap

Question

I have a QPlainTextEdit that contains some text. Word wrap is enabled.

When I retrieve the text with toPlainText() the resulting string does not contain the newline characters created from word wrap. This is because those newline characters weren't directly entered by the user.

I would like to retain those newline characters that word wrap created. How does one do this?

For example:

Add QPlainTextEdit widget to the window and fill it with enough text for word wrap to create new lines.

Output that text to file:

QString myText = ui->plainTextEdit->toPlainText();

QFile outputFile("test.txt");
outputFile.open(QIODevice::WriteOnly);
outputFile.write(myText.toUtf8());
outputFile.close();

The resulting output is just 1 line.

How can I retain the newline characters word wrap simulates?

You probably need to do this yourself. You need QFontMerics, and font used and line width in pixels from your QPlainTextEdit. — hyde, Aug 14 '18 at 03:46
Did you wrote the single line in QPlainTextEdit? if you want to output multi-line, then using Enter key. _does not contain the newline characters_. Have you checked the return of `toPlainText()`? — JustWe, Aug 14 '18 at 08:30
Yes it's a single line written without the use of the Enter key. But I want the output string to contain all newline characters that word wrap simulates. — mrg95, Aug 14 '18 at 17:12

BattleTested_закалённый в бою · Answer 1 · 2018-08-14T03:53:34.307

I make offer use of QTextEdit instead of QPlainTextEdit, because its easy to access what you want (It does work) :

Drag a QTextEdit control on widget
Select it, and change lineWrapMode option to FixedColumnWidth (in properties section)
Then, set lineWrapColumnOrWidth option to (your arbitrary line length when wrapped e.g. 10)
Now fill QTextEdit, So you can see what you expected!

Now try this for get QTextEdit data line by line ("textEdit" is as QTextEdit) :

// QTextEdit content
QString strLines = ui->textEdit->toPlainText();

// line count of QTextEdit
int lineCount = strLines.length() / ui->textEdit->lineWrapColumnOrWidth();
int lineLength = ui->textEdit->lineWrapColumnOrWidth();

for(int i = 0; i < lineCount; i++) {

    QMessageBox::information(this, "", strLines.mid(i * lineLength, lineLength));
}

And for splitting real \n You can try :

QString.split(QRegExp("[\r\n]"),QString::SkipEmptyParts);

This statement splits the string whenever any of the newline character.

Wouldn't this cut off words right in the middle though? Word wrap keeps entire words together when it moves to a new line. I need the newline characters that exist between words, not just character count. — mrg95, Aug 13 '18 at 22:11
@mrg95 I edited my answer, attention about last sentences i appended in my answer — BattleTested_закалённый в бою, Aug 14 '18 at 03:55

QPlainTextEdit::toPlainText() but include newline characters from word wrap

1 Answers1