Trying to select one line in QPlainTextEdit using QTextCursor

[Rajarshi]

I am trying to select line by line and highlight in QPlainTextEdit but I cannot. My code looks like the following below:

text = new QPlainTextEdit();
text->setReadOnly(true);
text->setObjectName("text");

QTextCursor cursor(text->textCursor());

cursor.movePosition(QTextCursor::Start,QTextCursor::KeepAnchor);
cursor.movePosition(QTextCursor::Down, QTextCursor::KeepAnchor);
cursor.movePosition(QTextCursor::EndOfLine, QTextCursor::KeepAnchor);
QTextCharFormat format;
format.setFontWeight(QFont::Bold);
QString s = text->textCursor().selectedText();
s = cursor.selectedText();
string h = s.toStdString();
cout<<h<<endl;
I am trying to print string h but it always comes empty and cannot anything in the QPlainTextEdit

[aha_1980]

Hi @Rajarshi,

if what you gave is is your real code, than it cannot print anything because text is empty. You set an objectName, but never fill the content.

Regards

[Rajarshi]

@aha_1980 But my text is not empty though. I am putting text into the box

[aha_1980]

@Rajarshi said in Trying to select one line in QPlainTextEdit using QTextCursor:

@aha_1980 But my text is not empty though. I am putting text into the box

But where? I don't see it in your code so I can't comment on your code.

[mrjj]

Hi
This color the line red. ( where cursor are located)

void MainWindow::on_pushButton_clicked() {
  QTextCursor cur = ui->textEdit->textCursor();
  QTextBlockFormat f;
  f.setBackground(Qt::red);
  cur.select(QTextCursor::LineUnderCursor);
  cur.setBlockFormat(f);
}

If you don't move the cursor. it will highlight line 1 (0)