How to retrieve text ?

Anonymous_Banned275

I have some understanding of the concept , but I really need step by step explanation what is the code doing.
I have look at few examples and they do not explain what each class in trying to do .
And things are more confusing since my code is already running in QTextEdit object.
It would help to know what is each lineof code doing. At this point I am not concerned if the code copiles , I just need
verbal desription of each.

QTextDocument instance does ... ( links to actuall QTextEdit "text" ? If so how ? )
QTextCurson instance does... ( links to instance of QTextDocument physical cursor ?
etc ....

  QTextDocument *document = new QTextDocument();
  QTextCursor cursor(document);
 // put visible cursor to the end of the line
  QTextCursor cursor = QTextEdit::textCursor();
  cursor.movePosition(QTextCursor::StartOfLine); //::End);
  setTextCursor(cursor);

ChrisW67

QTextDocument *document = new QTextDocument();  
// ^^^ a new empty QTextDocument

QTextCursor cursor(document); 
// ^^^ an object that represents  position in the text of the document above (there is none)

// put visible cursor to the end of the line
//     ^^^ A QTextDocument is an in-memory structure representing a document, there is no "visible"

QTextCursor cursor = QTextEdit::textCursor();
// ^^^ This should not compile, there is no static QTextEdit::textCursor()
// If you went:
QTextCursor cursor = textEdit->textCursor();
// then you would have an object that represented a location within the document that 
// the text edit is currently displaying a visible cursor at.  
// This is *not* the document created above.
// The QTextDocument being displayed by a QTextEdit is obtained with textEdit->document()
// https://doc.qt.io/qt-6/qtextedit.html#document-prop

cursor.movePosition(QTextCursor::StartOfLine);
// Move the cursor object to point at the start of the line in the QTextDocument 
// object it is related to.  
// This does *not* move the visible cursor in the QTextEdit.

setTextCursor(cursor);
// Assuming this is called on the textEdit object then the visible cursor should
// move to the location corresponding to the cursor object's location in the document.
// In this case, where the start of the document line is present on the screen.
// A document line , and a line on screen, do not necessarily mean the same thing 
// because a single document line can be wrapped.

Nothing in this code retrieves text, so I do not see how it is related to the question posed in the title.