Moves the cursor up one line. If mark is TRUE, the text is marked. Deletes the character on the right side of the text cursor. Handles drag leave events, cancelling any auto-scrolling. Reimplemented from QWidget.
Handles drag motion events, accepting text and positioning the cursor.
Reimplemented from QWidget. Handles drop events, pasting text. Reimplemented from QWidget. Moves the text cursor to the right end of the line. If mark is TRUE text is marked towards the last position.