Question about the tutorial on Code Editor from QtProject
I read this tutorial on how to make a code editor based on a QPlainTextEdit : https://qt-project.org/doc/qt-4.8/widgets-codeeditor.html
But I didn't get the roleplay of a variable :
@void CodeEditor::updateLineNumberArea(const QRect &rect, int dy)
lineNumberArea->update(0, rect.y(), lineNumberArea->width(), rect.height());
if (rect.contains(viewport()->rect())) updateLineNumberAreaWidth(0);
What's the role of the "dy" variable ?
I dont get it.
Thanks in advance. ;)
dy carries the amount of pixels the viewport was scrolled, see "QPlainTextEdit::updateRequest":https://qt-project.org/doc/qt-4.8/qplaintextedit.html#updateRequest