X-Git-Url: https://git.lyx.org/gitweb/?a=blobdiff_plain;f=src%2Ffrontends%2Fscreen.C;h=6308730a2024b786afcee8824d1fa9721c2683fc;hb=ed0d2079b87e1b4ec20f4c46575f64cb9863658c;hp=834b96a5e32ab006c6a3fda4be8e28879806ec56;hpb=6c6c7dc9481c0aaa545ab649dd66e25a7d793c3f;p=lyx.git

diff --git a/src/frontends/screen.C b/src/frontends/screen.C
index 834b96a5e3..6308730a20 100644
--- a/src/frontends/screen.C
+++ b/src/frontends/screen.C
@@ -147,8 +147,14 @@ void LyXScreen::checkAndGreyOut()
 
 void LyXScreen::showCursor(BufferView & bv)
 {
-	// this is needed to make sure we copy back the right
-	// pixmap on the hide for the Qt frontend
+	// You are not expected to understand this. This forces Qt
+	// (the problem case) to deal with its event queue. This is
+	// necessary when holding down a key such as 'page down' or
+	// just typing: without this processing of the event queue,
+	// the cursor gets ahead of itself without a selection or
+	// workarea redraw having a chance to keep up. If you think
+	// you can remove this, try selecting text with the mouse
+	// in Qt, or holding Page Down on the User's Guide.
 	lyx_gui::sync_events();
 
 	if (cursor_visible_)