From: Peter Kümmel <syntheticpp@gmx.net>
Date: Sat, 2 Jun 2007 07:58:11 +0000 (+0000)
Subject: fix scrolling bug: 3320 and 3652, maybe not perfect
X-Git-Tag: 1.6.10~9517
X-Git-Url: https://git.lyx.org/gitweb/?a=commitdiff_plain;h=d582d487ff9c390a54dbfb0b5ba1345e4599dc6c;p=features.git

fix scrolling bug: 3320 and 3652, maybe not perfect

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@18629 a592a061-630c-0410-9148-cb99ea01b6c8
---

diff --git a/src/frontends/qt4/GuiWorkArea.cpp b/src/frontends/qt4/GuiWorkArea.cpp
index 7ae001d2ec..4dbe5ab66c 100644
--- a/src/frontends/qt4/GuiWorkArea.cpp
+++ b/src/frontends/qt4/GuiWorkArea.cpp
@@ -48,6 +48,11 @@
 #include <boost/bind.hpp>
 #include <boost/current_function.hpp>
 
+#ifdef Q_WS_X11
+#include <QX11Info>
+extern "C" int XEventsQueued(Display *display, int mode);
+#endif
+
 #ifdef Q_WS_WIN
 int const CursorWidth = 2;
 #else
@@ -234,6 +239,7 @@ void GuiWorkArea::setScrollbarParams(int h, int scroll_pos, int scroll_line_step
 void GuiWorkArea::adjustViewWithScrollBar(int)
 {
 	scrollBufferView(verticalScrollBar()->sliderPosition());
+	QApplication::syncX();
 }
 
 
@@ -414,6 +420,19 @@ void GuiWorkArea::generateSyntheticMouseEvent()
 
 void GuiWorkArea::keyPressEvent(QKeyEvent * e)
 {
+	// do nothing if there are other events
+	// (the auto repeated events come too fast)
+	// \todo FIXME: remove hard coded Qt keysprocess the key binding
+#ifdef Q_WS_X11
+	if (XEventsQueued(QX11Info::display(), 0) > 1	&& e->isAutoRepeat() 
+			&& (Qt::Key_PageDown || Qt::Key_PageUp)) {
+		LYXERR(Debug::KEY)	
+			<< BOOST_CURRENT_FUNCTION << endl
+			<< "sysstem is busy: scroll key event ignored" << endl;
+		e->ignore();
+		return;
+	}
+#endif
 
 	LYXERR(Debug::KEY) << BOOST_CURRENT_FUNCTION
 		<< " count=" << e->count()