From 6d7115bb60fcc974a7b3b74f64665a5715dadddc Mon Sep 17 00:00:00 2001
From: Dekel Tsur <dekelts@tau.ac.il>
Date: Thu, 7 Nov 2002 22:46:30 +0000
Subject: [PATCH] Fix X selection code.

git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@5600 a592a061-630c-0410-9148-cb99ea01b6c8
---
 src/frontends/qt2/ChangeLog   |  5 ++++
 src/frontends/qt2/QWorkArea.C | 48 +++++++++++++++++++++++++++++++++--
 src/frontends/qt2/lyx_gui.C   | 22 +++++++++++++++-
 3 files changed, 72 insertions(+), 3 deletions(-)

diff --git a/src/frontends/qt2/ChangeLog b/src/frontends/qt2/ChangeLog
index 75912fa308..77ce125df9 100644
--- a/src/frontends/qt2/ChangeLog
+++ b/src/frontends/qt2/ChangeLog
@@ -1,3 +1,8 @@
+2002-11-08  Dekel Tsur  <dekelts@tau.ac.il>
+
+	* lyx_gui.C:
+	* QWorkArea.C: Fix X selection code.
+
 2002-11-07  John Levon  <levon@movementarian.org>
 
 	* ui/QIncludeDialog.ui:
diff --git a/src/frontends/qt2/QWorkArea.C b/src/frontends/qt2/QWorkArea.C
index 15af3200e3..3c3d8197c3 100644
--- a/src/frontends/qt2/QWorkArea.C
+++ b/src/frontends/qt2/QWorkArea.C
@@ -31,6 +31,10 @@
 #include <qlayout.h>
 #include <qclipboard.h>
 
+#ifdef Q_WS_X11
+#include <X11/Xlib.h>
+#endif
+
 #include <cmath>
 #include <cctype>
 
@@ -79,15 +83,52 @@ void QWorkArea::setScrollbarParams(int h, int pos, int line_h)
 	scrollbar_->setPageStep(height());
 }
 
+namespace {
+QWorkArea const * wa_ptr = 0;
+}
+
+#ifdef Q_WS_X11
+bool lyxX11EventFilter(XEvent * xev)
+{
+	switch (xev->type) {
+	case SelectionRequest:
+		lyxerr[Debug::GUI] << "X requested selection." << endl;
+		if (wa_ptr)
+			wa_ptr->selectionRequested();
+		break;
+	case SelectionClear:
+		lyxerr[Debug::GUI] << "Lost selection." << endl;
+		if (wa_ptr)
+			wa_ptr->selectionLost();
+		break;
+	}
+	return false;
+}
+#endif
 
-void QWorkArea::haveSelection(bool) const
+void QWorkArea::haveSelection(bool own) const
 {
-	// not possible in Qt !
+	wa_ptr = this;
+
+#if QT_VERSION >= 300
+	if (!QApplication::clipboard()->supportsSelection())
+		return;
+
+	if (own) {
+		QApplication::clipboard()->setSelectionMode(true);
+		QApplication::clipboard()->setText(QString());
+	}
+	// We don't need to do anything if own = false, as this case is
+	// handled by QT.
+#endif
 }
 
 
 string const QWorkArea::getClipboard() const
 {
+#if QT_VERSION >= 300
+	QApplication::clipboard()->setSelectionMode(true);
+#endif
 	QString str = QApplication::clipboard()->text();
 	if (str.isNull())
 		return string();
@@ -97,5 +138,8 @@ string const QWorkArea::getClipboard() const
 
 void QWorkArea::putClipboard(string const & str) const
 {
+#if QT_VERSION >= 300
+	QApplication::clipboard()->setSelectionMode(true);
+#endif
 	QApplication::clipboard()->setText(str.c_str());
 }
diff --git a/src/frontends/qt2/lyx_gui.C b/src/frontends/qt2/lyx_gui.C
index ce2c78a888..c64afc720f 100644
--- a/src/frontends/qt2/lyx_gui.C
+++ b/src/frontends/qt2/lyx_gui.C
@@ -78,10 +78,30 @@ map<int, io_callback *> io_callbacks;
 // FIXME: wrong place !
 LyXServer * lyxserver;
 
+#ifdef Q_WS_X11
+extern bool lyxX11EventFilter(XEvent * xev);
+#endif
+
+class LQApplication : public QApplication
+{
+public:
+	LQApplication(int &argc, char **argv);
+	~LQApplication();
+#ifdef Q_WS_X11
+	bool x11EventFilter (XEvent * ev) { return lyxX11EventFilter(ev); }
+#endif
+};
+
+LQApplication::LQApplication(int &argc, char **argv)
+	: QApplication( argc, argv )
+{}
+
+LQApplication::~LQApplication()
+{}
 
 void lyx_gui::parse_init(int & argc, char * argv[])
 {
-	static QApplication a(argc, argv);
+	static LQApplication a(argc, argv);
 
 	using namespace grfx;
 
-- 
2.39.2