rollback to 3428, before the mysterious removal of libs/* at 3431/3432

git-svn-id: svn://localhost/ardour2/branches/3.0@3435 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 73 insertions, 0 deletions

diff --git a/libs/gtkmm2ext/idle_adjustment.cc b/libs/gtkmm2ext/idle_adjustment.cc
new file mode 100644
index 0000000000..3e3a3da566
--- /dev/null
+++ b/libs/gtkmm2ext/idle_adjustment.cc
@@ -0,0 +1,73 @@
+/*
+    Copyright (C) 2000-2007 Paul Davis 
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#define _BSD_SOURCE
+#include <gtkmm2ext/idle_adjustment.h>
+#include <gtkmm/main.h>
+#include <iostream>
+
+using namespace Gtk;
+using namespace sigc;
+using namespace Gtkmm2ext;
+
+IdleAdjustment::IdleAdjustment (Gtk::Adjustment& adj)
+{
+	adj.signal_value_changed().connect (mem_fun (*this, &IdleAdjustment::underlying_adjustment_value_changed));
+	timeout_queued = 0;
+	gettimeofday (&last_vc, 0);
+}
+
+IdleAdjustment::~IdleAdjustment ()
+{
+}
+
+void
+IdleAdjustment::underlying_adjustment_value_changed ()
+{
+	gettimeofday (&last_vc, 0);
+	
+	if (timeout_queued) {
+		return;
+	}
+
+	Glib::signal_timeout().connect(mem_fun(*this, &IdleAdjustment::timeout_handler), 250);
+	timeout_queued = true;
+}	
+
+gint
+IdleAdjustment::timeout_handler ()
+{
+	struct timeval now;
+	struct timeval tdiff;
+
+	gettimeofday (&now, 0);
+
+	timersub (&now, &last_vc, &tdiff);
+
+	std::cerr << "timer elapsed, diff = " << tdiff.tv_sec << " + " << tdiff.tv_usec << std::endl;
+
+	if (tdiff.tv_sec > 0 || tdiff.tv_usec > 250000) {
+		std::cerr << "send signal\n";
+		value_changed ();
+		timeout_queued = false;
+		return FALSE;
+	} else {
+		return TRUE;
+	}
+}