3 files changed, 125 insertions, 2 deletions
diff --git a/gr-qtgui/lib/Makefile.am b/gr-qtgui/lib/Makefile.am
index f9b5dd03e..26c9e64aa 100644
--- a/gr-qtgui/lib/Makefile.am
+++ b/gr-qtgui/lib/Makefile.am
@@ -53,7 +53,8 @@ libgnuradio_qtgui_la_SOURCES = 	\
 	spectrumUpdateEvents.cc			\
 	plot_waterfall.cc			\
 	qtgui_sink_c.cc				\
-	qtgui_sink_f.cc
+	qtgui_sink_f.cc				\
+	qtgui_util.cc
 
 nodist_libgnuradio_qtgui_la_SOURCES=$(QMAKE_SOURCES)
 
@@ -70,7 +71,8 @@ grinclude_HEADERS =			\
 	SpectrumGUIClass.h		\
 	spectrumUpdateEvents.h		\
 	qtgui_sink_c.h			\
-	qtgui_sink_f.h
+	qtgui_sink_f.h			\
+	qtgui_util.h
 
 #QT_MOC_FLAGS=-DQT_SHARED -DQT_NO_DEBUG -DQT_OPENGL_LIB -DQT_GUI_LIB -DQT_CORE_LIB
 QT_MOC_FLAGS=-DQT_SHARED -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB
diff --git a/gr-qtgui/lib/qtgui_util.cc b/gr-qtgui/lib/qtgui_util.cc
new file mode 100644
index 000000000..87b90997a
--- /dev/null
+++ b/gr-qtgui/lib/qtgui_util.cc
@@ -0,0 +1,71 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2008,2009 Free Software Foundation, Inc.
+ *
+ * This file is part of GNU Radio
+ *
+ * GNU Radio 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 3, or (at your option)
+ * any later version.
+ *
+ * GNU Radio 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 GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#include <qtgui_util.h>
+
+QwtPickerDblClickPointMachine::QwtPickerDblClickPointMachine()
+    : QwtPickerMachine ()
+{
+
+}
+
+QwtPickerDblClickPointMachine::~QwtPickerDblClickPointMachine()
+{
+
+}
+
+QwtPickerMachine::CommandList
+QwtPickerDblClickPointMachine::transition(const QwtEventPattern &eventPattern,
+					  const QEvent *e)
+{
+  QwtPickerMachine::CommandList cmdList;
+  switch(e->type()) {
+    case QEvent::MouseButtonDblClick:
+      if ( eventPattern.mouseMatch(QwtEventPattern::MouseSelect1,
+				   (const QMouseEvent *)e) ) {
+	cmdList += QwtPickerMachine::Begin;
+	cmdList += QwtPickerMachine::Append;
+	cmdList += QwtPickerMachine::End;
+      }
+      break;
+  default:
+    break;
+  }
+  return cmdList;
+}
+
+QwtDblClickPlotPicker::QwtDblClickPlotPicker(QwtPlotCanvas* canvas)
+  : QwtPlotPicker(canvas)
+{
+  setSelectionFlags(QwtPicker::PointSelection);
+}
+
+QwtDblClickPlotPicker::~QwtDblClickPlotPicker()
+{
+}
+
+QwtPickerMachine*
+QwtDblClickPlotPicker::stateMachine(int n) const
+{
+  return new QwtPickerDblClickPointMachine;
+}
+
diff --git a/gr-qtgui/lib/qtgui_util.h b/gr-qtgui/lib/qtgui_util.h
new file mode 100644
index 000000000..a519c66a2
--- /dev/null
+++ b/gr-qtgui/lib/qtgui_util.h
@@ -0,0 +1,50 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2011 Free Software Foundation, Inc.
+ *
+ * This file is part of GNU Radio
+ *
+ * GNU Radio 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 3, or (at your option)
+ * any later version.
+ *
+ * GNU Radio 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 GNU Radio; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef INCLUDED_QTGUI_UTIL_H
+#define INCLUDED_QTGUI_UTIL_H
+
+#include <qevent.h>
+
+#include <qwt_plot_picker.h>
+#include <qwt_picker_machine.h>
+
+
+class QwtDblClickPlotPicker: public QwtPlotPicker
+{
+public:
+    QwtDblClickPlotPicker(QwtPlotCanvas *);
+    ~QwtDblClickPlotPicker();
+
+    virtual QwtPickerMachine * stateMachine(int) const;
+};
+
+class QwtPickerDblClickPointMachine: public QwtPickerMachine
+{
+public:
+  QwtPickerDblClickPointMachine();
+  ~QwtPickerDblClickPointMachine();
+  
+  virtual CommandList transition( const QwtEventPattern &eventPattern, const QEvent *e);
+};
+
+#endif /* INCLUDED_QTGUI_UTIL_H */