From e8fc8aa992f7fad798935de227e2a15d0a075c71 Mon Sep 17 00:00:00 2001
From: Paul Davis <paul@linuxaudiosystems.com>
Date: Mon, 30 Jun 2014 16:32:38 -0400
Subject: [PATCH] new UI config var to allow playhead to be optionally
 draggable (default is: yes, it can be dragged)

---
 gtk2_ardour/editor.cc           | 12 +++++++++++-
 gtk2_ardour/editor_cursors.cc   |  6 ++++++
 gtk2_ardour/editor_cursors.h    |  1 +
 gtk2_ardour/rc_option_editor.cc |  8 ++++++++
 gtk2_ardour/ui_config_vars.h    |  1 +
 5 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/gtk2_ardour/editor.cc b/gtk2_ardour/editor.cc
index 042d03fa57..a837a5a429 100644
--- a/gtk2_ardour/editor.cc
+++ b/gtk2_ardour/editor.cc
@@ -121,6 +121,7 @@
 #include "tempo_lines.h"
 #include "time_axis_view.h"
 #include "utils.h"
+#include "verbose_cursor.h"
 
 #include "i18n.h"
 
@@ -760,9 +761,14 @@ Editor::Editor ()
         }
 
 	constructed = true;
-	instant_save ();
+
+	/* grab current parameter state */
+	boost::function<void (string)> pc (boost::bind (&Editor::ui_parameter_changed, this, _1));
+	ARDOUR_UI::config()->map_parameters (pc);
 
 	setup_fade_images ();
+
+	instant_save ();
 }
 
 Editor::~Editor()
@@ -5506,5 +5512,9 @@ Editor::ui_parameter_changed (string parameter)
 			_cursor_stack.pop();
 		}
 		_cursors->set_cursor_set (ARDOUR_UI::config()->get_icon_set());
+	} else if (parameter == "draggable-playhead") {
+		if (_verbose_cursor) {
+			playhead_cursor->set_sensitive (ARDOUR_UI::config()->get_draggable_playhead());
+		}
 	}
 }
diff --git a/gtk2_ardour/editor_cursors.cc b/gtk2_ardour/editor_cursors.cc
index 12dab1e83d..ffe6fc0d01 100644
--- a/gtk2_ardour/editor_cursors.cc
+++ b/gtk2_ardour/editor_cursors.cc
@@ -88,3 +88,9 @@ EditorCursor::set_color (ArdourCanvas::Color color)
 {
 	_track_canvas_item->set_color (color);
 }
+
+void
+EditorCursor::set_sensitive (bool yn)
+{
+	_track_canvas_item->set_ignore_events (!yn);
+}
diff --git a/gtk2_ardour/editor_cursors.h b/gtk2_ardour/editor_cursors.h
index 7915e37205..50958d1ac0 100644
--- a/gtk2_ardour/editor_cursors.h
+++ b/gtk2_ardour/editor_cursors.h
@@ -37,6 +37,7 @@ class EditorCursor {
 	void show ();
 	void hide ();
 	void set_color (ArdourCanvas::Color);
+	void set_sensitive (bool);
 
 	framepos_t current_frame () const {
 		return _current_frame;
diff --git a/gtk2_ardour/rc_option_editor.cc b/gtk2_ardour/rc_option_editor.cc
index 8643bf136a..c843276683 100644
--- a/gtk2_ardour/rc_option_editor.cc
+++ b/gtk2_ardour/rc_option_editor.cc
@@ -2140,6 +2140,14 @@ RCOptionEditor::RCOptionEditor ()
 
 	/* INTERFACE */
 
+	add_option (S_("Preferences|GUI"),
+	     new BoolOption (
+		     "draggable-playhead",
+		     _("Allow dragging of playhead"),
+		     sigc::mem_fun (*ARDOUR_UI::config(), &UIConfiguration::get_draggable_playhead),
+		     sigc::mem_fun (*ARDOUR_UI::config(), &UIConfiguration::set_draggable_playhead)
+		     ));
+
 	add_option (S_("Preferences|GUI"),
 	     new BoolOption (
 		     "widget-prelight",
diff --git a/gtk2_ardour/ui_config_vars.h b/gtk2_ardour/ui_config_vars.h
index e2141128cf..44c2837abe 100644
--- a/gtk2_ardour/ui_config_vars.h
+++ b/gtk2_ardour/ui_config_vars.h
@@ -26,4 +26,5 @@ UI_CONFIG_VARIABLE(bool, all_floating_windows_are_dialogs, "all-floating-windows
 UI_CONFIG_VARIABLE (bool, color_regions_using_track_color, "color-regions-using-track-color", false)
 UI_CONFIG_VARIABLE (bool, show_waveform_clipping, "show-waveform-clipping", true)
 UI_CONFIG_VARIABLE (uint32_t, lock_gui_after_seconds, "lock-gui-after-seconds", 0)
+UI_CONFIG_VARIABLE (bool, draggable_playhead, "draggable-playhead", true)