X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=gtk2_ardour%2Fpanner_ui.cc;h=c04ca055b26f1d599bcd78bab761c3911ed1d6de;hb=4b5426eddefd742caa13f9539260ab97bc528a68;hp=7f1475fabc7b95a8f26c9d3e58d9e67bf650330b;hpb=cc8598b0712dfc756fd62f002b1fa1ea0e3cda25;p=ardour.git

diff --git a/gtk2_ardour/panner_ui.cc b/gtk2_ardour/panner_ui.cc
index 7f1475fabc..c04ca055b2 100644
--- a/gtk2_ardour/panner_ui.cc
+++ b/gtk2_ardour/panner_ui.cc
@@ -51,6 +51,7 @@ const int PannerUI::pan_bar_height = 30;
 
 PannerUI::PannerUI (Session& s)
 	: _session (s),
+	  _current_nouts (-1),
 	  hAdjustment(0.0, 0.0, 0.0),
 	  vAdjustment(0.0, 0.0, 0.0),
 	  panning_viewport(hAdjustment, vAdjustment),
@@ -154,7 +155,7 @@ PannerUI::set_panner (boost::shared_ptr<Panner> p)
  	connections.push_back (_panner->Changed.connect (mem_fun(*this, &PannerUI::panner_changed)));
  	connections.push_back (_panner->LinkStateChanged.connect (mem_fun(*this, &PannerUI::update_pan_linkage)));
  	connections.push_back (_panner->StateChanged.connect (mem_fun(*this, &PannerUI::update_pan_state)));
- 
+
 	setup_pan ();
 
 	pan_changed (0);
@@ -229,13 +230,13 @@ PannerUI::get_controllable()
 }
 
 bool
-PannerUI::panning_link_button_press (GdkEventButton* ev)
+PannerUI::panning_link_button_press (GdkEventButton*)
 {
 	return true;
 }
 
 bool
-PannerUI::panning_link_button_release (GdkEventButton* ev)
+PannerUI::panning_link_button_release (GdkEventButton*)
 {
 	if (!ignore_toggle) {
 		_panner->set_linked (!_panner->linked());
@@ -335,14 +336,20 @@ PannerUI::update_pan_state ()
 void
 PannerUI::setup_pan ()
 {
-	cerr << "Setup pan for " << _panner->name() << endl;
-
 	if (!_panner) {
 		return;
 	}
 
 	uint32_t nouts = _panner->nouts();
 
+	if (nouts == _current_nouts) {
+		return;
+	}
+
+	_current_nouts = nouts;
+
+	cout << "Setup pan for " << _panner->name() << endl;
+
 	if (nouts == 0 || nouts == 1) {
 
 		while (!pan_adjustments.empty()) {