From 54812f0de156d05a911b2a9c1d4c482d64d2ec1f Mon Sep 17 00:00:00 2001
From: Jakob Ketterl <jakob.ketterl@gmx.de>
Date: Sat, 2 May 2020 02:32:49 +0200
Subject: [PATCH] fix band changes

---
 htdocs/lib/DemodulatorPanel.js | 16 ++++++++++++++--
 htdocs/openwebrx.js            |  1 +
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/htdocs/lib/DemodulatorPanel.js b/htdocs/lib/DemodulatorPanel.js
index a3a6ca8..aa8de15 100644
--- a/htdocs/lib/DemodulatorPanel.js
+++ b/htdocs/lib/DemodulatorPanel.js
@@ -6,7 +6,7 @@ function DemodulatorPanel(el) {
     var displayEl = el.find('.webrx-actual-freq')
     this.tuneableFrequencyDisplay = displayEl.tuneableFrequencyDisplay();
     displayEl.on('frequencychange', function(event, freq) {
-        self.getDemodulator().set_offset_frequency(freq - center_freq);
+        self.getDemodulator().set_offset_frequency(freq - self.center_freq);
     });
 
     Modes.registerModePanel(this);
@@ -101,7 +101,7 @@ DemodulatorPanel.prototype.setMode = function(modulation) {
         this.demodulator = new Demodulator(current_offset_frequency, modulation);
         var self = this;
         this.demodulator.on("frequencychange", function(freq) {
-            self.tuneableFrequencyDisplay.setFrequency(center_freq + freq);
+            self.tuneableFrequencyDisplay.setFrequency(self.center_freq + freq);
             updateHash();
         });
     }
@@ -187,6 +187,18 @@ DemodulatorPanel.prototype.updateButtons = function() {
     }
 }
 
+DemodulatorPanel.prototype.setCenterFrequency = function(center_freq) {
+    if (this.center_freq === center_freq) {
+        return ;
+    }
+    this.center_freq = center_freq;
+    var demod = this.getDemodulator();
+    if (demod) {
+        this.tuneableFrequencyDisplay.setFrequency(center_freq + demod.get_offset_frequency());
+    }
+    updateHash();
+};
+
 $.fn.demodulatorPanel = function(){
     if (!this.data('panel')) {
         this.data('panel', new DemodulatorPanel(this));
diff --git a/htdocs/openwebrx.js b/htdocs/openwebrx.js
index 19d59c8..971cf65 100644
--- a/htdocs/openwebrx.js
+++ b/htdocs/openwebrx.js
@@ -745,6 +745,7 @@ function on_ws_recv(evt) {
 
                         bandwidth = config['samp_rate'];
                         center_freq = config['center_freq'];
+                        $('#openwebrx-panel-receiver').demodulatorPanel().setCenterFrequency(center_freq);
                         fft_size = config['fft_size'];
                         var audio_compression = config['audio_compression'];
                         audioEngine.setCompression(audio_compression);