make the frontend resume when an sdr device becomes present

htdocs/openwebrx.js

@@ -800,6 +800,12 @@ function on_ws_recv(evt) {
                             return '<option value="' + profile['id'] + '">' + profile['name'] + "</option>";
                         }).join(""));
                         $('#openwebrx-sdr-profiles-listbox').val(currentprofile.toString());
+                        // this is a bit hacky since it only makes sense if the error is actually "no sdr devices"
+                        // the only other error condition for which the overlay is used right now is "too many users"
+                        // so there shouldn't be a problem here
+                        if (json['value'].keys()) {
+                            $('#openwebrx-error-overlay').hide();
+                        }
                         break;
                     case "features":
                         Modes.setFeatures(json['value']);
@@ -836,6 +842,7 @@ function on_ws_recv(evt) {
                         var $overlay = $('#openwebrx-error-overlay');
                         $overlay.find('.errormessage').text(json['value']);
                         $overlay.show();
+                        $("#openwebrx-panel-receiver").demodulatorPanel().stopDemodulator();
                         break;
                     case 'secondary_demod':
                         secondary_demod_push_data(json['value']);

owrx/connection.py

@@ -325,6 +325,7 @@ class OpenWebRxReceiverClient(OpenWebRxClient, SdrSourceEventClient):
         self.sdr.addSpectrumClient(self)
 
     def handleNoSdrsAvailable(self):
+        self.stack.removeLayerByPriority(0)
         self.write_sdr_error("No SDR Devices available")
 
     def startDsp(self):

owrx/property/__init__.py

@@ -294,6 +294,11 @@ class PropertyStack(PropertyManager):
 
         return changes
 
+    def removeLayerByPriority(self, priority):
+        for layer in self.layers:
+            if layer["priority"] == priority:
+                self.removeLayer(layer["props"])
+
     def removeLayer(self, pm: PropertyManager):
         for layer in self.layers:
             if layer["props"] == pm:

test/property/test_property_stack.py

@@ -42,6 +42,18 @@ class PropertyStackTest(TestCase):
         om.removeLayer(high_pm)
         self.assertEqual(om["testkey"], "low value")
 
+    def testLayerRemovalByPriority(self):
+        om = PropertyStack()
+        low_pm = PropertyLayer()
+        high_pm = PropertyLayer()
+        low_pm["testkey"] = "low value"
+        high_pm["testkey"] = "high value"
+        om.addLayer(1, low_pm)
+        om.addLayer(0, high_pm)
+        self.assertEqual(om["testkey"], "high value")
+        om.removeLayerByPriority(0)
+        self.assertEqual(om["testkey"], "low value")
+
     def testPropertyChange(self):
         layer = PropertyLayer()
         stack = PropertyStack()