Inherit signal timestamp to signals created from father signal

src/urh/controller/widgets/SignalFrame.py

@@ -1263,7 +1263,7 @@ def on_bandpass_filter_triggered(self, f_low: float, f_high: float):
             time.sleep(0.1)
 
         filtered = np.frombuffer(filtered.get_obj(), dtype=np.complex64)
-        signal = self.signal.create_new(new_data=filtered.astype(np.complex64))
+        signal = self.signal.create_new(new_data=filtered.astype(np.complex64), new_timestamp=self.signal.timestamp)
         signal.name = self.signal.name + " filtered with f_low={0:.4n} f_high={1:.4n} bw={2:.4n}".format(f_low, f_high,
                                                                                                          filter_bw)
         self.signal_created.emit(signal)

src/urh/signalprocessing/Signal.py

@@ -440,13 +440,15 @@ def calc_relative_noise_threshold_from_range(self, noise_start: int, noise_end:
             logger.warning("Could not calculate noise threshold for range {}-{}".format(noise_start, noise_end))
             return self.noise_threshold_relative
 
-    def create_new(self, start=0, end=0, new_data=None):
+    def create_new(self, start=0, end=0, new_data=None, new_timestamp=0):
         new_signal = Signal("", "New " + self.name)
 
         if new_data is None:
             new_signal.iq_array = IQArray(self.iq_array[start:end])
+            new_signal.__timestamp = self.timestamp + (start / self.sample_rate)
         else:
             new_signal.iq_array = IQArray(new_data)
+            new_signal.__timestamp = new_timestamp
 
         new_signal._noise_threshold = self.noise_threshold
         new_signal.noise_min_plot = self.noise_min_plot