make qspectrumanalyzer usable again, as the souroundings changed

README.rst

@@ -182,3 +182,19 @@ Todo:
 - display average noise level
 - frequency markers / bookmarks with notes (even importing and exporting .csv file with
   predefined channels, etc.)
+
+
+Debugg:
+-----
+python3    
+
+import qspectrumanalyzer.__main__    
+
+qspectrumanalyzer.__main__.main()    
+
+
+Changelog:
+-----
+- rtl_power compatibility
+- status bar back working
+- fix waterfall 

qspectrumanalyzer/__main__.py

@@ -275,9 +275,9 @@ def update_progress(self, value):
         elif value > value_max:
             value = value_max
         else:
-            self.progressbar.setRange(0, value_max)
+            self.progressbar.setRange(0, int(value_max))
 
-        self.progressbar.setValue(value)
+        self.progressbar.setValue(int(value))
 
     def on_power_thread_started(self):
         """Update buttons state when power thread is started"""
@@ -300,7 +300,7 @@ def start(self, single_shot=False):
         self.start_timestamp = self.prev_data_timestamp
 
         if self.intervalSpinBox.value() >= 1:
-            self.progressbar.setRange(0, self.intervalSpinBox.value() * 1000)
+            self.progressbar.setRange(0, int(self.intervalSpinBox.value()) * 1000)
         else:
             self.progressbar.setRange(0, 0)
         self.update_progress(0)

qspectrumanalyzer/backends/rtl_power.py

@@ -50,9 +50,11 @@ def process_start(self):
                 "-p", "{}".format(self.params["ppm"]),
                 "-c", "{}".format(self.params["crop"])
             ])
-
-            if self.params["sample_rate"] > 0:
-                cmdline.extend(["-r", "{}M".format(self.params["sample_rate"] / 1e6)])
+
+            #not supported any more
+            #if self.params["sample_rate"] > 0:
+            #    cmdline.extend(["-r", "{}M".format(self.params["sample_rate"] / 1e6)])
+
             if self.params["gain"] >= 0:
                 cmdline.extend(["-g", "{}".format(self.params["gain"])])
             if self.params["single_shot"]:

qspectrumanalyzer/plot.py

@@ -1,6 +1,8 @@
 import collections, math
 
 from Qt import QtCore
+from Qt import QtGui
+
 import pyqtgraph as pg
 
 # Basic PyQtGraph settings
@@ -310,8 +312,14 @@ def update_plot(self, data_storage):
 
         # Create waterfall image on first run
         if self.counter == 1:
-            self.waterfallImg = pg.ImageItem()
-            self.waterfallImg.scale((data_storage.x[-1] - data_storage.x[0]) / len(data_storage.x), 1)
+            self.waterfallImg = pg.ImageItem( levels=((data_storage.x[-1] - data_storage.x[0]) / len(data_storage.x), 1))
+            #self.waterfallImg.scale((data_storage.x[-1] - data_storage.x[0]) / len(data_storage.x), 1)
+            #self.waterfallImg.scale(float((data_storage.x[-1] - data_storage.x[0]) / len(data_storage.x)), float(1))
+            #self.waterfallImg.scale(5126)
+            tr = QtGui.QTransform()  # prepare ImageItem transformation:
+            tr.scale((data_storage.x[-1] - data_storage.x[0]) / len(data_storage.x), 1)       # scale horizontal and vertical axes
+            self.waterfallImg.setTransform(tr)
+
             self.plot.clear()
             self.plot.addItem(self.waterfallImg)