More icon search paths

qtgui/mainwindow.py

@@ -118,6 +118,13 @@ class MainWindow(QtWidgets.QMainWindow):
         self.qtApp.setApplicationDisplayName(f"{METADATA['name']}")
         logger.info("Init MainWindow")
 
+        QtGui.QIcon.setFallbackThemeName("hicolor")  #only one, not a list
+        iconPaths = QtGui.QIcon.themeSearchPaths()
+        iconPaths += ["/usr/share/icons/hicolor", "/usr/share/pixmaps"]
+        QtGui.QIcon.setThemeSearchPaths(iconPaths)
+                
+        logger.info(f"Program icons path: {QtGui.QIcon.themeSearchPaths()}, {QtGui.QIcon.fallbackSearchPaths()}, {QtGui.QIcon.fallbackThemeName()}")
+
         #Set up the user interface from Designer and other widgets
         self.ui =  Ui_MainWindow()
         self.ui.setupUi(self)
@@ -129,7 +136,7 @@ class MainWindow(QtWidgets.QMainWindow):
 
         #TODO: Hide information tab until the feature is ready
         self.ui.tabbyCat.removeTab(2)
-        self.programIcons = {} #executableName:QIcon. Filled by self.updateProgramDatabase
+        self.programIcons = {} #executableName:QIcon. Filled by self._updateGUIWithCachedPrograms which calls _updateIcons
         self.sessionController = SessionController(mainWindow=self)
         self.systemTray = SystemTray(mainWindow=self)
         self.connectMenu()
@@ -224,6 +231,7 @@ class MainWindow(QtWidgets.QMainWindow):
     def _updateIcons(self):
         logger.info("Creating icon database")
         programs = api.getSystemPrograms()
+        
         self.programIcons.clear()
         for entry in programs:
             exe = entry["argodejoExec"]