bitcraze#349 Changed the anchor status update function to avoid delet…

…ing and recreating Qt labels.

The constant recreation of labels forced the plots to be slightly resized, which in turn slowly zoomed the plots. Now the plots are stable after status updates.

src/cfclient/ui/tabs/locopositioning_tab.py

@@ -828,33 +828,39 @@ def _loco_sys_received(self, timestamp, data, logconf):
     def _update_ranging_status_indicators(self):
         container = self._anchor_stats_container
 
-        while not container.isEmpty():
-            label = container.takeAt(0).widget()
-            label.deleteLater()
-
         ids = sorted(self._anchors.keys())
 
-        col = 1
-        row = 1
-
+        # Update existing labels or add new if needed
+        count = 0
         for id in ids:
-            label = QLabel()
+            col = count % 8
+            row = int(count / 8)
+
+            if count < container.count():
+                label = container.itemAtPosition(row, col).widget()
+            else:
+                label = QLabel()
+                label.setMinimumSize(30, 0)
+                label.setProperty('frameShape', 'QFrame::Box')
+                label.setAlignment(Qt.AlignCenter)
+                container.addWidget(label, row, col)
+
             label.setText(str(id))
-            label.setMinimumSize(30, 0)
-            label.setProperty('frameShape', 'QFrame::Box')
-            label.setAlignment(Qt.AlignCenter)
 
             if self._anchors[id].is_active():
                 label.setStyleSheet(STYLE_GREEN_BACKGROUND)
             else:
                 label.setStyleSheet(STYLE_RED_BACKGROUND)
 
-            container.addWidget(label, row, col)
+            count += 1
 
-            col += 1
-            if col > 8:
-                col = 1
-                row += 1
+        # Remove labels if there are too many
+        for i in range(count, container.count()):
+            col = i % 8
+            row = int(i / 8)
+
+            label = container.itemAtPosition(row, col).widget()
+            label.deleteLater()
 
     def _logging_error(self, log_conf, msg):
         """Callback from the log layer when an error occurs"""