Clear flag widget when there is no string after 'flags' in the text p…

…rompt

Ensures the flag widget is cleared of all items if there is no string after 'flags' in the text prompt. This prevents any outdated or irrelevant items from being displayed, maintaining an accurate and clean state for the widget.

annolid/gui/app.py

@@ -619,10 +619,15 @@ def _grounding_sam(self):
             return
 
         # Check if the prompt starts with 'flags:' and contains flags separated by commas
-        if prompt_text.startswith('flags:') and ',' in prompt_text:
+        if prompt_text.startswith('flags:'):
             flags = {k.strip(): False for k in prompt_text.replace(
-                'flags:', '').split(',')}
-            self.loadFlags(flags)
+                'flags:', '').split(',') if len(k.strip()) > 0}
+            if len(flags.keys()) > 0:
+                self.loadFlags(flags)
+            else:
+                # # If there is no string after 'flags'
+                # in the text prompt, clear the flag widget
+                self.flag_widget.clear()
         else:
             self.canvas.predictAiRectangle(prompt_text)
 
@@ -1186,6 +1191,13 @@ def predict_is_ready(self, messege):
                 self, "Prediction Ready",
                 "Predictions for the video frames have been generated!")
 
+    def loadFlags(self, flags):
+        for key, flag in flags.items():
+            item = QtWidgets.QListWidgetItem(key)
+            item.setFlags(item.flags() | Qt.ItemIsUserCheckable)
+            item.setCheckState(Qt.Checked if flag else Qt.Unchecked)
+            self.flag_widget.addItem(item)
+
     def saveLabels(self, filename):
         lf = LabelFile()
         has_zone_shapes = False