Update app.py

app.py

@@ -315,8 +315,16 @@ def server(input, output, session):
             "delay_type": "throttle",
             "clip": True,  # This helps constrain the brush to the plot area
             "fill": "#00000033",  # Optional: sets a semi-transparent fill
-            "stroke": "#000000",   # Optional: sets the brush border color
-
+            "stroke": "#000000",    # Resets brush when new data is loaded
+        # Add bounds for the brush
+        "brushOpts": {
+            "bounds": {
+                "x": [-25, 25],  # Match your plot x-limits
+                "y": [-25, 25]   # Match your plot y-limits
+            },
+            "constrainToWindow": True,  # Constrain to window bounds
+            "clampToData": True         # Ensure brush stays within data range
+        }
         }