adding refresh component

Signed-off-by: Valerie Gleason 👌 <[email protected]>

Author: hellovolcano

examples/sample/sample_panel.py

@@ -5,6 +5,7 @@
 import nipanel
 
 panel = nipanel.StreamlitPanelValueAccessor(panel_id="sample_panel")
+panel.refresh()
 
 st.title("Sample Panel")
 

src/nipanel/_streamlit_constants.py

@@ -1 +1,2 @@
 STREAMLIT_PYTHON_PANEL_SERVICE = "ni.pythonpanel.v1.PythonPanelService"
+STREAMLIT_REFRESH_COMPONENT_URL = "http://localhost:42001/panels/refresh"

src/nipanel/_streamlit_panel_value_accessor.py

@@ -1,13 +1,17 @@
 from __future__ import annotations
 
-from typing import final
+from typing import final, Any
 
 import grpc
+import streamlit.components.v1 as components
 from ni_measurement_plugin_sdk_service.discovery import DiscoveryClient
 from ni_measurement_plugin_sdk_service.grpc.channelpool import GrpcChannelPool
 
 from nipanel._panel_value_accessor import PanelValueAccessor
-from nipanel._streamlit_constants import STREAMLIT_PYTHON_PANEL_SERVICE
+from nipanel._streamlit_constants import (
+    STREAMLIT_PYTHON_PANEL_SERVICE,
+    STREAMLIT_REFRESH_COMPONENT_URL,
+)
 
 
 @final
@@ -43,3 +47,11 @@ def __init__(
             grpc_channel_pool=grpc_channel_pool,
             grpc_channel=grpc_channel,
         )
+
+    def refresh(self) -> Any:
+        """Get the Streamlit component for refreshing the panel."""
+        _panel_refresh_component = components.declare_component(
+            "panelRefreshComponent",
+            url=f"{STREAMLIT_REFRESH_COMPONENT_URL}/{self.panel_id}",
+        )
+        return _panel_refresh_component()