Added Controls testing + documentation

src/myfasthtml/controls/VisNetwork.py

@@ -25,19 +25,33 @@ class VisNetworkState(DbObject):
           },
           "physics": {"enabled": True}
       }
+      self.events_handlers: dict = {}  # {event_name: command_url}
 
 
 class VisNetwork(MultipleInstance):
-  def __init__(self, parent, _id=None, nodes=None, edges=None, options=None):
+  def __init__(self, parent, _id=None, nodes=None, edges=None, options=None, events_handlers=None):
     super().__init__(parent, _id=_id)
     logger.debug(f"VisNetwork created with id: {self._id}")
     
+    # possible events (expected in snake_case
+    # - select_node → selectNode
+    # - select → select
+    # - click → click
+    # - double_click → doubleClick
+    
     self._state = VisNetworkState(self)
-    self._update_state(nodes, edges, options)
+    
+    # Convert Commands to URLs
+    handlers_htmx_options = {
+        event_name: command.ajax_htmx_options()
+        for event_name, command in events_handlers.items()
+    } if events_handlers else {}
+    
+    self._update_state(nodes, edges, options, handlers_htmx_options)
   
-  def _update_state(self, nodes, edges, options):
-    logger.debug(f"Updating VisNetwork state with {nodes=}, {edges=}, {options=}")
-    if not nodes and not edges and not options:
+  def _update_state(self, nodes, edges, options, events_handlers=None):
+    logger.debug(f"Updating VisNetwork state with {nodes=}, {edges=}, {options=}, {events_handlers=}")
+    if not nodes and not edges and not options and not events_handlers:
       return
     
     state = self._state.copy()
@@ -47,6 +61,8 @@ class VisNetwork(MultipleInstance):
       state.edges = edges
     if options is not None:
       state.options = options
+    if events_handlers is not None:
+      state.events_handlers = events_handlers
     
     self._state.update(state)
   
@@ -70,6 +86,34 @@ class VisNetwork(MultipleInstance):
     # Convert Python options to JS
     js_options = json.dumps(self._state.options, indent=2)
     
+    # Map Python event names to vis-network event names
+    event_name_map = {
+        "select_node": "selectNode",
+        "select": "select",
+        "click": "click",
+        "double_click": "doubleClick"
+    }
+    
+    # Generate event handlers JavaScript
+    event_handlers_js = ""
+    for event_name, command_htmx_options in self._state.events_handlers.items():
+      vis_event_name = event_name_map.get(event_name, event_name)
+      event_handlers_js += f"""
+              network.on('{vis_event_name}', function(params) {{
+                const event_data = {{
+                  event_name: '{event_name}',
+                  nodes: params.nodes,
+                  edges: params.edges,
+                  pointer: params.pointer
+                }};
+                htmx.ajax('POST', '{command_htmx_options['url']}', {{
+                  values: {{event_data: JSON.stringify(event_data)}},
+                  target: '{command_htmx_options['target']}',
+                  swap: '{command_htmx_options['swap']}'
+                }});
+              }});
+"""
+    
     return (
         Div(
           id=self._id,
@@ -92,6 +136,7 @@ class VisNetwork(MultipleInstance):
               }};
               const options = {js_options};
               const network = new vis.Network(container, data, options);
+              {event_handlers_js}
             }})();
         """)
     )