Kit manager menu oncesi

app_state.py

@@ -23,6 +23,12 @@ MAX_ALLOWED_BOX_WIDTH = 400
 window = None
 canvas = None
 tree = None
+status_label = None      # the window's bottom status bar
+
+# Status bar tones. A hint that something needs attention later is worth a colour, so a
+# placement that leaves the schema out of step is not read as a plain confirmation.
+STATUS_INFO_COLOUR = "#333333"
+STATUS_WARN_COLOUR = "#a04b00"
 
 # Maps to hold tracking states
 tree_element_map = {}       # Treeview item ID -> ET.Element
@@ -47,7 +53,12 @@ drag_data = {"x": 0, "y": 0, "tag": None}
 
 # Global component slot registries compiled dynamically per file load
 final_components_registry = {}
-active_schema_kits = {}
+active_schema_kits = {}      # kit name -> checksum, as the open file's <schema> declares them
+
+# Kits a placed component needs that the file's <schema> does not declare yet, as
+# kit name -> checksum resolved from Sedona home. Filled in when a palette component is
+# placed and read back when saving, which is where the <schema> block is reconciled.
+pending_schema_kits = {}
 
 
 def load_preferences():
@@ -102,6 +113,21 @@ def base_window_title():
     return f"Sedona SAX Tree View Viewer & Program Editor [v{VERSION}]"
 
 
+def set_status(message, warn=False):
+    """Posts a one-line note to the status bar. A no-op before the UI exists."""
+    if status_label is None:
+        return
+    status_label.config(
+        text=message,
+        foreground=STATUS_WARN_COLOUR if warn else STATUS_INFO_COLOUR
+    )
+
+
+def clear_status():
+    """Empties the status bar, for when the note no longer describes anything on screen."""
+    set_status("")
+
+
 def mark_dirty():
     """Single funnel for 'the document changed', including the unsaved-state tint."""
     global is_dirty