Added watchdog support

constants.py

@@ -33,8 +33,20 @@ PROG_VERSION = "0.9.15-dev"
 PROG_AUTHOR = "Ignacio Serantes"
 
 # --- CACHE SETTINGS ---
-# Maximum number of thumbnails to keep in the in-memory cache.
-CACHE_MAX_SIZE = 20000
+# Maximum number of paths to track in the in-memory cache.
+CACHE_MAX_SIZE = 10000
+
+# Dynamic RAM limit for thumbnails to avoid swapping on low-end systems.
+try:
+    import psutil
+    _total_ram_bytes = psutil.virtual_memory().total
+    # Use 10% of system RAM, clamped between 128MB and 512MB
+    CACHE_MAX_RAM_BYTES = int(max(128 * 1024 * 1024,
+                                  min(512 * 1024 * 1024, _total_ram_bytes * 0.10)))
+except (ImportError, Exception):
+    # Fallback to a safe 256MB if psutil is missing or fails
+    CACHE_MAX_RAM_BYTES = 256 * 1024 * 1024
+
 # Maximum size of the persistent disk cache file.
 # 10 GB limit for persistent cache file
 DISK_CACHE_MAX_BYTES = 10 * 1024 * 1024 * 1024
@@ -814,6 +826,7 @@ _UI_TEXTS = {
         "ERROR_MOVE_FILE": "Could not move file: {}",
         "ERROR_COPY_FILE": "Could not copy file: {}",
         "MOVED_TO": "Moved to {}",
+        "FS_WATCHER_TOOLTIP": "File System Watcher (monitoring active directories)",
         "COPIED_TO": "Copied to {}",
         "ERROR_ROTATE_IMAGE": "Could not rotate image: {}",
     },
@@ -1285,6 +1298,8 @@ _UI_TEXTS = {
         "ERROR_MOVE_FILE": "No se pudo mover el archivo: {}",
         "ERROR_COPY_FILE": "No se pudo copiar el archivo: {}",
         "MOVED_TO": "Movido a {}",
+        "FS_WATCHER_TOOLTIP": "Monitor de Sistema de Archivos (monitoreando "
+        "directorios activos)",
         "COPIED_TO": "Copiado a {}",
         "ERROR_ROTATE_IMAGE": "No se pudo girar la imagen: {}",
     },
@@ -1757,6 +1772,8 @@ _UI_TEXTS = {
         "ERROR_MOVE_FILE": "Non se puido mover o ficheiro: {}",
         "ERROR_COPY_FILE": "Non se puido copiar o ficheiro: {}",
         "MOVED_TO": "Movido a {}",
+        "FS_WATCHER_TOOLTIP": "Monitor do Sistema de Ficheiros (monitoreando "
+        "directorios activos)",
         "COPIED_TO": "Copiado a {}",
         "ERROR_ROTATE_IMAGE": "Non se puido xirar a imaxe: {}",
     }