Add addon database

addons/godot_db_manager/core/GDDBConstants.gd

@@ -0,0 +1,38 @@
+"""
+class GDDBConstants
+"""
+
+class_name GDDBConstants
+
+tool
+extends Node
+
+# GDDB signature
+const c_gddb_signature = "GDDB_ver"
+
+# GDDB ver
+const c_gddb_ver = "2.0"
+
+# invalid id to initialize integer properties
+const c_invalid_id = -1
+
+# maximum database name length
+const c_max_db_name_len = 16
+
+# maximum table name length
+const c_max_table_name_len = 16
+
+# characters that should not be part of the database name
+const c_invalid_characters = "`~!@#$%^&*()=+[]{}\\|;:'\",<.>/?"
+
+# addon main path
+const c_addon_main_path = "res://addons/godot_db_manager/"
+
+# maximum tables list width
+const c_max_tables_list_width = 400.0
+
+# minimum cell width
+const c_min_cell_width = 150.0
+
+# maximum cell width
+const c_max_cell_width = 400.0