Work on native gui design and install documentation

yms/database.py

@@ -8,6 +8,7 @@ class Database():
         self.conn = None
         self.cur = None
         self.dcur = None
+        self.error = None
 
     def connect(self, dbuser, dbpass):
         if self.conn:
@@ -17,7 +18,7 @@ class Database():
             self.conn = MySQLdb.connect(host=self.hostname, db=self.schema,
                 user=dbuser, passwd=dbpass, charset='utf8')
         except MySQLdb.Error as e:
-            print(e)
+            self.error = e
             return False
         self.cur = self.conn.cursor()
         self.dcur = self.conn.cursor(MySQLdb.cursors.DictCursor)
@@ -32,7 +33,7 @@ class Database():
             self.conn = MySQLdb.connect(host='localhost', db=self.schema,
                 unix_socket='/run/mysqld/mysqld.sock', charset='utf8')
         except MySQLdb.Error as e:
-            print(e)
+            self.error = e
             return False
         self.cur = self.conn.cursor()
         self.dcur = self.conn.cursor(MySQLdb.cursors.DictCursor)
@@ -45,3 +46,11 @@ class Database():
 
     def is_connected(self):
         return self.conn.open
+
+    def last_error(self):
+        if not self.error:
+            return(0, '')
+        code = self.error.args[0]
+        text = self.error.args[1]
+        self.error = None
+        return(code, text)

yms/gtkutils.py

@@ -17,7 +17,8 @@ def init_named_controls(window, builder):
         'tbl': 'table',
         'mnu': 'menu',
         'img': 'image',
-        'drw': 'area'
+        'drw': 'area',
+        'stk': 'stack'
     }
     for ctrl in ctrltype.values():
         setattr(window, ctrl, {})