lists with datasource- proper separation of duties

src/justgetit/app.py

@@ -35,14 +35,17 @@ class JustEatIt(toga.App):
 
     def startup(self):
         self.configuration = Configuration(self)
-        self.data = LocalData(self)
+
+        self.localdata = LocalData(self)
 
         self.login_screen = Login()
         self.register_screen = Register()
         self.providekey_screen = ProvideKey()
-        self.lists_screen = Lists()
+        self.lists_screen = Lists(self.localdata.lists)
         self.backend = BackEnd(self)
 
+        self.localdata.lists.data_widget = self.lists_screen.data_widget.source
+
         self.main_window = toga.MainWindow(title=self.formal_name)
 
         # here comes the startup logic.

src/justgetit/lists.py

@@ -10,10 +10,12 @@ class DatabaseList(toga.Box):
     def __init__(self, id=None, style=None, children=None, **kwargs):
         style.direction = COLUMN
         super().__init__(id, style, children, **kwargs)
-        self.data = ListSource(
+
+        self.source = ListSource(
             accessors=["id", "owner_user_id", "name", "is_active"]
         )
-        self.data.add_listener(DatabaseList.DataListener(self))
+        self.source.add_listener(DatabaseList.DataListener(self))
+
 
     class DataListener(Listener):
         # listen to the database
@@ -88,7 +90,7 @@ class DatabaseList(toga.Box):
 
 class Lists(BasePage): 
 
-    def __init__(self, *args, **kwargs):
+    def __init__(self, datasource, *args, **kwargs):
         """
         This page allows you to enter the aplication key
         The aplication-key is kept until a month after the app is last used
@@ -104,21 +106,20 @@ class Lists(BasePage):
         self.first_menu_button_callback = self.edit_button_pressed
         self.second_menu_button_icon = 'logout'
         self.second_menu_button_callback = self.logout_button_pressed
+        self.datasource = datasource
 
         super().__init__(*args, **kwargs)
 
         # here the list of lists
-        self.listholder = DatabaseList(
+        self.data_widget = DatabaseList(
             style=Pack(
                 margin_bottom=10,
                 # background_color="white",
+            ),
         )
-        )
-        
-
 
         scrollarea = toga.ScrollContainer(
-            content=self.listholder,
+            content=self.data_widget,
             style=Pack(
                 flex=1,
                 margin=10,
@@ -126,16 +127,6 @@ class Lists(BasePage):
             horizontal=False
         )
 
-
-
-        # for i in range(30):
-        #     listholder.add(self.create_row("Supermarkt",f"{i}","30"))
-
-
-
-
-
-
         # at the bottom of the list: edit-button
         save_button = toga.Button(
             icon=toga.Icon("images/edit"),
@@ -160,56 +151,11 @@ class Lists(BasePage):
 
     def on_show(self):
         super().on_show()
-        self.listholder.data.clear()
-        for l in self.app.data.reload_list():
-            print(type(l))
-            self.listholder.data.append(l)
+        self.datasource.reload()
+
+
+
 
-        # self.listholder.data.data = self.app.data.reload_list()
 
     def edit_button_pressed(self):
         self.app.goto_next_page_by_name(PAGE_EDITLISTS)
-
-    def create_row(self, text, open, total):
-        label = toga.Button(
-            text=text,
-            margin_bottom=2,
-            style = Pack(
-                # margin_bottom=2,  # scrollig doesnt work, bug?, replaced by margin_bottom in Button
-                width=250,
-                background_color="white",
-                font_size=15
-            )
-        )
-        spacer = toga.Box(
-            style = Pack(
-                flex=1
-            )
-        )
-        indicator = toga.Label(
-            text = f"{open} / {total}",
-            style = Pack(
-                color="blue",
-                margin=8
-            )
-        )
-        listrow_inner = toga.Box(
-            style = Pack(
-                margin_bottom=1,
-                flex=1,
-                background_color="white",
-            )
-        )
-        listrow_inner.add(label)
-        listrow_inner.add(spacer)
-        listrow_inner.add(indicator)
-
-        listrow_outer = toga.Box(
-            style = Pack(
-                flex=1,
-                background_color="#ccc",
-            )
-        )
-        listrow_outer.add(listrow_inner)
-
-        return(listrow_outer)

src/justgetit/localdata.py

@@ -1,29 +1,23 @@
 import datetime
 import asyncio
+import toga
+from toga.sources import ListSource
 
-class ListOfLists():
+class ListsData():
     def __init__(self, app):
         self.app = app
-        # self.listento = widget_to_listen_to
-        self.data = []
-        # self.widget_data = list_source_object
-        # self.reload()
+        self.data_widget = None
 
-        # self.widget_data.append({"name": "ToDo", "id": 3, "owner_user_id": 3, "is_active": True, "updated_at": datetime.datetime.now() })
-
-    def reload(self, userid):
+    def reload(self):
+        curent_userid = self.app.configuration.get_userid()
+        if curent_userid > 0:
             parameters = {}
-        parameters['userid'] = userid
+            parameters['userid'] = curent_userid
             result = self.app.backend.postwait('load_lists', parameters)
-        return result['data']
+            for item in result['data']:
+                self.data_widget.append(item)
 
 
-    def on_reloaded(self, bla):
-        print("reloaded")
-
-    def clear(self):
-        self.data = []
-
 
 
 class List():
@@ -52,7 +46,7 @@ class LocalData():
         self.app = app
         self.curent_userid = 0
         self.current_listid = 0
-        self.lists = ListOfLists(app)
+        self.lists = ListsData(app)
 
     def set_user(self, userid):
          if userid != self.curent_userid: