list_clyde.py

from kivy.adapters.listadapter import ListAdapter
from kivy.adapters.models import SelectableDataItem
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.button import Button
from kivy.uix.gridlayout import GridLayout
from kivy.uix.listview import ListView, ListItemButton

from fixtures import fruit_categories, fruit_data_list_of_dicts

from fruit_detail_view import FruitDetailView


class FruitsListAdapter(ListAdapter):

    def db_query_one(self, list_adapter, *args):
        self.data = fruit_data_items[10:15]

    def db_query_two(self, list_adapter, *args):
        self.data = fruit_data_items[4:9]

    def db_query_three(self, list_adapter, *args):
        self.data = fruit_data_items[13:-1]


class FruitItem(SelectableDataItem):
    def __init__(self, **kwargs):
        super(FruitItem, self).__init__(**kwargs)
        self.name = kwargs.get('name', '')
        self.serving_size = kwargs.get('Serving Size', '')
        self.data = kwargs.get('data', [])
        self.is_selected = kwargs.get('is_selected', False)


fruit_data_items = \
    [FruitItem(**fruit_dict) for fruit_dict in fruit_data_list_of_dicts]


class QueryResultsView(GridLayout):

    def __init__(self, **kwargs):
        kwargs['cols'] = 3
        super(QueryResultsView, self).__init__(**kwargs)

        queries = BoxLayout(
                orientation='vertical', size_hint=(None, 1), width=150)

        query_button_one = Button(text='DB Query One')
        query_button_two = Button(text='DB Query Two')
        query_button_three = Button(text='DB Query Three')

        queries.add_widget(query_button_one)
        queries.add_widget(query_button_two)
        queries.add_widget(query_button_three)

        self.add_widget(queries)

        list_item_args_converter = \
                lambda row_index, selectable: {'text': selectable.name,
                                               'size_hint_y': None,
                                               'height': 25}

        fruits_list_adapter = \
                FruitsListAdapter(data=fruit_data_items,
                                  args_converter=list_item_args_converter,
                                  selection_mode='single',
                                  allow_empty_selection=False,
                                  cls=ListItemButton)

        query_button_one.bind(on_release=fruits_list_adapter.db_query_one)
        query_button_two.bind(on_release=fruits_list_adapter.db_query_two)
        query_button_three.bind(on_release=fruits_list_adapter.db_query_three)

        fruits_list_view = \
                ListView(adapter=fruits_list_adapter, size_hint=(.2, 1.0))

        self.add_widget(fruits_list_view)

        # Detail view, for a given fruit, on the right:
        #
        detail_view = FruitDetailView(
                fruit_name=fruits_list_adapter.selection[0].text,
                size_hint=(.6, 1.0))

        fruits_list_adapter.bind(
                selection=detail_view.fruit_changed)

        self.add_widget(detail_view)


if __name__ == '__main__':

    from kivy.base import runTouchApp

    runTouchApp(QueryResultsView(width=800))