mirror of https://github.com/kivy/kivy.git
69 lines
3.1 KiB
Python
69 lines
3.1 KiB
Python
from kivy.adapters.listadapter import ListAdapter
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from kivy.uix.listview import ListItemButton, ListItemLabel, \
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CompositeListItem, ListView
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from kivy.uix.gridlayout import GridLayout
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from datastore_integers import datastore_integers
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class MainView(GridLayout):
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def __init__(self, **kwargs):
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kwargs['cols'] = 2
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kwargs['size_hint'] = (1.0, 1.0)
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super(MainView, self).__init__(**kwargs)
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# This is quite an involved args_converter, so we should go
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# through the details. x here is a data item object, be it
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# a string for a typical usage, as here, or some other object.
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# x will become the text value when the class used in this
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# example, CompositeListItem, is instantiated with the args
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# returned by this converter. All of the rest, for size_hint_y,
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# height, and the cls_dicts list, will be passed in the call
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# to instantiate CompositeListItem for a data item. Inside the
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# constructor of CompositeListItem is special-handling code that
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# uses cls_dicts to create, in turn, the component items in the
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# composite. This is a similar approach to using a kv template,
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# which you might wish to explore also.
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args_converter = \
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lambda x: \
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{'text': x,
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'size_hint_y': None,
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'height': 25,
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'cls_dicts': [{'cls': ListItemButton,
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'kwargs': {'text': "Left",
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'merge_text': True,
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'delimiter': '-'}},
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{'cls': ListItemLabel,
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'kwargs': {'text': "Middle",
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'merge_text': True,
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'delimiter': '-',
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'is_representing_cls': True}},
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{'cls': ListItemButton,
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'kwargs': {'text': "Right",
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'merge_text': True,
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'delimiter': '-'}}]}
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item_strings = ["{0}".format(index) for index in xrange(100)]
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# And now the list adapter, constructed with the item_strings as
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# the data, a datastore to add the required is_selected boolean onto
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# data records, and our args_converter() that will operate one each
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# item in the data to produce list item view instances from the
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# :class:`CompositeListItem` class.
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list_adapter = ListAdapter(data=item_strings,
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datastore=datastore_integers,
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args_converter=args_converter,
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selection_mode='single',
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allow_empty_selection=False,
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cls=CompositeListItem)
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# Use the adapter in our ListView:
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list_view = ListView(adapter=list_adapter)
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self.add_widget(list_view)
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if __name__ == '__main__':
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from kivy.base import runTouchApp
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runTouchApp(MainView(width=800))
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