rv_form_example.py

'''
'''
import random
from uuid import uuid4
from string import ascii_lowercase

from kivy.app import App
from kivy.lang import Builder
from kivy.properties import ListProperty, StringProperty


KV = '''
#:import dumps json.dumps

<ImageButton@ButtonBehavior+Image>:

<EditableLabel@ButtonBehavior+Label>:
    edit: False
    tmp: ''
    next: None
    font_size: '20sp'
    uuid: None
    key: ''
    on_release: app.edit_people(root.uuid, root.key, True)

    canvas.before:
        Color:
            rgba: rgba('#222222')
        Rectangle:
            pos: self.pos
            size: self.size

    BoxLayout:
        pos: root.pos
        size: root.width, root.height if root.edit else 0
        opacity: 1 if root.edit else 0
        disabled: not root.edit
        TextInput:
            text: root.tmp
            multiline: False
            font_size: root.font_size
            focus: root.edit and app.current_focus == '{uuid}-{key}'.format(uuid=root.uuid, key=root.key)
            on_text: app.update_people(root.uuid, **{f'tmp_{root.key}': self.text})
            on_text_validate:
                app.update_people(root.uuid, **{root.key: self.text})
                app.edit_people(root.uuid, root.key, False)
                if root.next: app.edit_people(root.uuid, root.next, True)

        ImageButton:
            source: 'atlas://data/images/defaulttheme/close'
            pos_hint: {'center_y': .5}
            size_hint: None, None
            size: self.texture_size
            on_press:
                root.edit = False
                root.tmp = root.text

<EditableRow@BoxLayout>:
    uuid: None
    name: ''
    surname: ''
    year: ''
    edit_name: False
    edit_surname: False
    edit_year: False
    tmp_name: ''
    tmp_surname: ''
    tmp_year: ''
    spacing: '10dp'

    EditableLabel:
        id: name
        text: root.name
        tmp: root.tmp_name
        edit: root.edit_name
        uuid: root.uuid
        key: 'name'
        next: 'surname'
    EditableLabel:
        id: surname
        text: root.surname
        tmp: root.tmp_surname
        edit: root.edit_surname
        uuid: root.uuid
        key: 'surname'
        next: 'year'
    EditableLabel:
        id: year
        text: root.year
        tmp: root.tmp_year
        uuid: root.uuid
        edit: root.edit_year
        key: 'year'

FloatLayout:
    BoxLayout:
        ScrollView:
            size_hint_x: .5
            Label:
                text: dumps(app.people, indent=2)
                size_hint_y: None
                height: self.texture_size[1]

        BoxLayout:
            orientation: 'vertical'
            BoxLayout:
                size_hint_y: None
                height: '30dp'
                Label:
                    text: 'name'
                Label:
                    text: 'surname'
                Label:
                    text: 'year of birth'

            RecycleView:
                data: app.people
                viewclass: 'EditableRow'
                RecycleBoxLayout:
                    size_hint_y: None
                    height: self.minimum_height
                    orientation: 'vertical'
                    default_size_hint: 1, None
                    default_size: 0, '40dp'
                    spacing: '10dp'

            Button:
                text: 'add'
                size_hint_y: None
                height: '40dp'
                on_press:
                    app.add_people()
'''

people_model = {
    'uuid': '',
    'name': '',
    'surname': '',
    'year': '',
    'tmp_name': '',
    'tmp_surname': '',
    'tmp_year': '',
    'edit_name': False,
    'edit_surname': False,
    'edit_year': False,
}

class Application(App):
    people = ListProperty()
    current_focus = StringProperty('')

    def build(self):
        self.people = [{
            **people_model,
            'uuid': uuid4().int,
            'name': ''.join(random.sample(ascii_lowercase, 5)).capitalize(),
            'surname': ''.join(random.sample(ascii_lowercase, 8)).capitalize(),
            'year': str(random.randint(1900, 2020)),
        } for i in range(50)]
        return Builder.load_string(KV)

    def add_people(self):
        uuid = uuid4().int
        self.people.append({
            **people_model,
            'uuid': uuid,
        })
        self.edit_people(uuid, 'name', True)

    def edit_people(self, uuid, key, active):
        self.people = [
            {
                **item,
                f'tmp_{key}': item[key],
                f'edit_{key}': active,
            }
            if item['uuid'] == uuid
            else item
            for item in self.people
        ]
        if active:
            print(f"setting current_focus to {uuid, key}")
            self.current_focus = f'{uuid}-{key}'

    def update_people(self, uuid, **kwargs):
        # recreate the list with the updated item
        data = [
            {
                **item,
                **kwargs,
            }
            if item["uuid"] == uuid
            else item
            for item in self.people
        ]
        self.people = data

if __name__ == "__main__":
    Application().run()