Python / Kivy：将TextInput文本从一个类传递到另一个类

Question

当我运行test.py时，会显示name TextInput。当我输入TextInput时，会显示Tree View filter TextInput。当我输入{{1}时TextInput它根据类型filter显示结果 但是我希望当有人输入keyword TextInput然后输入name时放入keyword TextInput，结果应该按照filter显示。

test.py

keyword

test.kv

from kivy.uix.screenmanager import Screen
from kivy.app import App
from kivy.lang import Builder
from kivy.core.window import Window
from kivy.uix.popup import Popup
from kivy.uix.treeview import TreeView, TreeViewLabel, TreeViewNode
from kivy.uix.label import Label
from kivy.properties import ObjectProperty
Window.size = (500, 400)


def populate_tree_view(tree_view, parent, node):
    if parent is None:
        tree_node = tree_view.add_node(TreeViewLabel(text=node['node_id'],
                                                     is_open=True))
    else:
        tree_node = tree_view.add_node(TreeViewLabel(text=node['node_id'],
                                                     is_open=True), parent)

    for child_node in node['children']:
        populate_tree_view(tree_view, tree_node, child_node)



class TreeViewLabel(Label, TreeViewNode):
    pass


class TreeviewGroup(Popup):
    treeview = ObjectProperty(None)
    tv = ObjectProperty(None)
    popup = ObjectProperty()

    def __init__(self,obj, **kwargs):
        super(TreeviewGroup, self).__init__(**kwargs)
        self.tv = TreeView(root_options=dict(text=""),
                       hide_root=False,
                       indent_level=4)

        rows = [('test{}').format(i) for i in range(1, 20)]

        tree = [{'node_id': r, 'children': []} for r in rows]

        self.tv.bind(minimum_height=self.treeview.setter('height'))
        for branch in tree:
            populate_tree_view(self.tv, None, branch)
        self.treeview.add_widget(self.tv)

    def filter(self, f):
        #self.ti.text = "text12"
        self.treeview.clear_widgets()
        self.tv = TreeView(root_options=dict(text=""),
                           hide_root=False,
                           indent_level=4)

        rows = [('test{}').format(i) for i in range(1, 20)]

        tree = []

        for r in rows:
            tree.append({'node_id': r, 'children': []})
        new_tree = []
        for n in tree:
            if f.lower() in n['node_id'].lower():
                new_tree.append(n)
        for branch in new_tree:
            populate_tree_view(self.tv, None, branch)

        self.treeview.add_widget(self.tv)

    def remove_widgets(self):
        for child in [child for child in self.treeview.children]:
            self.treeview.remove_widget(child)


class GroupScreen(Screen):
    name = ObjectProperty(None)
    popup = ObjectProperty(None)

    def display_groups(self, instance):
        if len(instance.text) > 0:
            if self.popup is None:
                self.popup = TreeviewGroup(self)
            self.popup.open()


class Group(App):
    def build(self):
        self.root = Builder.load_file('test.kv')
        return self.root


if __name__ == '__main__':
    Group().run()

Answer 1

通过整个单词，例如 keyword 或 0 ，将 on_text 替换为 on_text_validate 。

干 - 不要重复自己

有重复的代码，我已将它们转换为模块以便于维护。

def create_treeview_root(self):
...
def create_treeview_branch(self, obj):
...
def dismiss_callback(self):

片段

GroupScreen:
    ...
        SingleLineTextInput:
            id: name
            focus: True
            multiline: False
            on_text_validate: root.display_groups(self)

实施例

main.py

from kivy.uix.screenmanager import Screen
from kivy.app import App
from kivy.lang import Builder
from kivy.core.window import Window
from kivy.uix.popup import Popup
from kivy.uix.treeview import TreeView, TreeViewLabel, TreeViewNode
from kivy.uix.label import Label
from kivy.properties import ObjectProperty, StringProperty, ListProperty
Window.size = (500, 400)


def populate_tree_view(tree_view, parent, node):
    if parent is None:
        tree_node = tree_view.add_node(TreeViewLabel(text=node['node_id'],
                                                     is_open=True))
    else:
        tree_node = tree_view.add_node(TreeViewLabel(text=node['node_id'],
                                                     is_open=True), parent)

    for child_node in node['children']:
        populate_tree_view(tree_view, tree_node, child_node)


class TreeViewLabel(Label, TreeViewNode):
    pass


class TreeviewGroup(Popup):
    treeview = ObjectProperty(None)
    tv = ObjectProperty(None)
    filter_text = StringProperty('')
    tree = ListProperty([])

    def __init__(self, obj, **kwargs):
        super(TreeviewGroup, self).__init__(**kwargs)
        self.create_treeview_root()
        rows = [('test{}').format(i) for i in range(1, 20)]
        self.tree = [{'node_id': r, 'children': []} for r in rows]
        self.tv.bind(minimum_height=self.treeview.setter('height'))
        self.create_treeview_branch(self.tree)

    def create_treeview_root(self):
        self.tv = TreeView(root_options=dict(text=""),
                           hide_root=False,
                           indent_level=4)

    def create_treeview_branch(self, obj):
        for branch in obj:
            populate_tree_view(self.tv, None, branch)
        self.treeview.add_widget(self.tv)

    def on_open(self):
        self.filter_text = App.get_running_app().root.name.text

    def dismiss_callback(self):
        self.treeview.clear_widgets()
        self.dismiss()
        App.get_running_app().root.name.focus = True

    def filter(self, f):
        self.treeview.clear_widgets()
        self.create_treeview_root()
        new_tree = []
        for n in self.tree:
            if f.lower() in n['node_id'].lower():
                new_tree.append(n)
        self.create_treeview_branch(new_tree)


class GroupScreen(Screen):
    name = ObjectProperty(None)
    popup = ObjectProperty(None)

    def display_groups(self, instance):
        if len(instance.text) > 0:
            if self.popup is None:
                self.popup = TreeviewGroup(self)
            self.popup.open()


class Group(App):
    def build(self):
        self.root = Builder.load_file('test.kv')
        return self.root


if __name__ == '__main__':
    Group().run()

test.kv

#:kivy 1.10.0

<TreeViewLabel>:
    on_touch_down:
        app.root.name.text = self.text
        app.root.popup.dismiss_callback()

<TreeviewGroup>:
    treeview: treeview
    title: "Select"
    title_size: 17
    size: 800, 800
    auto_dismiss: False
    scroll: scroll
    fltr : fltr

    BoxLayout
        orientation: "vertical"
        TextInput:
            id : fltr
            focus: True
            text: root.filter_text
            size_hint_y: .13
            on_text: root.filter(self.text)

        ScrollView:
            id: scroll
            size_hint: 1, .9


            BoxLayout:
                size_hint_y: None
                id: treeview

        GridLayout:
            cols: 2
            row_default_height: '20dp'
            size_hint: .5, 0.1
            pos_hint: {'x': .25, 'y': 1}
            Button:
                text: 'Ok'
                on_release:
                    root.dismiss_callback()

            Button:
                text: 'Cancel'
                on_release:
                    root.dismiss_callback()

<CustomLabel@Label>:
    text_size: self.size
    valign: "middle"
    padding_x: 5

<SingleLineTextInput@TextInput>:
    multiline: False

<GreenButton@Button>:
    background_color: 1, 1, 1, 1
    size_hint_y: None
    height: self.parent.height * 0.150

GroupScreen:
    name: name

    GridLayout:
        cols: 2
        padding : 30,30
        spacing: 10, 10
        row_default_height: '40dp'

        CustomLabel:
            text: ' '

        CustomLabel:
            text: ' '

        CustomLabel:
            text: 'Name'

        SingleLineTextInput:
            id: name
            focus: True
            multiline: False
            on_text_validate: root.display_groups(self)

        GreenButton:
            text: 'Ok'

        GreenButton:
            text: 'Cancel'
            on_press: app.stop()

输出