输入内容时，新窗口打开并显示树视图

Question

a.py

import kivy

kivy.require('1.9.0')  # replace with your current kivy version !
import sqlite3 as lite
from kivy.uix.screenmanager import Screen
from kivy.app import App
from kivy.lang import Builder
from kivy.core.window import Window


Window.size = (500, 330)


con = lite.connect('demo.db')
con.text_factory = str
cur = con.cursor()

class GroupScreen(Screen):
    pass

class Group(App):
    #cur.execute("SELECT * FROM `groups` order by group_id asc")
    #rows = cur.fetchall()

    rows = [(1, 'Branch/Dividions', ''), (2, 'Capital Account', 'Reserve & Surplus')]

    def build(self):
        self.root = Builder.load_file('a.kv')
        return self.root



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

a.kv

GroupScreen:

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

        Label:
            text: 'Group'

        SingleLineTextInput:
            id: groupName

        Label:
            text: 'Leadger No.'

        SingleLineTextInput:
            id: groupCode

        GreenButton:
            text: 'Ok'

        GreenButton:
            text: 'Cancel'

        Label:

        Label:



<SingleLineTextInput@TextInput>:
    multiline: False


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

[![在此处输入图片描述][1]][1]

我有一个.py 和一个.kv 文件。
1. 当我在 Test textBox 中输入任何关键字时，新窗口应该以树视图结构打开。
2. 当从树视图中选择任何值时，它将被放置在文本框中，应该禁用手动输入。

有人可以帮我吗？

Answer 1

以下示例使用 on_text 事件来调用包含 treeview 和取消按钮的 popup 小部件。 on_text 事件将在文本更改时被调度。

示例

main.py

​​>

import sqlite3 as lite

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, 330)

# con = lite.connect('demo.db')
# con.text_factory = str
# cur = con.cursor()


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)


tree = [{'node_id': 'Capital Account',
         'children': [{'node_id': 'Reserves & Surplus',
                       'children': [{'node_id': '1.1.1',
                                     'children': [{'node_id': '1.1.1.1',
                                                   'children': []}]},
                                    {'node_id': '1.1.2',
                                     'children': []},
                                    {'node_id': '1.1.3',
                                     'children': []}]},
                       {'node_id': '1.2',
                        'children': []}]},
        {'node_id': 'Current Assests',
         'children': []}]


class TreeViewLabel(Label, TreeViewNode):
    pass


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

    def __init__(self, **kwargs):
        super(TreeviewGroup, self).__init__(**kwargs)
        self.tv = TreeView(root_options=dict(text="Branch/Divisions"),
                           hide_root=False,
                           indent_level=4)
        for branch in tree:
            populate_tree_view(self.tv, None, branch)
        self.remove_widgets()
        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):
    groupName = ObjectProperty(None)
    popup = ObjectProperty(None)

    def display_groups(self, instance):
        if len(instance.text) > 0:
            self.popup = TreeviewGroup()
            self.popup.open()


class Group(App):
    #cur.execute("SELECT * FROM `groups` order by group_id asc")
    #rows = cur.fetchall()

    rows = [(1, 'Branch/Dividions', ''), (2, 'Capital Account', 'Reserve & Surplus')]

    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.groupName.text = self.text
        app.root.popup.dismiss()

<TreeviewGroup>:
    id: treeview
    treeview: treeview
    title: "Groups"
    size_hint: None, None
    size: 400, 400
    auto_dismiss: False

    BoxLayout
        orientation: "vertical"
        BoxLayout:
            id: treeview
        Button:
            size_hint: 1, 0.1
            text: "Close"
            on_release: root.dismiss()


<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:
    groupName: groupName

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

        CustomLabel:
            text: 'Group'

        SingleLineTextInput:
            id: groupName
            on_text: root.display_groups(self)

        CustomLabel:
            text: 'Leadger No.'

        SingleLineTextInput:
            id: groupCode

        GreenButton:
            text: 'Ok'

        GreenButton:
            text: 'Cancel'

        Label:

        Label:

输出