Python 基维。向树视图动态添加节点

我正在尝试在循环中将\u节点添加到

TreeView

我有一个包含雇佣信息和分配id的sql db。我需要从db中添加具有名称的节点，并从

TreeViewButton

中分配变量id，从db中分配各自的id。我还需要将方法clk绑定到添加的节点

我该怎么做？ 谢谢大家!

这就是我到目前为止所做的：

.py文件：

    import sqlite3

from kivy.app import App
from kivy.lang import Builder
from kivy.uix.button import Button
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.uix.treeview import TreeView, TreeViewNode
from functools import partial

Builder.load_file("test1.kv")


class TreeViewButton(Button, TreeViewNode):
    id = ""
    def clk(self):
        print(id)

class OrgChart(Screen, TreeViewButton):

    def __init__(self, **kwargs):
        super(OrgChart, self).__init__(**kwargs)
        self.createTree()

    def extractNames(self):
        cur = sqlite3.connect('QLA_491.s3db').cursor()
        query = cur.execute('SELECT * FROM QLA_049P')
        colname = [d[0] for d in query.description]
        result_list = []
        for r in query.fetchall():
            row = {}
            for i in range(len(colname)):
                row[colname[i]] = r[i]
            result_list.append(row)
            del row

        cur.close()
        cur.connection.close()
        print(result_list)
        return result_list

    def createTree(self):
        tv = TreeView()
        for dict in self.extractNames():
            for key, value in dict.items():
                if key == "Button_ID":
                    self.ids.tv.add_node(TreeViewButton())
                    self.id=value
                    self.bind(on_press=self.clk)



sm = ScreenManager()
sm.add_widget(OrgChart())


class MainApp(App):

    def build(self):
        return sm


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

.kv文件：

#:import RiseInTransition kivy.uix.screenmanager.RiseInTransition
#:import ListAdapter kivy.adapters.listadapter.ListAdapter
#:import ListAdapter kivy.adapters.listadapter.ListAdapter
#:import ListItemButton kivy.uix.listview.ListItemButton
#:import Factory kivy.factory.Factory
#:import TreeViewLabel kivy.uix.treeview.TreeViewLabel
#:import TreeViewNode kivy.uix.treeview.TreeViewNode
#:import Image kivy.uix.image 

<OrgChart>:
    name: "OrgChart"
    ScrollView:
        GridLayout:
            cols: 3
            size_hint_y: None
            height: self.minimum_height
            do_scroll_x: False
            TreeView:
                id: tv
                root_options: {'text': 'Root directory','font_size': 15}
                size_hint_y: None
                height: self.minimum_height
            Widget:
                size_hint: [.8,.12]
            Widget:
                size_hint: [.8,.12]

#：导入RiseInTransition kivy.uix.screenmanager.RiseInTransition
#：导入ListAdapter kivy.adapters.ListAdapter.ListAdapter
#：导入ListAdapter kivy.adapters.ListAdapter.ListAdapter
#：导入ListItemButton kivy.uix.listview.ListItemButton
#：进口工厂kivy.Factory.Factory
#：导入TreeViewLabel kivy.uix.treeview.TreeViewLabel
#：导入TreeViewNode kivy.uix.treeview.TreeViewNode
#：导入图像kivy.uix.Image
:
名称：“组织结构图”
滚动视图：
网格布局：
科尔斯：3
尺寸提示：无
高度：自身最小高度
是否滚动\u x:False
TreeView：
id:电视
根目录选项：{'text'：'root directory'，'font\u size'：15}
尺寸提示：无
高度：自身最小高度
小装置：
大小提示：[.8，.12]
小装置：
大小提示：[.8，.12]

试试这个：

...

from kivy.properties import StringProperty
...


class TreeViewButton(Button, TreeViewNode):
    #id = ""
    id = StringProperty('') #or other type

    def __init__(self, **kwargs):
        super(TreeViewButton, self).__init__(**kwargs)
        self.bind(is_selected = self.clk)

    def clk(self):
        #prints only on the selection and not on the deselection
        if self.is_selected:
            print(id)

class OrgChart(Screen, TreeViewButton):
...
    def createTree(self):
        tv = TreeView()
        for dict in self.extractNames():
            for key, value in dict.items():
                if key == "Button_ID":
                    self.ids.tv.add_node(TreeViewButton(id = value))
                    #self.id=value
                    #self.bind(on_press=self.clk)

干杯