基维.动态向树视图添加节点

Question

我正在尝试循环add_nodes到TreeView。

我有一个包含雇用信息和分配 ID 的 sql 数据库。我需要从数据库中添加具有名称的节点，并从数据库中分配变量 idTreeViewButton它们各自的 id。我还需要将方法 clk 绑定到添加的节点。

我该怎么做？ 谢谢！

这是我到目前为止所拥有的：

.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]

Answer 1

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。