如何在kivymd python的MDDataTable中以编程方式取消选中复选框
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【中文标题】如何在kivymd python的MDDataTable中以编程方式取消选中复选框【英文标题】：How to uncheck checkbox programmatically in MDDataTable in kivymd python 【发布时间】：2021-09-08 23:15:58 【问题描述】：我正在使用带有复选框的 MDDataTable 来显示数据引用 Kivymd MDDataTable Documentation 我正在使用复选框从表中选择多条记录，但我无法在 MDDataTable 中找到取消选中的功能。
【问题讨论】：
也许你需要check=False
instance_row.ids.check.state = 'normal' 和 instance_row.ids.check.state = 'down'
【参考方案1】：
在source code挖掘后发现
instance_row.ids.check.state = 'normal'
instance_row.ids.check.state = 'down
如果您更改链接中的代码，那么当您按行时它将选中/取消选中它 （或者至少在您按行号时）。
def on_row_press(self, instance_table, instance_row):
'''Called when a table row is clicked.'''
print(instance_table, instance_row)
if instance_row.ids.check.state == 'normal':
instance_row.ids.check.state = 'down'
else:
instance_row.ids.check.state = 'normal'
编辑：
来自your link 的完整代码（含更改）。
from kivy.metrics import dp
from kivy.uix.anchorlayout import AnchorLayout
from kivy.lang import Builder
from kivy.logger import Logger
from kivymd.app import MDApp
from kivymd.uix.datatables import MDDataTable
kv = '''
BoxLayout:
orientation: "vertical"
BoxLayout:
id:button_tab
size_hint_y:None
height: dp(48)
MDFlatButton:
text: "Hello <3"
on_release:
app.update_row_data()
BoxLayout:
id:body
'''
class Example(MDApp):
def build(self):
self.data_tables = MDDataTable(
# MDDataTable allows the use of size_hint
size_hint=(0.8, 0.7),
use_pagination=True,
check=True,
column_data=[
("No.", dp(30)),
("Status", dp(30)),
("Signal Name", dp(60), self.sort_on_signal),
("Severity", dp(30)),
("Stage", dp(30)),
("Schedule", dp(30), self.sort_on_schedule),
("Team Lead", dp(30), self.sort_on_team)
],
row_data=[
("1", ("alert", [255 / 256, 165 / 256, 0, 1], "No Signal"),
"Astrid: NE shared managed", "Medium", "Triaged", "0:33",
"Chase Nguyen"),
("2", ("alert-circle", [1, 0, 0, 1], "Offline"),
"Cosmo: prod shared ares", "Huge", "Triaged", "0:39",
"Brie Furman"),
("3", (
"checkbox-marked-circle",
[39 / 256, 174 / 256, 96 / 256, 1],
"Online"), "Phoenix: prod shared lyra-lists", "Minor",
"Not Triaged", "3:12", "Jeremy lake"),
("4", (
"checkbox-marked-circle",
[39 / 256, 174 / 256, 96 / 256, 1],
"Online"), "Sirius: NW prod shared locations",
"Negligible",
"Triaged", "13:18", "Angelica Howards"),
("5", (
"checkbox-marked-circle",
[39 / 256, 174 / 256, 96 / 256, 1],
"Online"), "Sirius: prod independent account",
"Negligible",
"Triaged", "22:06", "Diane Okuma"),
],
sorted_on="Schedule",
sorted_order="ASC",
elevation=2
)
self.data_tables.bind(on_row_press=self.on_row_press)
self.data_tables.bind(on_check_press=self.on_check_press)
root = Builder.load_string(kv)
root.ids.body.add_widget(self.data_tables)
return root
def update_row_data(self, *dt):
self.data_tables.row_data = [
(
"21",
("alert", [255 / 256, 165 / 256, 0, 1], "No Signal"),
"Astrid: NE shared managed",
"Medium",
"Triaged",
"0:33",
"Chase Nguyen"
),
("32", ("alert-circle", [1, 0, 0, 1], "Offline"),
"Cosmo: prod shared ares", "Huge", "Triaged", "0:39",
"Brie Furman"),
("43", (
"checkbox-marked-circle",
[39 / 256, 174 / 256, 96 / 256, 1],
"Online"), "Phoenix: prod shared lyra-lists", "Minor",
"Not Triaged", "3:12", "Jeremy lake"),
("54", (
"checkbox-marked-circle",
[39 / 256, 174 / 256, 96 / 256, 1],
"Online"), "Sirius: NW prod shared locations",
"Negligible",
"Triaged", "13:18", "Angelica Howards"),
("85", (
"checkbox-marked-circle",
[39 / 256, 174 / 256, 96 / 256, 1],
"Online"), "Sirius: prod independent account",
"Negligible",
"Triaged", "22:06", "Diane Okuma"),
("85", (
"checkbox-marked-circle",
[39 / 256, 174 / 256, 96 / 256, 1],
"Online"), "Sirius: prod independent account",
"Negligible",
"Triaged", "22:06", "John Sakura"),
]
def on_row_press(self, instance_table, instance_row):
'''Called when a table row is clicked.'''
print(instance_table, instance_row)
if instance_row.ids.check.state == 'normal':
instance_row.ids.check.state = 'down'
else:
instance_row.ids.check.state = 'normal'
def on_check_press(self, instance_table, current_row):
'''Called when the check box in the table row is checked.'''
print(instance_table, current_row)
# Sorting Methods:
# Since the # 914 Pull request, the sorting method requires you to sort
# out the indexes of each data value for the support of selections
# The most common method to do this is with the use of the bult-in function
# zip and enimerate, see the example below for more info.
# the result given by these funcitons must be a list in the format of
# [Indexes, Sorted_Row_Data]
def sort_on_signal(self, data):
return zip(
*sorted(
enumerate(data),
key=lambda l: l[1][2]
)
)
def sort_on_schedule(self, data):
return zip(
*sorted(
enumerate(data),
key=lambda l: sum(
[int(l[1][-2].split(":")[0])*60,
int(l[1][-2].split(":")[1])]
)
)
)
def sort_on_team(self, data):
return zip(
*sorted(
enumerate(data),
key=lambda l: l[1][-1]
)
)
Example().run()
【讨论】：
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