Python 如何使用kivy和RecycleView编辑SQLite数据库值
我正在尝试使用kivy用python显示sqlite3数据库。测试了ikolim的解决方案,该解决方案在将数据库内容显示到RecycleView的按钮标签中时效果良好: 当按下按钮时,弹出和编辑功能按预期显示: 它会编辑所选按钮的文本,如下一个屏幕截图所示: ..但不是sqlite数据库值是否可以将用户在Kivy应用程序中所做的更改反映到sqlite数据库中的值? 代码如下: test.py 试验电压(千伏)Python 如何使用kivy和RecycleView编辑SQLite数据库值,python,sqlite,kivy,Python,Sqlite,Kivy,我正在尝试使用kivy用python显示sqlite3数据库。测试了ikolim的解决方案,该解决方案在将数据库内容显示到RecycleView的按钮标签中时效果良好: 当按下按钮时,弹出和编辑功能按预期显示: 它会编辑所选按钮的文本,如下一个屏幕截图所示: ..但不是sqlite数据库值是否可以将用户在Kivy应用程序中所做的更改反映到sqlite数据库中的值? 代码如下: test.py 试验电压(千伏) #:kivy 1.10.0 : 标题:“弹出窗口” 大小提示:无,无 尺码:40
#:kivy 1.10.0
:
标题:“弹出窗口”
大小提示:无,无
尺码:400400
自动解除:错误
盒子布局:
方向:“垂直”
文本输入:
id:txtinput
文本:root.obj_text
按钮:
大小提示:1,0.2
文本:“保存更改”
发布时:
root.obj.update_更改(txtinput.text)
根目录
按钮:
大小提示:1,0.2
文本:“取消更改”
发布时:root.disclose()
:
#绘制背景以指示选择
在以下情况之前:
颜色:
rgba:(.0,0.9,1,3)如果自选,则为其他(0,0,0,1)
矩形:
pos:self.pos
大小:self.size
:
盒子布局:
方向:“垂直”
网格布局:
大小提示:1,无
尺寸提示:无
身高:25
科尔斯:4
标签:
正文:“姓名”
标签:
文本:“ID”
标签:
正文:“CB时间”
标签:
正文:“备注”
盒子布局:
回收审查:
viewclass:“SelectableButton”
数据:[{'text':str(x)}用于根目录中的x。数据项]
SelectableRecycleGridLayout:
科尔斯:4
默认大小:无,dp(26)
默认大小提示:1,无
尺寸提示:无
高度:自身最小高度
方向:“垂直”
多选:正确
触摸多选:真
为了反映对sql
的更改,您需要使用update
命令来更新sql
表。为了反映对sql
的更改,您需要使用update
命令来更新sql
表
import sqlite3
from kivy.app import App
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.recycleview.views import RecycleDataViewBehavior
from kivy.uix.button import Button
from kivy.properties import BooleanProperty, ListProperty, StringProperty, ObjectProperty
from kivy.uix.recyclegridlayout import RecycleGridLayout
from kivy.uix.behaviors import FocusBehavior
from kivy.uix.recycleview.layout import LayoutSelectionBehavior
from kivy.uix.popup import Popup
connection = sqlite3.connect("demo.db", isolation_level=None)
cursor = connection.cursor()
class TextInputPopup(Popup):
obj = ObjectProperty(None)
obj_text = StringProperty("")
def __init__(self, obj, **kwargs):
super(TextInputPopup, self).__init__(**kwargs)
self.obj = obj
self.obj_text = obj.text
class SelectableRecycleGridLayout(FocusBehavior, LayoutSelectionBehavior,
RecycleGridLayout):
''' Adds selection and focus behaviour to the view. '''
class SelectableButton(RecycleDataViewBehavior, Button):
''' Add selection support to the Button '''
index = None
selected = BooleanProperty(False)
selectable = BooleanProperty(True)
def refresh_view_attrs(self, rv, index, data):
''' Catch and handle the view changes '''
self.index = index
return super(SelectableButton, self).refresh_view_attrs(rv, index, data)
def on_touch_down(self, touch):
''' Add selection on touch down '''
if super(SelectableButton, self).on_touch_down(touch):
return True
if self.collide_point(*touch.pos) and self.selectable:
return self.parent.select_with_touch(self.index, touch)
def apply_selection(self, rv, index, is_selected):
''' Respond to the selection of items in the view. '''
self.selected = is_selected
def on_press(self):
popup = TextInputPopup(self)
popup.open()
def update_changes(self, txt):
self.text = txt
class RV(BoxLayout):
data_items = ListProperty([])
def __init__(self, **kwargs):
super(RV, self).__init__(**kwargs)
self.get_users()
def get_users(self):
cursor.execute("CREATE TABLE IF NOT EXISTS Callbacks(cName TEXT, cID INT, cbTime INT, cbRems TEXT)")
cursor.execute("INSERT INTO Callbacks VALUES ('Client1','1','1500','Test1')")
cursor.execute("INSERT INTO Callbacks VALUES ('Client2','2','1600','Test2')")
cursor.execute("INSERT INTO Callbacks VALUES ('Client3','3','1700','Test3')")
connection.commit()
cursor.execute("SELECT * FROM Callbacks ORDER BY ROWID DESC")
rows = cursor.fetchall()
# create data_items
for row in rows:
for col in row:
self.data_items.append(col)
for row in rows:
print(self.data_items)
class TestApp(App):
title = "Kivy RecycleView & SQLite3 Demo"
def build(self):
return RV()
if __name__ == "__main__":
TestApp().run()
#:kivy 1.10.0
<TextInputPopup>:
title: "Popup"
size_hint: None, None
size: 400, 400
auto_dismiss: False
BoxLayout:
orientation: "vertical"
TextInput:
id: txtinput
text: root.obj_text
Button:
size_hint: 1, 0.2
text: "Save Changes"
on_release:
root.obj.update_changes(txtinput.text)
root.dismiss()
Button:
size_hint: 1, 0.2
text: "Cancel Changes"
on_release: root.dismiss()
<SelectableButton>:
# Draw a background to indicate selection
canvas.before:
Color:
rgba: (.0, 0.9, .1, .3) if self.selected else (0, 0, 0, 1)
Rectangle:
pos: self.pos
size: self.size
<RV>:
BoxLayout:
orientation: "vertical"
GridLayout:
size_hint: 1, None
size_hint_y: None
height: 25
cols: 4
Label:
text: "Name"
Label:
text: "ID"
Label:
text: "CB Time"
Label:
text: "Remarks"
BoxLayout:
RecycleView:
viewclass: 'SelectableButton'
data: [{'text': str(x)} for x in root.data_items]
SelectableRecycleGridLayout:
cols: 4
default_size: None, dp(26)
default_size_hint: 1, None
size_hint_y: None
height: self.minimum_height
orientation: 'vertical'
multiselect: True
touch_multiselect: True