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Python 如何使用kivy和RecycleView编辑SQLite数据库值_Python_Sqlite_Kivy - Fatal编程技术网

Python 如何使用kivy和RecycleView编辑SQLite数据库值

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

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: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

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