向/从Kivy文本输入对话框传递列表

Question

我有一个要显示给用户的列表，但是我想将每个部分分成一个单独的textinput，因为这样更有意义。然后，我需要能够捕获这些更改并更新我的变量。

我需要获取变量以正确显示tlmanualreg，backgroundManualReg[0]并在closeit()上将更改存储回列表。

编辑：更新了裸露的弹出项目，以测试变量交换。

---

from kivy.properties import StringProperty
from os.path import join, dirname
from kivy.lang import Builder
from kivy.uix.popup import Popup
from kivy.app import App
import json

Builder.load_string("""
<-MyPopup@Popup>:
    tlpos:tlpos
    tlmanualreg:tlmanualreg
    cols: 1
    GridLayout:
        cols:3
        Label:
            text: "Location"
        Label:
            text: "Dist from Center (mm)"
        Label:
            text: "Corners of sheet (for manual-align)"
        Label:
            text: "Top-Left:"
        TextInput:
            id: tlpos
            text: root.backgroundTLPOS
        TextInput:
            id: tlmanualreg
            text: root.backgroundTLManualReg
    Button:
        size_hint_y:.1
        text: 'Update Variables'
        on_press: root.closeit()
""")


class ScreensApp(App):
    def build(self):
        content = MyPopup()
        _popup = Popup(content=content, auto_dismiss=False)
        _popup.open()


class MyPopup(Popup):
    backgroundManualReg = [[551, 218], [3168, 319], [519, 1617], [3190, 1589]]
    backgroundTLPOS = StringProperty("[0, 0]")
    backgroundTLManualReg = StringProperty("[1,1],[2,2]")

    def __init__(self, **kwargs):
        super(MyPopup, self).__init__(**kwargs)
        self.ids.tlmanualreg.text = str([1, 1])
        self.backgroundTLManualReg = str(self.backgroundManualReg[0])

    def closeit(self):
        self.backgroundTLPOS = self.tlpos.text
        print("backgroundTLPOS: ", self.backgroundTLPOS)
        print("backgroundTLManualReg: ", self.ids.tlmanualreg.text)
        print("backgroundManualReg: ", self.backgroundManualReg)


if __name__ == '__main__':
    ScreensApp().run()

Answer 1

在以下示例中，我们是：

• 使用字典。字典的键既用作Kivy小部件的ID，又用作更新值的参考。
• 根据字典中的项目（键，值）动态添加小部件
• 使用for child in reversed(self.container.children)和isinstance(child, TextInput)检索数据

示例

main.py

from kivy.properties import StringProperty, DictProperty
from kivy.lang import Builder
from kivy.uix.popup import Popup
from kivy.app import App
from kivy.uix.textinput import TextInput
from kivy.uix.label import Label
import ast

Builder.load_string("""

<HeaderCell@Label>
    text_size: self.size
    halign: "left"
    valign: "middle"

    canvas.before:
        Color:
            rgba: 1, 0.502, 0, 1
        Rectangle:
            pos: self.pos
            size: self.size

<MyPopup>:
    title: 'My Popup'
    container: container

    GridLayout:
        cols: 1

        GridLayout:
            cols: 3
            size_hint_y: 0.1

            HeaderCell:
                text: "Location"
            HeaderCell:
                text: "Dist from Center (mm)"
            HeaderCell:
                text: "Corners of sheet (for manual-align)"

        GridLayout:
            id: container
            cols:3

        Button:
            size_hint_y:.1
            text: 'Update Variables'
            on_press: root.closeit()
""")


class ScreensApp(App):

    def build(self):
        _popup = MyPopup(auto_dismiss=False)
        _popup.open()


class MyPopup(Popup):
    backgroundTLPOS = StringProperty("[0, 0]")
    bgManualRegDict = DictProperty({'Top-Left': [551, 218], 'Top-Right': [3168, 319],
                                    'Bottom-Left': [519, 1617], 'Bottom-Right': [3190, 1589]})

    def __init__(self, **kwargs):
        super(MyPopup, self).__init__(**kwargs)
        self.populate_rows()

    def populate_rows(self):
        for key, value in self.bgManualRegDict.items():
            location = Label(text="{}:".format(key), valign="middle")
            location.bind(size=location.setter('text_size'))
            bgTLpos = TextInput(text="{}".format(self.backgroundTLPOS))
            bgTLmanualReg = TextInput(id="{}".format(key), text="{}".format(value))

            self.container.add_widget(location)
            self.container.add_widget(bgTLpos)
            self.container.add_widget(bgTLmanualReg)

    def closeit(self):
        print("\ncloseit:")

        for child in reversed(self.container.children):
            if isinstance(child, TextInput):
                if child.id in self.bgManualRegDict.keys():
                    print("\tid={0}, text={1}".format(child.id, child.text))
                    self.bgManualRegDict[child.id] = ast.literal_eval(child.text)

        print("\n\tself.bgManualRegDict=", self.bgManualRegDict)


if __name__ == '__main__':
    ScreensApp().run()

输出