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Python 3.x 巨蟒,基维。通过下拉菜单从动态创建的按钮获取文本_Python 3.x_Kivy - Fatal编程技术网

Python 3.x 巨蟒,基维。通过下拉菜单从动态创建的按钮获取文本

Python 3.x 巨蟒,基维。通过下拉菜单从动态创建的按钮获取文本,python-3.x,kivy,Python 3.x,Kivy,我正在动态创建按钮,并为每个按钮动态创建下拉列表。选择该按钮后,主按钮上的文本值将更新。 我想将主按钮更新后的文本值放入Run_DrawsTest()。 我一直在尝试运行按钮ID来获取文本值。通常是btn\u txt=self.ids.button\u id\u name.text。 由于按钮是动态创建的,我无法预测将创建的数量,我不确定如何获得文本 for i in range(row_count): drpName.append(DropDown())

我正在动态创建按钮,并为每个按钮动态创建下拉列表。选择该按钮后,主按钮上的文本值将更新。 我想将主按钮更新后的文本值放入Run_DrawsTest()。 我一直在尝试运行按钮ID来获取文本值。通常是btn\u txt=self.ids.button\u id\u name.text。 由于按钮是动态创建的,我无法预测将创建的数量,我不确定如何获得文本

        for i in range(row_count):
            drpName.append(DropDown())
            btnName = Button(text="Select", size_hint_y= self.size_hint_y)
            self.cnt_btns += 1
            for e in self.sel:
                self.ssbtn = ('tbtn' +  str(sbtn))
                sbtn += 1

                btn = Button(text=e, size_hint_y=None, height=25, id=self.ssbtn)
                btn.bind(on_release=lambda btn=btn, dropdown=drpName[i]: dropdown.select(btn.text))
                drpName[i].add_widget(btn)
            btnName.bind(on_release=drpName[i].open)
            drpName[i].bind(on_select=lambda instance, x, btn=btnName: setattr(btn, 'text', x))

            self.ids.select_btn.add_widget(btnName)
            self.my_btn_names.append(self.ssbtn)

def Run_Draws_Test (self):
    counter = 0
    vals = [ ]
    while counter != self.cnt_btns:
        btn_ids = (self.my_btn_names[counter])
        txt = ('txt' + str(counter))

        s = btn_ids
        btn_texts = str(txt + ' = ' + "self.ids." + s + ".text")
        vals.append(btn_texts)

        executable_code = (vals[counter])
        print(executable_code)
        time.sleep(3)
        exec(str(executable_code))
        print(txt)
        counter += 1
使用on_select事件将所选文本传递给方法。有关详细信息,请参阅代码片段和示例

代码片段-kv文件 试验电压(千伏)
#:kivy 1.10.0
#:进口工厂kivy.Factory.Factory
:
在屏幕上选择:
app.root.ids.Notes.ids.mainbutton.text='{}'。格式(args[1])
app.root.Run\u测试(args[1])
:
方向:“垂直”
浮动布局:
大小提示:无,无
在以下情况之前:
颜色:
rgba:1,1,0,1
按钮:
id:Main按钮
文本:“菜单名”
字体大小:20
大小提示:无,无
尺寸:150,50
邮政编码:20400
发布时:Factory.CustomDropDown().open(self)
:
在以下情况之前:
颜色:
rgba:0.5,0.5,0.5,0.5
矩形:
位置:0,0
尺寸:800480
笔记:
id:注释
名称:'注释'
输出

谢谢ikolim,我今天会看一看
<CustomDropDown>:
    on_select:
        app.root.ids.Notes.ids.mainbutton.text = '{}'.format(args[1])
        app.root.Run_Draws_Test(args[1])
from kivy.app import App
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.uix.dropdown import DropDown
from kivy.uix.button import Button
from kivy.core.window import Window


Window.size = (800, 480)


class CustomDropDown(DropDown):

    def __init__(self, **kwargs):
        super(CustomDropDown, self).__init__(**kwargs)
        self.add_buttons()

    def add_buttons(self):
        for index in range(10):
            # When adding widgets, we need to specify the height manually
            # (disabling the size_hint_y) so the dropdown can calculate
            # the area it needs.

            btn = Button(text='Value %d' % index, size_hint_y=None, height=44)

            # for each button, attach a callback that will call the select() method
            # on the dropdown. We'll pass the text of the button as the data of the
            # selection.
            btn.bind(on_release=lambda btn: self.select(btn.text))

            # then add the button inside the dropdown
            self.add_widget(btn)


class Notes(Screen):
    pass


class MyScreenManager(ScreenManager):

    def Run_Draws_Test(self, value):
        print(value)


class TestApp(App):
    title = "Kivy Drop-Down List Demo"

    def build(self):
        return MyScreenManager()


if __name__ == '__main__':
    TestApp().run()
#:kivy 1.10.0
#:import Factory kivy.factory.Factory

<CustomDropDown>:
    on_select:
        app.root.ids.Notes.ids.mainbutton.text = '{}'.format(args[1])
        app.root.Run_Draws_Test(args[1])


<Notes>:
    orientation: "vertical"

    FloatLayout:
        size_hint: None, None

        canvas.before:
            Color:
                rgba: 1, 1, 0, 1

        Button:
            id: mainbutton
            text: "Menu name"
            font_size: 20
            size_hint: None, None
            size: 150, 50
            pos: 20,400
            on_release: Factory.CustomDropDown().open(self)

<MyScreenManager>:
    canvas.before:
        Color:
            rgba: 0.5, 0.5, 0.5, 0.5
        Rectangle:
            pos: 0,0
            size: 800, 480
    Notes:
        id:Notes
        name: 'Notes'