解决方案

Question

我在切换按钮时遇到麻烦。在MainScreen中，有一个按钮将打开一个弹出窗口。在弹出窗口中，有一个按钮，当按下该按钮时，将显示DisplayScreen。

这是我的python代码。

import Konva from 'konva'
import map from './../resources/unpar.svg'

const width = window.innerWidth
const height = window.innerHeight

// scale is temp
let stage = new Konva.Stage({
  container: 'canvas',
  width,
  height,
  offset: {
    x: width / 2,
    y: height / 2
  },
  x: width / 2,
  y: height / 2
})

let layer = new Konva.Layer({draggable: true})

let testCircle = new Konva.Circle({
  x: 633,
  y: 590,
  radius: 10,
  fill: 'white',
  stroke: 'black'
})

testCircle.on('mousemove', function () {
  tooltip.position({
    x: testCircle.x() - 90,
    y: testCircle.y() - 50
  })
  tooltip.text('Pintu Depan Gedung 10')
  tooltip.show()
  layer.batchDraw()
})

testCircle.on('mouseout', function () {
  tooltip.hide()
  layer.draw()
})

var tooltip = new Konva.Text({
  text: '',
  fontFamily: 'Calibri',
  fontSize: 18,
  padding: 5,
  textFill: 'white',
  fill: 'black',
  alpha: 0.75,
  visible: false
})

let imageObj = new Image()

imageObj.onload = function () {
  const map = new Konva.Image({
    image: imageObj,
  })

  layer.add(map)
  layer.add(testCircle)
  layer.add(tooltip)
  stage.add(layer)
}

imageObj.src = map

export default stage

这是我的奇异密码

#this is MainScreen class
class MainScreen(Screen):
    def __init__(self, **kwargs):
        super().__init__(**kwargs)

    def displayConfirmationDialog(self):
        confirmationDialog = self.MainScreenConfirmationDialog()
        confirmationDialog.setMessage()
        confirmationDialog.open()

     #this is the function of the button
    def update(self):
          self.displayConfirmationDialog()

    #this is the popup class
    class MainScreenConfirmationDialog(Popup):


        def setYesButton(self):

            screenManager.add_widget(DisplayScreen())
            self.manager.current = 'display_screen'

#this is the DisplayScreen class
class DisplayScreen(Screen):
    pass

当我运行它时，它显示了一个错误

<MainScreen>:
    Button:
        text: 'UPDATE'
        on_press:root.update()

<MainScreenConfirmationDialog>:
    GridLayout:
        rows: 3
        Label:
            id: lbl_confirmation
        Button:
            id: b
            text: 'YES'
            on_press: root.setYesButton()
<DisplayScreen>:
    name: 'display_screen'
    GridLayout:
        rows: 4
        row_force_default: True
        row_default_height: 40
        Label:
            text: 'HELLO'
            id: lbl_display_name

Answer 1

“弹出”窗口小部件无权访问屏幕管理器。

解决方案

由于您可以访问全局变量screenManager，因此将self.manager.current = 'display_screen'替换为screenManager.current = 'display_screen'

Kivy：在弹出窗口之间切换

1 个答案:

解决方案