问题描述
在此示例中，我使用 Kivy 2.3.0 和 Python 3.9.13。有两个主屏幕按钮。每个按钮都会打开一个弹出窗口。每个弹出窗口的按钮都绑定到一个方法。问题是绑定到 Action-2 按钮的方法的执行时间。
问题
是否可以将 method_2 作为参数传递给 popup-2，以便它能够像 popup-1 情况一样正确运行？
#!/usr/bin/python3 python3
# -*- coding: utf-8 -*-
# positioning and size of the kivy window
from kivy.config import Config
Config.set('graphics','resizable',1) # if 0, the window will have a fixed size. If 1, the window will be resizable.
Config.set('graphics','position','custom')
Config.set('graphics','left',10)
Config.set('graphics','top',10)
Config.set('graphics','width',600) # 800 max for 7" touchscreen display
Config.set('graphics','height',360) # 480 max for 7" touchscreen display
Config.set('graphics','borderless',1) # If set to 1, removes the window border/decoration. Window resizing must also be disabled to hide the resizing border.
Config.set('graphics','show_cursor',0) # Set whether or not the cursor is shown on the window.
# managing the kivy window
from kivy.core.window import Window
Window.show_cursor = True # Set whether or not the cursor is shown on the window.
# kivy modules first, if not Kivy may cause problems
import kivy
from kivy.app import App
from kivy.lang import Builder
from kivy.clock import Clock
from kivy.clock import mainthread
from kivy.properties import ObjectProperty
from kivy.uix.label import Label
from kivy.uix.popup import Popup
from kivy.uix.widget import Widget
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.factory import Factory
kivy.require('2.0.0')
# common modules
import os, sys
import time
import signal
import inspect
# set environment variables to avoid "segmentation error" due to raspbian version
os.environ["KIVY_WINDOW"] = "sdl2"
os.environ["KIVY_GL_BACKEND"] = "sdl2"
os.environ["KIVY_IMAGE"] = "sdl2"
###############################################################################################################
###############################################################################################################
# kivy gui classes
# main screen
class MainScreen(Screen):
def __init__(self, **kwargs):
self.name="MAIN SCREEN"
super(Screen, self).__init__(**kwargs)
# screen manager
class WindowManager(ScreenManager):
pass
# def __init__(self, **kwargs):
# self.name="WINDOW MANAGER"
# super(Screen, self).__init__(**kwargs)
# popup class
class Popup1(Popup):
def __init__(self, obj, **kwargs):
super(Popup1, self).__init__(**kwargs)
self.obj = obj
# popup class
class Popup2(Popup):
def __init__(self, obj, **kwargs):
super(Popup2, self).__init__(**kwargs)
self.obj = obj
######################################################################################################
######################################################################################################
# main app class
class Test(App):
# screen messages
MainScreenTitle = "MainScreenTitle"
MainScreenLabel = "MainScreenLabel"
MainScreenButtonText1 = "Popup-1"
MainScreenButtonText2 = "Popup-2"
MainScreenButtonText3 = "Exit"
def MainScreenButton1(self): # opens popup-1
# set the text of the popup
self.Popup1Button1 = "Action-1"
self.Popup1Button2 = "Dismiss"
self.Popup1Title = "Title of Popup-1"
self.Popup1Label = "Label of Popup-1"
# set the popup structure
self.popupMessage = Popup1(self)
self.popupMessage.open()
def MainScreenButton2(self): # opens popup-2
# set the text of the popup
self.Popup2Button1 = "Action-2"
self.Popup2Button2 = "Dismiss"
self.Popup2Title = "Title of Popup-2"
self.Popup2Label = "Label of Popup-2"
self.popupMethod = self.method_2()
# set the popup structure
self.popupMessage = Popup2(self)
self.popupMessage.open()
def MainScreenButton3(self): # exit button
exit() # exit the app
def method_1(self):
try:
msg = "do something by pressing the button Action-1"
print(str(msg))
except Exception as e:
msg = f"exception: {str(e)}"
print(str(msg))
pass
def method_2(self):
try:
msg = "do something by pressing the button Action-2"
print(str(msg))
except Exception as e:
msg = f"exception: {str(e)}"
print(str(msg))
pass
def cancel(self):
try:
self.popupMessage.dismiss()
except Exception as e:
msg = f"dismiss popup exception: {e}"
print(str(msg))
def build(self):
sm = Builder.load_string("""
WindowManager:
canvas:
Color:
rgb: 1, 1, 1
Rectangle:
size: self.size
MainScreen:
<MainScreen>:
name: "MainScreen"
# size_hint: 1, 1
size_hint: 1, .99
auto_dismiss: True
title: app.MainScreenTitle
title_align: "center"
BoxLayout:
orientation: "vertical"
spacing: 10
BoxLayout:
orientation: "horizontal"
spacing: 5
size_hint: 1, 0.3
Button:
font_size: 30
text: app.MainScreenButtonText1
on_press:
app.MainScreenButton1()
Button:
font_size: 30
text: app.MainScreenButtonText2
on_press:
app.MainScreenButton2()
Button:
font_size: 30
text: app.MainScreenButtonText3
on_press:
app.MainScreenButton3()
BoxLayout:
orientation: "horizontal"
spacing: 10
size_hint: 1, 0.7
###########################################################################
<Popup1>:
size_hint: 1, 1
auto_dismiss: False
title: app.Popup1Title
title_align: "center"
title_size: 30
BoxLayout:
orientation: "vertical"
Label:
font_size: '30sp'
text: app.Popup1Label
BoxLayout:
orientation: "horizontal"
spacing: 10
size_hint: 1, 0.5
Button:
font_size: 50
text: app.Popup1Button1
on_press:
app.method_1() # binded method
root.dismiss()
Button:
font_size: 50
text: app.Popup1Button2
on_press:
app.cancel()
root.dismiss()
<Popup2>:
size_hint: 1, 1
auto_dismiss: False
title: app.Popup2Title
title_align: "center"
title_size: 30
BoxLayout:
orientation: "vertical"
Label:
font_size: '30sp'
text: app.Popup2Label
BoxLayout:
orientation: "horizontal"
spacing: 10
size_hint: 1, 0.5
Button:
font_size: 50
text: app.Popup2Button1
on_press:
app.popupMethod # method passed as variable
root.dismiss()
Button:
font_size: 50
text: app.Popup2Button2
on_press:
app.cancel()
root.dismiss()
""")
return sm
# main #################################################################
if __name__ == '__main__':
try:
Test().run()
except Exception as e:
msg = f"exception in Test: {e}"
print(str(msg))
在您的
MainScreenButton2()self.popupMethod = self.method_2()
正在执行方法
self.method_2()self.popupMethod = self.method_2
没有
()