Question

我有一个功能范围问题。我需要更新“cardTableLayout”＆＃39;什么时候丢弃＆＃39;调用evaluate函数后按下按钮。我该怎么做呢？我知道这是一个kv布局语言问题。我不确定如何参与＆card; CardableLayout＆＃39;来自内部＆＃39; buttonClick_callback。＆＃39; python代码



import sys
from os import path, listdir
from random import choice
sys.path.append('libs')
from good_deal import *
from kivy.app import App
from kivy.lang import Builder
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.floatlayout import FloatLayout
from kivy.core.audio import SoundLoader
from kivy.uix.button import Button
from kivy.uix.image import Image
from kivy.uix.behaviors import ToggleButtonBehavior  
from kivy.clock import mainthread
randomSong = choice(listdir('music'))
backgroundMusic = SoundLoader.load(path.join('music', randomSong))
backgroundMusic.play()
backgroundMusic.loop = True
cardImagesGlobal = []
hand, deck = deal()
class ScreenManagement(ScreenManager): pass
class Card(ToggleButtonBehavior, Image): pass
class GameButton(Button): pass
def buttonClick_callback(self):
    buttonClickSound = SoundLoader.load(path.join('sounds', 'buttonClick.ogg'))
    buttonClickSound.play()
    index = 0 
    for items in cardImagesGlobal:
        if items.state == 'down':
            hand.marked.append(index)
            index += 1
    discard(hand, deck)
    evaluate(hand)
class CardTableScreen(Screen):
    @mainthread
    def on_enter(self):
        global cardImagesGlobal
        cardImages = []
        self.ids['handType'].text = hand.type
        index = 0
        for items in hand.ordered:
            cardImages.append(Card(source = hand.filenames[index]))
            self.ids['handLayout'].add_widget(cardImages[index])
            index += 1
        cardImagesGlobal = cardImages
        discardButton = GameButton(text = 'DISCARD')
        discardButton.bind(on_press = buttonClick_callback)
        self.ids['cardTableLayout'].add_widget(discardButton)
layoutFile = Builder.load_file('main.kv')
class Main(App):
    def build(self):
        self.title = 'Good Deal Poker'
        return layoutFile
if __name__ == "__main__":
    Main().run()

import sys from os import path, listdir from random import choice sys.path.append('libs') from good_deal import * from kivy.app import App from kivy.lang import Builder from kivy.uix.screenmanager import ScreenManager, Screen from kivy.uix.boxlayout import BoxLayout from kivy.uix.floatlayout import FloatLayout from kivy.core.audio import SoundLoader from kivy.uix.button import Button from kivy.uix.image import Image from kivy.uix.behaviors import ToggleButtonBehavior from kivy.clock import mainthread randomSong = choice(listdir('music')) backgroundMusic = SoundLoader.load(path.join('music', randomSong)) backgroundMusic.play() backgroundMusic.loop = True cardImagesGlobal = [] hand, deck = deal() class ScreenManagement(ScreenManager): pass class Card(ToggleButtonBehavior, Image): pass class GameButton(Button): pass def buttonClick_callback(self): buttonClickSound = SoundLoader.load(path.join('sounds', 'buttonClick.ogg')) buttonClickSound.play() index = 0 for items in cardImagesGlobal: if items.state == 'down': hand.marked.append(index) index += 1 discard(hand, deck) evaluate(hand) class CardTableScreen(Screen): @mainthread def on_enter(self): global cardImagesGlobal cardImages = [] self.ids['handType'].text = hand.type index = 0 for items in hand.ordered: cardImages.append(Card(source = hand.filenames[index])) self.ids['handLayout'].add_widget(cardImages[index]) index += 1 cardImagesGlobal = cardImages discardButton = GameButton(text = 'DISCARD') discardButton.bind(on_press = buttonClick_callback) self.ids['cardTableLayout'].add_widget(discardButton) layoutFile = Builder.load_file('main.kv') class Main(App): def build(self): self.title = 'Good Deal Poker' return layoutFile if __name__ == "__main__": Main().run() kv文件

ScreenManagement:
    CardTableScreen:
<Card>:
    size_hint: (.95, .95)
<GameButton>:
    size_hint: (.20, .10)
<CardTableScreen>:
    name: 'cardTableScreen'
    FloatLayout:
        name: 'cardTableLayout'
        id: cardTableLayout
        canvas.before:
            Color:
                rgba: 0,.25,0,1
            Rectangle:
                pos: self.pos
                size: self.size
        Label:
            name: 'handType'
            id: handType
            font_size: '20sp'
            pos_hint: {'center_x':.5, 'center_y':.95}
        BoxLayout:
            size_hint: (1, .30)
            pos_hint: {'center_x':.5, 'center_y':.75}
            name: 'handLayout'
            id: handLayout
            orientation: 'horizontal'
            canvas.before:
                Color:
                    rgba: 0,.25,0,1
                Rectangle:
                    pos: self.pos
                    size: self.size

Answer 1

该按钮已添加到cardTableLayout。在按下时，它执行一个名为buttonClick_callback的函数，将自身作为第一个参数传递。

这样可以通过调用cardTableLayout来引用buttonClick_callback中的self.parent。

Answer 2

问题出在导入的good_deal库中。传入的值未正确更新。一旦纠正，画布正在更新。

Kivy从调用布局的函数外部更新窗口小部件图像

2 个答案: