kivy Popup在Windows 10下失败了

时间:2016-12-06 01:32:57

标签: python multithreading popup kivy

这类似于有关Kivy早期版本的问题:Kivy Popup rendering issue 但没有找到有用的答案。

这是我使用Kivy 1.9.1和Python 2.7.12在Windows 10下使用Popup的问题的简化版本。每次弹出Popup时都不会出现此问题,但大约50%的时间都会出现此问题。症状是弹出窗口的布局有时是不正确的,有时甚至是不正确的(即,按钮文本甚至不在按钮上,或者标题甚至不在弹出窗口内)。我正在使用Thread和Queue等待Popup完成。要查看问题,请运行kivyplay.py脚本,单击“开始游戏线程”,单击弹出窗口中的“确定”按钮。弹出窗口将出现4次,如果问题没有出现,您可以再次单击“开始游戏线程”。我看到的警告信息是:

[WARNING           ] <kivy.uix.gridlayout.GridLayout object at 0x000000000ADDF118> have no cols or rows set, layout is not triggered.

我没有直接使用任何GridLayout小部件。这个相同的代码在Ubuntu 16.04下使用相同版本的Kivy和Python完美无缺地运行。

我尝试了很多不同的方法:

  • 使用线程锁而不是队列
  • 在MyPopup中创建弹出窗口而不是子类化
  • 在MyPopup中创建ModalView而不是子类化
  • 完全消除pop_test.kv,只使用Button作为弹出内容

使用ModalView可以消除GridLayout警告,但不能解决问题。看起来弹出布局越复杂,错误出现的次数越多,因此这个简单的示例不会经常显示错误。难道我做错了什么?关于如何让弹出窗口正确渲染的任何想法?我应该将此报告为错误吗?

感谢!!!

kivyplay.kv:

from kivy.app import App
from kivy.uix.relativelayout import RelativeLayout

from game_thread import GameThread

class KivyPlay(RelativeLayout):

    def __init__(self, *args):
        RelativeLayout.__init__(self, *args)

    def start_thread(self):
        print "Got a click"
        gameThread = GameThread()
        gameThread.start()

    def quit(self):
        app.stop()

class PlayApp(App):
    def build(self):
        return KivyPlay()

if __name__ == '__main__':
    app = PlayApp()
    app.run()

game_thread.py:

from threading import *
from Queue import Queue

from my_popup import MyPopup

class GameThread(Thread):

    def __init__(self):
        Thread.__init__(self, name="GameThread")
        self.daemon = True
        self.queue = Queue()


    def run(self):

        for i in range(0,4):
            popup = MyPopup("Popup Test", self.queue, i)
            popup.open()
            popReturn = self.queue.get(True)
            print "Popup #" + str(i) + " returned " + str(popReturn)

my_popup.ky:

from kivy.uix.popup import Popup
from kivy.lang import Builder

class MyPopup(Popup):

    def __init__(self, theTitle, theQueue, playerNumber):
        self.queue = theQueue
        title = theTitle
        self.player = playerNumber
        myContent = Builder.load_file('pop_test.kv')
        self.button = myContent.ids["ok_button"]
        self.button.bind(on_press=self.okButton)
        Popup.__init__(self, title=title, title_align='center', content=myContent, size_hint=(None, None), size=(400,150), auto_dismiss=False)

    def okButton(self, *args):
        self.queue.put(self.player, False)
        self.dismiss()

play.kv:

#:kivy 1.9.1

<KivyPlay>:
    canvas:
        Color:
            rgba: 1, 0, 0, 1
        Rectangle:
            pos: self.pos
            size: self.size
    Button:
        size_hint: 0.25, 0.25
        pos_hint: {'center_x': 0.5, 'y': 0.5}
        text: 'Start Game Thread'
        on_press: root.start_thread()

    Button:
        size_hint: 0.25, 0.25
        pos_hint: {'center_x': 0.5, 'y': 0.25}
        text: 'Quit'
        on_press: root.quit()

pop_test.kv:

#:kivy 1.9.1

BoxLayout:
    orientation: 'vertical'

    AnchorLayout:
        anchor_x: 'center'
        anchor_y: 'center'
        Button:
            id: ok_button
            size_hint: 0.2, 0.2
            text: 'OK'

1 个答案:

答案 0 :(得分:0)

运行super()时,您需要在顶部调用__init__,以确保在开始覆盖课程中的内容之前启动小部件。

所以我改变了你的三个文件。我没有看到任何错误(在胜利10上测试)。您可以忽略gridlayout警告。

kivy_play.py:

from kivy.app import App
from kivy.uix.relativelayout import RelativeLayout

from game_thread import GameThread

class KivyPlay(RelativeLayout):

    def __init__(self, **kwargs):
        super(KivyPlay,self).__init__(**kwargs)

    def start_thread(self):
        print "Got a click"
        gameThread = GameThread()
        gameThread.start()

    def quit(self):
        app.stop()

class PlayApp(App):
    def build(self):
        return KivyPlay()

if __name__ == '__main__':
    app = PlayApp()
    app.run()

和my_popup.py:

from kivy.uix.popup import Popup
from kivy.lang import Builder

Builder.load_file('pop_test.kv')

class MyPopup(Popup):

    def __init__(self, theTitle, theQueue, playerNumber,**kwargs):
        super(MyPopup,self).__init__(**kwargs)
        self.title = theTitle
        self.title_align='center'
        self.queue = theQueue
        self.player = playerNumber
        self.size_hint=(None, None)
        self.size=(400,150)
        self.auto_dismiss=False


    def okButton(self, *args):
        self.queue.put(self.player, False)
        self.dismiss()

pop_test.kv:

#:kivy 1.9.1

<MyPopup>:
    BoxLayout:
        orientation: 'vertical'

        AnchorLayout:
            anchor_x: 'center'
            anchor_y: 'center'
            Button:
                id: ok_button
                size_hint: 0.2, 0.2
                text: 'OK'
                on_press:root.okButton()