应用程序窗口[为什么]

标签app.exec_前加入（）以外的Python PyQt的标签被称为外观和行为为u满足任何其他选项卡，但如果app.exec_（）调用之后添加另一个使得新选项卡“分离'从主应用程序窗口。 PIC下面:)应用程序窗口[为什么]

为什么？我怎样才能让它在窗户内移动？

import threading 
import time 
import sys 

from PyQt5.QtWidgets import QApplication 
from PyQt5.QtWidgets import QFormLayout 
from PyQt5.QtWidgets import QLineEdit 
from PyQt5.QtWidgets import QTabWidget 
from PyQt5.QtWidgets import QTextEdit 
from PyQt5.QtWidgets import QWidget 

class ATry(threading.Thread): 
    def __init__(self): 
     super().__init__() 

    def run(self): 
     time.sleep(1) 
     anotherTextEdit = QTextEdit() 
     anotherLineEdit = QLineEdit() 
     anotherLayout = QFormLayout() 
     anotherLayout.addRow(anotherTextEdit) 
     anotherLayout.addRow(anotherLineEdit) 
     anotherTab = QWidget() 
     anotherTab.setLayout(anotherLayout) 
     md.addTab(anotherTab, "Outside") 

app = QApplication(sys.argv) 
md = QTabWidget() 

aTextEdit = QTextEdit() 
aLineEdit = QLineEdit() 
layout = QFormLayout() 
layout.addRow(aTextEdit) 
layout.addRow(aLineEdit) 
thisTab = QWidget() 
thisTab.setLayout(layout) 
md.addTab(thisTab, "Inside") 

a = ATry() 
a.start() 
md.show() 

app.exec_()

Screen describing the problem

来源

2016-09-07 Peter

所有Qt的图形用户界面相关的代码必须在程序的主线程中运行。如果你看一下在控制台上，你会看到一条消息'的QObject ::的setParent：无法设置父，新的父是在不同的thread'。新选项卡被分离，因为'md'不能被设置为父级。为什么这个运行没有崩溃我不知道 – user3419537

它与QTimer或信号：

import sys 
import time 

from PyQt5.QtCore import QObject 
from PyQt5.QtCore import QThread 
from PyQt5.QtCore import pyqtSignal 
from PyQt5.QtWidgets import QApplication 
from PyQt5.QtWidgets import QFormLayout 
from PyQt5.QtWidgets import QLineEdit 
from PyQt5.QtWidgets import QTabWidget 
from PyQt5.QtWidgets import QTextEdit 
from PyQt5.QtWidgets import QWidget 


class ATry(QThread): 
    def __init__(self, pointer): 
     super().__init__() 
     self.pointer = pointer 

    def run(self): 
     time.sleep(2) 
     self.pointer.emit() 


def addTheTab(): 
    anotherTextEdit = QTextEdit() 
    anotherLineEdit = QLineEdit() 
    anotherLayout = QFormLayout() 
    anotherLayout.addRow(anotherLineEdit) 
    anotherLayout.addRow(anotherTextEdit) 
    anotherTab = QWidget() 
    anotherTab.setLayout(anotherLayout) 
    md.addTab(anotherTab, "Whatever") 


class MyQObject(QObject): 
    trigger = pyqtSignal() 

    def __init__(self): 
     super().__init__() 

    def connect_and_get_trigger(self): 
     self.trigger.connect(addTheTab) 
     return self.trigger 

    def getGFX(self): 
     app = QApplication(sys.argv) 
     md = QTabWidget() 
     md.show() 
     return app, md 


obj = MyQObject() 
app, md = obj.getGFX() 
addTheTab() 
a = ATry(obj.connect_and_get_trigger()) 
a.start() 

# timer = QTimer() 
# timer.timeout.connect(proba) 
# timer.start(3000) 

app.exec_()

来源

2016-09-07 15:20:51 Peter

应用程序窗口[为什么]

回答

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