PyQT 无法对 QTextCursor 进行排队 - 如何正确更改 window 内容

Question

再次长话短说。我正在编写 python 库，用于将非常简单的文本输出到 Qt 的 QTextBrowser window（存储在 window.ui 中）。据我之前发现，不应直接访问 Qt 对象。那么，什么是摆脱的正确方法：

QObject::connect: Cannot queue arguments of type 'QTextCursor'
(Make sure 'QTextCursor' is registered using qRegisterMetaType().)

当 'printing' 来自其他线程时出错？

# -*- coding: utf-8 -*-
from PyQt4 import QtGui, QtCore, uic
import sys
import time


def async(func):
    from threading import Thread
    from functools import wraps

    @wraps(func)
    def async_func(*args, **kwargs):
        func_hl = Thread(target=func, args=args, kwargs=kwargs)
        func_hl.start()
        return func_hl
    return async_func


class GuiFile(QObject):   # add also GUI_FORM
    def __init__(self, filename):
        QObject.__init__(self, None)
        self.filename = filename
        self.myapp = sys.argv
        self.app = QtGui.QApplication(self.myapp)

    def show(self):
        self.window = uic.loadUi(self.filename)
        self.window.show()


    def pprint(self, text):
        gui_object = self.window.outbox
        gui_object.insertHtml(text + '<br>')
        gui_object.moveCursor(QtGui.QTextCursor.End)

if __name__ == '__main__':

    @async
    def other_thead():
        time.sleep(1)
        for x in xrange(3):
            print x
            gui.pprint(u'Hello %s' % x)

    gui = GuiFile('window.ui')
    gui.show()
    other_thead()
    sys.exit(gui.app.exec_())

请明确地告诉我，因为我在阅读有关这些插槽和 Qt theads 的文章时完全被困住了并且感到困惑。

window.ui link 在这里：https://yadi.sk/d/U3esbMcIkvbFc

upd1:

我也试过发出这样的信号：

    self.connect(self.window.outbox, SIGNAL("print"), self.real_print)


    def real_print(self, text, **kwargs):
        print 'RP'
        gui_object = self.window.outbox

        """ What if we print to other field? """

        if kwargs.get('field'):
            field = kwargs['field']

            for elem in dir(self.window):
                if str(elem) == field:
                    gui_object = getattr(self.window, elem)

        gui_object.insertHtml(text + '<br>')
        gui_object.moveCursor(QTextCursor.End)

    def pprint(self, text, **kwargs):
        self.emit(SIGNAL("print"), text)

但还是不行。

Answer 1

天哪，解决了！

        self.connect(self, SIGNAL("print"), self.real_print)

PyQT 无法对 QTextCursor 进行排队 - 如何正确更改 window 内容

PyQT Cannot queue QTextCursor - how to properly change window content

python

pyqt

pyqt4