从我的 GUI 类 PyQt4 以外的类更改进度条的值

问题描述

我有一个由 Qt 设计器创建的 GUI 类，其中有一个进度条，另一个类在其中完成了所有数字运算，在此期间我希望我的进度条定期更新.我认为我会这样做的方式是在其他班级中做这样的事情:

I have a GUI class created by Qt designer in which i have a progress bar, and another class in which all the number crunching is done during which i want my progress bar to update regularly. The way i thought i would do this it to do something like this in the other class:

gui.progressbar.setValue(some%)

但我似乎无法做到这一点.gui 类的代码类似于:

but i cant seem to make that work. the code for the gui class is something like:

from PyQt4 import QtCore, QtGui
from Run import RunProgram

class Ui_mainLayout(QtGui.QWidget):
    def setupUi(self, mainLayout):
        mainLayout.setObjectName(_fromUtf8("mainLayout"))
        def setLayout():
            self.basic_tab = QtGui.QWidget()
            self.progressBar = QtGui.QProgressBar(self.basic_tab)
        setLayout()
        RunProgram()

当时我希望能够做类似的事情:

i was then hoping to be able to do something like:

import gui

class RunProgram:
    def __init__(self):
        something = someMaths
        gui.Ui_mainLayout.progressBar.setValue(something)

但很明显，因为我没用，这不起作用，有人能指出我正确的方向吗?请和谢谢

but obviously as i am useless this doesnt work, could someone point me in the right direction? please and thank you

推荐答案

gui.Ui_mainLayout 不是一个实例化的类，而是一个类型"对象(一个可以实例化的对象 - 见 此处 以获得很好的概述).gui.Ui_mainLayout.progressBar 在 setupUi 运行时不会像它创建的那样存在.

gui.Ui_mainLayout is not an instantiated class but a 'type' object (an object that can be instantiated - see here for a good overview). gui.Ui_mainLayout.progressBar is not going to exist as its created when setupUi is run.

尝试将 progressBar 显式传递给 RunProgram:

Try passing progressBar to RunProgram explicitly:

from PyQt4 import QtCore, QtGui
from Run import RunProgram

class Ui_mainLayout(QtGui.QWidget):
    def setupUi(self, mainLayout):
        mainLayout.setObjectName(_fromUtf8("mainLayout"))
        def setLayout():
            self.basic_tab = QtGui.QWidget()
            self.progressBar = QtGui.QProgressBar(self.basic_tab)
        setLayout(self.progressBar)
        RunProgram()

和

class RunProgram:
    def __init__(self, progressBar):
        something = someMaths
        progressBar.setValue(something)

我认为可行，但我建议以后发布一个您期望运行的最小示例，它可以构成解释的基础.

I think that will work, but I suggest in future posting a minimal example you expect to run that can form the basis of the explanation.

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