如何在我的 class 中继承 QtWidgets.QWidget 并使我的 class 类型为 - QtWidgets.QWidget？

Question

我正在尝试在 Maya 中编写一些代码，如果这会在下面的脚本示例中造成任何混淆，我深表歉意。问题是我想制作我的自定义 PyQt class，稍后将在我的布局中用作小部件，但我对这件事缺乏了解，导致错误

# RuntimeError: '__init__' method of object's base class (test) not called. #

我阅读了一些关于该错误的主题，人们建议使用 super() 修复它。我试图输入 "super()" ，然后出现此错误：

# TypeError: PySide2.QtCore.QObject isn't a direct base class of test #

有人可以帮我解决这个问题吗？

from PySide2 import QtGui, QtCore, QtWidgets
from shiboken2 import wrapInstance
import maya.OpenMaya as om
import maya.OpenMayaUI as omui
import maya.cmds as cmds
import os, functools


def getMayaWindow():
    pointer = omui.MQtUtil.mainWindow()
    if pointer is not None:
        return wrapInstance(long(pointer), QtWidgets.QWidget)

class testUi():
    def __init__(self):
        self.window = 'vl_test'
        self.title = 'Test Remastered'
        self.size = (1000, 650)

    def create(self):
        if cmds.window(self.window, exists=True):
            cmds.deleteUI(self.window, window=True)

        self.parentWindow = getMayaWindow()
        self.mainWindow = QtWidgets.QMainWindow(self.parentWindow)
        self.mainWindow.setObjectName(self.window)
        self.mainWindow.setWindowTitle(self.title)

        self.mainWidget = QtWidgets.QWidget()
        self.mainWindow.setCentralWidget(self.mainWidget)
        self.mainLayout = QtWidgets.QFormLayout(self.mainWidget)
        testik = test(self)
        self.mainLayout.addWidget(testik)

        self.mainButton = QtWidgets.QPushButton()
        self.mainLayout.addWidget(self.mainButton)
        self.mainButton.clicked.connect(partial(self.load_selected))


class test(QtWidgets.QWidget):
    def __init__(self, parent=None, maya_transform_nodes=[]):
        #super(QtWidgets.QWidget, self ).__init__(parent)
        qWid = QtWidgets.QWidget()
        self.setMinW = qWid.setMinimumWidth(300)
        self.setMinH = qWid.setMinimumHeight(300)
        self.sss = qWid.setStyleSheet("border:1px solid rgb(0, 255, 0); ")
        self.items = []

        self.transform_move = QtGui.QTransform()
        self.transform_scale = QtGui.QTransform()

        self.prev_mouse_pos = QtCore.QPoint(0, 0)

        self.color = QtGui.QColor(0, 255, 50, 50)
        self.clicked_color = QtGui.QColor(0, 255, 50, 150)
        self.right_clicked_color = QtGui.QColor(255, 0, 0, 150)

v = testUi()
v.create()

Answer 1

当您创建 class 时，您可以选择从另一个对象继承，在本例中可能是 QDialog，因为它是您工具的主要 window。仅仅继承它是不够的，你必须调用 QDialog 的构造函数才能正确初始化，你可以使用 super.

使用 super，您可以选择运行从您的 class 对象继承的方法。它看起来像这样：super(YOUR_CLASS_NAME, INSTANCE).METHOD_TO_RUN(PARAMETERS_TO_PASS)。所以更具体地说，运行你的 __init__ 它将是：super(testUi, self).__init__(parent)，这将解决它。

这可能是一个糟糕的解释，所以请 Google super 提供更好的示例。

我对您的脚本进行了一些编辑以简化它，并在其中留下了一些评论：

from PySide2 import QtGui, QtCore, QtWidgets
from shiboken2 import wrapInstance
import maya.OpenMaya as om
import maya.OpenMayaUI as omui
import maya.cmds as cmds
import os, functools


def getMayaWindow():
    pointer = omui.MQtUtil.mainWindow()
    if pointer is not None:
        return wrapInstance(long(pointer), QtWidgets.QWidget)


class testUi(QtWidgets.QDialog):  # Need to inherit from a `QObject`

    def __init__(self, parent=None):  # It's typical to include the `parent` parameter and pass that through `super`.
        # If nothing was passed for parent, default to Maya's main window.
        if parent is None:
            parent = getMayaWindow()

        super(testUi, self).__init__(parent)  # Call `super` with the class's name, testUi, and its instance, self.
        self.window = 'vl_test'
        self.title = 'Test Remastered'
        self.size = (1000, 650)

        self.create()  # Just automatically call create in the instance's constructor.

    def create(self):
        if cmds.window(self.window, exists=True):
            cmds.deleteUI(self.window, window=True)

        self.setWindowTitle(self.title)
        self.resize(QtCore.QSize(*self.size))

        self.testik = test(self)  # Add `self.` so it belongs to this instance.

        self.mainButton = QtWidgets.QPushButton()

        self.mainLayout = QtWidgets.QVBoxLayout()  # QVBoxLayout seems to give a better result.
        self.mainLayout.addWidget(self.testik)
        self.mainLayout.addWidget(self.mainButton)
        self.setLayout(self.mainLayout)  # Don't forget to make this widget actually set to this layout and use it.


class test(QtWidgets.QFrame):

    def __init__(self, parent=None, maya_transform_nodes=[]):
        super(test, self).__init__(parent)  # Call `super` with the class's name, test, and its instance, self.

        self.setMinimumWidth(300)
        self.setMinimumHeight(300)
        self.setStyleSheet("QWidget {border: 1px solid rgb(0, 255, 0)};")

        self.items = []

        self.transform_move = QtGui.QTransform()
        self.transform_scale = QtGui.QTransform()

        self.prev_mouse_pos = QtCore.QPoint(0, 0)

        self.color = QtGui.QColor(0, 255, 50, 50)
        self.clicked_color = QtGui.QColor(0, 255, 50, 150)
        self.right_clicked_color = QtGui.QColor(255, 0, 0, 150)


v = testUi()
v.show()  # Call show to show it!

我假设您正在尝试构建天气图是否正确？如果是，您可能需要查看 QGraphicsView 以使用项目填充 window 并处理大部分逻辑。否则你将不得不 100% 自己完成，这可能很有趣，但需要做很多额外的工作。

如何在我的 class 中继承 QtWidgets.QWidget 并使我的 class 类型为 - QtWidgets.QWidget？

How to inherit QtWidgets.QWidget in my class and make my class type - QtWidgets.QWidget?

python

pyqt

pyside

maya