使用 PySide2 在 QML 中注册类型 [英] Registering a type in QML using PySide2

问题描述

我正在尝试使用 Python 创建新的 QML 类型，但在注册 QML 类型时遇到问题.但是，我收到一个错误:

I am trying to create a new QML type by using Python, but I am having trouble with registering a QML type. However, I am getting an Error:

TypeError: 'PySide2.QtQml.qmlRegisterType' called with wrong argument types:
  PySide2.QtQml.qmlRegisterType(module, str, int, int, str)
Supported signatures:
  PySide2.QtQml.qmlRegisterType(type, str, int, int, str)

所以我知道它期待一种类型，但是，在这个 blogpost 它做了类似的事情:

So I understand that its expecting a type, however, in this blogpost it does something similar:

qmlRegisterType(PieChart, 'Charts', 1, 0, 'PieChart')

这让我很困惑，我不知道自己做错了什么?

在我的 main.py 中，我有这个:

Which leaves me confused, I don't know what I'm doing wrong?

In my main.py, I have this:

...

if __name__ == '__main__':
    # Declare QApplication
    app=QApplication([])

    qmlRegisterType(CamFeed, 'CFeed', 1, 0, 'CamFeed')

    ...

CamFeed.py 看起来像这样:

CamFeed.py looks like this:

from PySide2.QtQuick import QQuickPaintedItem
from PySide2.QtGui import QPainter
from PySide2.QtCore import QObject

class CamFeed(QQuickPaintedItem):
    def __init__(self, parent=None):
        super().__init__(parent)

    # Re-implementation of the virtual function
    def paint(self, painter):
        painter.drawRect(10,10,50,50)

推荐答案

在 main.py 文件中，您肯定是通过以下方式导入 CamFeed.py 的:

Surely in the main.py file you are importing the CamFeed.py in the following way:

import CamFeed

if __name__ == '__main__':
    # Declare QApplication
    app = QApplication([])
    qmlRegisterType(CamFeed, 'CFeed', 1, 0, 'CamFeed')

在这种情况下，CamFeed 是模块(.py 文件)，因此有两种解决方案:

In that case CamFeed is the module (.py file), so there are 2 solutions:

1.

from CamFeed import CamFeed

if __name__ == '__main__':
    # Declare QApplication
    app = QApplication([])
    qmlRegisterType(CamFeed, 'CFeed', 1, 0, 'CamFeed')

2.

import CamFeed

if __name__ == '__main__':
    # Declare QApplication
    app = QApplication([])
    qmlRegisterType(CamFeed.CamFeed, 'CFeed', 1, 0, 'CamFeed')

<小时>

另一方面，按照约定小写的名称:

---

On the other hand by convention the name of the lowercase:

camfeed.py

from PySide2.QtQuick import QQuickPaintedItem
from PySide2.QtGui import QPainter
from PySide2.QtCore import QObject

class CamFeed(QQuickPaintedItem):
    def __init__(self, parent=None):
        super().__init__(parent)

    # Re-implementation of the virtual function
    def paint(self, painter):
        painter.drawRect(10,10,50,50)

ma​​in.py

from camfeed import CamFeed

if __name__ == '__main__':
    # Declare QApplication
    app = QApplication([])
    qmlRegisterType(CamFeed, 'CFeed', 1, 0, 'CamFeed')

这篇关于使用 PySide2 在 QML 中注册类型的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！