上下文菜单未使用 PyQt5 显示正确的语言

Question

当我尝试使用 PyQt5 创建 Qt 应用程序时，我注意到 QPlainTextEdit 标准上下文菜单以 English 显示，这不是我系统的语言（葡萄牙语），尽管它的语言环境是从其父小部件正确继承的.这是预期的行为吗？如果是这样，我怎样才能添加翻译而不必重写该上下文菜单中已经存在的功能（如剪切/复制/粘贴）？

示例

此程序重现上述行为；它显示一个窗口（因此textEditor.locale().language() 与QLocale.Portuguese 具有相同的值）但上下文菜单以英文显示。

import sys
from PyQt5.QtWidgets import QApplication, QPlainTextEdit, QMainWindow
from PyQt5.QtCore import QLocale

def main():
    app = QApplication(sys.argv)

    window = QMainWindow()  

    assert(window.locale().language() == QLocale.Portuguese)    
    textEditor = QPlainTextEdit(window)

    assert(textEditor.locale().language() == QLocale.Portuguese)
    window.setCentralWidget(textEditor)
    window.show()
    sys.exit(app.exec_())


if __name__ == '__main__':
    main()

Answer 1

您需要安装QTranslator 来为您的系统语言环境添加翻译。

import sys
from PyQt5.QtWidgets import QApplication, QPlainTextEdit, QMainWindow
from PyQt5.QtCore import QLocale, QTranslator, QLibraryInfo

def main():
    app = QApplication(sys.argv)

    # Install provided system translations for current locale
    translator = QTranslator()
    translator.load('qt_' + QLocale.system().name(), QLibraryInfo.location(QLibraryInfo.TranslationsPath))
    app.installTranslator(translator)

    window = QMainWindow()

    assert(window.locale().language() == QLocale.Portuguese)
    textEditor = QPlainTextEdit(window)

    assert(textEditor.locale().language() == QLocale.Portuguese)
    window.setCentralWidget(textEditor)
    window.show()
    sys.exit(app.exec_())


if __name__ == '__main__':
    main()