python - 如何在 PyQt5 中相对于父窗口移动子窗口？

Question

我有以下代码，但我希望新窗口不完全设置在主窗口的中心。我更愿意将它向左移动一点（例如向左移动 20 像素，向上移动 20 像素），我尝试过 moveTo() 和 moveLeft()，但无法真正弄清楚。我可以使用 topLeft() 进行管理，但它与主窗口无关。下面的代码用于居中。问题是如何更改我的代码以获得上述结果？

class Form(QMainWindow):
    def __init__(self):
        QMainWindow.__init__(self)
        self.ui = Ui_suffix_editor_panel()
        self.ui.setupUi(self)

        self.suffix_list = Suffix_window(parent=self)
        
        self.ui.show.clicked.connect(self.show_all_suffix_list)
        
        self.show()


    def show_all_suffix_list(self):
        
        self.suffix_list.ui.all_suffix_list.clear()
        open_known_list = open("known.txt", "r")
        for known in open_known_list.read().split('\n'):
            self.suffix_list.ui.all_suffix_list.insertItem(0, known)
            self.suffix_list.show()



class Suffix_window(QWidget):
    def __init__(self, parent=None):
        self.parent = parent
        QWidget.__init__(self)
        self.ui = Ui_suffix_widget()
        self.ui.setupUi(self)


        self.setWindowFlags(QtCore.Qt.FramelessWindowHint)
        self.setAttribute(QtCore.Qt.WA_TranslucentBackground)
        self.ui.exit_list_view.clicked.connect(lambda: self.close())

    def showEvent(self, event):
        if not event.spontaneous():
            geo = self.geometry()
            geo.moveLeft(self.parent.geometry().left())
            QtCore.QTimer.singleShot(0, lambda: self.setGeometry(geo))

它看起来像这样：

期望的结果：

Answer 1

解决此问题的一种方法是首先将子矩形相对于父矩形居中，然后通过相对偏移量转换结果：

class Form(QMainWindow):
    ...    

    def show_all_suffix_list(self):            
        self.suffix_list.ui.all_suffix_list.clear()
        open_known_list = open("known.txt", "r")
        for known in open_known_list.read().split('\n'):
            self.suffix_list.ui.all_suffix_list.insertItem(0, known)

        # set initial size
        rect = QtCore.QRect(0, 0, 300, 300)
        # centre on parent
        rect.moveCenter(self.geometry().center())
        # adjust by relative offset (negative values go left/up)
        rect.translate(QtCore.QPoint(-50, 0))

        self.suffix_list.setGeometry(rect)
        self.suffix_list.show()