有没有办法在父窗口小部件（PySide/Qt）上覆盖多个项目

我有一个主要的父窗口小部件，我希望在父窗口小部件的顶部有几个布局

使用父窗口小部件初始化布局将把布局放在父窗口小部件的顶部。我喜欢这一点，并且希望对同一个父窗口小部件执行多次（左、上、下和右）

我使用了一个QGridLayout和不同的子布局，但这导致了布局的调整，并迫使它们变小。最后添加的任何覆盖都应位于其他项目的顶部

下面是我想要的一个非常简单的例子

import sys
from PySide import QtGui, QtCore


class Overlay(QtGui.QBoxLayout):
    """Overlay widgets on a parent widget."""

    def __init__(self, parent=None, location="left"):
        super().__init__(QtGui.QBoxLayout.TopToBottom, parent)

        if location == "left" or location == "right":
            self.setDirection(QtGui.QBoxLayout.TopToBottom)
            if location == "right":
                self.setAlignment(QtCore.Qt.AlignRight)
        elif location == "top" or location == "bottom":
            self.setDirection(QtGui.QBoxLayout.LeftToRight)
            if location == "bottom":
                self.setAlignment(QtCore.Qt.AlignBottom)

        self.css = "QWidget {background-color: lightskyblue; color: white}"
    # end Constructor

    def addWidget(self, widget):
        super().addWidget(widget)

        widget.setStyleSheet(self.css)
    # end addWidget
# end class Overlay

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

    window = QtGui.QMainWindow()
    window.show()

    widg = QtGui.QTreeView()
    window.setCentralWidget(widg)

    left = Overlay(widg, "left")
    left.addWidget(QtGui.QLabel("HELLO"))
    left.addWidget(QtGui.QLabel("WORLD!"))

    top = Overlay(widg, "top")
    top.addWidget(QtGui.QLabel("Hello"))
    top.addWidget(QtGui.QLabel("World!"))

    right = Overlay(location="right")
    right.setParent(widg)
    right.addWidget(QtGui.QLabel("hello"))
    right.addWidget(QtGui.QLabel("world!"))

    return app.exec_()
# end main

if __name__ == '__main__':
    sys.exit(main())

是否存在具有相同父级的多个布局？如果没有，是否有办法创建一个虚拟小部件，它将与父小部件一起移动，并让覆盖层使用多个虚拟小部件作为其父小部件

也

做的事情与

layout = QtGui.QBoxLayout(QtGui.QBoxLayout.TopToBottom)
layout.setParent(parent_widget)

---

初始化对不同的父级做了什么？

我通过创建自己的主自定义布局解决了这个问题。OverlyCenter将主窗口小部件作为其父窗口小部件，您只需将其他布局添加到此布局

import sys
from PySide import QtGui, QtCore


class OverlayCenter(QtGui.QLayout):
    """Layout for managing overlays."""

    def __init__(self, parent):
        super().__init__(parent)

        # Properties
        self.setContentsMargins(0, 0, 0, 0)

        self.items = []
    # end Constructor

    def addLayout(self, layout):
        """Add a new layout to overlay on top of the other layouts and widgets."""
        self.addChildLayout(layout)
        self.addItem(layout)
    # end addLayout

    def __del__(self):
        """Destructor for garbage collection."""
        item = self.takeAt(0)
        while item:
            item = self.takeAt(0)
    # end Destructor

    def addItem(self, item):
        """Add an item (widget/layout) to the list."""
        self.items.append(item)
    # end addItem

    def count(self):
        """Return the number of items."""
        return len(self.items)
    # end Count

    def itemAt(self, index):
        """Return the item at the given index."""
        if index >= 0 and index < len(self.items):
            return self.items[index]

        return None
    # end itemAt

    def takeAt(self, index):
        """Remove and return the item at the given index."""
        if index >= 0 and index < len(self.items):
            return self.items.pop(index)

        return None
    # end takeAt

    def setGeometry(self, rect):
        """Set the main geometry and the item geometry."""
        super().setGeometry(rect)

        for item in self.items:
            item.setGeometry(rect)
    # end setGeometry
# end class OverlayCenter


class Overlay(QtGui.QBoxLayout):
    """Overlay widgets on a parent widget."""

    def __init__(self, location="left", parent=None):
        super().__init__(QtGui.QBoxLayout.TopToBottom, parent)

        if location == "left":
            self.setDirection(QtGui.QBoxLayout.TopToBottom)
            self.setAlignment(QtCore.Qt.AlignLeft | QtCore.Qt.AlignVCenter)
        elif location == "right":
            self.setDirection(QtGui.QBoxLayout.TopToBottom)
            self.setAlignment(QtCore.Qt.AlignRight | QtCore.Qt.AlignVCenter)
        elif location == "top":
            self.setDirection(QtGui.QBoxLayout.LeftToRight)
            self.setAlignment(QtCore.Qt.AlignTop | QtCore.Qt.AlignHCenter)
        elif location == "bottom":
            self.setDirection(QtGui.QBoxLayout.LeftToRight)
            self.setAlignment(QtCore.Qt.AlignBottom | QtCore.Qt.AlignHCenter)


        self.css = "QWidget {background-color: lightskyblue; color: white}"
    # end Constructor

    def addWidget(self, widget):
        super().addWidget(widget)

        widget.setStyleSheet(self.css)
    # end addWidget
# end class Overlay

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

    window = QtGui.QMainWindow()
    window.show()

    widg = QtGui.QTreeView()
    window.setCentralWidget(widg)

    left = Overlay("left")
    lhlbl = QtGui.QLabel("Hello")
    lwlbl = QtGui.QLabel("World!")
    lhlbl.setSizePolicy(QtGui.QSizePolicy.Maximum, QtGui.QSizePolicy.Maximum)
    lwlbl.setSizePolicy(QtGui.QSizePolicy.Maximum, QtGui.QSizePolicy.Maximum)
    left.addWidget(lhlbl)
    left.addWidget(lwlbl)

    top = Overlay("top")
    lhlbl = QtGui.QLabel("HELLO")
    lwlbl = QtGui.QLabel("WORLD!")
    lhlbl.setSizePolicy(QtGui.QSizePolicy.Maximum, QtGui.QSizePolicy.Maximum)
    lwlbl.setSizePolicy(QtGui.QSizePolicy.Maximum, QtGui.QSizePolicy.Maximum)
    top.addWidget(lhlbl)
    top.addWidget(lwlbl)

    right = Overlay("right")
    lhlbl = QtGui.QLabel("hellO")
    lwlbl = QtGui.QLabel("worlD!")
    lhlbl.setSizePolicy(QtGui.QSizePolicy.Maximum, QtGui.QSizePolicy.Maximum)
    lwlbl.setSizePolicy(QtGui.QSizePolicy.Maximum, QtGui.QSizePolicy.Maximum)
    right.addWidget(lhlbl)
    right.addWidget(lwlbl)

    bottom = Overlay("bottom")
    lhlbl = QtGui.QLabel("hello")
    lwlbl = QtGui.QLabel("world!")
    lhlbl.setSizePolicy(QtGui.QSizePolicy.Maximum, QtGui.QSizePolicy.Maximum)
    lwlbl.setSizePolicy(QtGui.QSizePolicy.Maximum, QtGui.QSizePolicy.Maximum)
    bottom.addWidget(lhlbl)
    bottom.addWidget(lwlbl)

    center = OverlayCenter(widg)
    center.addLayout(left)
    center.addLayout(top)
    center.addLayout(right)
    center.addLayout(bottom)

    return app.exec_()
# end main

if __name__ == '__main__':
    sys.exit(main())

导入系统 从PySide导入QtGui、QtCore 类覆盖中心（QtGui.QLayout）： “”“用于管理覆盖的布局。”“” 定义初始化（自身，父级）： super（）。\uuuu init\uuuu（父级） #性质 self.setContentsMargins（0,0,0,0） self.items=[] #端构造函数 def添加布局（自身，布局）： “”“添加一个新布局以覆盖在其他布局和小部件之上。”“” self.addChildLayout（布局） 自添加项（布局） #末端添加布局 定义（自我）： “”“垃圾回收的析构函数。”“” item=self.takeAt（0） 而项目： item=self.takeAt（0） #端部析构函数 def附加项（自身，项目）： “”“将项目（小部件/布局）添加到列表。”“” self.items.append（项目） #结束附加项 def计数（自身）： “”“返回项目数。”“” 返回len（自我项目） #结束计数 def itemAt（自身，索引）： “”“返回给定索引处的项。”“” 如果索引>=0且索引=0且索引

import sys
from PySide import QtGui, QtCore


class OverlayCenter(QtGui.QLayout):
    """Layout for managing overlays."""

    def __init__(self, parent):
        super().__init__(parent)

        # Properties
        self.setContentsMargins(0, 0, 0, 0)

        self.items = []
    # end Constructor

    def addLayout(self, layout):
        """Add a new layout to overlay on top of the other layouts and widgets."""
        self.addChildLayout(layout)
        self.addItem(layout)
    # end addLayout

    def __del__(self):
        """Destructor for garbage collection."""
        item = self.takeAt(0)
        while item:
            item = self.takeAt(0)
    # end Destructor

    def addItem(self, item):
        """Add an item (widget/layout) to the list."""
        self.items.append(item)
    # end addItem

    def count(self):
        """Return the number of items."""
        return len(self.items)
    # end Count

    def itemAt(self, index):
        """Return the item at the given index."""
        if index >= 0 and index < len(self.items):
            return self.items[index]

        return None
    # end itemAt

    def takeAt(self, index):
        """Remove and return the item at the given index."""
        if index >= 0 and index < len(self.items):
            return self.items.pop(index)

        return None
    # end takeAt

    def setGeometry(self, rect):
        """Set the main geometry and the item geometry."""
        super().setGeometry(rect)

        for item in self.items:
            item.setGeometry(rect)
    # end setGeometry
# end class OverlayCenter


class Overlay(QtGui.QBoxLayout):
    """Overlay widgets on a parent widget."""

    def __init__(self, location="left", parent=None):
        super().__init__(QtGui.QBoxLayout.TopToBottom, parent)

        if location == "left":
            self.setDirection(QtGui.QBoxLayout.TopToBottom)
            self.setAlignment(QtCore.Qt.AlignLeft | QtCore.Qt.AlignVCenter)
        elif location == "right":
            self.setDirection(QtGui.QBoxLayout.TopToBottom)
            self.setAlignment(QtCore.Qt.AlignRight | QtCore.Qt.AlignVCenter)
        elif location == "top":
            self.setDirection(QtGui.QBoxLayout.LeftToRight)
            self.setAlignment(QtCore.Qt.AlignTop | QtCore.Qt.AlignHCenter)
        elif location == "bottom":
            self.setDirection(QtGui.QBoxLayout.LeftToRight)
            self.setAlignment(QtCore.Qt.AlignBottom | QtCore.Qt.AlignHCenter)


        self.css = "QWidget {background-color: lightskyblue; color: white}"
    # end Constructor

    def addWidget(self, widget):
        super().addWidget(widget)

        widget.setStyleSheet(self.css)
    # end addWidget
# end class Overlay

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

    window = QtGui.QMainWindow()
    window.show()

    widg = QtGui.QTreeView()
    window.setCentralWidget(widg)

    left = Overlay("left")
    lhlbl = QtGui.QLabel("Hello")
    lwlbl = QtGui.QLabel("World!")
    lhlbl.setSizePolicy(QtGui.QSizePolicy.Maximum, QtGui.QSizePolicy.Maximum)
    lwlbl.setSizePolicy(QtGui.QSizePolicy.Maximum, QtGui.QSizePolicy.Maximum)
    left.addWidget(lhlbl)
    left.addWidget(lwlbl)

    top = Overlay("top")
    lhlbl = QtGui.QLabel("HELLO")
    lwlbl = QtGui.QLabel("WORLD!")
    lhlbl.setSizePolicy(QtGui.QSizePolicy.Maximum, QtGui.QSizePolicy.Maximum)
    lwlbl.setSizePolicy(QtGui.QSizePolicy.Maximum, QtGui.QSizePolicy.Maximum)
    top.addWidget(lhlbl)
    top.addWidget(lwlbl)

    right = Overlay("right")
    lhlbl = QtGui.QLabel("hellO")
    lwlbl = QtGui.QLabel("worlD!")
    lhlbl.setSizePolicy(QtGui.QSizePolicy.Maximum, QtGui.QSizePolicy.Maximum)
    lwlbl.setSizePolicy(QtGui.QSizePolicy.Maximum, QtGui.QSizePolicy.Maximum)
    right.addWidget(lhlbl)
    right.addWidget(lwlbl)

    bottom = Overlay("bottom")
    lhlbl = QtGui.QLabel("hello")
    lwlbl = QtGui.QLabel("world!")
    lhlbl.setSizePolicy(QtGui.QSizePolicy.Maximum, QtGui.QSizePolicy.Maximum)
    lwlbl.setSizePolicy(QtGui.QSizePolicy.Maximum, QtGui.QSizePolicy.Maximum)
    bottom.addWidget(lhlbl)
    bottom.addWidget(lwlbl)

    center = OverlayCenter(widg)
    center.addLayout(left)
    center.addLayout(top)
    center.addLayout(right)
    center.addLayout(bottom)

    return app.exec_()
# end main

if __name__ == '__main__':
    sys.exit(main())