python - 如何根据 PyQt5 Python 中的窗口大小调整 PyQt5 堆叠小部件的大小？

Question

我正在设计一个uiin qt-desginer. 我必须创建一个 UI，它有一个带有按钮的侧面菜单栏，无论按下哪个按钮，其相应的数据都将显示在右侧。

为了设计这个，我在中央小部件上放了QFrame两个horizontal layout。QFrame我减少了命名左侧的宽度，side_menu_bar因此它已成为侧面菜单栏。QFrame在名为的右侧content_area，我放置了一个stackedWidget包含多个页面的。

现在我想显示的任何数据stackedWidget都必须覆盖整个区域，content_area因此我使用了vertical layouton stackedWidget。上page_2，stackedWidget我放了一个tablewidget。如果用户单击侧菜单栏，page_2则会显示此信息。pushButton

下面是UI文件的python代码：

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'home2.ui'
#
# Created by: PyQt5 UI code generator 5.15.0
#
# WARNING: Any manual changes made to this file will be lost when pyuic5 is
# run again.  Do not edit this file unless you know what you are doing.


from PyQt5 import QtCore, QtGui, QtWidgets


class Ui_home_window(object):
    def setupUi(self, home_window):
        home_window.setObjectName("home_window")
        home_window.resize(1216, 613)
        self.centralwidget = QtWidgets.QWidget(home_window)
        self.centralwidget.setObjectName("centralwidget")
        self.layoutWidget = QtWidgets.QWidget(self.centralwidget)
        self.layoutWidget.setGeometry(QtCore.QRect(2, 0, 1211, 611))
        self.layoutWidget.setObjectName("layoutWidget")
        self.horizontalLayout_2 = QtWidgets.QHBoxLayout(self.layoutWidget)
        self.horizontalLayout_2.setContentsMargins(0, 0, 0, 0)
        self.horizontalLayout_2.setObjectName("horizontalLayout_2")
        self.side_menu_bar = QtWidgets.QFrame(self.layoutWidget)
        self.side_menu_bar.setMinimumSize(QtCore.QSize(0, 0))
        self.side_menu_bar.setMaximumSize(QtCore.QSize(120, 16777215))
        self.side_menu_bar.setFrameShape(QtWidgets.QFrame.StyledPanel)
        self.side_menu_bar.setFrameShadow(QtWidgets.QFrame.Raised)
        self.side_menu_bar.setObjectName("side_menu_bar")
        self.pushButton = QtWidgets.QPushButton(self.side_menu_bar)
        self.pushButton.setGeometry(QtCore.QRect(20, 100, 75, 23))
        self.pushButton.setObjectName("pushButton")
        self.horizontalLayout_2.addWidget(self.side_menu_bar)
        self.content_area = QtWidgets.QFrame(self.layoutWidget)
        self.content_area.setStyleSheet("background-color: rgb(170, 255, 0);")
        self.content_area.setFrameShape(QtWidgets.QFrame.StyledPanel)
        self.content_area.setFrameShadow(QtWidgets.QFrame.Raised)
        self.content_area.setObjectName("content_area")
        self.verticalLayoutWidget = QtWidgets.QWidget(self.content_area)
        self.verticalLayoutWidget.setGeometry(QtCore.QRect(9, 9, 1071, 591))
        self.verticalLayoutWidget.setObjectName("verticalLayoutWidget")
        self.verticalLayout = QtWidgets.QVBoxLayout(self.verticalLayoutWidget)
        self.verticalLayout.setContentsMargins(0, 0, 0, 0)
        self.verticalLayout.setObjectName("verticalLayout")
        self.stackedWidget = QtWidgets.QStackedWidget(self.verticalLayoutWidget)
        self.stackedWidget.setObjectName("stackedWidget")
        self.page = QtWidgets.QWidget()
        self.page.setObjectName("page")
        self.stackedWidget.addWidget(self.page)
        self.page_2 = QtWidgets.QWidget()
        self.page_2.setObjectName("page_2")
        self.tableWidget = QtWidgets.QTableWidget(self.page_2)
        self.tableWidget.setGeometry(QtCore.QRect(0, 0, 1071, 591))
        self.tableWidget.setRowCount(50)
        self.tableWidget.setColumnCount(50)
        self.tableWidget.setObjectName("tableWidget")
        self.stackedWidget.addWidget(self.page_2)
        self.verticalLayout.addWidget(self.stackedWidget)
        self.horizontalLayout_2.addWidget(self.content_area)
        home_window.setCentralWidget(self.centralwidget)

        self.retranslateUi(home_window)
        QtCore.QMetaObject.connectSlotsByName(home_window)

    def retranslateUi(self, home_window):
        _translate = QtCore.QCoreApplication.translate
        home_window.setWindowTitle(_translate("home_window", "MainWindow"))
        self.pushButton.setText(_translate("home_window", "PushButton"))


if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    home_window = QtWidgets.QMainWindow()
    ui = Ui_home_window()
    ui.setupUi(home_window)
    home_window.show()
    sys.exit(app.exec_())

下面是我如何使用它app.py

import sys
from PyQt5.QtWidgets import QApplication, QMainWindow
from src.home2_ui import Ui_home_window


class HomeWindow(QMainWindow, Ui_home_window):
    def __init__(self):
        QMainWindow.__init__(self)
        self.home_ui = Ui_home_window()
        self.home_ui.setupUi(self)
        self.showMaximized()

        layout = self.home_ui.horizontalLayout_2
        self.home_ui.centralwidget.setLayout(layout)

        self.home_ui.pushButton.clicked.connect(self.show_page2)

    def show_page2(self):
        layout2 = self.home_ui.verticalLayout
        layout2.addWidget(self.home_ui.stackedWidget)
        self.home_ui.content_area.setLayout(layout2)


app = QApplication(sys.argv)
main_window = HomeWindow()
main_window.show()
sys.exit(app.exec_())

现在根据我的理解，我想全屏显示我的应用程序并希望适合窗口的整个区域。所以为此我附上horizontal layout了central widget：

layout = self.home_ui.horizontalLayout_2
self.home_ui.centralwidget.setLayout(layout)

现在为了使表格小部件覆盖堆叠小部件的完整区域，我在按钮按下事件中使用了以下代码：

layout2 = self.home_ui.verticalLayout
layout2.addWidget(self.home_ui.stackedWidget)
self.home_ui.content_area.setLayout(layout2)

根据我的理解，我们想要在堆叠小部件中显示的任何小部件都必须覆盖堆叠小部件的完整区域，因此我已将堆叠小部件附加到垂直布局，然后我将内容区域的布局设置为 layout2（这是垂直布局） . 现在通过这样做，如果我单击按钮以显示表格小部件，则不会显示任何内容：

在这里我有一个问题，当我单击按钮以显示表格小部件时，表格小部件未显示，而是显示了一个空白窗口，该窗口也覆盖了侧面菜单栏。？

如果我将上面的代码替换为：

layout2 = self.home_ui.verticalLayout
layout2.addWidget(self.home_ui.tableWidget)
self.home_ui.content_area.setLayout(layout2)

所以在这种情况下，我将表格小部件添加到垂直布局而不是堆叠小部件。下面是输出：

它确实显示表格，但仅在半屏上显示。它也删除了侧面菜单栏。

我无法完全理解使用layout时如何使用stacked widgets. 谁能指导我如何做到这一点。请帮忙。谢谢

这是下载文件的链接home2.ui

更新：

我终于能够解决这个问题。我使用了作为基本布局的水平布局，它有两个孩子content area和side menu bar. 两者content area都有side menu bar垂直布局。我可以根据side menu bar需要添加任意数量的内容，并且由于垂直布局，它将自动对齐。在content area我添加了堆叠的小部件，它又是垂直布局的孩子。在堆叠小部件的第 2 页中，我必须添加另一个垂直布局，然后添加表格小部件。现在它完美地显示出来。

以下是所有代码：

用户界面代码：

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'home5.ui'
#
# Created by: PyQt5 UI code generator 5.15.0
#
# WARNING: Any manual changes made to this file will be lost when pyuic5 is
# run again.  Do not edit this file unless you know what you are doing.


from PyQt5 import QtCore, QtGui, QtWidgets


class Ui_home_window(object):
    def setupUi(self, home_window):
        home_window.setObjectName("home_window")
        home_window.resize(1196, 573)
        self.centralwidget = QtWidgets.QWidget(home_window)
        self.centralwidget.setObjectName("centralwidget")
        self.widget = QtWidgets.QWidget(self.centralwidget)
        self.widget.setGeometry(QtCore.QRect(10, 10, 1181, 561))
        self.widget.setObjectName("widget")
        self.base_h_layout = QtWidgets.QHBoxLayout(self.widget)
        self.base_h_layout.setContentsMargins(0, 0, 0, 0)
        self.base_h_layout.setSpacing(0)
        self.base_h_layout.setObjectName("base_h_layout")
        self.side_menu_bar = QtWidgets.QFrame(self.widget)
        self.side_menu_bar.setMaximumSize(QtCore.QSize(120, 16777215))
        self.side_menu_bar.setFrameShape(QtWidgets.QFrame.StyledPanel)
        self.side_menu_bar.setFrameShadow(QtWidgets.QFrame.Raised)
        self.side_menu_bar.setObjectName("side_menu_bar")
        self.verticalLayout_2 = QtWidgets.QVBoxLayout(self.side_menu_bar)
        self.verticalLayout_2.setContentsMargins(0, 0, 0, 0)
        self.verticalLayout_2.setSpacing(0)
        self.verticalLayout_2.setObjectName("verticalLayout_2")
        self.menu_bar_v_layout = QtWidgets.QVBoxLayout()
        self.menu_bar_v_layout.setContentsMargins(10, 10, 10, 10)
        self.menu_bar_v_layout.setSpacing(10)
        self.menu_bar_v_layout.setObjectName("menu_bar_v_layout")
        self.pushButton = QtWidgets.QPushButton(self.side_menu_bar)
        self.pushButton.setObjectName("pushButton")
        self.menu_bar_v_layout.addWidget(self.pushButton)
        self.verticalLayout_2.addLayout(self.menu_bar_v_layout)
        self.base_h_layout.addWidget(self.side_menu_bar)
        self.content_area = QtWidgets.QFrame(self.widget)
        self.content_area.setFrameShape(QtWidgets.QFrame.StyledPanel)
        self.content_area.setFrameShadow(QtWidgets.QFrame.Raised)
        self.content_area.setObjectName("content_area")
        self.verticalLayout = QtWidgets.QVBoxLayout(self.content_area)
        self.verticalLayout.setContentsMargins(0, 0, 0, 0)
        self.verticalLayout.setSpacing(0)
        self.verticalLayout.setObjectName("verticalLayout")
        self.content_area_v_layout = QtWidgets.QVBoxLayout()
        self.content_area_v_layout.setSpacing(0)
        self.content_area_v_layout.setObjectName("content_area_v_layout")
        self.stackedWidget = QtWidgets.QStackedWidget(self.content_area)
        self.stackedWidget.setObjectName("stackedWidget")
        self.page = QtWidgets.QWidget()
        self.page.setObjectName("page")
        self.stackedWidget.addWidget(self.page)
        self.page_2 = QtWidgets.QWidget()
        self.page_2.setObjectName("page_2")
        self.verticalLayout_4 = QtWidgets.QVBoxLayout(self.page_2)
        self.verticalLayout_4.setObjectName("verticalLayout_4")
        self.table_v_layout = QtWidgets.QVBoxLayout()
        self.table_v_layout.setSpacing(0)
        self.table_v_layout.setObjectName("table_v_layout")
        self.tableWidget = QtWidgets.QTableWidget(self.page_2)
        self.tableWidget.setRowCount(50)
        self.tableWidget.setColumnCount(50)
        self.tableWidget.setObjectName("tableWidget")
        self.table_v_layout.addWidget(self.tableWidget)
        self.verticalLayout_4.addLayout(self.table_v_layout)
        self.stackedWidget.addWidget(self.page_2)
        self.content_area_v_layout.addWidget(self.stackedWidget)
        self.verticalLayout.addLayout(self.content_area_v_layout)
        self.base_h_layout.addWidget(self.content_area)
        home_window.setCentralWidget(self.centralwidget)

        self.retranslateUi(home_window)
        QtCore.QMetaObject.connectSlotsByName(home_window)

    def retranslateUi(self, home_window):
        _translate = QtCore.QCoreApplication.translate
        home_window.setWindowTitle(_translate("home_window", "MainWindow"))
        self.pushButton.setText(_translate("home_window", "PushButton"))


if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    home_window = QtWidgets.QMainWindow()
    ui = Ui_home_window()
    ui.setupUi(home_window)
    home_window.show()
    sys.exit(app.exec_())

应用程序.py：

class HomeWindow(QMainWindow, Ui_home_window):
    def __init__(self):
        QMainWindow.__init__(self)
        self.home_ui = Ui_home_window()
        self.home_ui.setupUi(self)
        self.showMaximized()

        base_layout = self.home_ui.base_h_layout
        self.home_ui.centralwidget.setLayout(base_layout)

        side_menu_v_layout = self.home_ui.menu_bar_v_layout
        self.home_ui.side_menu_bar.setLayout(side_menu_v_layout)

        content_v_layout = self.home_ui.content_area_v_layout
        self.home_ui.content_area.setLayout(content_v_layout)

        table_layout = self.home_ui.table_v_layout
        self.home_ui.page_2.setLayout(table_layout)

        self.home_ui.pushButton.clicked.connect(self.show_page2)

    def show_page2(self):
        self.home_ui.stackedWidget.setCurrentWidget(self.home_ui.page_2)

这就是qt-designer对象检查器的样子：

感谢@allec 和@musicamante。

Answer 1

side_menu_bar没有出现，因为它没有布局管理器来确定合适的大小。即使您将子按钮直接添加到框架，它也不会相应地调整大小，除非您明确告诉它。你有很多额外的占位符 QWidget，特别是layoutWidget, verticalLayoutWidget，page_2这使得这个设计变得比必要的复杂。任何类型的小部件都可以直接添加到布局或堆叠的小部件中。两个 QFrame 都应该有一个只包含子小部件的布局。

class Ui_home_window(object):
    def setupUi(self, home_window):
        home_window.setObjectName("home_window")
        home_window.resize(1216, 613)
        self.centralwidget = QtWidgets.QWidget(home_window)
        self.centralwidget.setObjectName("centralwidget")
        
        self.horizontalLayout_2 = QtWidgets.QHBoxLayout(self.centralwidget)
        self.horizontalLayout_2.setContentsMargins(0, 0, 0, 0)
        self.horizontalLayout_2.setObjectName("horizontalLayout_2")
        self.side_menu_bar = QtWidgets.QFrame()
        self.side_menu_bar.setMinimumSize(QtCore.QSize(0, 0))
        self.side_menu_bar.setMaximumSize(QtCore.QSize(120, 16777215))
        self.side_menu_bar.setFrameShape(QtWidgets.QFrame.StyledPanel)
        self.side_menu_bar.setFrameShadow(QtWidgets.QFrame.Raised)
        self.side_menu_bar.setObjectName("side_menu_bar")
        self.pushButton = QtWidgets.QPushButton(self.side_menu_bar)
        self.pushButton.setObjectName("pushButton")
        vbox = QtWidgets.QVBoxLayout(self.side_menu_bar)
        vbox.addWidget(self.pushButton)
        self.horizontalLayout_2.addWidget(self.side_menu_bar)
        
        self.content_area = QtWidgets.QFrame()
        self.content_area.setStyleSheet("background-color: rgb(170, 255, 0);")
        self.content_area.setFrameShape(QtWidgets.QFrame.StyledPanel)
        self.content_area.setFrameShadow(QtWidgets.QFrame.Raised)
        self.content_area.setObjectName("content_area")
        self.verticalLayout = QtWidgets.QVBoxLayout(self.content_area)
        self.verticalLayout.setContentsMargins(0, 0, 0, 0)
        self.verticalLayout.setObjectName("verticalLayout")
        self.stackedWidget = QtWidgets.QStackedWidget()
        self.stackedWidget.setObjectName("stackedWidget")
        self.page = QtWidgets.QWidget()
        self.page.setObjectName("page")
        self.stackedWidget.addWidget(self.page)
        self.tableWidget = QtWidgets.QTableWidget()
        self.tableWidget.setRowCount(50)
        self.tableWidget.setColumnCount(50)
        self.tableWidget.setObjectName("tableWidget")
        self.stackedWidget.addWidget(self.tableWidget)
        self.verticalLayout.addWidget(self.stackedWidget)
        self.horizontalLayout_2.addWidget(self.content_area)
        home_window.setCentralWidget(self.centralwidget)

        self.retranslateUi(home_window)
        QtCore.QMetaObject.connectSlotsByName(home_window)

    def retranslateUi(self, home_window):
        _translate = QtCore.QCoreApplication.translate
        home_window.setWindowTitle(_translate("home_window", "MainWindow"))
        self.pushButton.setText(_translate("home_window", "PushButton"))

中的小部件无需进一步设置布局HomeWindow，您可以使用 切换到其他页面QStackedWidget.setCurrentIndex()。

class HomeWindow(QMainWindow, Ui_home_window):
    def __init__(self):
        QMainWindow.__init__(self)
        self.home_ui = Ui_home_window()
        self.home_ui.setupUi(self)
        self.showMaximized()

        self.home_ui.pushButton.clicked.connect(self.show_page2)

    def show_page2(self):
        self.home_ui.stackedWidget.setCurrentIndex(1)

按下按钮前：

按下按钮后：