python3+PyQt5实现窗口切分条

本文是对《Python Qt GUI快速编程》的第9章的窗口切分条例子News Reader 用Python3+PyQt5进行改写。
注：import qrc_resources，资源文件resources.qrc如下：

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<!DOCTYPE RCC><RCC version="1.0"><qresource><file alias="icon.png">images/icon.png</file><file alias="filenew.png">images/filenew.png</file><file alias="fileopen.png">images/fileopen.png</file><file alias="filesave.png">images/filesave.png</file><file alias="filesaveas.png">images/filesaveas.png</file><file alias="fileclose.png">images/filequit.png</file><file alias="filequit.png">images/filequit.png</file><file alias="editcut.png">images/editcut.png</file><file alias="editcopy.png">images/editcopy.png</file><file alias="editpaste.png">images/editpaste.png</file><file alias="editadd.png">images/editadd.png</file><file alias="editedit.png">images/editedit.png</file><file alias="editdelete.png">images/editdelete.png</file></qresource></RCC>

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sudo pyrcc5 -o qrc_resources.py resources.qrc 生成qrc_resources.py

import sysfrom PyQt5.QtCore import (QSettings, Qt,QByteArray)from PyQt5.QtWidgets import (QAction, QApplication, QListWidget,        QMainWindow, QSplitter, QTextBrowser)from PyQt5.QtGui import QIconimport qrc_resources__version__ = "1.0.0"class MainWindow(QMainWindow):    def __init__(self, parent=None):        super(MainWindow, self).__init__(parent)        self.groupsList = QListWidget()        self.messagesList = QListWidget()        self.messageView = QTextBrowser()        self.messageSplitter = QSplitter(Qt.Vertical)        self.messageSplitter.addWidget(self.messagesList)        self.messageSplitter.addWidget(self.messageView)        self.mainSplitter = QSplitter(Qt.Horizontal)        self.mainSplitter.addWidget(self.groupsList)        self.mainSplitter.addWidget(self.messageSplitter)        self.setCentralWidget(self.mainSplitter)        self.mainSplitter.setStretchFactor(0, 1)        self.mainSplitter.setStretchFactor(1, 3)        self.messageSplitter.setStretchFactor(0, 1)        self.messageSplitter.setStretchFactor(1, 2)        self.createMenusAndToolbars()        settings = QSettings()        if settings.value("MainWindow/Geometry") or \                      settings.value("MainWindow/State") or \                      settings.value("MainSplitter"):            self.restoreGeometry(                    QByteArray(settings.value("MainWindow/Geometry")))            self.restoreState(                    QByteArray(settings.value("MainWindow/State")))            self.messageSplitter.restoreState(                    QByteArray(settings.value("MessageSplitter")))            self.mainSplitter.restoreState(                    QByteArray(settings.value("MainSplitter")))        status = self.statusBar()        status.setSizeGripEnabled(False)        status.showMessage("Ready", 5000)        self.setWindowTitle("News Reader")        self.generateFakeData()    def createMenusAndToolbars(self):        fileMenu = self.menuBar().addMenu("&File")        fileToolbar = self.addToolBar("File")        fileToolbar.setObjectName("FileToolbar")        for icon, text in (("new", "&New..."), ("open", "&Open..."),                ("save", "&Save"), ("save", "Save &As..."),                (None, None), ("quit", "&Quit")):            if icon is None:                fileMenu.addSeparator()            else:                action = QAction(QIcon(":/file{0}.png".format(icon)),                                 text, self)                if icon == "quit":                    action.triggered.connect(self.close)                elif text != "Save &As...":                    fileToolbar.addAction(action)                fileMenu.addAction(action)        editMenu = self.menuBar().addMenu("&Edit")        editToolbar = self.addToolBar("Edit")        editToolbar.setObjectName("EditToolbar")        for icon, text in (("add", "&Add..."), ("edit", "&Edit..."),                           ("delete", "&Remove")):            action = QAction(QIcon(":/edit{0}.png".format(icon)),                             text, self)            editToolbar.addAction(action)            editMenu.addAction(action)    def closeEvent(self, event):        if self.okToContinue():            settings = QSettings()            settings.setValue("MainWindow/Geometry",                              self.saveGeometry())            settings.setValue("MainWindow/State",                              self.saveState())            settings.setValue("MessageSplitter",                    self.messageSplitter.saveState())            settings.setValue("MainSplitter",                    self.mainSplitter.saveState())        else:            event.ignore()    def okToContinue(self):        return True    def generateFakeData(self):        for group in ("ada", "apl", "asm.*", "asm370", "awk", "basic.*",                "beta", "c.*", "c++.*", "clarion", "clipper.*", "clos",                "clu", "cobol", "dylan", "eiffel", "forth.*",                "fortran.*", "functional", "haskell", "hermes", "icon",                "idl", "idl-pvwave", "java.*", "javascript", "labview",                "limbo", "lisp.*", "logo", "misc", "ml.*", "modula2",                "modula3", "mumps", "oberon", "objective-c", "pascal.*",                "perl.*", "php.*", "pl1", "pop", "postscript",                "prograph", "prolog", "python.*", "rexx.*", "ruby",                "sathe", "scheme.*", "sigplan", "smalltalk.*", "tcl.*",                "verilog", "vhdl", "visual.*", "vrml"):            self.groupsList.addItem("comp.lang.{0}".format(group))        for topic, author in (                ("ANN: Einf\u00FChrung in die Programmierung mit Python",                 "Ian Ozsvald",),                ("SQLObject 0.7.3", "Oleg Broytmann",),                ("ANN: Pyrex 0.9.5.1", "greg",),                ("ANN: gozerbot IRC and JABBER bot", "bthate",),                ("Extended deadline: CfP IEEE Software Special Issue on "                 "Rapid Application Development with Dynamically Typed "                 "Languages", "Laurence Tratt",),                ("ANN: New python software community website in Chinese, "                 "PythonNet.com", "Wenshan Du",),                ("ANN: Plex 1.1.5 (Repost)", "greg",),                ("ANN: Pyrex 0.9.5", "greg",),                ("ftputil 2.2.1", "Stefan Schwarzer",),                ("FlightFeather Social Networking Platform 0.3.1",                 "George Belotsky",),                ("OSCON 2007 Call for Participation Ends Soon",                 "Kevin Altis",),                ("ANN: tl.googlepagerank", "Thomas Lotze",),                ("Dejavu 1.5.0RC1", "Robert Brewer",),                ("PyCon: one week left for hotel registration",                 "A.M. Kuchling",),                ("FlightFeather Social Networking Platform 0.3.0",                "George Belotsky",),                ("SQLObject 0.8.0b2", "Oleg Broytmann",),                ("SQLObject 0.7.3b1", "Oleg Broytmann",),                ("ANN: Updated TkTreectrl wrapper module", "klappnase",),                ("PyPy Trillke Sprints Feb/March 2007", "holger krekel",),                ("wxPython 2.8.1.1", "Robin Dunn",),                ("Movable Python 2.0.0 Final Available", "Fuzzyman",),                ("ANN: Phebe 0.1.1", "Thomas Lotze",),                ("Exception #03. Python seminar in Kiev city (Ukraine).",                 "Mkdir",),                ("FlightFeather Social Networking Platform 0.2.8",                "George Belotsky",),                ("ANN: Python Installation", "Ian Ozsvald",),                ("ANN: pyGame Basics", "Ian Ozsvald",),                ("PythonTidy 1.10", "Chuck Rhode",),                ("Shed Skin Optimizing Python-to-C++ Compiler 0.0.10",                 "Mark Dufour",),                ("ANN : Karrigell 2.3.3", "Pierre Quentel",),                ("ANN: amplee 0.4.0", "Sylvain Hellegouarch")):            self.messagesList.addItem("{0} from {1}".format(topic, author))        self.messageView.setHtml("""<table bgcolor=yellow><tr><td>Groups:</td><td>comp.lang.python.announce</td></tr><tr><td>From:</td><td>"Fuzzyman" &lt;[e-mail]&gt;</td></tr><tr><td>Subject:</td><td><b>[ANN] Movable Python 2.0.0 FinalAvailable</b></td></tr></table><h3>Movable Python 2.0.0 Final</h3><p><a href="http://www.voidspace.org.uk/python/movpy/">http://www.voidspace.org.uk/python/movpy/</a>is now available.<p>The new binaries are available for download from the groups page :<p>Movable Python Groups Page<a href="http://voidspace.tradebit.com/groups.php">http://voidspace.tradebit.com/groups.php</a><p>Binaries are uploaded for Python 2.2.3, 2.3.5, 2.4.4, 2.5 and theMegaPack<a href="http://www.voidspace.org.uk/python/movpy/megapack.html">http://www.voidspace.org.uk/python/movpy/megapack.html</a>.<p>There is also a fresh version of the free demo, based on Python 2.3.5:<p>Movable Python Trial Version<a href="http://voidspace.tradebit.com/files.php/7007">http://voidspace.tradebit.com/files.php/7007</a><h3>What is Movable Python</h3><p><b><i>Movable Python</i></b> is a distribution of Python, for Windows,that can run without being installed. It means you can carry a fulldevelopment environment round on a USB stick.<p>It is also useful for testing programs with a 'clean Python install',and testing programs with multiple versions of Python.<p>The GUI program launcher makes it a useful programmers tool, includingfeatures like :<ul><li>Log the output of all Python scripts run<li>Enable Psyco for all scripts<li>Quick Launch buttons for commonly used programs<li>Configure multiple interpreters for use from a single interface</ul><p>It comes with the Pythonwin IDE and works fine with other IDEs likeSPE<a href="http://developer.berlios.de/projects/python/">http://developer.berlios.de/projects/python/</a>.<p>Plus many other features and bundled libraries.""")if __name__ == "__main__":    app = QApplication(sys.argv)    app.setOrganizationName("Qtrac Ltd.")    app.setOrganizationDomain("qtrac.eu")    app.setApplicationName("News Reader")    form = MainWindow()    form.show()    app.exec_()

运行结果：