关闭一个 main window 并打开另一个（传递一个 arg）

Question

基本上我有一个启动器类型的交易，用于在最新版本 python 中使用 pyside2 / pyqt 的应用程序。在启动器中按下按钮后，我希望它关闭当前的 window class 并打开下一个 window（它有自己的 class）。在执行此操作时，我希望它将文件名传递给新的 window（基本上，告诉它要打开哪个文件）。这是我正在努力的部分。以下代码片段是我目前所拥有的代码片段，我认为这对更好地帮助解释问题很重要！

class launcherWidget( QMainWindow ) :
    def __init__(self) :
        #header
        QMainWindow.__init__(self)
        self.setWindowTitle("Scouting Software Launcher")

        #main central table
        self.table = QTableWidget(self)
        self.table.setColumnCount(3)
        self.table.setHorizontalHeaderLabels(["Save Name", "Mod Date","Creation Date"])
        self.table.horizontalHeader().setSectionResizeMode(QHeaderView.Stretch)
        self.table.setSelectionBehavior(QAbstractItemView.SelectRows)
        self.table.verticalHeader().setVisible(False)
        self.fill_table_with_list( listOfSavesLists )
        self.table.resize(470,165)
        self.table.move(15,50)


        self.b4 = QPushButton("Open",self)
        self.b4.clicked.connect(self.openSelected) #wip
        self.b4.resize(70,25)
        self.b4.move(340,225) 

        self.b5 = QPushButton("View",self)
        self.b5.clicked.connect(self.viewSelected) #wip
        self.b5.resize(70,25)
        self.b5.move(420,225)

    def viewSelected ( self ) :
        print("placeholder") #THIS POINT TO CALL NEXT FUNCTION (I want to send a string)

    def openSelected ( self ) :
        print("placeholder")

    @Slot()
    def exit_app(self, checked):
        QApplication.quit()

    class viewWindow( QMainWindow ) :
    def __init__( self , savename ) : #STRING TRANSFERED = savename
        #header
        QMainWindow.__init__(self)
        self.setWindowTitle("Scouting Software Viewer")
        self.openSaveName = str(savename) #deal with arg

    @Slot()
    def exit_app(self, checked) : #on exit, shutdown properly
        QApplication.quit() 

    def onLaunch () :
        app = QApplication(sys.argv)
        window = launcherWidget() 
        window.resize(500,300)
        window.show()
        sys.exit(app.exec_())

Answer 1

您可以创建一个带有字符串参数的信号，它会在您的主程序 window 结束时发出，或者在发出信号然后关闭 window 的方法中发出（这是我最有可能选择自己的方式）。

至于将该信号连接到哪个插槽，这取决于您，您可以拥有一个全局级别的函数，或者子类化 QApplication 并在那里添加一个方法，或者我相信还有其他方法。

from PySide2 import QtWidgets, QtCore
import sys


class launcherWidget(QtWidgets.QMainWindow):

    launch_signal = QtCore.Signal(str)

    def __init__(self):
        # header
        QtWidgets.QMainWindow.__init__(self)
        self.setWindowTitle("Scouting Software Launcher")

        # main central table
        self.table = QtWidgets.QTableWidget(self)
        self.table.setColumnCount(3)
        self.table.setHorizontalHeaderLabels(["Save Name", "Mod Date", "Creation Date"])
        self.table.horizontalHeader().setSectionResizeMode(QtWidgets.QHeaderView.Stretch)
        self.table.setSelectionBehavior(QtWidgets.QAbstractItemView.SelectRows)
        self.table.verticalHeader().setVisible(False)
        self.table.setRowCount(1)
        item = QtWidgets.QTableWidgetItem("Placeholder")
        self.table.setItem(0, 0, item)
        self.table.resize(470, 165)
        self.table.move(15, 50)

        self.b4 = QtWidgets.QPushButton("Open", self)
        self.b4.clicked.connect(self.openSelected)  # wip
        self.b4.resize(70, 25)
        self.b4.move(340, 225)

        self.b5 = QtWidgets.QPushButton("View", self)
        self.b5.clicked.connect(self.viewSelected)  # wip
        self.b5.resize(70, 25)
        self.b5.move(420, 225)

    def viewSelected(self):
        self.launch_signal.emit('Placeholder')
        self.close()

    def openSelected(self):
        print("placeholder")

    def exit_app(self, checked):
        QtWidgets.QApplication.quit()


class viewWindow(QtWidgets.QMainWindow):
    def __init__(self, savename):  # STRING TRANSFERED = savename
        # header
        QtWidgets.QMainWindow.__init__(self)
        self.setWindowTitle("Scouting Software Viewer")
        self.openSaveName = str(savename)  # deal with arg
        label = QtWidgets.QLabel(self.openSaveName)
        self.setCentralWidget(label)

    def exit_app(self, checked):  # on exit, shutdown properly
        QtWidgets.QApplication.quit()


def start_view_window(argument):
    global view  # Using a global now to avoid garbage collection, but other ways would be better
    view = viewWindow(argument)
    view.show()


def onLaunch():
    app = QtWidgets.QApplication(sys.argv)
    window = launcherWidget()
    window.resize(500, 300)
    window.launch_signal.connect(start_view_window)
    window.show()
    sys.exit(app.exec_())

onLaunch()

关闭一个 main window 并打开另一个（传递一个 arg）

Close one main window and open another one (with passing an arg)

python

pyqt

pyside2