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我正在使用 QTabWidget 进行一些后处理。最初，选项卡的内容是打开 txt 文件的按钮。单击此按钮后，选项卡的内容会发生变化，并且会根据 txt 文件中的数据进行绘图。此外，还有一个关闭绘图的按钮。

使用QStackedWidget，“openFileWidget”是一个CentralWidget，打开txt文件后被“newWindow”小部件代替。如果我关闭“newWindow”小部件，我会返回（空）选项卡。如果我想让“openFileWidget”重新出现，最好的方法是什么？由于 newWindow 已关闭，还需要使用takeAt吗？

import os, sys
from PySide import QtCore, QtGui

class MainStartTabWindow(QtGui.QWidget):
    def __init__(self, parent=None):
        super(MainStartTabWindow, self).__init__(parent)
        tabWidget = QtGui.QTabWidget()
        tabWidget.addTab(tab1Tab(), self.tr("tab 1"))

        mainLayout = QtGui.QVBoxLayout()
        mainLayout.addWidget(tabWidget)
        self.setLayout(mainLayout)


class tab1Tab(QtGui.QMainWindow):
    def __init__(self, parent=None):
        super(tab1Tab, self).__init__(parent)
        self.initTab1Content()

    def initTab1Content(self):
        self.centralOpenFile = QtGui.QStackedWidget()
        self.setCentralWidget(self.centralOpenFile)
        widgetOpenFile = openFileWidget(self)
        widgetOpenFile.openFileButton.clicked.connect(self.setOpenFile)
        widgetOpenFile.openFileButton.clicked.connect(self.FileOpened)
        self.centralOpenFile.addWidget(widgetOpenFile)

    def FileOpened(self):
        FileOpened_widget = newWindow(self.path)
        self.centralOpenFile.addWidget(FileOpened_widget)
        self.centralOpenFile.setCurrentWidget(FileOpened_widget)

    def setOpenFile(self):
        options = QtGui.QFileDialog.Options()
        fileChoice = "txt (*.txt)"
        self.path, filtr = QtGui.QFileDialog.getOpenFileName(self, "Open file", "", fileChoice, "", options)

        return self.path


class openFileWidget(QtGui.QWidget):
    def __init__(self, parent=None):
        super(openFileWidget, self).__init__(parent)

        self.openFileButton = QtGui.QPushButton("click to open")
        self.openFileButton.setFixedSize(150,150)
        layoutNoFileYet = QtGui.QGridLayout()
        layoutNoFileYet.addWidget(self.openFileButton, 1, 1)
        self.setLayout(layoutNoFileYet)


class newWindow(QtGui.QMainWindow):
    def __init__(self, PathToPlanFile, parent=None):
        super(newWindow, self).__init__(parent)
        self.createFrameUI()

    def createFrameUI(self):
        self.frameUI = QtGui.QWidget()
        self.buttonClose = QtGui.QPushButton("close")
        self.buttonClose.clicked.connect(self.close)

        self.label = QtGui.QLabel("plot based on openend file")

        layoutFileLoaded = QtGui.QGridLayout()
        layoutFileLoaded.addWidget(self.buttonClose, 1, 1)
        layoutFileLoaded.addWidget(self.label, 2, 1)

        self.frameUI.setLayout(layoutFileLoaded)
        self.setCentralWidget(self.frameUI)


def main():
    app = QtGui.QApplication(sys.argv)
    testPlot = MainStartTabWindow()
    testPlot.show()
    sys.exit(app.exec_())




if __name__ == "__main__":
    main()
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1 回答 1

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我会完全改变你的方法。你只需要一个 QMainWindow。不需要 openFileWidget；它只是一个按钮。接下来我要做的就是创建一个自定义 QTabWidget，编辑 addTab 以打开一个文件。

import os, sys
from PySide import QtCore, QtGui

class MainWindow(QtGui.QMainWindow):
    def __init__(self, parent=None):
        super().__init__(parent)

        self.main_widget = QtGui.QTabWidget()
        self.setCentralWidget(self.main_widget)

        self.main_widget.addTab(Page1(), "Tab 1")
        self.main_widget.addTab(Page2(), "Tab 2")
        self.main_widget.addTab(Page3(), "Tab 3")
        self.main_widget.addTab(Page4(), "Tab 4")

        self.main_widget.setCurrentIndex(0)
    # end Constructor
# end MainWindow

class Page1(QtGui.QWidget):
    """First page to display."""

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

        self.main_layout = QtGui.QVBoxLayout()
        self.setLayout(self.main_layout)

        # Widgets
        self.hlayout = QtGui.QHBoxLayout()
        self.hlayout.setContentsMargins(0, 0, 0, 0)
        self.read_btn = QtGui.QPushButton("Open File")
        self.clear_btn = QtGui.QPushButton("Clear Data")

        self.hlayout.addWidget(self.read_btn)
        self.hlayout.addWidget(self.clear_btn)

        # Display data here
        self.display = DisplayWidget("plot based on openend file")

        # Properties
        self.data = None

        # Signals
        self.read_btn.clicked.connect(self.read_file)
        self.clear_btn.clicked.connect(self.display.clearData)

        # Layout
        self.main_layout.addLayout(self.hlayout)
        self.main_layout.addWidget(self.display)
    # end Constructor

    def read_file(self, path=""):
        """Read file dialog."""
        if path == "":
            options = QtGui.QFileDialog.Options()
            fileChoice = "txt (*.txt)"
            path, _ = QtGui.QFileDialog.getOpenFileName(self, "Open file", "",
                                                             fileChoice, "", options)

        # Cancel button was pressed
        if path == "":
            return


        with open(path, "r") as file:
            lines = file.readlines()
        # close file

        self.display.setData(lines)
    # end read_file

    def set_data(self, data=None):
        """Set the data to display here."""

    # end set_data
# end class Page1

class DisplayWidget(QtGui.QWidget):
    def __init__(self, text=""):
        super().__init__()

        # Layout
        self.main_layout = QtGui.QVBoxLayout()
        self.setLayout(self.main_layout)

        # Widgets Have all of your display stuff here
        self.label = QtGui.QLabel(text)

        # Properties
        self.data = None

        # Add Layout
        self.main_layout.addWidget(self.label)
    # end Constructor

    def setData(self, data):
        """Set the data to show the plot."""
        self.data = data

        # Plot stuff here
        self.label.setText(str(data))
    # end setValue

    def clearData(self):
        """Clear the plot data."""
        self.data = None

        # Clear data here
        self.label.setText("Open a file to display data")
    # end clearData
# end class DisplayWidget

class Page2(QtGui.QWidget): 
    pass
# end class Page2

class Page3(QtGui.QWidget):
    pass
# end class Page3

class Page4(QtGui.QWidget):
    pass
# end class Page4


def main():
    app = QtGui.QApplication(sys.argv)
    testPlot = MainWindow()
    testPlot.show()
    sys.exit(app.exec_())




if __name__ == "__main__":
    main()

我不会让用户关闭选项卡。如果他们愿意，只需让他们能够清除和重新加载数据。如果您真的希望它们关闭，那么让清除数据按钮关闭显示小部件并让读取文件按钮每次都创建一个新小部件。我认为您不需要每次都创建一个新的小部件。如果您不喜欢这些选项卡，您可能需要查看 QToolBox。

于 2014-06-06T12:25:11.337 回答