使用PyQt中的按钮在另一个窗口中打开文本文件

Question

这里我有两个python代码，第一个是mainwindow.py：

from PyQt4 import QtCore, QtGui

try:
  _fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
  _fromUtf8 = lambda s: s

class Ui_MainWindow(object):
  def setupUi(self, MainWindow):
    MainWindow.setObjectName(_fromUtf8("MainWindow"))
    MainWindow.resize(559, 207)
    self.centralWidget = QtGui.QWidget(MainWindow)
    self.centralWidget.setObjectName(_fromUtf8("centralWidget"))
    self.label = QtGui.QLabel(self.centralWidget)
    self.label.setGeometry(QtCore.QRect(20, 40, 111, 17))
    self.label.setObjectName(_fromUtf8("label"))
    self.lineEdit = QtGui.QLineEdit(self.centralWidget)
    self.lineEdit.setGeometry(QtCore.QRect(130, 40, 411, 25))
    self.lineEdit.setObjectName(_fromUtf8("lineEdit"))
    self.pushButton = QtGui.QPushButton(self.centralWidget)
    self.pushButton.setGeometry(QtCore.QRect(200, 90, 151, 27))
    self.pushButton.setObjectName(_fromUtf8("pushButton"))
    MainWindow.setCentralWidget(self.centralWidget)
    self.menuBar = QtGui.QMenuBar(MainWindow)
    self.menuBar.setGeometry(QtCore.QRect(0, 0, 559, 23))
    self.menuBar.setObjectName(_fromUtf8("menuBar"))
    MainWindow.setMenuBar(self.menuBar)
    self.mainToolBar = QtGui.QToolBar(MainWindow)
    self.mainToolBar.setObjectName(_fromUtf8("mainToolBar"))
    MainWindow.addToolBar(QtCore.Qt.TopToolBarArea, self.mainToolBar)
    self.statusBar = QtGui.QStatusBar(MainWindow)
    self.statusBar.setObjectName(_fromUtf8("statusBar"))
    MainWindow.setStatusBar(self.statusBar)

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

  def retranslateUi(self, MainWindow):
    MainWindow.setWindowTitle(QtGui.QApplication.translate("MainWindow", "MainWindow", None, QtGui.QApplication.UnicodeUTF8))
    self.label.setText(QtGui.QApplication.translate("MainWindow", "Enter the path :", None, QtGui.QApplication.UnicodeUTF8))
    self.lineEdit.setText(QtGui.QApplication.translate("MainWindow", "Path of the text file...", None, QtGui.QApplication.UnicodeUTF8))
    self.pushButton.setText(QtGui.QApplication.translate("MainWindow", "Open Text File", None, QtGui.QApplication.UnicodeUTF8))


if __name__ == "__main__":
  import sys
  app = QtGui.QApplication(sys.argv)
  MainWindow = QtGui.QMainWindow()
  ui = Ui_MainWindow()
  ui.setupUi(MainWindow)
  MainWindow.show()
  sys.exit(app.exec_())

我的另一个包含textEdit的窗口是textfile.py：

from PyQt4 import QtCore, QtGui

try:
  _fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
  _fromUtf8 = lambda s: s

class Ui_TextFile(object):
  def setupUi(self, TextFile):
    TextFile.setObjectName(_fromUtf8("TextFile"))
    TextFile.resize(683, 531)
    self.scrollArea = QtGui.QScrollArea(TextFile)
    self.scrollArea.setGeometry(QtCore.QRect(10, 50, 661, 471))
    self.scrollArea.setWidgetResizable(True)
    self.scrollArea.setObjectName(_fromUtf8("scrollArea"))
    self.scrollAreaWidgetContents = QtGui.QWidget()
    self.scrollAreaWidgetContents.setGeometry(QtCore.QRect(0, 0, 657, 467))
    self.scrollAreaWidgetContents.setObjectName(_fromUtf8("scrollAreaWidgetContents"))
    self.textEdit = QtGui.QTextEdit(self.scrollAreaWidgetContents)
    self.textEdit.setGeometry(QtCore.QRect(0, 0, 661, 461))
    self.textEdit.setObjectName(_fromUtf8("textEdit"))
    self.scrollArea.setWidget(self.scrollAreaWidgetContents)
    self.label = QtGui.QLabel(TextFile)
    self.label.setGeometry(QtCore.QRect(280, 20, 67, 17))
    self.label.setObjectName(_fromUtf8("label"))

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

  def retranslateUi(self, TextFile):
    TextFile.setWindowTitle(QtGui.QApplication.translate("TextFile", "Form", None, QtGui.QApplication.UnicodeUTF8))
    self.label.setText(QtGui.QApplication.translate("TextFile", "Text File", None, QtGui.QApplication.UnicodeUTF8))


if __name__ == "__main__":
  import sys
  app = QtGui.QApplication(sys.argv)
  TextFile = QtGui.QWidget()
  ui = Ui_TextFile()
  ui.setupUi(TextFile)
  TextFile.show()
  sys.exit(app.exec_())

这里我的想法是当从主窗口点击按钮时将文本文件打开为新窗口。我的主窗口包含linEdit和pushbutton中的文件路径。单击按钮后，它应该在另一个包含textEdit的窗口中显示文本文件的内容。 请建议代码中的正确更改。

Answer 1

非常简单，只需在mainWindow类中创建一个connect语句和一个函数。

from PyQt4 import QtCore, QtGui

try:
  _fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
  _fromUtf8 = lambda s: s
class Ui_TextFile(object):
  def setupUi(self, TextFile,file):
    self.text= open(file,"r").read()

    TextFile.setObjectName(_fromUtf8("TextFile"))
    TextFile.resize(683, 531)
    self.scrollArea = QtGui.QScrollArea(TextFile)
    self.scrollArea.setGeometry(QtCore.QRect(10, 50, 661, 471))
    self.scrollArea.setWidgetResizable(True)
    self.scrollArea.setObjectName(_fromUtf8("scrollArea"))
    self.scrollAreaWidgetContents = QtGui.QWidget()
    self.scrollAreaWidgetContents.setGeometry(QtCore.QRect(0, 0, 657, 467))
    self.scrollAreaWidgetContents.setObjectName(_fromUtf8("scrollAreaWidgetContents"))
    self.textEdit = QtGui.QTextEdit(self.scrollAreaWidgetContents)
    self.textEdit.setGeometry(QtCore.QRect(0, 0, 661, 461))
    self.textEdit.setObjectName(_fromUtf8("textEdit"))
    self.textEdit.setText(self.text)
    self.scrollArea.setWidget(self.scrollAreaWidgetContents)
    self.label = QtGui.QLabel(TextFile)
    self.label.setGeometry(QtCore.QRect(280, 20, 67, 17))
    self.label.setObjectName(_fromUtf8("label"))

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

  def retranslateUi(self, TextFile):
    TextFile.setWindowTitle(QtGui.QApplication.translate("TextFile", "Form", None, QtGui.QApplication.UnicodeUTF8))
    self.label.setText(QtGui.QApplication.translate("TextFile", "Text File", None, QtGui.QApplication.UnicodeUTF8))


class Ui_MainWindow(object):
  def setupUi(self, MainWindow):
    MainWindow.setObjectName(_fromUtf8("MainWindow"))
    MainWindow.resize(559, 207)
    self.centralWidget = QtGui.QWidget(MainWindow)
    self.centralWidget.setObjectName(_fromUtf8("centralWidget"))
    self.label = QtGui.QLabel(self.centralWidget)
    self.label.setGeometry(QtCore.QRect(20, 40, 111, 17))
    self.label.setObjectName(_fromUtf8("label"))
    self.lineEdit = QtGui.QLineEdit(self.centralWidget)
    self.lineEdit.setGeometry(QtCore.QRect(130, 40, 411, 25))
    self.lineEdit.setObjectName(_fromUtf8("lineEdit"))
    self.pushButton = QtGui.QPushButton(self.centralWidget)
    self.pushButton.setGeometry(QtCore.QRect(200, 90, 151, 27))
    self.pushButton.setObjectName(_fromUtf8("pushButton"))
    MainWindow.setCentralWidget(self.centralWidget)
    self.menuBar = QtGui.QMenuBar(MainWindow)
    self.menuBar.setGeometry(QtCore.QRect(0, 0, 559, 23))
    self.menuBar.setObjectName(_fromUtf8("menuBar"))
    MainWindow.setMenuBar(self.menuBar)
    self.mainToolBar = QtGui.QToolBar(MainWindow)
    self.mainToolBar.setObjectName(_fromUtf8("mainToolBar"))
    MainWindow.addToolBar(QtCore.Qt.TopToolBarArea, self.mainToolBar)
    self.statusBar = QtGui.QStatusBar(MainWindow)
    self.statusBar.setObjectName(_fromUtf8("statusBar"))
    MainWindow.setStatusBar(self.statusBar)

    self.retranslateUi(MainWindow)
    QtCore.QObject.connect(self.pushButton , QtCore.SIGNAL("clicked()") , self.OpenIT)
    QtCore.QMetaObject.connectSlotsByName(MainWindow)

  def retranslateUi(self, MainWindow):
    MainWindow.setWindowTitle(QtGui.QApplication.translate("MainWindow", "MainWindow", None, QtGui.QApplication.UnicodeUTF8))
    self.label.setText(QtGui.QApplication.translate("MainWindow", "Enter the path :", None, QtGui.QApplication.UnicodeUTF8))
    self.lineEdit.setText(QtGui.QApplication.translate("MainWindow", "Path of the text file...", None, QtGui.QApplication.UnicodeUTF8))
    self.pushButton.setText(QtGui.QApplication.translate("MainWindow", "Open Text File", None, QtGui.QApplication.UnicodeUTF8))

    def OpenIT(self):
        TextFile = QtGui.QDialog()
        ui = Ui_TextFile()
        ui.setupUi(TextFile,file=str(self.lineEdit.text()))
        TextFile.exec_()

if __name__ == "__main__":
  import sys
  app = QtGui.QApplication(sys.argv)
  MainWindow = QtGui.QMainWindow()
  ui = Ui_MainWindow()
  ui.setupUi(MainWindow)
  MainWindow.show()
  sys.exit(app.exec_())