#!/usr/bin/env python"""PyQt4 port of the dialogs/standarddialogs example from Qt v4.x"""# This is only needed for Python v2 but is harmless for Python v3.#import sip#sip.setapi(‘QString‘, 2)import sysfrom PySide import QtCore, QtGuiclass Dialog(QtGui.QDialog):    MESSAGE = "<p>Message boxes have a caption, a text, and up to three "             "buttons, each with standard or custom texts.</p>"             "<p>Click a button to close the message box. Pressing the Esc "             "button will activate the detected escape button (if any).</p>"    def __init__(self, parent=None):        super(Dialog, self).__init__(parent)        self.openFilesPath = ‘‘        self.errorMessageDialog = QtGui.QErrorMessage(self)        frameStyle = QtGui.QFrame.Sunken | QtGui.QFrame.Panel        self.integerLabel = QtGui.QLabel()        self.integerLabel.setFrameStyle(frameStyle)        self.integerButton = QtGui.QPushButton("QInputDialog.get&Integer()")        self.doubleLabel = QtGui.QLabel()        self.doubleLabel.setFrameStyle(frameStyle)        self.doubleButton = QtGui.QPushButton("QInputDialog.get&Double()")        self.itemLabel = QtGui.QLabel()        self.itemLabel.setFrameStyle(frameStyle)        self.itemButton = QtGui.QPushButton("QInputDialog.getIte&m()")        self.textLabel = QtGui.QLabel()        self.textLabel.setFrameStyle(frameStyle)        self.textButton = QtGui.QPushButton("QInputDialog.get&Text()")        self.colorLabel = QtGui.QLabel()        self.colorLabel.setFrameStyle(frameStyle)        self.colorButton = QtGui.QPushButton("QColorDialog.get&Color()")        self.fontLabel = QtGui.QLabel()        self.fontLabel.setFrameStyle(frameStyle)        self.fontButton = QtGui.QPushButton("QFontDialog.get&Font()")        self.directoryLabel = QtGui.QLabel()        self.directoryLabel.setFrameStyle(frameStyle)        self.directoryButton = QtGui.QPushButton("QFileDialog.getE&xistingDirectory()")        self.openFileNameLabel = QtGui.QLabel()        self.openFileNameLabel.setFrameStyle(frameStyle)        self.openFileNameButton = QtGui.QPushButton("QFileDialog.get&OpenFileName()")        self.openFileNamesLabel = QtGui.QLabel()        self.openFileNamesLabel.setFrameStyle(frameStyle)        self.openFileNamesButton = QtGui.QPushButton("QFileDialog.&getOpenFileNames()")        self.saveFileNameLabel = QtGui.QLabel()        self.saveFileNameLabel.setFrameStyle(frameStyle)        self.saveFileNameButton = QtGui.QPushButton("QFileDialog.get&SaveFileName()")        self.criticalLabel = QtGui.QLabel()        self.criticalLabel.setFrameStyle(frameStyle)        self.criticalButton = QtGui.QPushButton("QMessageBox.critica&l()")        self.informationLabel = QtGui.QLabel()        self.informationLabel.setFrameStyle(frameStyle)        self.informationButton = QtGui.QPushButton("QMessageBox.i&nformation()")        self.questionLabel = QtGui.QLabel()        self.questionLabel.setFrameStyle(frameStyle)        self.questionButton = QtGui.QPushButton("QMessageBox.&question()")        self.warningLabel = QtGui.QLabel()        self.warningLabel.setFrameStyle(frameStyle)        self.warningButton = QtGui.QPushButton("QMessageBox.&warning()")        self.errorLabel = QtGui.QLabel()        self.errorLabel.setFrameStyle(frameStyle)        self.errorButton = QtGui.QPushButton("QErrorMessage.show&M&essage()")        self.integerButton.clicked.connect(self.setInteger)        self.doubleButton.clicked.connect(self.setDouble)        self.itemButton.clicked.connect(self.setItem)        self.textButton.clicked.connect(self.setText)        self.colorButton.clicked.connect(self.setColor)        self.fontButton.clicked.connect(self.setFont)        self.directoryButton.clicked.connect(self.setExistingDirectory)        self.openFileNameButton.clicked.connect(self.setOpenFileName)        self.openFileNamesButton.clicked.connect(self.setOpenFileNames)        self.saveFileNameButton.clicked.connect(self.setSaveFileName)        self.criticalButton.clicked.connect(self.criticalMessage)        self.informationButton.clicked.connect(self.informationMessage)        self.questionButton.clicked.connect(self.questionMessage)        self.warningButton.clicked.connect(self.warningMessage)        self.errorButton.clicked.connect(self.errorMessage)        self.native = QtGui.QCheckBox()        self.native.setText("Use native file dialog.")        self.native.setChecked(True)        if sys.platform not in ("win32", "darwin"):            self.native.hide()        layout = QtGui.QGridLayout()        layout.setColumnStretch(1, 1)        layout.setColumnMinimumWidth(1, 250)        layout.addWidget(self.integerButton, 0, 0)        layout.addWidget(self.integerLabel, 0, 1)        layout.addWidget(self.doubleButton, 1, 0)        layout.addWidget(self.doubleLabel, 1, 1)        layout.addWidget(self.itemButton, 2, 0)        layout.addWidget(self.itemLabel, 2, 1)        layout.addWidget(self.textButton, 3, 0)        layout.addWidget(self.textLabel, 3, 1)        layout.addWidget(self.colorButton, 4, 0)        layout.addWidget(self.colorLabel, 4, 1)        layout.addWidget(self.fontButton, 5, 0)        layout.addWidget(self.fontLabel, 5, 1)        layout.addWidget(self.directoryButton, 6, 0)        layout.addWidget(self.directoryLabel, 6, 1)        layout.addWidget(self.openFileNameButton, 7, 0)        layout.addWidget(self.openFileNameLabel, 7, 1)        layout.addWidget(self.openFileNamesButton, 8, 0)        layout.addWidget(self.openFileNamesLabel, 8, 1)        layout.addWidget(self.saveFileNameButton, 9, 0)        layout.addWidget(self.saveFileNameLabel, 9, 1)        layout.addWidget(self.criticalButton, 10, 0)        layout.addWidget(self.criticalLabel, 10, 1)        layout.addWidget(self.informationButton, 11, 0)        layout.addWidget(self.informationLabel, 11, 1)        layout.addWidget(self.questionButton, 12, 0)        layout.addWidget(self.questionLabel, 12, 1)        layout.addWidget(self.warningButton, 13, 0)        layout.addWidget(self.warningLabel, 13, 1)        layout.addWidget(self.errorButton, 14, 0)        layout.addWidget(self.errorLabel, 14, 1)        layout.addWidget(self.native, 15, 0)        self.setLayout(layout)        self.setWindowTitle("Standard Dialogs")    def setInteger(self):            i, ok = QtGui.QInputDialog.getInteger(self,                "QInputDialog.getInteger()", "Percentage:", 25, 0, 100, 1)        if ok:            self.integerLabel.setText("%d%%" % i)    def setDouble(self):            d, ok = QtGui.QInputDialog.getDouble(self, "QInputDialog.getDouble()",                "Amount:", 37.56, -10000, 10000, 2)                            #最后一位2指的是小数的位数        if ok:            self.doubleLabel.setText("$%g" % d)    def setItem(self):            items = ("Spring", "Summer", "Fall", "Winter")        item, ok = QtGui.QInputDialog.getItem(self, "QInputDialog.getItem()",                "Season:", items, 0, False)        if ok and item:            self.itemLabel.setText(item)    def setText(self):        text, ok = QtGui.QInputDialog.getText(self, "QInputDialog.getText()",                "User name:", QtGui.QLineEdit.Normal,                QtCore.QDir.home().dirName())        if ok and text != ‘‘:            self.textLabel.setText(text)    def setColor(self):            color = QtGui.QColorDialog.getColor(QtCore.Qt.green, self)        if color.isValid():             self.colorLabel.setText(color.name())            self.colorLabel.setPalette(QtGui.QPalette(color))            self.colorLabel.setAutoFillBackground(True)    def setFont(self):            font, ok = QtGui.QFontDialog.getFont(QtGui.QFont(self.fontLabel.text()), self)        if ok:            self.fontLabel.setText(font.key())            self.fontLabel.setFont(font)    def setExistingDirectory(self):            options = QtGui.QFileDialog.DontResolveSymlinks | QtGui.QFileDialog.ShowDirsOnly        directory = QtGui.QFileDialog.getExistingDirectory(self,                "QFileDialog.getExistingDirectory()",                self.directoryLabel.text(), options)        if directory:            self.directoryLabel.setText(directory)    def setOpenFileName(self):            options = QtGui.QFileDialog.Options()        if not self.native.isChecked():            options |= QtGui.QFileDialog.DontUseNativeDialog        fileName, filtr = QtGui.QFileDialog.getOpenFileName(self,                "QFileDialog.getOpenFileName()",                self.openFileNameLabel.text(),                "All Files (*);;Text Files (*.txt)", "", options)        if fileName:            self.openFileNameLabel.setText(fileName)    def setOpenFileNames(self):            options = QtGui.QFileDialog.Options()        if not self.native.isChecked():            options |= QtGui.QFileDialog.DontUseNativeDialog        files, filtr = QtGui.QFileDialog.getOpenFileNames(self,                "QFileDialog.getOpenFileNames()", self.openFilesPath,                "All Files (*);;Text Files (*.txt)", "", options)        if files:            self.openFilesPath = files[0]            self.openFileNamesLabel.setText("[%s]" % ‘, ‘.join(files))    def setSaveFileName(self):            options = QtGui.QFileDialog.Options()        if not self.native.isChecked():            options |= QtGui.QFileDialog.DontUseNativeDialog        fileName, filtr = QtGui.QFileDialog.getSaveFileName(self,                "QFileDialog.getSaveFileName()",                self.saveFileNameLabel.text(),                "All Files (*);;Text Files (*.txt)", "", options)        if fileName:            self.saveFileNameLabel.setText(fileName)    def criticalMessage(self):            reply = QtGui.QMessageBox.critical(self, "QMessageBox.critical()",                Dialog.MESSAGE,                QtGui.QMessageBox.Abort | QtGui.QMessageBox.Retry | QtGui.QMessageBox.Ignore)        if reply == QtGui.QMessageBox.Abort:            self.criticalLabel.setText("Abort")        elif reply == QtGui.QMessageBox.Retry:            self.criticalLabel.setText("Retry")        else:            self.criticalLabel.setText("Ignore")    def informationMessage(self):            reply = QtGui.QMessageBox.information(self,                "QMessageBox.information()", Dialog.MESSAGE)        if reply == QtGui.QMessageBox.Ok:            self.informationLabel.setText("OK")        else:            self.informationLabel.setText("Escape")    def questionMessage(self):            reply = QtGui.QMessageBox.question(self, "QMessageBox.question()",                Dialog.MESSAGE,                QtGui.QMessageBox.Yes | QtGui.QMessageBox.No | QtGui.QMessageBox.Cancel)        if reply == QtGui.QMessageBox.Yes:            self.questionLabel.setText("Yes")        elif reply == QtGui.QMessageBox.No:            self.questionLabel.setText("No")        else:            self.questionLabel.setText("Cancel")    def warningMessage(self):            msgBox = QtGui.QMessageBox(QtGui.QMessageBox.Warning,                "QMessageBox.warning()", Dialog.MESSAGE,                QtGui.QMessageBox.NoButton, self)        msgBox.addButton("Save &Again", QtGui.QMessageBox.AcceptRole)        msgBox.addButton("&Continue", QtGui.QMessageBox.RejectRole)        if msgBox.exec_() == QtGui.QMessageBox.AcceptRole:            self.warningLabel.setText("Save Again")        else:            self.warningLabel.setText("Continue")    def errorMessage(self):            self.errorMessageDialog.showMessage("This dialog shows and remembers "                "error messages. If the checkbox is checked (as it is by "                "default), the shown message will be shown again, but if the "                "user unchecks the box the message will not appear again if "                "QErrorMessage.showMessage() is called with the same message.")        self.errorLabel.setText("If the box is unchecked, the message won‘t "                "appear again.")if __name__ == ‘__main__‘:    app = QtGui.QApplication(sys.argv)    dialog = Dialog()    sys.exit(dialog.exec_())