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+#!/usr/bin/env python
+
+#############################################################################
+##
+## Copyright (C) 2013 Riverbank Computing Limited.
+## Copyright (C) 2016 The Qt Company Ltd.
+## Contact: http://www.qt.io/licensing/
+##
+## This file is part of the PySide examples of the Qt Toolkit.
+##
+## $QT_BEGIN_LICENSE:BSD$
+## You may use this file under the terms of the BSD license as follows:
+##
+## "Redistribution and use in source and binary forms, with or without
+## modification, are permitted provided that the following conditions are
+## met:
+## * Redistributions of source code must retain the above copyright
+## notice, this list of conditions and the following disclaimer.
+## * Redistributions in binary form must reproduce the above copyright
+## notice, this list of conditions and the following disclaimer in
+## the documentation and/or other materials provided with the
+## distribution.
+## * Neither the name of The Qt Company Ltd nor the names of its
+## contributors may be used to endorse or promote products derived
+## from this software without specific prior written permission.
+##
+##
+## THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+## "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+## LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+## A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+## OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+## SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+## LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+## DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+## THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+## (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+## OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+##
+## $QT_END_LICENSE$
+##
+#############################################################################
+
+from PySide2 import QtCore, QtGui, QtWidgets
+
+
+class SortedDict(dict):
+ class Iterator(object):
+ def __init__(self, sorted_dict):
+ self._dict = sorted_dict
+ self._keys = sorted(self._dict.keys())
+ self._nr_items = len(self._keys)
+ self._idx = 0
+
+ def __iter__(self):
+ return self
+
+ def next(self):
+ if self._idx >= self._nr_items:
+ raise StopIteration
+
+ key = self._keys[self._idx]
+ value = self._dict[key]
+ self._idx += 1
+
+ return key, value
+
+ __next__ = next
+
+ def __iter__(self):
+ return SortedDict.Iterator(self)
+
+ iterkeys = __iter__
+
+
+class AddressBook(QtWidgets.QWidget):
+ NavigationMode, AddingMode, EditingMode = range(3)
+
+ def __init__(self, parent=None):
+ super(AddressBook, self).__init__(parent)
+
+ self.contacts = SortedDict()
+ self.oldName = ''
+ self.oldAddress = ''
+ self.currentMode = self.NavigationMode
+
+ nameLabel = QtWidgets.QLabel("Name:")
+ self.nameLine = QtWidgets.QLineEdit()
+ self.nameLine.setReadOnly(True)
+
+ addressLabel = QtWidgets.QLabel("Address:")
+ self.addressText = QtWidgets.QTextEdit()
+ self.addressText.setReadOnly(True)
+
+ self.addButton = QtWidgets.QPushButton("&Add")
+ self.addButton.show()
+ self.editButton = QtWidgets.QPushButton("&Edit")
+ self.editButton.setEnabled(False)
+ self.removeButton = QtWidgets.QPushButton("&Remove")
+ self.removeButton.setEnabled(False)
+ self.submitButton = QtWidgets.QPushButton("&Submit")
+ self.submitButton.hide()
+ self.cancelButton = QtWidgets.QPushButton("&Cancel")
+ self.cancelButton.hide()
+
+ self.nextButton = QtWidgets.QPushButton("&Next")
+ self.nextButton.setEnabled(False)
+ self.previousButton = QtWidgets.QPushButton("&Previous")
+ self.previousButton.setEnabled(False)
+
+ self.addButton.clicked.connect(self.addContact)
+ self.submitButton.clicked.connect(self.submitContact)
+ self.editButton.clicked.connect(self.editContact)
+ self.removeButton.clicked.connect(self.removeContact)
+ self.cancelButton.clicked.connect(self.cancel)
+ self.nextButton.clicked.connect(self.next)
+ self.previousButton.clicked.connect(self.previous)
+
+ buttonLayout1 = QtWidgets.QVBoxLayout()
+ buttonLayout1.addWidget(self.addButton)
+ buttonLayout1.addWidget(self.editButton)
+ buttonLayout1.addWidget(self.removeButton)
+ buttonLayout1.addWidget(self.submitButton)
+ buttonLayout1.addWidget(self.cancelButton)
+ buttonLayout1.addStretch()
+
+ buttonLayout2 = QtWidgets.QHBoxLayout()
+ buttonLayout2.addWidget(self.previousButton)
+ buttonLayout2.addWidget(self.nextButton)
+
+ mainLayout = QtWidgets.QGridLayout()
+ mainLayout.addWidget(nameLabel, 0, 0)
+ mainLayout.addWidget(self.nameLine, 0, 1)
+ mainLayout.addWidget(addressLabel, 1, 0, QtCore.Qt.AlignTop)
+ mainLayout.addWidget(self.addressText, 1, 1)
+ mainLayout.addLayout(buttonLayout1, 1, 2)
+ mainLayout.addLayout(buttonLayout2, 3, 1)
+
+ self.setLayout(mainLayout)
+ self.setWindowTitle("Simple Address Book")
+
+ def addContact(self):
+ self.oldName = self.nameLine.text()
+ self.oldAddress = self.addressText.toPlainText()
+
+ self.nameLine.clear()
+ self.addressText.clear()
+
+ self.updateInterface(self.AddingMode)
+
+ def editContact(self):
+ self.oldName = self.nameLine.text()
+ self.oldAddress = self.addressText.toPlainText()
+
+ self.updateInterface(self.EditingMode)
+
+ def submitContact(self):
+ name = self.nameLine.text()
+ address = self.addressText.toPlainText()
+
+ if name == "" or address == "":
+ QtWidgets.QMessageBox.information(self, "Empty Field",
+ "Please enter a name and address.")
+ return
+
+ if self.currentMode == self.AddingMode:
+ if name not in self.contacts:
+ self.contacts[name] = address
+ QtWidgets.QMessageBox.information(self, "Add Successful",
+ "\"%s\" has been added to your address book." % name)
+ else:
+ QtWidgets.QMessageBox.information(self, "Add Unsuccessful",
+ "Sorry, \"%s\" is already in your address book." % name)
+ return
+
+ elif self.currentMode == self.EditingMode:
+ if self.oldName != name:
+ if name not in self.contacts:
+ QtWidgets.QMessageBox.information(self, "Edit Successful",
+ "\"%s\" has been edited in your address book." % self.oldName)
+ del self.contacts[self.oldName]
+ self.contacts[name] = address
+ else:
+ QtWidgets.QMessageBox.information(self, "Edit Unsuccessful",
+ "Sorry, \"%s\" is already in your address book." % name)
+ return
+ elif self.oldAddress != address:
+ QtWidgets.QMessageBox.information(self, "Edit Successful",
+ "\"%s\" has been edited in your address book." % name)
+ self.contacts[name] = address
+
+ self.updateInterface(self.NavigationMode)
+
+ def cancel(self):
+ self.nameLine.setText(self.oldName)
+ self.addressText.setText(self.oldAddress)
+ self.updateInterface(self.NavigationMode)
+
+ def removeContact(self):
+ name = self.nameLine.text()
+ address = self.addressText.toPlainText()
+
+ if name in self.contacts:
+ button = QtWidgets.QMessageBox.question(self, "Confirm Remove",
+ "Are you sure you want to remove \"%s\"?" % name,
+ QtWidgets.QMessageBox.Yes | QtWidgets.QMessageBox.No)
+
+ if button == QtWidgets.QMessageBox.Yes:
+ self.previous()
+ del self.contacts[name]
+
+ QtWidgets.QMessageBox.information(self, "Remove Successful",
+ "\"%s\" has been removed from your address book." % name)
+
+ self.updateInterface(self.NavigationMode)
+
+ def next(self):
+ name = self.nameLine.text()
+ it = iter(self.contacts)
+
+ try:
+ while True:
+ this_name, _ = it.next()
+
+ if this_name == name:
+ next_name, next_address = it.next()
+ break
+ except StopIteration:
+ next_name, next_address = iter(self.contacts).next()
+
+ self.nameLine.setText(next_name)
+ self.addressText.setText(next_address)
+
+ def previous(self):
+ name = self.nameLine.text()
+
+ prev_name = prev_address = None
+ for this_name, this_address in self.contacts:
+ if this_name == name:
+ break
+
+ prev_name = this_name
+ prev_address = this_address
+ else:
+ self.nameLine.clear()
+ self.addressText.clear()
+ return
+
+ if prev_name is None:
+ for prev_name, prev_address in self.contacts:
+ pass
+
+ self.nameLine.setText(prev_name)
+ self.addressText.setText(prev_address)
+
+ def updateInterface(self, mode):
+ self.currentMode = mode
+
+ if self.currentMode in (self.AddingMode, self.EditingMode):
+ self.nameLine.setReadOnly(False)
+ self.nameLine.setFocus(QtCore.Qt.OtherFocusReason)
+ self.addressText.setReadOnly(False)
+
+ self.addButton.setEnabled(False)
+ self.editButton.setEnabled(False)
+ self.removeButton.setEnabled(False)
+
+ self.nextButton.setEnabled(False)
+ self.previousButton.setEnabled(False)
+
+ self.submitButton.show()
+ self.cancelButton.show()
+
+ elif self.currentMode == self.NavigationMode:
+ if not self.contacts:
+ self.nameLine.clear()
+ self.addressText.clear()
+
+ self.nameLine.setReadOnly(True)
+ self.addressText.setReadOnly(True)
+ self.addButton.setEnabled(True)
+
+ number = len(self.contacts)
+ self.editButton.setEnabled(number >= 1)
+ self.removeButton.setEnabled(number >= 1)
+ self.nextButton.setEnabled(number > 1)
+ self.previousButton.setEnabled(number >1 )
+
+ self.submitButton.hide()
+ self.cancelButton.hide()
+
+
+if __name__ == '__main__':
+ import sys
+
+ app = QtWidgets.QApplication(sys.argv)
+
+ addressBook = AddressBook()
+ addressBook.show()
+
+ sys.exit(app.exec_())