############################################################################# ## ## Copyright (C) 2013 Riverbank Computing Limited. ## Copyright (C) 2016 The Qt Company Ltd. ## Contact: https://www.qt.io/licensing/ ## ## This file is part of the Qt for Python 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." ## ## $QT_END_LICENSE$ ## ############################################################################# import sys from PySide6.QtCore import Qt, Signal, Slot from PySide6.QtWidgets import (QApplication, QDialog, QGridLayout, QHBoxLayout, QLabel, QLineEdit, QMessageBox, QPushButton, QTextEdit, QVBoxLayout, QWidget) 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(QWidget): def __init__(self, parent=None): super().__init__(parent) self.contacts = SortedDict() self._old_name = '' self._old_address = '' name_label = QLabel("Name:") self._name_line = QLineEdit() self._name_line.setReadOnly(True) address_label = QLabel("Address:") self._address_text = QTextEdit() self._address_text.setReadOnly(True) self._add_button = QPushButton("&Add") self._submit_button = QPushButton("&Submit") self._submit_button.hide() self._cancel_button = QPushButton("&Cancel") self._cancel_button.hide() self._next_button = QPushButton("&Next") self._next_button.setEnabled(False) self._previous_button = QPushButton("&Previous") self._previous_button.setEnabled(False) self._add_button.clicked.connect(self.add_contact) self._submit_button.clicked.connect(self.submit_contact) self._cancel_button.clicked.connect(self.cancel) self._next_button.clicked.connect(self.next) self._previous_button.clicked.connect(self.previous) button_layout_1 = QVBoxLayout() button_layout_1.addWidget(self._add_button, Qt.AlignTop) button_layout_1.addWidget(self._submit_button) button_layout_1.addWidget(self._cancel_button) button_layout_1.addStretch() button_layout_2 = QHBoxLayout() button_layout_2.addWidget(self._previous_button) button_layout_2.addWidget(self._next_button) main_layout = QGridLayout() main_layout.addWidget(name_label, 0, 0) main_layout.addWidget(self._name_line, 0, 1) main_layout.addWidget(address_label, 1, 0, Qt.AlignTop) main_layout.addWidget(self._address_text, 1, 1) main_layout.addLayout(button_layout_1, 1, 2) main_layout.addLayout(button_layout_2, 3, 1) self.setLayout(main_layout) self.setWindowTitle("Simple Address Book") def add_contact(self): self._old_name = self._name_line.text() self._old_address = self._address_text.toPlainText() self._name_line.clear() self._address_text.clear() self._name_line.setReadOnly(False) self._name_line.setFocus(Qt.OtherFocusReason) self._address_text.setReadOnly(False) self._add_button.setEnabled(False) self._next_button.setEnabled(False) self._previous_button.setEnabled(False) self._submit_button.show() self._cancel_button.show() def submit_contact(self): name = self._name_line.text() address = self._address_text.toPlainText() if name == "" or address == "": QMessageBox.information(self, "Empty Field", "Please enter a name and address.") return if name not in self.contacts: self.contacts[name] = address QMessageBox.information(self, "Add Successful", f'"{name}" has been added to your address book.') else: QMessageBox.information(self, "Add Unsuccessful", f'Sorry, "{name}" is already in your address book.') return if not self.contacts: self._name_line.clear() self._address_text.clear() self._name_line.setReadOnly(True) self._address_text.setReadOnly(True) self._add_button.setEnabled(True) number = len(self.contacts) self._next_button.setEnabled(number > 1) self._previous_button.setEnabled(number > 1) self._submit_button.hide() self._cancel_button.hide() def cancel(self): self._name_line.setText(self._old_name) self._address_text.setText(self._old_address) if not self.contacts: self._name_line.clear() self._address_text.clear() self._name_line.setReadOnly(True) self._address_text.setReadOnly(True) self._add_button.setEnabled(True) number = len(self.contacts) self._next_button.setEnabled(number > 1) self._previous_button.setEnabled(number > 1) self._submit_button.hide() self._cancel_button.hide() def next(self): name = self._name_line.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._name_line.setText(next_name) self._address_text.setText(next_address) def previous(self): name = self._name_line.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._name_line.clear() self._address_text.clear() return if prev_name is None: for prev_name, prev_address in self.contacts: pass self._name_line.setText(prev_name) self._address_text.setText(prev_address) if __name__ == '__main__': app = QApplication(sys.argv) address_book = AddressBook() address_book.show() sys.exit(app.exec())