############################################################################# ## ## Copyright (C) 2013 Riverbank Computing Limited. ## Copyright (C) 2021 The Qt Company Ltd. ## Contact: http://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 pickle import sys from PySide6.QtCore import QFile, QIODevice, QTextStream, Qt, Signal, Slot from PySide6.QtWidgets import (QApplication, QDialog, QFileDialog, 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): NavigationMode, AddingMode, EditingMode = range(3) def __init__(self, parent=None): super(AddressBook, self).__init__(parent) self.contacts = SortedDict() self._old_name = '' self._old_address = '' self._current_mode = self.NavigationMode 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._edit_button = QPushButton("&Edit") self._edit_button.setEnabled(False) self._remove_button = QPushButton("&Remove") self._remove_button.setEnabled(False) self._find_button = QPushButton("&Find") self._find_button.setEnabled(False) 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._load_button = QPushButton("&Load...") self._load_button.setToolTip("Load contacts from a file") self._save_button = QPushButton("Sa&ve...") self._save_button.setToolTip("Save contacts to a file") self._save_button.setEnabled(False) self.dialog = FindDialog() self._add_button.clicked.connect(self.add_contact) self._submit_button.clicked.connect(self.submit_contact) self._edit_button.clicked.connect(self.edit_contact) self._remove_button.clicked.connect(self.remove_contact) self._find_button.clicked.connect(self.find_contact) self._cancel_button.clicked.connect(self.cancel) self._next_button.clicked.connect(self.next) self._previous_button.clicked.connect(self.previous) self._load_button.clicked.connect(self.load_from_file) self._save_button.clicked.connect(self.save_to_file) button_layout_1 = QVBoxLayout() button_layout_1.addWidget(self._add_button) button_layout_1.addWidget(self._edit_button) button_layout_1.addWidget(self._remove_button) button_layout_1.addWidget(self._find_button) button_layout_1.addWidget(self._submit_button) button_layout_1.addWidget(self._cancel_button) button_layout_1.addWidget(self._load_button) button_layout_1.addWidget(self._save_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, 2, 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.update_interface(self.AddingMode) def edit_contact(self): self._old_name = self._name_line.text() self._old_address = self._address_text.toPlainText() self.update_interface(self.EditingMode) 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 self._current_mode == self.AddingMode: 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 elif self._current_mode == self.EditingMode: if self._old_name != name: if name not in self.contacts: QMessageBox.information(self, "Edit Successful", f'"{self.oldName}" has been edited in your address book.') del self.contacts[self._old_name] self.contacts[name] = address else: QMessageBox.information(self, "Edit Unsuccessful", f'Sorry, "{name}" is already in your address book.') return elif self._old_address != address: QMessageBox.information(self, "Edit Successful", f'"{name}" has been edited in your address book.') self.contacts[name] = address self.update_interface(self.NavigationMode) def cancel(self): self._name_line.setText(self._old_name) self._address_text.setText(self._old_address) self.update_interface(self.NavigationMode) def remove_contact(self): name = self._name_line.text() address = self._address_text.toPlainText() if name in self.contacts: button = QMessageBox.question(self, "Confirm Remove", f'Are you sure you want to remove "{name}"?', QMessageBox.Yes | QMessageBox.No) if button == QMessageBox.Yes: self.previous() del self.contacts[name] QMessageBox.information(self, "Remove Successful", f'"{name}" has been removed from your address book.') self.update_interface(self.NavigationMode) 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) def find_contact(self): self.dialog.show() if self.dialog.exec_() == QDialog.Accepted: contact_name = self.dialog.get_find_text() if contact_name in self.contacts: self._name_line.setText(contact_name) self._address_text.setText(self.contacts[contact_name]) else: QMessageBox.information(self, "Contact Not Found", f'Sorry, "{contact_name}" is not in your address book.') return self.update_interface(self.NavigationMode) def update_interface(self, mode): self._current_mode = mode if self._current_mode in (self.AddingMode, self.EditingMode): self._name_line.setReadOnly(False) self._name_line.setFocus(Qt.OtherFocusReason) self._address_text.setReadOnly(False) self._add_button.setEnabled(False) self._edit_button.setEnabled(False) self._remove_button.setEnabled(False) self._next_button.setEnabled(False) self._previous_button.setEnabled(False) self._submit_button.show() self._cancel_button.show() self._load_button.setEnabled(False) self._save_button.setEnabled(False) elif self._current_mode == self.NavigationMode: 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._edit_button.setEnabled(number >= 1) self._remove_button.setEnabled(number >= 1) self._find_button.setEnabled(number > 2) self._next_button.setEnabled(number > 1) self._previous_button.setEnabled(number >1 ) self._submit_button.hide() self._cancel_button.hide() self._load_button.setEnabled(True) self._save_button.setEnabled(number >= 1) def save_to_file(self): fileName,_ = QFileDialog.getSaveFileName(self, "Save Address Book", '', "Address Book (*.abk);;All Files (*)") if not fileName: return try: out_file = open(str(fileName), 'wb') except IOError: QMessageBox.information(self, "Unable to open file", f'There was an error opening "{fileName}"') return pickle.dump(self.contacts, out_file) out_file.close() def load_from_file(self): fileName,_ = QFileDialog.getOpenFileName(self, "Open Address Book", '', "Address Book (*.abk);;All Files (*)") if not fileName: return try: in_file = open(str(fileName), 'rb') except IOError: QMessageBox.information(self, "Unable to open file", f'There was an error opening "{fileName}"') return self.contacts = pickle.load(in_file) in_file.close() if len(self.contacts) == 0: QMessageBox.information(self, "No contacts in file", "The file you are attempting to open contains no " "contacts.") else: for name, address in self.contacts: self._name_line.setText(name) self._address_text.setText(address) self.update_interface(self.NavigationMode) class FindDialog(QDialog): def __init__(self, parent=None): super(FindDialog, self).__init__(parent) find_label = QLabel("Enter the name of a contact:") self._line_edit = QLineEdit() self._find_button = QPushButton("&Find") self._find_text = '' layout = QHBoxLayout() layout.addWidget(find_label) layout.addWidget(self._line_edit) layout.addWidget(self._find_button) self.setLayout(layout) self.setWindowTitle("Find a Contact") self._find_button.clicked.connect(self.find_clicked) self._find_button.clicked.connect(self.accept) def find_clicked(self): text = self._line_edit.text() if not text: QMessageBox.information(self, "Empty Field", "Please enter a name.") return self._find_text = text self._line_edit.clear() self.hide() def get_find_text(self): return self._find_text if __name__ == '__main__': app = QApplication(sys.argv) address_book = AddressBook() address_book.show() sys.exit(app.exec_())