Previous topic
Address Book Example¶
The address book example shows how to use proxy models to display different views onto data from a single model.
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())
import sys
from PySide6.QtCore import Qt
from PySide6.QtWidgets import (QApplication, QGridLayout,
QLabel, QGridLayout, QLineEdit, QTextEdit,
QWidget)
class AddressBook(QWidget):
def __init__(self, parent=None):
super().__init__(parent)
name_label = QLabel("Name:")
self._name_line = QLineEdit()
address_label = QLabel("Address:")
self._address_text = QTextEdit()
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)
self.setLayout(main_layout)
self.setWindowTitle("Simple Address Book")
if __name__ == '__main__':
app = QApplication(sys.argv)
address_book = AddressBook()
address_book.show()
sys.exit(app.exec())
import pickle
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):
NavigationMode, AddingMode, EditingMode = range(3)
def __init__(self, parent=None):
super().__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.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)
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.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()
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()
class FindDialog(QDialog):
def __init__(self, parent=None):
super().__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
else:
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())
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._add_button.clicked.connect(self.add_contact)
self._submit_button.clicked.connect(self.submit_contact)
self._cancel_button.clicked.connect(self.cancel)
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()
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)
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._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)
self._submit_button.hide()
self._cancel_button.hide()
def cancel(self):
self._name_line.setText(self._old_name)
self._name_line.setReadOnly(True)
self._address_text.setText(self._old_address)
self._address_text.setReadOnly(True)
self._add_button.setEnabled(True)
self._submit_button.hide()
self._cancel_button.hide()
if __name__ == '__main__':
app = QApplication(sys.argv)
address_book = AddressBook()
address_book.show()
sys.exit(app.exec())
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().__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._export_button = QPushButton("Ex&port")
self._export_button.setToolTip("Export as vCard")
self._export_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)
self._export_button.clicked.connect(self.export_as_vcard)
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.addWidget(self._export_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)
self._export_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._export_button.setEnabled(number >= 1)
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)
def export_as_vcard(self):
name = str(self._name_line.text())
address = self._address_text.toPlainText()
name_list = name.split()
if len(name_list) > 1:
first_name = name_list[0]
last_name = name_list[-1]
else:
first_name = name
last_name = ''
file_name = QFileDialog.getSaveFileName(self, "Export Contact",
'', "vCard Files (*.vcf);;All Files (*)")[0]
if not file_name:
return
out_file = QFile(file_name)
if not out_file.open(QIODevice.WriteOnly):
QMessageBox.information(self, "Unable to open file",
out_file.errorString())
return
out_s = QTextStream(out_file)
out_s << 'BEGIN:VCARD' << '\n'
out_s << 'VERSION:2.1' << '\n'
out_s << 'N:' << last_name << ';' << first_name << '\n'
out_s << 'FN:' << ' '.join(name_list) << '\n'
address.replace(';', '\\;')
address.replace('\n', ';')
address.replace(',', ' ')
out_s << 'ADR;HOME:;' << address << '\n'
out_s << 'END:VCARD' << '\n'
QMessageBox.information(self, "Export Successful",
f'"{name}" has been exported as a vCard.')
class FindDialog(QDialog):
def __init__(self, parent=None):
super().__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())
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().__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().__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())
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):
NavigationMode, AddingMode, EditingMode = range(3)
def __init__(self, parent=None):
super().__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._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._edit_button.clicked.connect(self.edit_contact)
self._remove_button.clicked.connect(self.remove_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)
button_layout_1.addWidget(self._edit_button)
button_layout_1.addWidget(self._remove_button)
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.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 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()
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._next_button.setEnabled(number > 1)
self._previous_button.setEnabled(number > 1)
self._submit_button.hide()
self._cancel_button.hide()
if __name__ == '__main__':
app = QApplication(sys.argv)
address_book = AddressBook()
address_book.show()
sys.exit(app.exec())
© 2022 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.