Address Book Example¶
The address book example shows how to use proxy models to display different views onto data from a single model.
# Copyright (C) 2011 Arun Srinivasan <rulfzid@gmail.com>
# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
from __future__ import annotations
from PySide6.QtCore import (Qt, QAbstractTableModel, QModelIndex)
class TableModel(QAbstractTableModel):
def __init__(self, addresses=None, parent=None):
super().__init__(parent)
if addresses is None:
self.addresses = []
else:
self.addresses = addresses
def rowCount(self, index=QModelIndex()):
""" Returns the number of rows the model holds. """
return len(self.addresses)
def columnCount(self, index=QModelIndex()):
""" Returns the number of columns the model holds. """
return 2
def data(self, index, role=Qt.ItemDataRole.DisplayRole):
""" Depending on the index and role given, return data. If not
returning data, return None (PySide equivalent of QT's
"invalid QVariant").
"""
if not index.isValid():
return None
if not 0 <= index.row() < len(self.addresses):
return None
if role == Qt.ItemDataRole.DisplayRole:
name = self.addresses[index.row()]["name"]
address = self.addresses[index.row()]["address"]
if index.column() == 0:
return name
elif index.column() == 1:
return address
return None
def headerData(self, section, orientation, role=Qt.ItemDataRole.DisplayRole):
""" Set the headers to be displayed. """
if role != Qt.ItemDataRole.DisplayRole:
return None
if orientation == Qt.Orientation.Horizontal:
if section == 0:
return "Name"
elif section == 1:
return "Address"
return None
def insertRows(self, position, rows=1, index=QModelIndex()):
""" Insert a row into the model. """
self.beginInsertRows(QModelIndex(), position, position + rows - 1)
for row in range(rows):
self.addresses.insert(position + row, {"name": "", "address": ""})
self.endInsertRows()
return True
def removeRows(self, position, rows=1, index=QModelIndex()):
""" Remove a row from the model. """
self.beginRemoveRows(QModelIndex(), position, position + rows - 1)
del self.addresses[position:position + rows]
self.endRemoveRows()
return True
def setData(self, index, value, role=Qt.ItemDataRole.EditRole):
""" Adjust the data (set it to <value>) depending on the given
index and role.
"""
if role != Qt.ItemDataRole.EditRole:
return False
if index.isValid() and 0 <= index.row() < len(self.addresses):
address = self.addresses[index.row()]
if index.column() == 0:
address["name"] = value
elif index.column() == 1:
address["address"] = value
else:
return False
self.dataChanged.emit(index, index, 0)
return True
return False
def flags(self, index):
""" Set the item flags at the given index. Seems like we're
implementing this function just to see how it's done, as we
manually adjust each tableView to have NoEditTriggers.
"""
if not index.isValid():
return Qt.ItemIsEnabled
return Qt.ItemFlags(QAbstractTableModel.flags(self, index)
| Qt.ItemIsEditable)
# Copyright (C) 2011 Arun Srinivasan <rulfzid@gmail.com>
# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
from __future__ import annotations
from PySide6.QtCore import Slot
from PySide6.QtGui import QAction
from PySide6.QtWidgets import (QMainWindow, QFileDialog, QApplication)
from addresswidget import AddressWidget
class MainWindow(QMainWindow):
def __init__(self, parent=None):
super().__init__(parent)
self._address_widget = AddressWidget()
self.setCentralWidget(self._address_widget)
self.create_menus()
self.setWindowTitle("Address Book")
def create_menus(self):
# Create the main menuBar menu items
file_menu = self.menuBar().addMenu("&File")
tool_menu = self.menuBar().addMenu("&Tools")
# Populate the File menu
self.open_action = self.create_action("&Open...", file_menu, self.open_file)
self.save_action = self.create_action("&Save As...", file_menu, self.save_file)
file_menu.addSeparator()
self.exit_action = self.create_action("E&xit", file_menu, self.close)
# Populate the Tools menu
self.add_action = self.create_action(
"&Add Entry...", tool_menu, self._address_widget.add_entry)
self._edit_action = self.create_action(
"&Edit Entry...", tool_menu, self._address_widget.edit_entry)
tool_menu.addSeparator()
self._remove_action = self.create_action(
"&Remove Entry", tool_menu, self._address_widget.remove_entry)
# Disable the edit and remove menu items initially, as there are
# no items yet.
self._edit_action.setEnabled(False)
self._remove_action.setEnabled(False)
# Wire up the updateActions slot
self._address_widget.selection_changed.connect(self.update_actions)
def create_action(self, text, menu, slot):
""" Helper function to save typing when populating menus
with action.
"""
action = QAction(text, self)
menu.addAction(action)
action.triggered.connect(slot)
return action
# Quick gotcha:
#
# QFiledialog.getOpenFilename and QFileDialog.get.SaveFileName don't
# behave in PySide6 as they do in Qt, where they return a QString
# containing the filename.
#
# In PySide6, these functions return a tuple: (filename, filter)
@Slot()
def open_file(self):
filename, _ = QFileDialog.getOpenFileName(self)
if filename:
self._address_widget.read_from_file(filename)
@Slot()
def save_file(self):
filename, _ = QFileDialog.getSaveFileName(self)
if filename:
self._address_widget.write_to_file(filename)
def update_actions(self, selection):
""" Only allow the user to remove or edit an item if an item
is actually selected.
"""
indexes = selection.indexes()
if len(indexes) > 0:
self._remove_action.setEnabled(True)
self._edit_action.setEnabled(True)
else:
self._remove_action.setEnabled(False)
self._edit_action.setEnabled(False)
if __name__ == "__main__":
""" Run the application. """
import sys
app = QApplication(sys.argv)
mw = MainWindow()
mw.show()
sys.exit(app.exec())
# Copyright (C) 2011 Arun Srinivasan <rulfzid@gmail.com>
# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
from __future__ import annotations
from PySide6.QtCore import Qt
from PySide6.QtWidgets import (QDialog, QLabel, QTextEdit, QLineEdit,
QDialogButtonBox, QGridLayout, QVBoxLayout)
class AddDialogWidget(QDialog):
""" A dialog to add a new address to the addressbook. """
def __init__(self, parent=None):
super().__init__(parent)
name_label = QLabel("Name")
address_label = QLabel("Address")
button_box = QDialogButtonBox(QDialogButtonBox.Ok
| QDialogButtonBox.Cancel)
self._name_text = QLineEdit()
self._address_text = QTextEdit()
grid = QGridLayout()
grid.setColumnStretch(1, 2)
grid.addWidget(name_label, 0, 0)
grid.addWidget(self._name_text, 0, 1)
grid.addWidget(address_label, 1, 0, Qt.AlignLeft | Qt.AlignTop)
grid.addWidget(self._address_text, 1, 1, Qt.AlignLeft)
layout = QVBoxLayout()
layout.addLayout(grid)
layout.addWidget(button_box)
self.setLayout(layout)
self.setWindowTitle("Add a Contact")
button_box.accepted.connect(self.accept)
button_box.rejected.connect(self.reject)
# These properties make using this dialog a little cleaner. It's much
# nicer to type "addDialog.address" to retrieve the address as compared
# to "addDialog.addressText.toPlainText()"
@property
def name(self):
return self._name_text.text()
@property
def address(self):
return self._address_text.toPlainText()
if __name__ == "__main__":
import sys
from PySide6.QtWidgets import QApplication
app = QApplication(sys.argv)
dialog = AddDialogWidget()
if (dialog.exec()):
name = dialog.name
address = dialog.address
print(f"Name: {name}")
print(f"Address: {address}")
# Copyright (C) 2011 Arun Srinivasan <rulfzid@gmail.com>
# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
from __future__ import annotations
try:
import cpickle as pickle
except ImportError:
import pickle
from PySide6.QtCore import (Qt, Signal, Slot, QRegularExpression, QModelIndex,
QItemSelection, QSortFilterProxyModel)
from PySide6.QtWidgets import QTabWidget, QMessageBox, QTableView, QAbstractItemView
from tablemodel import TableModel
from newaddresstab import NewAddressTab
from adddialogwidget import AddDialogWidget
class AddressWidget(QTabWidget):
""" The central widget of the application. Most of the addressbook's
functionality is contained in this class.
"""
selection_changed = Signal(QItemSelection)
def __init__(self, parent=None):
""" Initialize the AddressWidget. """
super().__init__(parent)
self._table_model = TableModel()
self._new_address_tab = NewAddressTab()
self._new_address_tab.send_details.connect(self.add_entry)
self.addTab(self._new_address_tab, "Address Book")
self.setup_tabs()
@Slot()
def add_entry(self, name=None, address=None):
""" Add an entry to the addressbook. """
if name is None and address is None:
add_dialog = AddDialogWidget()
if add_dialog.exec():
name = add_dialog.name
address = add_dialog.address
address = {"name": name, "address": address}
addresses = self._table_model.addresses[:]
# The QT docs for this example state that what we're doing here
# is checking if the entered name already exists. What they
# (and we here) are actually doing is checking if the whole
# name/address pair exists already - ok for the purposes of this
# example, but obviously not how a real addressbook application
# should behave.
try:
addresses.remove(address)
QMessageBox.information(self, "Duplicate Name",
f'The name "{name}" already exists.')
except ValueError:
# The address didn't already exist, so let's add it to the model.
# Step 1: create the row
self._table_model.insertRows(0)
# Step 2: get the index of the newly created row and use it.
# to set the name
ix = self._table_model.index(0, 0, QModelIndex())
self._table_model.setData(ix, address["name"], Qt.ItemDataRole.EditRole)
# Step 3: lather, rinse, repeat for the address.
ix = self._table_model.index(0, 1, QModelIndex())
self._table_model.setData(ix, address["address"], Qt.ItemDataRole.EditRole)
# Remove the newAddressTab, as we now have at least one
# address in the model.
self.removeTab(self.indexOf(self._new_address_tab))
# The screenshot for the QT example shows nicely formatted
# multiline cells, but the actual application doesn't behave
# quite so nicely, at least on Ubuntu. Here we resize the newly
# created row so that multiline addresses look reasonable.
table_view = self.currentWidget()
table_view.resizeRowToContents(ix.row())
@Slot()
def edit_entry(self):
""" Edit an entry in the addressbook. """
table_view = self.currentWidget()
proxy_model = table_view.model()
selection_model = table_view.selectionModel()
# Get the name and address of the currently selected row.
indexes = selection_model.selectedRows()
if len(indexes) != 1:
return
row = proxy_model.mapToSource(indexes[0]).row()
ix = self._table_model.index(row, 0, QModelIndex())
name = self._table_model.data(ix, Qt.ItemDataRole.DisplayRole)
ix = self._table_model.index(row, 1, QModelIndex())
address = self._table_model.data(ix, Qt.ItemDataRole.DisplayRole)
# Open an addDialogWidget, and only allow the user to edit the address.
add_dialog = AddDialogWidget()
add_dialog.setWindowTitle("Edit a Contact")
add_dialog._name_text.setReadOnly(True)
add_dialog._name_text.setText(name)
add_dialog._address_text.setText(address)
# If the address is different, add it to the model.
if add_dialog.exec():
new_address = add_dialog.address
if new_address != address:
ix = self._table_model.index(row, 1, QModelIndex())
self._table_model.setData(ix, new_address, Qt.ItemDataRole.EditRole)
@Slot()
def remove_entry(self):
""" Remove an entry from the addressbook. """
table_view = self.currentWidget()
proxy_model = table_view.model()
selection_model = table_view.selectionModel()
# Just like editEntry, but this time remove the selected row.
indexes = selection_model.selectedRows()
for index in indexes:
row = proxy_model.mapToSource(index).row()
self._table_model.removeRows(row)
# If we've removed the last address in the model, display the
# newAddressTab
if self._table_model.rowCount() == 0:
self.insertTab(0, self._new_address_tab, "Address Book")
def setup_tabs(self):
""" Setup the various tabs in the AddressWidget. """
groups = ["ABC", "DEF", "GHI", "JKL", "MNO", "PQR", "STU", "VW", "XYZ"]
for group in groups:
proxy_model = QSortFilterProxyModel(self)
proxy_model.setSourceModel(self._table_model)
proxy_model.setDynamicSortFilter(True)
table_view = QTableView()
table_view.setModel(proxy_model)
table_view.setSortingEnabled(True)
table_view.setSelectionBehavior(QAbstractItemView.SelectRows)
table_view.horizontalHeader().setStretchLastSection(True)
table_view.verticalHeader().hide()
table_view.setEditTriggers(QAbstractItemView.NoEditTriggers)
table_view.setSelectionMode(QAbstractItemView.SingleSelection)
# This here be the magic: we use the group name (e.g. "ABC") to
# build the regex for the QSortFilterProxyModel for the group's
# tab. The regex will end up looking like "^[ABC].*", only
# allowing this tab to display items where the name starts with
# "A", "B", or "C". Notice that we set it to be case-insensitive.
re = QRegularExpression(f"^[{group}].*")
assert re.isValid()
re.setPatternOptions(QRegularExpression.CaseInsensitiveOption)
proxy_model.setFilterRegularExpression(re)
proxy_model.setFilterKeyColumn(0) # Filter on the "name" column
proxy_model.sort(0, Qt.AscendingOrder)
# This prevents an application crash (see:
# https://www.qtcentre.org/threads/58874-QListView-SelectionModel-selectionChanged-Crash) # noqa: E501
self.viewselectionmodel = table_view.selectionModel()
table_view.selectionModel().selectionChanged.connect(self.selection_changed)
self.addTab(table_view, group)
# Note: the QT example uses a QDataStream for the saving and loading.
# Here we're using a python dictionary to store the addresses, which
# can't be streamed using QDataStream, so we just use cpickle for this
# example.
def read_from_file(self, filename):
""" Read contacts in from a file. """
try:
f = open(filename, "rb")
addresses = pickle.load(f)
except IOError:
QMessageBox.information(self, f"Unable to open file: {filename}")
finally:
f.close()
if len(addresses) == 0:
QMessageBox.information(self, f"No contacts in file: {filename}")
else:
for address in addresses:
self.add_entry(address["name"], address["address"])
def write_to_file(self, filename):
""" Save all contacts in the model to a file. """
try:
f = open(filename, "wb")
pickle.dump(self._table_model.addresses, f)
except IOError:
QMessageBox.information(self, f"Unable to open file: {filename}")
finally:
f.close()
if __name__ == "__main__":
import sys
from PySide6.QtWidgets import QApplication
app = QApplication(sys.argv)
address_widget = AddressWidget()
address_widget.show()
sys.exit(app.exec())
# Copyright (C) 2011 Arun Srinivasan <rulfzid@gmail.com>
# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
from __future__ import annotations
from PySide6.QtCore import (Qt, Signal)
from PySide6.QtWidgets import (QWidget, QLabel, QPushButton, QVBoxLayout)
from adddialogwidget import AddDialogWidget
class NewAddressTab(QWidget):
""" An extra tab that prompts the user to add new contacts.
To be displayed only when there are no contacts in the model.
"""
send_details = Signal(str, str)
def __init__(self, parent=None):
super().__init__(parent)
description_label = QLabel("There are no contacts in your address book."
"\nClick Add to add new contacts.")
add_button = QPushButton("Add")
layout = QVBoxLayout()
layout.addWidget(description_label)
layout.addWidget(add_button, 0, Qt.AlignCenter)
self.setLayout(layout)
add_button.clicked.connect(self.add_entry)
def add_entry(self):
add_dialog = AddDialogWidget()
if add_dialog.exec():
name = add_dialog.name
address = add_dialog.address
self.send_details.emit(name, address)
if __name__ == "__main__":
def print_address(name, address):
print(f"Name: {name}")
print(f"Address: {address}")
import sys
from PySide6.QtWidgets import QApplication
app = QApplication(sys.argv)
new_address_tab = NewAddressTab()
new_address_tab.send_details.connect(print_address)
new_address_tab.show()
sys.exit(app.exec())