Task Menu Extension Example¶
This example shows how to add custom widgets to Qt Designer, which can be launched with pyside6-designer, and to extend its built-in context menu.
The main mechanism is based on the QPyDesignerCustomWidgetCollection class that takes care of handling the registration.
More information can be found in Custom Widgets in Qt Widgets Designer.
# 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, QPoint, QRect, QSize, Property, Slot
from PySide6.QtGui import QPainter, QPen
from PySide6.QtWidgets import QWidget
EMPTY = '-'
CROSS = 'X'
NOUGHT = 'O'
DEFAULT_STATE = "---------"
class TicTacToe(QWidget):
def __init__(self, parent=None):
super().__init__(parent)
self._state = DEFAULT_STATE
self._turn_number = 0
def minimumSizeHint(self):
return QSize(200, 200)
def sizeHint(self):
return QSize(200, 200)
def setState(self, new_state):
self._turn_number = 0
self._state = DEFAULT_STATE
for position in range(min(9, len(new_state))):
mark = new_state[position]
if mark == CROSS or mark == NOUGHT:
self._turn_number += 1
self._change_state_at(position, mark)
position += 1
self.update()
def state(self):
return self._state
@Slot()
def clear_board(self):
self._state = DEFAULT_STATE
self._turn_number = 0
self.update()
def _change_state_at(self, pos, new_state):
self._state = (self._state[:pos] + new_state
+ self._state[pos + 1:])
def mousePressEvent(self, event):
if self._turn_number == 9:
self.clear_board()
return
for position in range(9):
cell = self._cell_rect(position)
if cell.contains(event.position().toPoint()):
if self._state[position] == EMPTY:
new_state = CROSS if self._turn_number % 2 == 0 else NOUGHT
self._change_state_at(position, new_state)
self._turn_number += 1
self.update()
def paintEvent(self, event):
with QPainter(self) as painter:
painter.setRenderHint(QPainter.RenderHint.Antialiasing)
painter.setPen(QPen(Qt.GlobalColor.darkGreen, 1))
painter.drawLine(self._cell_width(), 0,
self._cell_width(), self.height())
painter.drawLine(2 * self._cell_width(), 0,
2 * self._cell_width(), self.height())
painter.drawLine(0, self._cell_height(),
self.width(), self._cell_height())
painter.drawLine(0, 2 * self._cell_height(),
self.width(), 2 * self._cell_height())
painter.setPen(QPen(Qt.GlobalColor.darkBlue, 2))
for position in range(9):
cell = self._cell_rect(position)
if self._state[position] == CROSS:
painter.drawLine(cell.topLeft(), cell.bottomRight())
painter.drawLine(cell.topRight(), cell.bottomLeft())
elif self._state[position] == NOUGHT:
painter.drawEllipse(cell)
painter.setPen(QPen(Qt.GlobalColor.yellow, 3))
for position in range(0, 8, 3):
if (self._state[position] != EMPTY
and self._state[position + 1] == self._state[position]
and self._state[position + 2] == self._state[position]):
y = self._cell_rect(position).center().y()
painter.drawLine(0, y, self.width(), y)
self._turn_number = 9
for position in range(3):
if (self._state[position] != EMPTY
and self._state[position + 3] == self._state[position]
and self._state[position + 6] == self._state[position]):
x = self._cell_rect(position).center().x()
painter.drawLine(x, 0, x, self.height())
self._turn_number = 9
if (self._state[0] != EMPTY and self._state[4] == self._state[0]
and self._state[8] == self._state[0]):
painter.drawLine(0, 0, self.width(), self.height())
self._turn_number = 9
if (self._state[2] != EMPTY and self._state[4] == self._state[2]
and self._state[6] == self._state[2]):
painter.drawLine(0, self.height(), self.width(), 0)
self._turn_number = 9
def _cell_rect(self, position):
h_margin = self.width() / 30
v_margin = self.height() / 30
row = int(position / 3)
column = position - 3 * row
pos = QPoint(column * self._cell_width() + h_margin,
row * self._cell_height() + v_margin)
size = QSize(self._cell_width() - 2 * h_margin,
self._cell_height() - 2 * v_margin)
return QRect(pos, size)
def _cell_width(self):
return self.width() / 3
def _cell_height(self):
return self.height() / 3
state = Property(str, state, setState)
# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
from __future__ import annotations
"""PySide6 port of the Qt Designer taskmenuextension example from Qt v6.x"""
import sys
from PySide6.QtWidgets import QApplication
from tictactoe import TicTacToe
if __name__ == '__main__':
app = QApplication(sys.argv)
window = TicTacToe()
window.state = "-X-XO----"
window.show()
sys.exit(app.exec())
# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
from __future__ import annotations
from tictactoe import TicTacToe # noqa: F401
from tictactoeplugin import TicTacToePlugin
from PySide6.QtDesigner import QPyDesignerCustomWidgetCollection
# Set PYSIDE_DESIGNER_PLUGINS to point to this directory and load the plugin
if __name__ == '__main__':
QPyDesignerCustomWidgetCollection.addCustomWidget(TicTacToePlugin())
# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
from __future__ import annotations
from tictactoe import TicTacToe
from tictactoetaskmenu import TicTacToeTaskMenuFactory
from PySide6.QtGui import QIcon
from PySide6.QtDesigner import QDesignerCustomWidgetInterface
DOM_XML = """
<ui language='c++'>
<widget class='TicTacToe' name='ticTacToe'>
<property name='geometry'>
<rect>
<x>0</x>
<y>0</y>
<width>200</width>
<height>200</height>
</rect>
</property>
<property name='state'>
<string>-X-XO----</string>
</property>
</widget>
</ui>
"""
class TicTacToePlugin(QDesignerCustomWidgetInterface):
def __init__(self):
super().__init__()
self._form_editor = None
def createWidget(self, parent):
t = TicTacToe(parent)
return t
def domXml(self):
return DOM_XML
def group(self):
return ''
def icon(self):
return QIcon()
def includeFile(self):
return 'tictactoe'
def initialize(self, form_editor):
self._form_editor = form_editor
manager = form_editor.extensionManager()
iid = TicTacToeTaskMenuFactory.task_menu_iid()
manager.registerExtensions(TicTacToeTaskMenuFactory(manager), iid)
def isContainer(self):
return False
def isInitialized(self):
return self._form_editor is not None
def name(self):
return 'TicTacToe'
def toolTip(self):
return 'Tic Tac Toe Example, demonstrating class QDesignerTaskMenuExtension (Python)'
def whatsThis(self):
return self.toolTip()
# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
from __future__ import annotations
from tictactoe import TicTacToe
from PySide6.QtCore import Slot
from PySide6.QtGui import QAction
from PySide6.QtWidgets import QDialog, QDialogButtonBox, QVBoxLayout
from PySide6.QtDesigner import (QExtensionFactory, QPyDesignerTaskMenuExtension)
class TicTacToeDialog(QDialog):
def __init__(self, parent):
super().__init__(parent)
layout = QVBoxLayout(self)
self._ticTacToe = TicTacToe(self)
layout.addWidget(self._ticTacToe)
button_box = QDialogButtonBox(QDialogButtonBox.StandardButton.Ok
| QDialogButtonBox.StandardButton.Cancel
| QDialogButtonBox.StandardButton.Reset)
button_box.accepted.connect(self.accept)
button_box.rejected.connect(self.reject)
reset_button = button_box.button(QDialogButtonBox.StandardButton.Reset)
reset_button.clicked.connect(self._ticTacToe.clear_board)
layout.addWidget(button_box)
def set_state(self, new_state):
self._ticTacToe.setState(new_state)
def state(self):
return self._ticTacToe.state
class TicTacToeTaskMenu(QPyDesignerTaskMenuExtension):
def __init__(self, ticTacToe, parent):
super().__init__(parent)
self._ticTacToe = ticTacToe
self._edit_state_action = QAction('Edit State...', None)
self._edit_state_action.triggered.connect(self._edit_state)
def taskActions(self):
return [self._edit_state_action]
def preferredEditAction(self):
return self._edit_state_action
@Slot()
def _edit_state(self):
dialog = TicTacToeDialog(self._ticTacToe)
dialog.set_state(self._ticTacToe.state)
if dialog.exec() == QDialog.DialogCode.Accepted:
self._ticTacToe.state = dialog.state()
class TicTacToeTaskMenuFactory(QExtensionFactory):
def __init__(self, extension_manager):
super().__init__(extension_manager)
@staticmethod
def task_menu_iid():
return 'org.qt-project.Qt.Designer.TaskMenu'
def createExtension(self, object, iid, parent):
if iid != TicTacToeTaskMenuFactory.task_menu_iid():
return None
if object.__class__.__name__ != 'TicTacToe':
return None
return TicTacToeTaskMenu(object, parent)