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# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
import sys
from PySide6.QtCore import QMargins, Qt, Slot, QSize
from PySide6.QtGui import QPainter
from PySide6.QtWidgets import (QAction, QApplication, QHeaderView, QHBoxLayout, QLabel, QLineEdit,
QMainWindow, QPushButton, QTableWidget, QTableWidgetItem,
QVBoxLayout, QWidget)
from PySide6.QtCharts import QtCharts
from __feature__ import snake_case, true_property
class Widget(QWidget):
def __init__(self):
QWidget.__init__(self)
self.items = 0
# Example data
self._data = {"Water": 24.5, "Electricity": 55.1, "Rent": 850.0,
"Supermarket": 230.4, "Internet": 29.99, "Bars": 21.85,
"Public transportation": 60.0, "Coffee": 22.45, "Restaurants": 120}
# Left
self.table = QTableWidget()
self.table.column_count = 2
self.table.horizontal_header_labels = ["Description", "Price"]
self.table.horizontal_header().section_resize_mode = QHeaderView.Stretch
# Chart
self.chart_view = QtCharts.QChartView()
self.chart_view.render_hint = QPainter.Antialiasing
# Right
self.description = QLineEdit()
self.price = QLineEdit()
self.add = QPushButton("Add")
self.clear = QPushButton("Clear")
self.quit = QPushButton("Quit")
self.plot = QPushButton("Plot")
# Disabling 'Add' button
self.add.enabled = False
self.right = QVBoxLayout()
self.right.contents_margins = QMargins(10, 10, 10, 10)
self.right.add_widget(QLabel("Description"))
self.right.add_widget(self.description)
self.right.add_widget(QLabel("Price"))
self.right.add_widget(self.price)
self.right.add_widget(self.add)
self.right.add_widget(self.plot)
self.right.add_widget(self.chart_view)
self.right.add_widget(self.clear)
self.right.add_widget(self.quit)
# QWidget Layout
self.layout = QHBoxLayout()
#self.table_view.setSizePolicy(size)
self.layout.add_widget(self.table)
self.layout.add_layout(self.right)
# Set the layout to the QWidget
self.set_layout(self.layout)
# Signals and Slots
self.add.clicked.connect(self.add_element)
self.quit.clicked.connect(self.quit_application)
self.plot.clicked.connect(self.plot_data)
self.clear.clicked.connect(self.clear_table)
self.description.textChanged[str].connect(self.check_disable)
self.price.textChanged[str].connect(self.check_disable)
# Fill example data
self.fill_table()
@Slot()
def add_element(self):
des = self.description.text
price = self.price.text
try:
price_item = QTableWidgetItem(f"{float(price):.2f}")
price_item.text_alignment = Qt.AlignRight
self.table.insert_row(self.items)
description_item = QTableWidgetItem(des)
self.table.set_item(self.items, 0, description_item)
self.table.set_item(self.items, 1, price_item)
self.description.text = ""
self.price.text = ""
self.items += 1
except ValueError:
print("Wrong price", price)
@Slot()
def check_disable(self, s):
if not self.description.text or not self.price.text:
self.add.enabled = False
else:
self.add.enabled = True
@Slot()
def plot_data(self):
# Get table information
series = QtCharts.QPieSeries()
for i in range(self.table.row_count):
text = self.table.item(i, 0).text()
number = float(self.table.item(i, 1).text())
series.append(text, number)
chart = QtCharts.QChart()
chart.add_series(series)
chart.legend().alignment = Qt.AlignLeft
self.chart_view.set_chart(chart)
@Slot()
def quit_application(self):
QApplication.quit()
def fill_table(self, data=None):
data = self._data if not data else data
for desc, price in data.items():
description_item = QTableWidgetItem(desc)
price_item = QTableWidgetItem(f"{price:.2f}")
price_item.text_alignment = Qt.AlignRight
self.table.insert_row(self.items)
self.table.set_item(self.items, 0, description_item)
self.table.set_item(self.items, 1, price_item)
self.items += 1
@Slot()
def clear_table(self):
self.table.row_count = 0
self.items = 0
class MainWindow(QMainWindow):
def __init__(self, widget):
QMainWindow.__init__(self)
self.window_title = "Tutorial"
# Menu
self.menu = self.menu_bar()
self.file_menu = self.menu.add_menu("File")
# Exit QAction
exit_action = QAction("Exit", self)
exit_action.shortcut = "Ctrl+Q"
exit_action.triggered.connect(self.exit_app)
self.file_menu.add_action(exit_action)
self.set_central_widget(widget)
@Slot()
def exit_app(self, checked):
QApplication.quit()
if __name__ == "__main__":
# Qt Application
app = QApplication(sys.argv)
# QWidget
widget = Widget()
# QMainWindow using QWidget as central widget
window = MainWindow(widget)
window.size = QSize(800, 600)
window.show()
# Execute application
sys.exit(app.exec())
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