import sys
from PyQt5.QtWidgets import (QApplication, QMainWindow, QWidget, QVBoxLayout, QHBoxLayout,
QLabel, QLineEdit, QPushButton, QDateEdit, QTableWidget,
QTableWidgetItem, QHeaderView, QDialog, QFormLayout, QComboBox,
QMessageBox, QSpinBox, QAction, QFileDialog, QMenuBar, QTextEdit,
QAbstractItemView, QToolButton)
from PyQt5.QtWidgets import QStyle
from PyQt5.QtCore import Qt, QDate, QLocale
from PyQt5.QtGui import QFont, QFontDatabase
from datetime import datetime, timedelta
from dateutil.relativedelta import relativedelta
from calendar_manager import CalendarManager
from date_calculator import DateCalculator
from prediction_controller import PredictionController
from event_type_handler import EventTypeHandler
from date_service import DateService
from config import EventConfig
class EventDialog(QDialog):
def __init__(self, entry=None, parent=None):
super().__init__(parent)
self.entry = entry
self.dateformat = EventConfig.DATE_FORMAT
# Set title based on mode
self.setWindowTitle("Neuer Eintrag" if not entry else "Eintrag editieren")
self.init_ui()
def init_ui(self):
layout = QFormLayout()
# Apply Arial font
font = QFont("Arial", 12)
self.setFont(font)
self.setStyleSheet(
"QDialog { background: #ffffff; }"
" QLabel { color: #333; }"
" QLineEdit, QDateEdit, QComboBox, QTextEdit, QSpinBox {"
" background: #fafbfe; color: #333; border: 1px solid #e1e4ee;"
" border-radius: 6px; padding: 6px; }"
" QDateEdit::drop-down, QComboBox::drop-down { border: none; }"
" QPushButton { background: #2f6feb; color: #fff; border: none;"
" border-radius: 6px; padding: 8px 12px; }"
" QPushButton:hover { background: #316de0; }"
" QPushButton:pressed { background: #2a5fcc; }"
)
# Start date selector
self.start_date = QDateEdit()
self.start_date.setCalendarPopup(True)
self.start_date.setFont(font)
self.start_date.setDisplayFormat(self.dateformat)
# Set initial date based on mode
if self.entry:
entry_start = QDate(self.entry.start_date.year,
self.entry.start_date.month,
self.entry.start_date.day)
self.start_date.setDate(entry_start)
else:
self.start_date.setDate(QDate.currentDate())
# Connect start date change to validate end date
self.start_date.dateChanged.connect(self.validate_end_date)
layout.addRow("Startdatum:", self.start_date)
# End date selector
self.end_date = QDateEdit()
self.end_date.setCalendarPopup(True)
self.end_date.setFont(font)
self.end_date.setDisplayFormat(self.dateformat)
# Set initial date based on mode
if self.entry:
entry_end = QDate(self.entry.end_date.year,
self.entry.end_date.month,
self.entry.end_date.day)
self.end_date.setDate(entry_end)
else:
self.end_date.setDate(QDate.currentDate().addDays(1))
layout.addRow("Enddatum:", self.end_date)
# Keyword selector
self.keyword = QComboBox()
self.keyword.setFont(font)
self.keyword.addItems(EventConfig.KEYWORDS)
# Set initial keyword based on mode
if self.entry and self.entry.keyword in EventConfig.KEYWORDS:
current_index = EventConfig.KEYWORDS.index(self.entry.keyword)
self.keyword.setCurrentIndex(current_index)
self.keyword.currentTextChanged.connect(self.on_keyword_changed)
layout.addRow("Art:", self.keyword)
# Commentary input
self.commentary_input = QTextEdit()
self.commentary_input.setFont(font)
self.commentary_input.setFixedHeight(80)
if self.entry and hasattr(self.entry, 'commentary') and self.entry.commentary:
self.commentary_input.setPlainText(self.entry.commentary)
layout.addRow("Kommentar:", self.commentary_input)
# Store layout for later access
self.layout = layout
self.end_date_row = 1 # Index of end date row in the form layout
# Buttons
button_layout = QHBoxLayout()
self.save_button = QPushButton("Speichern")
self.save_button.setFont(font)
self.save_button.setIcon(self.style().standardIcon(QStyle.SP_DialogApplyButton))
self.save_button.clicked.connect(self.accept)
self.cancel_button = QPushButton("Abbrechen")
self.cancel_button.setFont(font)
self.cancel_button.setIcon(self.style().standardIcon(QStyle.SP_DialogCancelButton))
self.cancel_button.clicked.connect(self.reject)
button_layout.addWidget(self.save_button)
button_layout.addWidget(self.cancel_button)
layout.addRow("", button_layout)
self.setLayout(layout)
# Connect end date change to validate start date (keep range consistent both ways)
self.end_date.dateChanged.connect(self.validate_start_date)
# Handle initial keyword selection
self.on_keyword_changed(self.keyword.currentText())
def on_keyword_changed(self, keyword):
"""Handle visibility of the end_date field based on keyword"""
# Get the widgets from the form layout
end_date_label = self.layout.itemAt(self.end_date_row, QFormLayout.LabelRole).widget()
end_date_field = self.layout.itemAt(self.end_date_row, QFormLayout.FieldRole).widget()
if EventTypeHandler.should_hide_end_date_input(keyword):
# Hide end date field for EZ pauschals since they have fixed duration
end_date_label.setVisible(False)
end_date_field.setVisible(False)
# Update end date automatically if changing to EZ pauschal
start_dt = self.start_date.date().toPyDate()
end_dt = EventTypeHandler.get_duration_for_type(keyword, start_dt)
self.end_date.setDate(QDate(end_dt.year, end_dt.month, end_dt.day))
else:
# Show end date field for other event types
end_date_label.setVisible(True)
end_date_field.setVisible(True)
def validate_end_date(self):
"""Ensure end date is not before start date"""
if self.end_date.date() < self.start_date.date():
self.end_date.setDate(self.start_date.date())
def validate_start_date(self):
"""Ensure start date is not after end date when end changes"""
if self.start_date.date() > self.end_date.date():
self.start_date.setDate(self.end_date.date())
def get_data(self):
start_date = DateService.format_date_for_iso(self.start_date.date())
keyword = self.keyword.currentText()
commentary = self.commentary_input.toPlainText().strip()
if EventTypeHandler.should_hide_end_date_input(keyword):
# For EZ pauschals, calculate end date automatically
start_dt = DateService.parse_date_from_string(start_date)
end_dt = EventTypeHandler.get_duration_for_type(keyword, start_dt)
end_date = DateService.format_date_for_iso(end_dt)
else:
end_date = DateService.format_date_for_iso(self.end_date.date())
return start_date, end_date, keyword, commentary
class CalendarManagerGUI(QMainWindow):
def __init__(self):
super().__init__()
self.setWindowTitle("Ausfallzeitenrechner")
self.setMinimumSize(800, 600)
# Set application font
self.app_font = QFont("Arial", 12)
QApplication.setFont(self.app_font)
# Get system locale for consistent date formatting
self.locale = QLocale.system()
self.dateformat = EventConfig.DATE_FORMAT
# Initialize backend components
self.calendar_manager = CalendarManager()
self.date_calculator = DateCalculator()
self.prediction_controller = PredictionController(
self.calendar_manager,
self.date_calculator
)
self.init_ui()
self.create_menus()
def create_menus(self):
# Create menu bar
menubar = self.menuBar()
menubar.setFont(self.app_font)
menubar.setStyleSheet(
"QMenuBar { background: #ffffff; color: #333; }"
" QMenuBar::item:selected { background: #f0f3fa; }"
" QMenu { background: #ffffff; color: #333; border: 1px solid #e1e4ee; }"
" QMenu::item:selected { background: #e6f0ff; }"
)
# File menu
file_menu = menubar.addMenu('Start')
# Save action
save_action = QAction('Speichern', self)
save_action.setShortcut('Ctrl+S')
save_action.setIcon(self.style().standardIcon(QStyle.SP_DialogSaveButton))
save_action.triggered.connect(self.save_file)
file_menu.addAction(save_action)
# Load action
load_action = QAction('Laden', self)
load_action.setShortcut('Ctrl+L')
load_action.setIcon(self.style().standardIcon(QStyle.SP_DialogOpenButton))
load_action.triggered.connect(self.load_file)
file_menu.addAction(load_action)
# Note: Saving/Loading now operate on complete prediction state
# Clear action
clear_action = QAction('Einträge löschen', self)
clear_action.setShortcut('Ctrl+N')
clear_action.setIcon(self.style().standardIcon(QStyle.SP_DialogResetButton))
clear_action.triggered.connect(self.clear_entries)
file_menu.addAction(clear_action)
# Exit action
exit_action = QAction('Beenden', self)
exit_action.setShortcut('Ctrl+Q')
exit_action.setIcon(self.style().standardIcon(QStyle.SP_DialogCloseButton))
exit_action.triggered.connect(self.close)
file_menu.addAction(exit_action)
def init_ui(self):
central_widget = QWidget()
main_layout = QVBoxLayout()
main_layout.setContentsMargins(16, 16, 16, 16)
main_layout.setSpacing(14)
# Global light style for consistency
self.setStyleSheet(
"QMainWindow { background: #ffffff; }"
" QLabel { color: #333; }"
" QLineEdit, QDateEdit, QComboBox, QTextEdit, QSpinBox {"
" background: #fafbfe; color: #333; border: 1px solid #e1e4ee;"
" border-radius: 6px; padding: 6px; }"
" QDateEdit::drop-down, QComboBox::drop-down { border: none; }"
" QPushButton { background: #2f6feb; color: #fff; border: none;"
" border-radius: 6px; padding: 8px 12px; }"
" QPushButton:hover { background: #316de0; }"
" QPushButton:pressed { background: #2a5fcc; }"
" QToolButton { border: none; }"
)
top_layout = QHBoxLayout()
top_layout.setSpacing(18)
# Launch date input
launch_date_layout = QVBoxLayout()
launch_date_label = QLabel("Promotionsdatum:")
launch_date_label.setFont(self.app_font)
self.launch_date_edit = QDateEdit()
self.launch_date_edit.setFont(self.app_font)
self.launch_date_edit.setCalendarPopup(True) # Enable calendar popup
self.launch_date_edit.setDate(QDate.currentDate())
self.launch_date_edit.setDisplayFormat(self.dateformat)
self.launch_date_edit.dateChanged.connect(self.update_prediction) # Auto-update on change
launch_date_layout.addWidget(launch_date_label)
launch_date_layout.addWidget(self.launch_date_edit)
top_layout.addLayout(launch_date_layout)
# Duration input
duration_layout = QVBoxLayout()
duration_label = QLabel("Bewerbungszeitraum (Jahre):")
duration_label.setFont(self.app_font)
self.duration_spin = QSpinBox()
self.duration_spin.setFont(self.app_font)
self.duration_spin.setRange(1, 99)
self.duration_spin.setValue(1)
self.duration_spin.valueChanged.connect(self.update_prediction) # Auto-update on change
duration_layout.addWidget(duration_label)
duration_layout.addWidget(self.duration_spin)
top_layout.addLayout(duration_layout)
# Prediction result
prediction_result_layout = QVBoxLayout()
prediction_result_label = QLabel("Bewerbungsfrist:")
prediction_result_label.setFont(self.app_font)
self.prediction_result = QDateEdit()
self.prediction_result.setFont(self.app_font)
self.prediction_result.setReadOnly(True)
self.prediction_result.setButtonSymbols(QDateEdit.ButtonSymbols.NoButtons)
self.prediction_result.setDisplayFormat(self.dateformat)
self.prediction_result.setStyleSheet(
"QDateEdit { background: #f5faf5; border: 1px solid #cfe8cf; color: #1e4620; }"
)
prediction_result_layout.addWidget(prediction_result_label)
prediction_result_layout.addWidget(self.prediction_result)
top_layout.addLayout(prediction_result_layout)
main_layout.addLayout(top_layout)
# Events section
events_layout = QVBoxLayout()
events_title = QLabel("
Ausfallzeiten
")
events_title.setFont(self.app_font)
events_layout.addWidget(events_title)
# Add event button (modern with icon)
add_event_button = QPushButton("Eintrag hinzufügen")
add_event_button.setFont(self.app_font)
add_event_button.setIcon(self.style().standardIcon(QStyle.SP_FileDialogNewFolder))
add_event_button.setStyleSheet("QPushButton { border-radius: 6px; padding: 6px 10px; }")
add_event_button.clicked.connect(self.add_event)
events_layout.addWidget(add_event_button)
# Events table
self.events_table = QTableWidget()
self.events_table.setFont(self.app_font)
self.events_table.setColumnCount(7) # ID (hidden), Start, End, Keyword, RelevantTime, Commentary, Actions
self.events_table.setHorizontalHeaderLabels(["ID", "Anfangsdatum", "Enddatum", "Art", "Anger. Zeit", "Kommentar", "Aktionen"])
self.events_table.horizontalHeader().setSectionResizeMode(QHeaderView.Stretch)
self.events_table.horizontalHeader().setFont(self.app_font)
self.events_table.setColumnHidden(0, True) # Hide ID column
# Table visual tweaks for a modern look
self.events_table.setAlternatingRowColors(True)
self.events_table.setSelectionBehavior(QAbstractItemView.SelectRows)
self.events_table.setSelectionMode(QAbstractItemView.SingleSelection)
self.events_table.setStyleSheet(
"QHeaderView::section { background: #f5f7fb; color: #333; border: none;"
" border-bottom: 1px solid #e6e8ef; padding: 8px; }"
" QTableWidget { gridline-color: #e6e8ef; }"
" QTableView::item { padding: 6px; color: #333; }"
" QTableView::item:selected { background: #e6f0ff; color: #333; }"
" QTableView::item:hover { background: #f4f7ff; color: #333; }"
)
# Wrap long text and auto-resize rows so comments are readable
self.events_table.setWordWrap(True)
self.events_table.verticalHeader().setSectionResizeMode(QHeaderView.ResizeToContents)
# Enable inline editing on double click / Enter; keep computed column read-only in population step
self._suppress_item_changed = False
self.events_table.setEditTriggers(
QAbstractItemView.DoubleClicked | QAbstractItemView.SelectedClicked | QAbstractItemView.EditKeyPressed
)
self.events_table.itemChanged.connect(self.on_events_item_changed)
events_layout.addWidget(self.events_table)
main_layout.addLayout(events_layout)
# Set main layout
central_widget.setLayout(main_layout)
self.setCentralWidget(central_widget)
# Load initial data
self.update_events_table()
self.update_prediction() # Calculate initial prediction
def update_prediction(self):
"""Update prediction whenever needed"""
try:
launch_date = self.launch_date_edit.date().toString("yyyy-MM-dd")
duration_years = self.duration_spin.value()
self.prediction_controller.make_prediction(launch_date, duration_years)
prediction_date = self.prediction_controller.get_prediction()
if prediction_date:
self.prediction_result.setDate(prediction_date)
# Update table to show corrected dates
self.update_events_table()
except Exception as e:
self.prediction_result.setText("Error in calculation")
print(f"Error calculating prediction: {str(e)}")
def add_event(self):
dialog = EventDialog(parent=self)
if dialog.exec_():
start_date, end_date, keyword, commentary = dialog.get_data()
try:
# Validate data before adding
errors = self.calendar_manager.validate_entry_data(start_date, end_date, keyword)
if errors:
QMessageBox.warning(self, "Validation Error", "\n".join(errors))
return
self.calendar_manager.add_entry(start_date, end_date, keyword, commentary)
self.update_events_table()
self.update_prediction() # Auto-update prediction
except Exception as e:
QMessageBox.critical(self, "Error", f"Error adding event: {str(e)}")
def modify_event(self, event_id):
entry = self.calendar_manager.get_entry_by_id(event_id)
if entry:
dialog = EventDialog(entry=entry, parent=self)
if dialog.exec_():
start_date, end_date, keyword, commentary = dialog.get_data()
try:
# Validate data before modifying
errors = self.calendar_manager.validate_entry_data(start_date, end_date, keyword)
if errors:
QMessageBox.warning(self, "Validation Error", "\n".join(errors))
return
self.calendar_manager.modify_entry(event_id, start_date, end_date, keyword, commentary)
self.update_events_table()
self.update_prediction() # Auto-update prediction
except Exception as e:
QMessageBox.critical(self, "Error", f"Error modifying event: {str(e)}")
def delete_event(self, event_id):
reply = QMessageBox.question(self, "Eintrag löschen",
"Wollen Sie diesen Eintrag löschen?",
QMessageBox.Yes | QMessageBox.No)
if reply == QMessageBox.Yes:
try:
self.calendar_manager.delete_entry(event_id)
self.update_events_table()
self.update_prediction() # Auto-update prediction
except Exception as e:
QMessageBox.critical(self, "Error", f"Error deleting event: {str(e)}")
def update_events_table(self):
# Clear table
self._suppress_item_changed = True
try:
self.events_table.setRowCount(0)
# Add entries to table
entries = self.calendar_manager.list_entries()
for i, entry in enumerate(entries):
self.events_table.insertRow(i)
# Set item data
self.events_table.setItem(i, 0, QTableWidgetItem(entry.id))
# Format dates using unified display format
start_date_text = DateService.format_date_for_display(entry.start_date, self.dateformat)
end_date_text = DateService.format_date_for_display(entry.end_date, self.dateformat)
self.events_table.setItem(i, 1, QTableWidgetItem(start_date_text))
self.events_table.setItem(i, 2, QTableWidgetItem(end_date_text))
# Keyword as dropdown (combobox) for safer selection
keyword_combo = QComboBox()
keyword_combo.setFont(self.app_font)
keyword_combo.addItems(EventConfig.KEYWORDS)
if entry.keyword in EventConfig.KEYWORDS:
keyword_combo.setCurrentIndex(EventConfig.KEYWORDS.index(entry.keyword))
keyword_combo.currentTextChanged.connect(lambda new_kw, eid=entry.id: self.on_keyword_changed_in_table(eid, new_kw))
self.events_table.setCellWidget(i, 3, keyword_combo)
# Relevant accounted time from stored time_period
relevant_text = getattr(entry, 'time_period', "") or ""
relevant_item = QTableWidgetItem(relevant_text)
# Make computed column read-only
relevant_item.setFlags(relevant_item.flags() & ~Qt.ItemIsEditable)
self.events_table.setItem(i, 4, relevant_item)
# Commentary
commentary_text = getattr(entry, 'commentary', "") or ""
commentary_item = QTableWidgetItem(commentary_text)
self.events_table.setItem(i, 5, commentary_item)
# Action buttons
actions_widget = QWidget()
actions_layout = QHBoxLayout()
actions_layout.setContentsMargins(0, 0, 0, 0)
# Modern icon-only tool buttons
modify_button = QToolButton()
modify_button.setAutoRaise(True)
modify_button.setIcon(self.style().standardIcon(QStyle.SP_FileDialogDetailedView))
modify_button.setToolTip("Eintrag bearbeiten")
modify_button.setFixedSize(28, 24)
delete_button = QToolButton()
delete_button.setAutoRaise(True)
delete_button.setIcon(self.style().standardIcon(QStyle.SP_TrashIcon))
delete_button.setToolTip("Eintrag löschen")
delete_button.setFixedSize(28, 24)
# Use lambda with default argument to capture the correct event_id
modify_button.clicked.connect(lambda checked, eid=entry.id: self.modify_event(eid))
delete_button.clicked.connect(lambda checked, eid=entry.id: self.delete_event(eid))
actions_layout.addWidget(modify_button)
actions_layout.addWidget(delete_button)
actions_widget.setLayout(actions_layout)
self.events_table.setCellWidget(i, 6, actions_widget)
# Adjust row heights after population to show wrapped text
self.events_table.resizeRowsToContents()
finally:
self._suppress_item_changed = False
def on_events_item_changed(self, item):
# Avoid reacting to programmatic changes
if self._suppress_item_changed:
return
row = item.row()
col = item.column()
# Ignore non-editable/computed/action columns
if col in (0, 4, 6):
return
# Retrieve entry id
id_item = self.events_table.item(row, 0)
if id_item is None:
return
event_id = id_item.text()
# Collect current row values
start_text = self.events_table.item(row, 1).text() if self.events_table.item(row, 1) else ""
end_text = self.events_table.item(row, 2).text() if self.events_table.item(row, 2) else ""
# Keyword comes from the combobox cell widget
keyword_widget = self.events_table.cellWidget(row, 3)
keyword_text = keyword_widget.currentText() if isinstance(keyword_widget, QComboBox) else (self.events_table.item(row, 3).text() if self.events_table.item(row, 3) else "")
commentary_text = self.events_table.item(row, 5).text() if self.events_table.item(row, 5) else ""
# Normalize to ISO strings for backend
try:
start_iso = DateService.format_date_for_iso(DateService.parse_date_from_string(start_text)) if start_text else None
end_iso = DateService.format_date_for_iso(DateService.parse_date_from_string(end_text)) if end_text else None
except Exception as e:
QMessageBox.warning(self, "Ungültiges Datum", f"Bitte ein gültiges Datum eingeben.\nFehler: {str(e)}")
# Revert table to backend values
self.update_events_table()
return
# Validate before applying
errors = []
if start_iso and end_iso:
errors = self.calendar_manager.validate_entry_data(start_iso, end_iso, keyword_text)
if errors:
QMessageBox.warning(self, "Validierungsfehler", "\n".join(errors))
self.update_events_table()
return
# Apply modification
modified = self.calendar_manager.modify_entry(
event_id,
start_date=start_iso if start_iso else None,
end_date=end_iso if end_iso else None,
keyword=keyword_text if keyword_text else None,
commentary=commentary_text if commentary_text is not None else None,
)
if modified is None:
QMessageBox.critical(self, "Fehler", "Eintrag konnte nicht aktualisiert werden.")
self.update_events_table()
return
# Refresh to reflect normalized display and recomputed values
self.update_events_table()
self.update_prediction()
def on_keyword_changed_in_table(self, event_id, new_keyword):
# Validate using current start/end from the entry
entry = self.calendar_manager.get_entry_by_id(event_id)
if not entry:
return
start_iso = DateService.format_date_for_iso(entry.start_date)
end_iso = DateService.format_date_for_iso(entry.end_date)
errors = self.calendar_manager.validate_entry_data(start_iso, end_iso, new_keyword)
if errors:
QMessageBox.warning(self, "Validierungsfehler", "\n".join(errors))
# Re-render to revert combo to valid value
self.update_events_table()
return
modified = self.calendar_manager.modify_entry(event_id, keyword=new_keyword)
if modified is None:
QMessageBox.critical(self, "Fehler", "Eintrag konnte nicht aktualisiert werden.")
self.update_events_table()
return
self.update_events_table()
self.update_prediction()
def save_file(self):
"""Save the complete prediction state to a .prediction.json file"""
file_path, _ = QFileDialog.getSaveFileName(
self,
"Zustand speichern",
"",
"Prediction State (*.prediction.json)"
)
if not file_path:
return
try:
if self.prediction_controller.save_complete_state(file_path):
target = file_path if file_path.endswith('.prediction.json') else file_path + '.prediction.json'
QMessageBox.information(self, "Speichern erfolgreich", f"Komplettzustand gespeichert in {target}")
else:
QMessageBox.critical(self, "Error", "Speichern des Komplettzustands fehlgeschlagen")
except Exception as e:
QMessageBox.critical(self, "Error", f"Fehler beim Speichern des Komplettzustands: {str(e)}")
def load_file(self):
"""Load the complete prediction state from a .prediction.json file"""
file_path, _ = QFileDialog.getOpenFileName(
self,
"Zustand laden",
"",
"Prediction State (*.prediction.json)"
)
if not file_path:
return
try:
success = self.prediction_controller.load_complete_state(file_path)
if success:
# Reflect restored parameters into UI
launch_dt = self.prediction_controller.get_launch_date()
duration = self.prediction_controller.get_duration()
if launch_dt:
self.launch_date_edit.setDate(launch_dt)
if duration is not None and hasattr(duration, 'years'):
self.duration_spin.setValue(max(1, duration.years))
# Update views
self.update_events_table()
prediction_date = self.prediction_controller.get_prediction()
if prediction_date:
self.prediction_result.setDate(prediction_date)
QMessageBox.information(self, "Laden erfolgreich", f"Komplettzustand von {file_path} geladen")
else:
QMessageBox.warning(self, "Warnung", "Komplettzustand konnte nicht geladen werden")
except Exception as e:
QMessageBox.critical(self, "Error", f"Fehler beim Laden des Komplettzustands: {str(e)}")
def clear_entries(self):
"""Clear all calendar entries"""
reply = QMessageBox.question(self, "Einträge löschen",
"Alle Einträge löschen?",
QMessageBox.Yes | QMessageBox.No)
if reply == QMessageBox.Yes:
try:
self.calendar_manager.clear_entries()
self.update_events_table()
self.update_prediction() # Auto-update prediction
QMessageBox.information(self, "Erfolg", "Alle Einträge gelöscht!")
except Exception as e:
QMessageBox.critical(self, "Error", f"Failed to clear calendar: {str(e)}")
def main():
app = QApplication(sys.argv)
app.setStyle('Fusion')
# Ensure Arial is available
QFontDatabase.addApplicationFont("Arial")
window = CalendarManagerGUI()
window.show()
sys.exit(app.exec_())
if __name__ == "__main__":
main()