394 lines
14 KiB
Python
394 lines
14 KiB
Python
import typing
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from functools import partial
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import pandas as pd
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from PyQt6 import uic
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from PyQt6.QtCore import Qt, QSortFilterProxyModel
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from PyQt6.QtGui import QPixmap, QAction
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from PyQt6.QtWidgets import QMainWindow, QPushButton, QHBoxLayout, QLabel, \
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QVBoxLayout, QMenu, QTableView, QInputDialog, QMessageBox, QFileDialog, \
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QListWidget
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from banking_breakdown.ui.pandas_model import PandasModel
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class WarningItem(QHBoxLayout):
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def __init__(self, text: str, parent=None):
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super(WarningItem, self).__init__()
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self._warningIcon = QLabel()
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pixmap = QPixmap("res/warning.png")
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self._warningIcon.setPixmap(pixmap)
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self._label = QLabel(text)
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self._label.setWordWrap(True)
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self.addWidget(self._warningIcon)
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self.addWidget(self._label)
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self.setStretch(0, 0)
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self.setStretch(1, 1)
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def hide(self):
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self._label.hide()
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self._warningIcon.hide()
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class HeaderContextMenu(QMenu):
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def __init__(self, column, pandas_model: PandasModel, callback=None,
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parent=None):
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super(HeaderContextMenu, self).__init__()
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self._column = column
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self._pandas_model = pandas_model
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self._callback = callback
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self._column_text \
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= self._pandas_model.headerData(self._column,
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Qt.Orientation.Horizontal)
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# Define assign action
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assign_menu = QMenu("Assign type", self)
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assign_date_action = QAction("date", self)
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assign_float_action = QAction("float", self)
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assign_menu.addAction(assign_date_action)
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assign_menu.addAction(assign_float_action)
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assign_date_action.triggered.connect(self._assign_date_handler)
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assign_float_action.triggered.connect(self._assign_float_handler)
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# Define other actions
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rename_action = QAction("Rename", self)
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delete_action = QAction("Delete", self)
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switch_action = QAction("Switch position", self)
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rename_action.triggered.connect(self._rename_handler)
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delete_action.triggered.connect(self._delete_handler)
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switch_action.triggered.connect(self._switch_handler)
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# Add actions to menu
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self.addAction(rename_action)
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self.addAction(delete_action)
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self.addAction(switch_action)
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self.addAction(assign_menu.menuAction())
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def _rename_handler(self):
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new_name, flag = QInputDialog.getText(self, "Rename column",
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"New name:",
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text=self._column_text)
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if not flag:
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return
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if (new_name != self._column_text) and (new_name != ''):
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df = self._pandas_model.get_dataframe()
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df = df.rename(columns={self._column_text: new_name})
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self._pandas_model.set_dataframe(df)
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if self._callback:
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self._callback()
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def _delete_handler(self):
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button = QMessageBox.question(self, "Delete column",
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f"Are you sure you want to delete"
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f" column '{self._column_text}'?")
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if button == QMessageBox.StandardButton.Yes:
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df = self._pandas_model.get_dataframe()
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df = df.iloc[:, [j for j, c
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in enumerate(df.columns) if j != self._column]]
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self._pandas_model.set_dataframe(df)
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if self._callback:
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self._callback()
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def _switch_handler(self):
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df = self._pandas_model.get_dataframe()
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columns = [column for column in df.columns
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if column != self._column_text]
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other_name, flag = QInputDialog.getItem(self, "Switch column position",
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f"Switch position of colum"
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f" '{self._column_text}' with:",
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columns, editable=False)
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if not flag:
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return
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column_titles = list(df.columns)
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index1, index2 = column_titles.index(
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self._column_text), column_titles.index(other_name)
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column_titles[index1], column_titles[index2] \
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= column_titles[index2], column_titles[index1]
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df = df.reindex(columns=column_titles)
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self._pandas_model.set_dataframe(df)
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if self._callback:
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self._callback()
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def _assign_date_handler(self):
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date_format, flag = QInputDialog.getText(self, "Format",
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"Format:",
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text="%d.%m.%Y")
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if not flag:
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return
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df = self._pandas_model.get_dataframe()
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try:
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df[self._column_text] \
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= pd.to_datetime(df[self._column_text], format=date_format)
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except:
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QMessageBox.warning(self, "No action performed",
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"An error occurred.")
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self._pandas_model.set_dataframe(df)
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if self._callback:
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self._callback()
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def _assign_float_handler(self):
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chars = ['.', ',']
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decimal_sep, flag = QInputDialog.getItem(self, "Decimal separator",
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"Decimal separator:",
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chars, editable=False)
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if not flag:
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return
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df = self._pandas_model.get_dataframe()
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try:
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if decimal_sep == ',':
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df[self._column_text] \
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= df[self._column_text].str.replace(',', '.').astype(float)
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else:
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df[self._column_text] = df[self._column_text].astype(float)
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except:
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QMessageBox.warning(self, "No action performed",
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"An error occurred.")
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self._pandas_model.set_dataframe(df)
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if self._callback:
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self._callback()
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class MainWindow(QMainWindow):
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def __init__(self):
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super(MainWindow, self).__init__()
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uic.loadUi("res/main_window.ui", self)
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self.setContentsMargins(9, 9, 9, 9)
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self._warnings = []
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# Extract elements
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self._warning_layout \
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= self.findChild(QVBoxLayout, "warningLayout")
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self._create_button \
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= self.findChild(QPushButton, "createCategoryButton")
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self._delete_button \
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= self.findChild(QPushButton, "deleteCategoryButton")
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self._apply_button \
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= self.findChild(QPushButton, "applyCategoryButton")
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self._clear_button \
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= self.findChild(QPushButton, "clearCategoryButton")
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self._list_widget \
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= self.findChild(QListWidget, "categoryListWidget")
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self._table_view \
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= self.findChild(QTableView, "transactionTableView")
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self._action_save \
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= self.findChild(QAction, "actionSave")
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# Set up QTableView model
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self._pandas_model = PandasModel(self)
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self._proxyModel = QSortFilterProxyModel(self)
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self._proxyModel.setSourceModel(self._pandas_model)
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self._table_view.setModel(self._proxyModel)
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self._proxyModel.setDynamicSortFilter(False)
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# Set event handlers
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self._create_button.clicked.connect(self._handle_create_click)
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self._delete_button.clicked.connect(self._handle_delete_click)
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self._clear_button.clicked.connect(self._handle_clear_click)
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self._apply_button.clicked.connect(self._handle_apply_click)
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self._list_widget.itemActivated.connect(self._handle_item_double_click)
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self._action_save.triggered.connect(self._handle_save)
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header = self._table_view.horizontalHeader()
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header.setContextMenuPolicy(Qt.ContextMenuPolicy.CustomContextMenu)
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header.customContextMenuRequested.connect(self._header_right_clicked)
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self._list_widget.itemSelectionChanged.connect(
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self._handle_list_selection_changed)
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self._table_view.selectionModel().selectionChanged.connect(
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self._handle_table_selection_changed)
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def set_statement_data(self, df: pd.DataFrame):
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self._pandas_model.set_dataframe(df)
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self._dataframe_update_callback()
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def get_statement_data(self) -> pd.DataFrame:
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return self._pandas_model.get_dataframe()
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def _dataframe_update_callback(self):
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df = self._pandas_model.get_dataframe()
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self._show_warnings()
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self._update_categories_from_dataframe(df)
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# Resize columns
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if len(df.columns) < 10: # Experimentally determined threshold
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# Properly resize columns (takes longer)
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self._table_view.resizeColumnsToContents()
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else:
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# Quickly approximate sizes
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for i, col in enumerate(df.columns):
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max_char = max(max([len(str(x)) for x in df[col].values]),
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len(col))
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self._table_view.setColumnWidth(i, max_char * 10)
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def _add_categories(self, categories: typing.Sequence[str]):
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for category in categories:
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self._list_widget.addItem(category)
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def _update_categories_from_dataframe(self, df: pd.DataFrame):
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df_categories = df['category'].unique()
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current_categories = [self._list_widget.item(x).text() for x
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in range(self._list_widget.count())]
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missing = list(set(df_categories) - set(current_categories))
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self._add_categories([category for category
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in missing if category != ' '])
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def _add_warning_item(self, text: str):
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warning_item = WarningItem(text=text, parent=self)
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self._warning_layout.addLayout(warning_item)
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self._warnings.append(warning_item)
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def _show_warnings(self):
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for warning_item in self._warnings:
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warning_item.hide()
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self._warning_layout.removeItem(warning_item)
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df = self._pandas_model.get_dataframe()
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if 't' not in df.columns:
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self._add_warning_item(
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"The column 't' does not exist. Please rename the column"
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" containing the dates of the transactions to 't'.")
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if 'value' not in df.columns:
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self._add_warning_item(
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"The column 'value' does not exist. Please rename the column"
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" containing the values of the transactions to 'value'.")
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if 'balance' not in df.columns:
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self._add_warning_item(
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"The column 'balance' does not exist. Please rename the column"
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" containing the balance after each transaction to 'balance'")
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def _header_right_clicked(self, pos):
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column = self._table_view.horizontalHeader().logicalIndexAt(pos)
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context = HeaderContextMenu(parent=self, column=column,
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pandas_model=self._pandas_model,
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callback=self._dataframe_update_callback)
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context.exec(self.sender().mapToGlobal(pos))
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def _handle_create_click(self):
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new_name, flag = QInputDialog.getText(self, "Create category",
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"New category:",
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text="Category")
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if not flag:
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return
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current_items = [self._list_widget.item(x).text() for x
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in range(self._list_widget.count())]
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if new_name not in current_items:
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self._add_categories([new_name])
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else:
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QMessageBox.warning(self, "No action performed",
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f"Category '{new_name}' already exists.")
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def _handle_delete_click(self):
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selected_item = self._list_widget.selectedItems()[0]
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button = QMessageBox.question(self, "Delete category",
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f"Are you sure you want to delete"
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f" category '{selected_item.text()}'?")
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if button == QMessageBox.StandardButton.Yes:
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self._list_widget.takeItem(self._list_widget.row(selected_item))
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df = self.get_statement_data()
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df.loc[df['category'] == selected_item.text(), 'category'] = ' '
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def _handle_clear_click(self):
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self._assign_category(' ')
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def _assign_category(self, category: str):
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indexes = self._table_view.selectionModel().selectedRows()
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row_indices = [self._table_view.model().mapToSource(index).row()
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for index in indexes]
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df = self.get_statement_data()
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df.loc[row_indices, 'category'] = category
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self.set_statement_data(df)
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def _handle_apply_click(self):
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category = self._list_widget.selectedItems()[0].text()
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self._assign_category(category)
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def _handle_item_double_click(self, item):
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self._assign_category(item.text())
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def _handle_save(self):
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filename, _ = QFileDialog.getSaveFileName(self, 'Save File')
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if filename == '':
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return
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df = self.get_statement_data()
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df.to_csv(filename, index=False)
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def _check_enable_delete_button(self):
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if len(self._list_widget.selectedItems()) > 0:
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self._delete_button.setEnabled(True)
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else:
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self._delete_button.setEnabled(False)
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def _check_enable_clear_button(self):
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if len(self._table_view.selectionModel().selectedRows()) > 0:
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self._clear_button.setEnabled(True)
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else:
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self._clear_button.setEnabled(False)
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def _check_enable_apply_button(self):
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if ((len(self._table_view.selectionModel().selectedRows()) > 0)
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and (len(self._list_widget.selectedItems()) > 0)):
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self._apply_button.setEnabled(True)
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else:
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self._apply_button.setEnabled(False)
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def _handle_list_selection_changed(self):
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self._check_enable_delete_button()
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self._check_enable_apply_button()
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def _handle_table_selection_changed(self):
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self._check_enable_clear_button()
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self._check_enable_apply_button()
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