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#!/usr/bin/env python |
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# coding: utf-8 |
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import math |
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import queue |
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import re |
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import sys |
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from PySide6.QtCore import Qt, QByteArray |
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from PySide6.QtGui import QIcon, QPixmap |
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from PySide6.QtWidgets import ( |
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QApplication, |
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QGridLayout, |
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QLayout, |
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QLCDNumber, |
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QPushButton, |
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QSizePolicy, |
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QWidget, |
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) |
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class Calculator(QWidget): |
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# Key Layout |
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keys_info = [ |
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{"label": "Ｃ", "x": 0, "y": 1, "w": 1, "h": 1, "name": "Cls", "method": "on_clear"}, |
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{"label": "√", "x": 1, "y": 1, "w": 1, "h": 1, "name": "Fnc", "method": "on_function"}, |
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{"label": "±", "x": 2, "y": 1, "w": 1, "h": 1, "name": "Fnc", "method": "on_function"}, |
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{"label": "÷", "x": 3, "y": 1, "w": 1, "h": 1, "name": "Ope", "method": "on_operation"}, |
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{"label": "７", "x": 0, "y": 2, "w": 1, "h": 1, "name": "Key", "method": "on_number"}, |
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{"label": "８", "x": 1, "y": 2, "w": 1, "h": 1, "name": "Key", "method": "on_number"}, |
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{"label": "９", "x": 2, "y": 2, "w": 1, "h": 1, "name": "Key", "method": "on_number"}, |
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{"label": "×", "x": 3, "y": 2, "w": 1, "h": 1, "name": "Ope", "method": "on_operation"}, |
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{"label": "４", "x": 0, "y": 3, "w": 1, "h": 1, "name": "Key", "method": "on_number"}, |
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{"label": "５", "x": 1, "y": 3, "w": 1, "h": 1, "name": "Key", "method": "on_number"}, |
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{"label": "６", "x": 2, "y": 3, "w": 1, "h": 1, "name": "Key", "method": "on_number"}, |
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{"label": "−", "x": 3, "y": 3, "w": 1, "h": 1, "name": "Ope", "method": "on_operation"}, |
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{"label": "１", "x": 0, "y": 4, "w": 1, "h": 1, "name": "Key", "method": "on_number"}, |
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{"label": "２", "x": 1, "y": 4, "w": 1, "h": 1, "name": "Key", "method": "on_number"}, |
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{"label": "３", "x": 2, "y": 4, "w": 1, "h": 1, "name": "Key", "method": "on_number"}, |
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{"label": "＋", "x": 3, "y": 4, "w": 1, "h": 2, "name": "Ope", "method": "on_operation"}, |
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{"label": "０", "x": 0, "y": 5, "w": 1, "h": 1, "name": "Key", "method": "on_number"}, |
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{"label": "・", "x": 1, "y": 5, "w": 1, "h": 1, "name": "Key", "method": "on_dot"}, |
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{"label": "＝", "x": 2, "y": 5, "w": 1, "h": 1, "name": "Ope", "method": "on_equal"}, |
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] |
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# max length |
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max_chars = 12 |
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# operation flag |
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flag_dot = False |
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flag_operation = False |
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flag_error = False |
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# register for calculation |
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reg = queue.Queue() |
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# regular expression |
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re1 = re.compile("([\-0-9]+)\.$") |
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re2 = re.compile("([\-0-9]+\.)0$") |
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def __init__(self): |
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super().__init__() |
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self.init_ui() |
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self.setWindowTitle('Calculator') |
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self.setWindowIcon(QIcon(self.get_app_pixmap())) |
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self.setWindowFlags(Qt.WindowMinimizeButtonHint | Qt.WindowCloseButtonHint) |
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def init_ui(self): |
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grid = QGridLayout() |
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grid.setHorizontalSpacing(2) |
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grid.setVerticalSpacing(2) |
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# Reference |
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# https://stackoverflow.com/questions/16673074/how-can-i-fully-disable-resizing-a-window-including-the-resize-icon-when-the-mou |
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grid.setSizeConstraint(QLayout.SetFixedSize) |
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self.setLayout(grid) |
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# This is register |
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self.ent = Register() |
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# This is display value of register |
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self.lcd = QLCDNumber(self) |
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self.lcd.setDigitCount(self.max_chars + 2) |
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self.lcd.setSmallDecimalPoint(True) |
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self.lcd.display(self.ent.get_text()) |
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# self.lcd.setStyleSheet("QLCDNumber {background-color:darkgreen; color:yellow;}") |
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self.lcd.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding) |
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grid.addWidget(self.lcd, 0, 0, 1, 4) |
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grid.setRowMinimumHeight(0, 40) |
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for key in self.keys_info: |
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but = QPushButton(key['label']) |
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method_name = key['method'] |
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method = getattr(self, method_name) |
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but.clicked.connect(method) |
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but.setStyleSheet("QPushButton {font-size:12pt; padding:5px 30px;}") |
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but.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding) |
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grid.addWidget(but, key['y'], key['x'], key['h'], key['w']) |
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def get_app_pixmap(self): |
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base64data = b'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' |
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byte_array = QByteArray.fromBase64(base64data) |
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pixmap = QPixmap() |
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pixmap.loadFromData(byte_array) |
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return pixmap |
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def get_display_string(self, value): |
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""" |
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get_display_string |
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Argument |
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value : value to display |
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Return |
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string to display |
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""" |
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if self.flag_error: |
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return value |
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str_value = str(value) |
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self.ent.set_text(str_value) |
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m = pow(10.0, self.max_chars) |
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value_int = int(value) |
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if abs(value_int) > 0: |
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value_int_length = int(math.log10(abs(value_int))) + 1 |
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if value_int_length < self.max_chars: |
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if abs(value - value_int) < 1 / m: |
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str_value = str(value_int) |
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else: |
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str_value = str(int(value * m) / m) |
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while len(str_value) > self.max_chars: |
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m = m / 10 |
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str_value = str(int(value * m) / m) |
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else: |
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str_value = '{:.3e}'.format(value) |
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else: |
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if value < 1 / m: |
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str_value = '{:.3e}'.format(value) |
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else: |
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str_value = str(int(value * m) / m) |
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result = self.re2.match(str_value) |
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if result: |
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str_value = result.group(1) |
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return str_value |
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return str_value |
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def get_function_result(self, text, value): |
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""" |
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get_function_result |
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Arguments |
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text : function operator |
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value : value of function parameter |
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Return |
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value calculated specified function |
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""" |
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# sign |
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if text == "±": |
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return value * -1 |
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# square root |
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if text == "√": |
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try: |
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return math.sqrt(value) |
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except Exception as e: |
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self.flag_error = True |
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# return e |
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return "Error" |
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def get_operator(self, text): |
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""" |
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get_operator |
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Argument |
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text : label string of calculator key pad |
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Return |
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operator string |
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""" |
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if text == "＋": |
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return "+" |
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if text == "−": |
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return "-" |
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if text == "×": |
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return "*" |
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if text == "÷": |
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return "/" |
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def set_display(self, text): |
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""" |
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set_display |
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Argument |
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text : string to display |
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""" |
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self.lcd.display(text) |
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def zenkaku_to_hankaku(self, text): |
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""" |
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zenkaku_to_hankaku |
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Argument |
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text : zenkaku string |
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Return |
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hankaku (ascii) string |
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""" |
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# ref: https://qiita.com/YuukiMiyoshi/items/6ce77bf402a29a99f1bf |
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return text.translate(str.maketrans({chr(0xFF01 + i): chr(0x21 + i) for i in range(94)})) |
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# ========================================================================= |
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# BINDINGS |
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# ========================================================================= |
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def on_clear(self): |
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""" |
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on_clear |
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""" |
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# display |
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self.ent.init() |
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self.set_display(self.ent.get_text()) |
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# clear flag |
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self.flag_dot = False |
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self.flag_operation = False |
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self.flag_error = False |
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def on_dot(self): |
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""" |
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on_dot |
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""" |
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if self.flag_error: |
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return |
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# flag |
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self.flag_dot = True |
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def on_equal(self): |
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""" |
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on_equal |
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""" |
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if self.flag_error: |
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return |
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expr = "" |
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while not self.reg.empty(): |
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expr += self.reg.get() |
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expr += self.ent.get_text() |
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try: |
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result = eval(expr) |
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except Exception as e: |
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self.flag_error = True |
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# result = e |
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result = "Error" |
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disp_new = self.get_display_string(result) |
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# display |
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self.set_display(disp_new) |
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# flag |
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self.flag_operation = True |
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def on_function(self): |
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""" |
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on_function |
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""" |
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button = self.sender() |
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if self.flag_error: |
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return |
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# get current value displayed |
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value_current = float(self.ent.get_text()) |
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# get string from key label |
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text = button.text() |
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value_new = self.get_function_result(text, value_current) |
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disp_new = self.get_display_string(value_new) |
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# display |
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self.set_display(disp_new) |
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# flag |
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self.flag_operation = True |
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def on_operation(self): |
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""" |
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on_operation |
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""" |
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button = self.sender() |
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if self.flag_error: |
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return |
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# get current string displayed |
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disp_current = self.ent.get_text() |
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self.reg.put(disp_current) |
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# get string from key label |
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text = button.text() |
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self.reg.put(self.get_operator(text)) |
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# flag |
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self.flag_operation = True |
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self.flag_dot = False |
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def on_number(self): |
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""" |
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on_number |
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""" |
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button = self.sender() |
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if self.flag_error: |
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return |
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# get current string displayed |
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disp_current = self.ent.get_text() |
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# get string from key label |
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text = button.text() |
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text_ascii = self.zenkaku_to_hankaku(text) |
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# update string to display |
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if self.flag_operation: |
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disp_new = text_ascii + "." |
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self.flag_operation = False |
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else: |
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if disp_current == "0.": |
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if self.flag_dot: |
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disp_new = disp_current + text_ascii |
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else: |
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disp_new = text_ascii + "." |
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else: |
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# check charcter length (digit) |
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if len(disp_current) > self.max_chars: |
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return |
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if self.flag_dot: |
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disp_new = disp_current + text_ascii |
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else: |
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result = self.re1.match(disp_current) |
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if result: |
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disp_new = result.group(1) + text_ascii + "." |
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else: |
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disp_new = disp_current + text_ascii |
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self.ent.set_text(disp_new) |
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self.set_display(disp_new) |
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class Register(): |
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text = None |
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def __init__(self): |
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self.init() |
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def init(self): |
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self.text = '0.' |
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def get_text(self): |
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return (self.text) |
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def set_text(self, str): |
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self.text = str |
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def main(): |
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app = QApplication(sys.argv) |
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calc = Calculator() |
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calc.show() |
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sys.exit(app.exec()) |
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if __name__ == '__main__': |
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main() |
