Initial commit

Creates the basic project structure and implements the initial version of the calculator.

Author: self-init

calculator/api/calculator.py

@@ -0,0 +1,71 @@
+class Calculator:
+    def __init__(self):
+        self.equation_first = ""
+        self.equation_last = ""
+        self.equation_type = ""
+        self.current_part = "first"
+    
+    def input_button(self, button: str):
+        if button.isdigit():
+            self.add_digit(button)
+        elif button in ["+", "-", "/", "x"]:
+            self.set_operator(button)
+        elif button == "=":
+            if self.current_part == "last":
+                self.solve()
+        elif button == ".":
+            self.add_decimal()
+        elif button == "+/-":
+            self.flip_sign()
+    
+    def add_digit(self, digit):
+        if self.current_part == "first":
+            self.equation_first += digit
+        elif self.current_part == "last":
+            self.equation_last += digit
+
+    def set_operator(self, operator):
+        self.equation_type = operator
+        if self.current_part == "first":
+            self.current_part = "last"
+    
+    def flip_sign(self):
+        if self.current_part == "first":
+            if self.equation_first.startswith("-"):
+                self.equation_first = self.equation_first.removeprefix("-")
+            else:
+                self.equation_first = "-" + self.equation_first
+        elif self.current_part == "last":
+            if self.equation_last.startswith("-"):
+                self.equation_last = self.equation_last.removeprefix("-")
+            else:
+                self.equation_last = "-" + self.equation_last
+    
+    def add_decimal(self):
+        if self.current_part == "first":
+            if not "." in self.equation_first:
+                self.equation_first += "."
+        if self.current_part == "last":
+            if not "." in self.equation_last:
+                self.equation_last += "."
+
+    def solve(self):
+        result = float(self.equation_first)
+        
+        if self.equation_type == "+":
+            result += float(self.equation_last)
+        elif self.equation_type == "-":
+            result -= float(self.equation_last)
+        elif self.equation_type == "/":
+            result /= float(self.equation_last)
+        elif self.equation_type == "x":
+            result *= float(self.equation_last)
+        
+        if result == int(result):
+            self.equation_first = str(int(result))
+        else:
+            self.equation_first = str(result)
+
+        self.equation_last = ""
+        self.equation_type = "" 
+        self.current_part = "first"

calculator/gui/button.py

@@ -0,0 +1,30 @@
+from api import calculator as calc
+import tkinter as tk
+
+LAYOUT_STANDARD = ["AC",  "CE", "%", "/",
+                   "7",   "8",  "9", "x",
+                   "4",   "5",  "6", "-",
+                   "1",   "2",  "3", "+",
+                   "+/-", "0",  ".", "="]
+
+def calc_button(root, calculator: calc.Calculator, display_text): 
+    button = tk.Button(root, text=display_text, command=lambda: calculator.input_button(display_text))
+    return button
+
+class CalculatorButtons:
+    def __init__(self, calculator: calc.Calculator):
+        self.calculator = calculator
+        self.frame = None
+
+    def create_gui(self, root, layout=LAYOUT_STANDARD, width=4):
+        self.frame = tk.Frame(root)
+
+        for i, label in enumerate(layout):
+            button = calc_button(self.frame, self.calculator, label)
+            button.grid(column=i%width, row=int(i/width), sticky=tk.NSEW)
+        
+        for i in range(width):
+            self.frame.grid_columnconfigure(i, uniform="calc_buttons")
+    
+    def update(self):
+        pass

calculator/gui/display.py

@@ -0,0 +1,33 @@
+from api import calculator as calc
+import tkinter as tk
+
+class CalculatorDisplay:
+    def __init__(self, calculator: calc.Calculator):
+        self.calculator = calculator
+        self.frame = None
+        self.upper_entry = None
+        self.lower_entry = None
+    
+    def create_gui(self, root):
+        self.frame = tk.Frame(root)
+        self.upper_entry = tk.Entry(self.frame, state=tk.DISABLED, justify=tk.RIGHT)
+        self.lower_entry = tk.Entry(self.frame, state=tk.DISABLED, justify=tk.RIGHT)
+        self.upper_entry.grid(row=0, sticky=tk.NSEW)
+        self.lower_entry.grid(row=1, sticky=tk.NSEW)
+    
+    def update(self):
+        self.upper_entry.configure(state=tk.NORMAL)
+        self.lower_entry.configure(state=tk.NORMAL)
+
+        self.upper_entry.delete(0,tk.END)
+        self.lower_entry.delete(0,tk.END)
+
+        if self.calculator.current_part == "first":
+            self.lower_entry.insert(0,self.calculator.equation_first)
+        elif self.calculator.current_part == "last":
+            self.upper_entry.insert(0,self.calculator.equation_first + " " + self.calculator.equation_type)
+            self.lower_entry.insert(0,self.calculator.equation_last)
+
+        self.upper_entry.configure(state=tk.DISABLED)
+        self.lower_entry.configure(state=tk.DISABLED)
+

calculator/main.py

@@ -0,0 +1,25 @@
+import tkinter as tk
+from gui import button, display
+from api import calculator as calc
+
+if __name__ == "__main__":
+    c = calc.Calculator()
+    main = tk.Tk()
+    main.title = "Calculator"
+    main.grid_rowconfigure(0, weight=1)
+    main.grid_rowconfigure(1, weight=2)
+    main.grid_columnconfigure(0, weight=1)
+
+    calc_display = display.CalculatorDisplay(c)
+    calc_display.create_gui(main)
+    calc_display.frame.grid(row=0,sticky=tk.NSEW)
+
+    calc_buttons = button.CalculatorButtons(c)
+    calc_buttons.create_gui(main)
+    calc_buttons.frame.grid(row=1,sticky=tk.NSEW)
+    
+    while True:
+        calc_buttons.update()
+        calc_display.update()
+        main.update_idletasks()
+        main.update()