Add calculator project

python-ofensivo/10_calculadora/calculadora.py

@@ -0,0 +1,184 @@
+#!/usr/bin/env python3
+"""
+Calculadora
+"""
+
+import tkinter as tk
+
+
+class Calculadora:
+    """
+    Clase calculadora
+    """
+
+    def __init__(self, master):
+
+        self.master = master
+        self.display = tk.Entry(
+            master, width=20, font=("Arial", 23), justify="right",
+            bd=10, insertwidth=1, bg="#6495DE"
+        )
+        self.display.grid(row=0, column=0, columnspan=4)
+        self.op_verification = False
+        self.current = ''
+        self.op = ''
+        self.total = 0
+
+        row = 1
+        col = 0
+
+        buttons = [
+            "7", "8", "9", "/",
+            "4", "5", "6", "*",
+            "1", "2", "3", "-",
+            "C", "0", ".", "+",
+            "="
+        ]
+
+        for button in buttons:
+
+            self.build_button(button, row, col)
+
+            col += 1
+
+            if col > 3:
+
+                col = 0
+                row += 1
+
+            if row == 5:
+                col += 2
+
+        self.master.bind("<Key>", self.key_press)
+
+    def key_press(self, event):
+
+        key = event.char
+
+        if key in "0123456789.+-*/":
+
+            self.click(key)
+
+        elif key == "\r":
+
+            self.calculate()
+
+        elif key == "\x08":
+
+            self.clear_display()
+
+        elif key == "\x1b":
+
+            self.master.quit()
+            return
+
+        else:
+
+            print(f"\n[+] Tecla presionada: {key}")
+            print(f"[+] Valor actual: {self.current}")
+            print(f"[+] Verificación de operador: {self.op_verification}")
+            print(f"[+] Operador: {self.op}")
+            print(f"[+] Total: {self.total}")
+
+    def clear_display(self):
+
+        self.display.delete(0, tk.END)
+        self.op_verification = False
+        self.current = ''
+        self.op = ''
+        self.total = 0
+
+    def calculate(self):
+
+        if self.current and self.op:
+
+            if self.op == "+":
+
+                self.total += float(self.current)
+
+            elif self.op == "-":
+
+                self.total -= float(self.current)
+
+            elif self.op == "*":
+
+                self.total *= float(self.current)
+
+            elif self.op == "/":
+
+                self.total /= float(self.current)
+
+            self.display.delete(0, "end")
+            self.display.insert(tk.END, round(self.total, 3))
+
+        return self.total
+
+    def click(self, key):
+
+        if self.op_verification:
+
+            self.op_verification = False
+
+        self.display.insert(tk.END, key)
+
+        if key in "0123456789" or key == ".":
+
+            self.current += key
+
+        else:
+
+            if self.current:
+
+                if not self.op:
+
+                    self.total = float(self.current)
+
+            self.current = ''
+
+            self.op_verification = True
+            self.op = key
+
+        print(f"\n[+] Tecla presionada: {key}")
+        print(f"[+] Valor actual: {self.current}")
+        print(f"[+] Verificación de operador: {self.op_verification}")
+        print(f"[+] Operador: {self.op}")
+        print(f"[+] Total: {self.total}")
+
+    def build_button(self, button, row, col):
+
+        if button == "C":
+
+            b = tk.Button(
+                self.master, text=button,
+                width=3,
+                font=("Arial", 23),
+                command=lambda: self.clear_display()
+            )
+
+        elif button == "=":
+
+            b = tk.Button(
+                self.master, text=button,
+                width=8, height=2,
+                font=("Arial", 23),
+                command=lambda: self.calculate()
+            )
+
+        else:
+
+            b = tk.Button(
+                self.master, text=button,
+                width=3,
+                font=("Arial", 23),
+                command=lambda: self.click(button)
+            )
+
+        b.grid(row=row, column=col, columnspan=2 if row == 5 else 1)
+
+
+root = tk.Tk()
+root.title("Calculadora")
+root.resizable(width=False, height=False)
+my_gui = Calculadora(root)
+
+root.mainloop()