add / subtract paid amount in cash buttons

__main__.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env python3.11
 from customtkinter import set_appearance_mode, set_default_color_theme
-from customtkinter import CTk, CTkEntry, CTkButton, CTkLabel, CTkFrame
+from customtkinter import CTk, CTkEntry, CTkButton, CTkLabel, CTkFrame, CTkSwitch
-from customtkinter import DISABLED
+from currencyButtons import initializeCurrencyButtons
 
 class Window(CTk):
 	def __init__(self):
@@ -19,45 +19,72 @@ class Window(CTk):
 
 		self.amountDue: float = 0.0
 
-		self.left_frame: CTkFrame = CTkFrame(master=self, width=((self.width / 2) - 20), height=(self.height - 40))
+		self.left_frame: CTkFrame = CTkFrame(master=self, width=(self.width / 2 - 20), height=(self.height / 2 - 40), fg_color="gray20")
 		self.left_frame.grid_propagate(False)
-		self.left_frame.grid(row=0, column=0, pady=20, padx=10)
+		self.left_frame.grid(row=0, column=0, pady=20, padx=10, sticky='NW')
 
 		# Static label
-		_mainLabel: CTkLabel = CTkLabel(master=self.left_frame, text="Change Due Calculator")
+		mainLabel: CTkLabel = CTkLabel(master=self.left_frame, text="Change Due Calculator", font=("Arial", 18, 'bold'))
-		_mainLabel.grid(row=0, column=0, pady=12, padx=10)
+		mainLabel.grid(row=0, column=0, pady=12, padx=10)
 
 		charValidation = self.register(self.only_numbers)
 		self.entry: CTkEntry = CTkEntry(
 			master=self.left_frame,
-			placeholder_text="Amount Charged...",
 			width=200,
 			height=40,
 			validate="key",
-			validatecommand=(charValidation, '%d', '%s', '%S')
+			validatecommand=(charValidation, '%d', '%s', '%S'),
+			placeholder_text="Amount Charged..."
 		)
 		self.entry.grid(row=1, column=0, pady=12, padx=10)
+		self.entry.insert(0, 'Amount Charged...')
 
 		# Warning Label
-		self.invalidLabel: CTkLabel = CTkLabel(master=self.left_frame, text="Not a Number!", text_color="red", font=("Arial", 24, 'bold'))
+		self.invalidLabel: CTkLabel = CTkLabel(master=self.left_frame, text="Not a Number!", text_color="red", font=("Arial", 20, 'bold'))
 		
 		calculateButton: CTkButton = CTkButton(master=self.left_frame, text="Calculate", command=self.calculate, width=200, height=50)
 		calculateButton.grid(row=2, column=0, pady=12, padx=10)
 
-		self.right_frame: CTkFrame = CTkFrame(master=self, width=((self.width / 2) - 20), height=(self.height - 40))
+		self.left_frame_bottom: CTkFrame = CTkFrame(master=self, width=(self.width / 2 - 20), height=(self.height / 2 - 40), fg_color="gray20")
+		self.left_frame_bottom.grid_propagate(False)
+		self.left_frame_bottom.grid(row=0, column=0, pady=20, padx=10, sticky='SW')
+
+		paidWithLabel: CTkLabel = CTkLabel(master=self.left_frame_bottom, text="Paid With", font=("Arial", 18, 'bold'))
+		paidWithLabel.grid(row=0, column=0, pady=(16, 0), padx=10)
+
+		self.mode: bool = True # True == ADD, False == SUBTRACT
+		self.modeLabel: CTkLabel = CTkLabel(master=self.left_frame_bottom, text=f"Mode: {'ADD' if self.mode else 'SUBTRACT'}", font=("Arial", 18, 'bold'))
+		self.modeLabel.grid(row=0, column=4, pady=(16, 0), padx=(50, 10), sticky='NE')
+		
+		self.modeSelect: CTkSwitch = CTkSwitch(master=self.left_frame_bottom, text="Mode", command=self.updateMode)
+		self.modeSelect.grid(row=0, column=3, pady=(16, 0), padx=(50, 10), sticky='NE')
+
+		self.total: float = 0.0
+		self.totalLabel: CTkLabel = CTkLabel(master=self.left_frame_bottom, text=f"Total: {self.total}", font=("Arial", 18, 'bold'))
+		self.totalLabel.grid(row=0, column=2, pady=(16, 0), padx=10, sticky='NE')
+
+		currencyButtons: list[CTkButton] = initializeCurrencyButtons(self.left_frame_bottom, self.sum)
+
+		r, c = 1, 0
+		for button in currencyButtons:
+			button.grid(row=r, column=c, pady=12, padx=10)
+			if c < 3: c += 1
+			else: c = 0; r += 1
+
+		self.right_frame: CTkFrame = CTkFrame(master=self, width=(self.width / 2 - 20), height=(self.height - 40), fg_color="gray20")
 		self.right_frame.grid_propagate(False)
 		self.right_frame.grid(row=0, column=1, pady=20, padx=10)
 
-		self.total: float = 0.0
-		self.totalLabel: CTkLabel = CTkLabel(master=self.right_frame, text=f"Total: {self.total}", font=("Arial", 24, 'bold'))
-		self.totalLabel.grid(row=0, column=0, pady=12, padx=10)
-
 		self.mainloop()
 
+	def updateMode(self) -> None:
+		self.mode = not self.mode
+		self.modeLabel.configure(text=f"Mode: {'ADD' if self.mode else 'SUBTRACT'}")
+
 	def quitApplication(self, event=None) -> None: self.destroy()
 
-	def only_numbers(self, action: int, current: str, char: str) -> bool:
+	def only_numbers(self, action: str, current: str, char: str) -> bool:
-		if action == 0: return True # If delete character
+		if int(action) == 0: return True # If delete character
 		if '.' in current and len(current.split('.')[1]) == 2: return False # prevent more than 2 decimal
 		return (char.isdigit() or char == ".") # only allow digits and decimal
 
@@ -77,5 +104,11 @@ class Window(CTk):
 	def calculate(self) -> None:
 		print(self.amountDue)
 
+	def sum(self, value: float) -> None:
+		if self.total == 0 and not self.mode: return
+		self.total += value * (1 if self.mode else -1)
+		if self.total < 0: self.total = 0
+		self.totalLabel.configure(text=f"Total: {self.total:.2f}")
+
 if __name__ == '__main__':
 	window = Window()

currencyButtons.py

@@ -0,0 +1,125 @@
+from customtkinter import CTkButton
+
+def initializeCurrencyButtons(root, cmd) -> list[CTkButton]:
+  return [
+    CTkButton(
+      master=root, 
+      text="$100 Bill", 
+      width=152, 
+      height=70, 
+      font=("Arial", 24, 'bold'), 
+      fg_color="Burlywood3", 
+      hover_color="Burlywood4",
+      command=lambda: cmd(100)
+    ),
+    
+    CTkButton(
+      master=root, 
+      text="$50 Bill", 
+      width=152, 
+      height=70, 
+      font=("Arial", 24, 'bold'), 
+      fg_color="IndianRed3", 
+      hover_color="IndianRed4",
+      command=lambda: cmd(50)
+    ),
+    
+    CTkButton(
+      master=root, 
+      text="$20 Bill", 
+      width=152, 
+      height=70, 
+      font=("Arial", 24, 'bold'), 
+      fg_color="medium sea green", 
+      hover_color="sea green",
+      command=lambda: cmd(20)
+    ),
+    
+    CTkButton(
+      master=root, 
+      text="$10 Bill", 
+      width=152, 
+      height=70, 
+      font=("Arial", 24, 'bold'), 
+      fg_color="MediumPurple3", 
+      hover_color="MediumPurple4",
+      command=lambda: cmd(10)
+    ),
+    
+    CTkButton(
+      master=root, 
+      text="$5 Bill", 
+      width=152, 
+      height=70, 
+      font=("Arial", 24, 'bold'), 
+      fg_color="royal blue", 
+      hover_color="dark slate blue",
+      command=lambda: cmd(5)
+    ),
+
+    CTkButton(
+      master=root, 
+      text="$2 Coin", 
+      width=152, 
+      height=70, 
+      font=("Arial", 24, 'bold'), 
+      fg_color="honeydew4", 
+      hover_color="gray37",
+      command=lambda: cmd(2)
+    ),
+    
+    CTkButton(
+      master=root, 
+      text="$1 Coin",
+      width=152, 
+      height=70, 
+      font=("Arial", 24, 'bold'), 
+      fg_color="lightgoldenrod4", 
+      hover_color="tan4",
+      command=lambda: cmd(1)
+    ),
+
+    CTkButton(
+      master=root, 
+      text="Quarter ($0.25)", 
+      width=152, 
+      height=70, 
+      font=("Arial", 19, 'bold'), 
+      fg_color="honeydew4", 
+      hover_color="gray37",
+      command=lambda: cmd(0.25)
+    ),
+    
+    CTkButton(
+      master=root, 
+      text="Dime ($0.10)", 
+      width=152, 
+      height=70, 
+      font=("Arial", 19, 'bold'), 
+      fg_color="honeydew4", 
+      hover_color="gray37",
+      command=lambda: cmd(0.1)
+    ),
+    
+    CTkButton(
+      master=root, 
+      text="Nickel ($0.05)", 
+      width=152, 
+      height=70, 
+      font=("Arial", 19, 'bold'), 
+      fg_color="honeydew4", 
+      hover_color="gray37",
+      command=lambda: cmd(0.05)
+    ),
+    
+    CTkButton(
+      master=root, 
+      text="Penny ($0.01)", 
+      width=152, 
+      height=70, 
+      font=("Arial", 19, 'bold'), 
+      fg_color="saddle brown", 
+      hover_color="OrangeRed4",
+      command=lambda: cmd(0.01)
+    ),
+  ]