change to MVC pattern

app/controller.py

@@ -0,0 +1,26 @@
+# controller.py
+
+import tkinter as tk
+from model import FoodSearch
+from view import AppView
+
+class AppController:
+    def __init__(self, master):
+        self.master = master
+        self.food_search = FoodSearch('food_data.db')
+        self.view = AppView(master, self)
+
+    def search(self, query):
+        results = self.food_search.search(query)
+        self.view.update_results(results)
+
+    def clear_results(self):
+        self.view.clear_results()
+
+    def on_item_selected(self, event):
+        widget = event.widget
+        selection = widget.curselection()
+        if selection:
+            index = selection[0]
+            value = widget.get(index)
+            self.view.show_image(value)

app/model.py

@@ -0,0 +1,13 @@
+import sqlite3
+
+class FoodSearch:
+    def __init__(self, db_path):
+        self.conn = sqlite3.connect(db_path)
+        self.cursor = self.conn.cursor()
+        
+    def search(self, user_input) -> list:
+        query = f"SELECT * FROM food_data WHERE product_name LIKE '%{user_input}%'"
+        self.cursor.execute(query)
+        results = self.cursor.fetchall()
+        
+        return results

app/view.py

@@ -0,0 +1,81 @@
+import tkinter as tk
+import requests
+import io
+from PIL import Image, ImageTk
+
+class AppView:
+    def __init__(self, master, controller):
+        self.master = master
+        self.controller = controller
+
+        self.search_var = tk.StringVar()
+        self.search_var.trace('w', self.search_callback)
+
+        self.search_entry = tk.Entry(self.master, textvariable=self.search_var)
+        self.search_entry.grid(row=0, column=0, padx=10, pady=10)
+
+        self.search_button = tk.Button(self.master, text="Search", command=self.search_callback)
+        self.search_button.grid(row=1, column=0, padx=10, pady=10)
+
+        self.results_frame = tk.Frame(self.master)
+        self.results_frame.grid(row=2, column=0, padx=10, pady=10, sticky="nsew")
+
+        self.scrollbar = tk.Scrollbar(self.results_frame)
+        self.scrollbar.pack(side=tk.RIGHT, fill=tk.Y)
+
+        self.results_listbox = tk.Listbox(self.results_frame, yscrollcommand=self.scrollbar.set)
+        self.results_listbox.pack(side=tk.LEFT, fill=tk.BOTH, expand=True)
+
+        self.scrollbar.config(command=self.results_listbox.yview)
+
+        self.selected_item = None
+
+        self.image_frame = tk.Frame(self.master, bg='white')
+        self.image_frame.grid(row=0, column=2, rowspan=3, padx=10, pady=10, sticky="nsew")
+
+        self.master.columnconfigure(0, weight=1)
+        self.master.columnconfigure(1, weight=0)
+        self.master.columnconfigure(2, weight=1)
+        self.master.rowconfigure(2, weight=1)
+
+        self.results_listbox.bind('<<ListboxSelect>>', self.on_item_selected)
+
+    def search_callback(self, *args):
+        query = self.search_var.get()
+        self.controller.search(query)
+
+    def update_results(self, results):
+        self.results_listbox.delete(0, tk.END)
+        for result in results:
+            self.results_listbox.insert(tk.END, result[1])
+
+    def clear_results(self):
+        self.results_listbox.delete(0, tk.END)
+
+    def on_item_selected(self, event):
+        self.controller.on_item_selected(event)
+
+    def show_image(self, item):
+        image_url = None
+        for result in self.food_search.search(self.search_var.get()):
+            if result[1] == item:
+                image_url = result[13]
+                break
+
+        if not image_url:
+            return
+
+        response = requests.get(image_url)
+        img_data = response.content
+        img = Image.open(io.BytesIO(img_data))
+        img = img.resize((300, 300), Image.ANTIALIAS)
+        img_tk = ImageTk.PhotoImage(img)
+
+        # remove old image label widget
+        for widget in self.image_frame.winfo_children():
+            widget.destroy()
+
+        self.image_frame.configure(bg='white')
+        label = tk.Label(self.image_frame, image=img_tk, bg='white')
+        label.image = img_tk
+        label.pack(fill=tk.BOTH, expand=True)

main.py

@@ -0,0 +1,11 @@
+import tkinter as tk
+from app.controller import Controller
+from app.model import Model
+from app.view import View
+
+if __name__ == '__main__':
+    root = tk.Tk()
+    model = Model()
+    view = View(root)
+    controller = Controller(model, view)
+    root.mainloop()