change lay/out, add progress bar/more responsive

app.py

@@ -1,15 +1,18 @@
 import tkinter as tk
+from tkinter import ttk
 import requests
 import io
-from Essential.prepare_db import prepare_db
 from PIL import Image, ImageTk
+from Essential.prepare_db import prepare_db
 from Essential.FoodSearch import FoodSearch
-
+import threading
 
 class App:
     def __init__(self, master):
         self.master = master
 
+        # Search food from database -----------------
+
         try:
             self.food_search = FoodSearch()
         except FileNotFoundError:
@@ -19,39 +22,65 @@ class App:
         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_entry = ttk.Entry(self.master, textvariable=self.search_var)
+        self.search_entry.grid(row=0, column=0, padx=10, pady=10, sticky="nsew")
 
-        self.search_button = tk.Button(self.master, text="Search", command=self.search)
-        self.search_button.grid(row=1, column=0, padx=10, pady=10)
+        self.search_button = ttk.Button(self.master, text="Search", command=self.start_search)
+        self.search_button.grid(row=0, column=1, padx=10, pady=10, sticky="nsew")
 
-        self.results_frame = tk.Frame(self.master)
-        self.results_frame.grid(row=2, column=0, padx=10, pady=10, sticky="nsew")
+        self.results_frame = ttk.Frame(self.master)
+        self.results_frame.grid(row=1, 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.scrollbar = ttk.Scrollbar(self.results_frame)
+        self.scrollbar.grid(row=0, column=2, sticky="ns")
 
         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.results_listbox.grid(row=0, column=0, columnspan=2, sticky="nsew")
 
         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")
+        # Image of food -----------------
+
+        self.image_frame = ttk.Frame(self.master, borderwidth=2, relief=tk.SUNKEN)
+        self.image_frame.grid(row=2, column=0, padx=10, pady=10, sticky="nsew", columnspan=2)
+        self.image_frame.grid_rowconfigure(0, weight=1)
+        self.image_frame.grid_columnconfigure(0, weight=1)
+
+        # Progress bar -----------------
+
+        self.progress_bar = ttk.Progressbar(self.master, mode='indeterminate')
+        self.progress_bar.grid(row=3, column=0, columnspan=2, padx=10, pady=10, sticky="we")
+
+        # Default image (Not Found) -----------------
+
+        self.default_image_path = 'resources/notfound.png'  # Replace with the correct path to your default image
+        self.default_image = ImageTk.PhotoImage(Image.open(self.default_image_path))
+        self.default_image_label = ttk.Label(self.image_frame, image=self.default_image)
+        self.default_image_label.grid(row=0, column=0, 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(1, weight=1)
         self.master.rowconfigure(2, weight=1)
 
+        # Configure the window size and position
+        self.master.geometry("800x600")
+        # self.master.attributes('-fullscreen', True)
+
     def search_callback(self, *args):
         pass
 
+    def start_search(self):
+        # Create a new thread to execute the search function
+        search_thread = threading.Thread(target=self.search)
+        search_thread.start()
+
     def search(self):
         results = self.food_search.search(self.search_var.get())
-        self.update_results(results)
+        # Call the update_results function on the main thread to update the GUI
+        self.master.after(0, self.update_results, results)
 
     def update_results(self, results):
         self.results_listbox.delete(0, tk.END)
@@ -70,6 +99,8 @@ class App:
             self.selected_item = value
             self.show_image(self.selected_item)
 
+    # Image Showing Section -----------------
+
     def show_image(self, item):
         image_url = None
         for result in self.food_search.search(self.search_var.get()):
@@ -78,25 +109,49 @@ class App:
                 break
 
         if not image_url:
+            self.display_default_image()
             return
 
+        threading.Thread(target=self.fetch_and_display_image, args=(image_url,)).start()
+
+    def fetch_and_display_image(self, image_url):
+        self.master.after(0, self.show_progress_bar)
+
+        # Fetch the image
         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
+        self.master.after(0, self.hide_progress_bar)
+
+        self.master.after(0, self.update_image_label, img_tk)
+
+    def show_progress_bar(self):
+        self.progress_bar.start()
+        self.progress_bar.grid(row=3, column=1)
+
+    def hide_progress_bar(self):
+        self.progress_bar.stop()
+        self.progress_bar.pack_forget()
+
+    def display_default_image(self):
+        self.master.after(0, self.update_image_label, self.default_image)
+
+    def update_image_label(self, image):
+        # 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)
+        image_label = tk.Label(self.image_frame, image=image)
+        image_label.image = image
+        image_label.grid(row=0, column=2)
+
+    # ---------------------
+
 root = tk.Tk()
 app = App(root)
-root.geometry("800x400")
 root.title('Food Search')
 app.results_listbox.bind('<<ListboxSelect>>', app.on_item_selected)