feat: Improved UI responsiveness during file compression

* Implemented threading for background file compression
* Enabled UI element disabling during compression process

stl_compresser_ui.py

@@ -3,48 +3,85 @@
 from tkinter import filedialog
 from tkinter import ttk
 import trimesh
+import threading
 
 def choose_files(entry_widget):
+    # Function to choose input files
     paths = filedialog.askopenfilenames(filetypes=[("STL files", "*.stl")])
     if paths:
         entry_widget.delete(0, tk.END)
         entry_widget.insert(0, ";".join(paths))
 
 def choose_output_folder(entry_widget):
+    # Function to choose output folder
     path = filedialog.askdirectory()
     if path:
         entry_widget.delete(0, tk.END)
         entry_widget.insert(0, path)
 
-def compress_stl(input_paths, output_path, target_triangles, progress_bar, progress_label):
+def compress_stl(input_paths, output_path, target_triangles, progress_bar, progress_label, on_complete):
+    # Function to compress STL files
     files = input_paths.split(";")
 
     total_files = len(files)
-    for i, file_path in enumerate(files):
-        progress = int((i + 1) / total_files * 100)
-        progress_bar["value"] = progress
-        progress_label["text"] = f"Progress: {i+1}/{total_files} ({progress}%)"
-        window.update_idletasks()
+    progress_per_file = 100 / total_files
 
+    for i, file_path in enumerate(files):
         mesh = trimesh.load_mesh(file_path)
         simplified_mesh = mesh.simplify_quadric_decimation(target_triangles)
         output_file_path = os.path.join(output_path, os.path.basename(file_path))
         simplified_mesh.export(output_file_path)
 
+        # Update progress bar
+        progress = int((i + 1) * progress_per_file)
+        progress_label["text"] = f"Progress: {i + 1}/{total_files} ({progress}%)"
+
+        # Update progress bar and interface after processing each file
+        progress_bar["value"] = progress
+        window.update_idletasks()
+
+    # Call the callback function after compression is complete
+    on_complete()
+
 def compress():
+    # Disable buttons, entry, and slider
+    compress_button.config(state=tk.DISABLED)
+    choose_button.config(state=tk.DISABLED)
+    output_button.config(state=tk.DISABLED)
+    slider.config(state=tk.DISABLED)
+    input_entry.config(state=tk.DISABLED)
+    output_entry.config(state=tk.DISABLED)
+
     input_paths = input_entry.get()
     output_path = output_entry.get()
     target_triangles = int(slider.get())
 
     progress_bar["value"] = 0
     progress_label["text"] = "Progress: 0/0 (0%)"
-    compress_stl(input_paths, output_path, target_triangles, progress_bar, progress_label)
-    progress_bar["value"] = 100
-    progress_label["text"] = "Progress: Complete"
+
+    # Define callback function after compression thread finishes
+    def on_compress_finished():
+        # Enable buttons, entry, and slider
+        compress_button.config(state=tk.NORMAL)
+        choose_button.config(state=tk.NORMAL)
+        output_button.config(state=tk.NORMAL)
+        slider.config(state=tk.NORMAL)
+        input_entry.config(state=tk.NORMAL)
+        output_entry.config(state=tk.NORMAL)
+
+    # Create a thread to perform compression operation
+    compress_thread = threading.Thread(target=compress_stl,
+                                       args=(input_paths, output_path, target_triangles, progress_bar, progress_label,
+                                             on_compress_finished))
+
+    # Start the thread
+    compress_thread.start()
 
 window = tk.Tk()
-window.title("STL Compresser | Made by github@fan-ziqi")
+window.title("STL Compressor v1.1 | Made by github@fan-ziqi")
+window.resizable(False, False)  # Disable resizing
 
+# Input selection
 input_label = tk.Label(window, text="Select Input File(s):")
 input_label.pack()
 input_frame = tk.Frame(window)
@@ -56,6 +93,7 @@ def compress():
 choose_button = tk.Button(input_frame, text="Browse", command=lambda: choose_files(input_entry))
 choose_button.pack(side=tk.LEFT)
 
+# Output selection
 output_label = tk.Label(window, text="Select Output Folder:")
 output_label.pack()
 output_frame = tk.Frame(window)
@@ -67,13 +105,15 @@ def compress():
 output_button = tk.Button(output_frame, text="Browse", command=lambda: choose_output_folder(output_entry))
 output_button.pack(side=tk.LEFT)
 
+# Slider for selecting target triangles
 slider_label = tk.Label(window, text="Select Target Triangles (100-10000):")
 slider_label.pack()
 
 slider = tk.Scale(window, from_=100, to=10000, orient=tk.HORIZONTAL, length=300)
 slider.set(1000)
 slider.pack()
 
+# Progress bar and label
 progress_frame = tk.Frame(window)
 progress_frame.pack()
 
@@ -83,6 +123,7 @@ def compress():
 progress_bar = ttk.Progressbar(progress_frame, length=300, mode='determinate')
 progress_bar.pack()
 
+# Compression button
 compress_button = tk.Button(window, text="Compress", command=compress)
 compress_button.pack()