added versioning, requirements and setup

png-meta-editor.py

@@ -1,4 +1,3 @@
-
 import tkinter as tk
 from tkinter import ttk, filedialog, messagebox
 from pathlib import Path
@@ -6,10 +5,14 @@ import json
 from PIL import Image
 from PIL.PngImagePlugin import PngInfo
 
+# Application metadata
+APP_VERSION = "1.0.0"
+APP_NAME = "PNG Metadata Editor"
+
 class PNGMetadataEditor:
     def __init__(self, root):
         self.root = root
-        self.root.title("PNG Metadata Editor")
+        self.root.title(f"{APP_NAME} - No file loaded")
         self.root.geometry("900x700")
 
         self.current_file = None
@@ -32,6 +35,7 @@ class PNGMetadataEditor:
 
         ttk.Button(top_frame, text="Open PNG File", command=self.open_file).pack(side=tk.LEFT, padx=5)
         ttk.Button(top_frame, text="Save Changes", command=self.save_changes).pack(side=tk.LEFT, padx=5)
+        ttk.Button(top_frame, text="About", command=self.show_about).pack(side=tk.RIGHT, padx=5)  # New About button
 
         self.file_label = ttk.Label(top_frame, text="No file loaded", foreground="gray")
         self.file_label.pack(side=tk.LEFT, padx=20)
@@ -52,7 +56,7 @@ class PNGMetadataEditor:
         tree_scroll = ttk.Scrollbar(tree_frame)
         tree_scroll.pack(side=tk.RIGHT, fill=tk.Y)
 
-        self.tree = ttk.Treeview(tree_frame, columns=("Key", "Value"), show="headings", 
+        self.tree = ttk.Treeview(tree_frame, columns=("Key", "Value"), show="headings",
                                   yscrollcommand=tree_scroll.set)
         self.tree.heading("Key", text="Key")
         self.tree.heading("Value", text="Value Preview")
@@ -98,6 +102,19 @@ class PNGMetadataEditor:
         self.status_label = ttk.Label(status_frame, text="Ready", padding=(10, 5))
         self.status_label.pack(side=tk.LEFT, fill=tk.X, expand=True)
 
+    def show_about(self):
+        """Show application about dialog"""
+        about_text = f"{APP_NAME} v{APP_VERSION}\n\n" \
+                     "A graphical tool for viewing and editing metadata in PNG files.\n\n" \
+                     "Author: Robert Tusa\n" \
+                     "License: MIT"
+
+        messagebox.showinfo(
+            f"About {APP_NAME}",
+            about_text,
+            parent=self.root
+        )
+
     def set_status(self, message, duration=3000, color=""):
         """Set status bar message that auto-clears after duration (ms)"""
         # Cancel any existing timer
@@ -126,7 +143,7 @@ class PNGMetadataEditor:
 
     def update_title(self):
         """Update window title with unsaved indicator"""
-        base_title = "PNG Metadata Editor"
+        base_title = f"{APP_NAME} v{APP_VERSION}"
         if self.current_file:
             filename = Path(self.current_file).name
             if self.has_unsaved_changes:
@@ -243,7 +260,7 @@ class PNGMetadataEditor:
         value_scroll = ttk.Scrollbar(text_frame)
         value_scroll.pack(side=tk.RIGHT, fill=tk.Y)
 
-        value_text = tk.Text(text_frame, wrap=tk.WORD, yscrollcommand=value_scroll.set, 
+        value_text = tk.Text(text_frame, wrap=tk.WORD, yscrollcommand=value_scroll.set,
                             font=("Menlo", 11))
         value_text.pack(side=tk.LEFT, fill=tk.BOTH, expand=True)
         value_scroll.config(command=value_text.yview)
@@ -387,4 +404,4 @@ class PNGMetadataEditor:
 if __name__ == "__main__":
     root = tk.Tk()
     app = PNGMetadataEditor(root)
-    root.mainloop()
+    root.mainloop()