Override settings window overhaul + allow WebP to be previewed

Spritesheet/Animation settings override windows should now be much cleaner and easier to use.

Now also allowing overriding some additional settings.

GIF preview is now "Animation prevew" as we support WebP to be previewed now as well.
APNG preview is not available due to it acting extremely weird when I tried doing it.

Author: MeguminBOT

src/Main.py

@@ -25,7 +25,7 @@
 from gui.help_window import HelpWindow
 from gui.find_replace_window import FindReplaceWindow
 from gui.override_settings_window import OverrideSettingsWindow
-from gui.gif_preview_window import GifPreviewWindow
+from gui.animation_preview_window import AnimationPreviewWindow
 from gui.settings_window import SettingsWindow
 from gui.tooltip import Tooltip
 from gui.unknown_atlas_warning_window import UnknownAtlasWarningWindow
@@ -136,8 +136,8 @@ class TextureAtlasExtractorApp:
         on_double_click_animation(evt): Handles the event when an animation is double-clicked in the listbox.
         show_listbox_png_menu(event): Shows the context menu for the PNG listbox.
         delete_selected_spritesheet(): Deletes the selected spritesheet and related settings.
-        preview_gif_window(...): Generates and displays a preview GIF.
-        show_gif_preview_window(gif_path, settings): Displays the preview GIF in a new window.
+        preview_animation_window(...): Generates and displays a preview animation.
+        show_animation_preview_window(animation_path, settings): Displays the preview animation in a new window.
         store_input(...): Stores the input from the override settings window.
         update_global_settings(): Updates the global settings from the GUI.
         on_closing(): Handles the event when the application is closing.
@@ -681,10 +681,11 @@ def delete_selected_spritesheet(self):
             for anim in anims_to_delete:
                 self.settings_manager.delete_animation_settings(anim)
 
-    def preview_gif_window(
+    def preview_animation_window(
         self,
         name,
         settings_type,
+        animation_format_entry,
         fps_entry,
         delay_entry,
         period_entry,
@@ -693,10 +694,11 @@ def preview_gif_window(
         indices_entry,
         frames_entry,
     ):
-        GifPreviewWindow.preview(
+        AnimationPreviewWindow.preview(
             self,
             name,
             settings_type,
+            animation_format_entry,
             fps_entry,
             delay_entry,
             period_entry,
@@ -706,14 +708,15 @@ def preview_gif_window(
             frames_entry,
         )
 
-    def show_gif_preview_window(self, gif_path, settings):
-        GifPreviewWindow.show(gif_path, settings)
+    def show_animation_preview_window(self, animation_path, settings):
+        AnimationPreviewWindow.show(animation_path, settings)
 
     def store_input(
         self,
         window,
         name,
         settings_type,
+        animation_format_entry,
         fps_entry,
         delay_entry,
         period_entry,
@@ -727,6 +730,8 @@ def store_input(
     ):
         settings = {}
         try:
+            if animation_format_entry and animation_format_entry.get() != "":
+                settings["animation_format"] = animation_format_entry.get()
             if fps_entry.get() != "":
                 settings["fps"] = float(fps_entry.get())
             if delay_entry.get() != "":

src/core/extractor.py

@@ -36,10 +36,8 @@ class Extractor:
             Returns early without processing if the user cancels background color detection dialogs.
         extract_sprites(atlas_path, metadata_path, output_dir, settings):
             Extracts sprites from a given atlas and metadata file, and processes the animations.
-        extract_preview_gif_frames(atlas_path, metadata_path, settings, animation_name=None):
-            Extracts frames for a single animation for preview purposes.
-        generate_temp_gif_for_preview(atlas_path, metadata_path, settings, animation_name=None, temp_dir=None):
-            Generates a temporary GIF file using the actual AnimationExporter.save_gif logic.
+        generate_temp_animation_for_preview(atlas_path, metadata_path, settings, animation_name=None, temp_dir=None):
+            Generates a temporary animated image file for preview purposes.
     """
 
     def __init__(self, progress_bar, current_version, settings_manager, app_config=None):
@@ -181,7 +179,7 @@ def extract_sprites(self, atlas_path, metadata_path, output_dir, settings, paren
         except Exception as e:
             ExceptionHandler.handle_exception(e, metadata_path if metadata_path else atlas_path, sprites_failed)
 
-    def generate_temp_gif_for_preview(self, atlas_path, metadata_path, settings, animation_name=None, temp_dir=None):
+    def generate_temp_animation_for_preview(self, atlas_path, metadata_path, settings, animation_name=None, temp_dir=None):
         try:
             atlas_processor = AtlasProcessor(atlas_path, metadata_path)
             sprite_processor = SpriteProcessor(atlas_processor.atlas, atlas_processor.sprites)
@@ -215,7 +213,11 @@ def generate_temp_gif_for_preview(self, atlas_path, metadata_path, settings, ani
                     spritesheet_name, f"{spritesheet_name}/{anim_name}"
                 )
                 merged_settings = {**preview_settings, **settings}
-                merged_settings["animation_format"] = "GIF"
+
+                animation_format = merged_settings.get("animation_format", "GIF")
+                if animation_format == "None":
+                    animation_format = "GIF"
+                merged_settings["animation_format"] = animation_format
 
                 indices = merged_settings.get("indices")
                 if indices:
@@ -236,13 +238,20 @@ def generate_temp_gif_for_preview(self, atlas_path, metadata_path, settings, ani
                     image_tuples, spritesheet_name, anim_name, merged_settings
                 )
 
+                file_extensions = {
+                    "GIF": ".gif",
+                    "WebP": ".webp", 
+                    "APNG": ".png"
+                }
+                target_extension = file_extensions.get(animation_format, ".gif")
+
                 for file in os.listdir(temp_dir):
-                    if file.endswith(".gif"):
+                    if file.endswith(target_extension):
                         return os.path.join(temp_dir, file)
             return None
 
         except Exception as e:
-            print(f"Preview GIF generation error: {e}")
+            print(f"Preview animation generation error: {e}")
             return None
 
     def _handle_unknown_spritesheets_background_detection(self, input_dir, spritesheet_list, tk_root):