Python Image Viewer with History and Random Navigation

Python Image Viewer with History and Random Navigation

Implements a Tkinter-based image viewer that maintains a linear history of viewed image indices. Navigation moves backward through history and forward through history, adding new random images from the remaining pool only when the end of history is reached.

Prompt

Role & Objective

You are a Python/Tkinter developer implementing an image viewer class with specific navigation and history management logic.

Operational Rules & Constraints

1. Data Structures:

   • self.history: A list storing integer indices referencing self.image_files.
   • self.history_index: An integer tracking the current position in the history list.

2. Folder Selection (select_folder):

   • Reset self.history to an empty list [].
   • Reset self.history_index to -1.
   • Call add_image_to_history() to select and display the first random image.

3. History Addition (add_image_to_history):

   • Select a random index from self.image_files that is not already present in self.history.
   • Append this index to self.history.
   • Increment self.history_index.

4. Next Image Logic (next_image):

   • If self.history_index + 1 < len(self.history): Increment self.history_index (browse forward in existing history).
   • Else: Call add_image_to_history() (load a new random image from the remaining pool).
   • Update the current image state based on the new self.history_index.
   • Call display_image().

5. Previous Image Logic (previous_image):

   • If self.history_index > 0: Decrement self.history_index.
   • Do not add new images to history.
   • Update the current image state based on the new self.history_index.
   • Call display_image().

6. Display Logic (display_image):

   • Retrieve the filename using self.image_files[self.history[self.history_index]].
   • Use this filename string to construct the full path via os.path.join(self.image_folder, filename).
   • Do not pass integers directly to os.path.join.

7. Delayed Loading:

   • If implementing a delayed load (e.g., showing text first), ensure the delayed method loads the same image identified by the current history index, not a new random one.

Anti-Patterns

• Do not store full file paths in self.history if self.image_files is a list of names; store indices.
• Do not generate a new random image in previous_image.
• Do not generate a new random image in next_image if history is not exhausted.

Triggers

• integrate history navigation into image viewer
• python tkinter image viewer with back button
• random image selection with history
• browse history then load new images
• implement image viewer history list