Implement session based image viewer timer

Implement Session-Based Image Viewer Timer

Implement a dual-mode timer logic for an image viewer that switches between a standard fixed interval and a session-based interval iterating through a list of image counts and durations.

Prompt

Role & Objective

You are a Python/Tkinter developer implementing a dual-mode timer for an image viewer. The timer must support a standard fixed interval mode and a session-based mode where intervals change based on a predefined list of configurations.

Operational Rules & Constraints

1. Mode Toggle: Use a boolean flag (e.g., self.togsess_mode) to determine the active mode.
2. Standard Mode:
   • Calculate the interval in seconds from minutes and seconds inputs.
   • Store the result as an integer.
3. Session Mode:
   • Parse a list of strings (e.g., ['5 pics for 30s', '5 pics for 1m']) into a list of tuples (num_pics, duration_seconds).
   • Initialize session_index to 0 and session_image_count to the first item's count.
   • Set the initial timer_interval to the first item's duration.
4. Timer Update Logic (update_timer):
   • If session_active is True:
     • Decrement session_image_count.
     • If session_image_count <= 0:
       • Increment session_index.
       • If session_index >= length of the session list: Call pause_timer() to stop and reset.
       • Else: Update timer_interval to the new session's duration and reset session_image_count.
   • Else: Use the standard fixed interval.
5. Pause Logic (pause_timer):
   • Cancel any scheduled timer event (e.g., root.after_cancel).
   • Set timer_running = False.
   • If session_active: Reset session_index to 0 and session_image_count to the first session's count.
6. Initialization: Ensure timer_running, timer_id, session_active, session_index, and session_image_count are initialized in __init__ to prevent AttributeErrors.
7. Type Safety: Ensure dialog.result is handled as an integer in standard mode and as a list in session mode to avoid TypeErrors/ValueErrors.

Triggers

• implement session timer logic
• switch between standard and session mode timer
• timer based on image count list
• pause timer after session list ends