feat(main.py): implement advanced seeking controls and auto-window resizing

main.py

@@ -4,6 +4,7 @@ import glob
 import cv2
 import argparse
 import shutil
+import time
 from pathlib import Path
 from typing import List, Tuple, Optional
 
@@ -20,6 +21,16 @@ class MediaGrader:
         self.current_frame = 0
         self.total_frames = 0
         
+        # Key repeat tracking
+        self.last_key_time = 0
+        self.key_repeat_delay = 0.1  # 100ms between repeats
+        self.last_key = None
+        
+        # Seeking modes
+        self.fine_seek_frames = 1  # Frame-by-frame
+        self.coarse_seek_frames = self.seek_frames  # User-configurable
+        self.fast_seek_frames = self.seek_frames * 5  # 5x the normal seek
+        
         # Supported media extensions
         self.extensions = ['*.png', '*.jpg', '*.jpeg', '*.gif', '*.mp4', '*.avi', '*.mov', '*.mkv']
         
@@ -87,6 +98,29 @@ class MediaGrader:
                 return False, None
             return True, frame
     
+    def auto_resize_window(self, frame):
+        """Auto-resize window to fit media while respecting screen limits"""
+        height, width = frame.shape[:2]
+        
+        # Get screen size (approximate - OpenCV doesn't have direct access)
+        # Use reasonable defaults for common screen sizes
+        max_width = 1200
+        max_height = 800
+        
+        # Calculate scaling factor to fit within max dimensions
+        scale_w = max_width / width if width > max_width else 1.0
+        scale_h = max_height / height if height > max_height else 1.0
+        scale = min(scale_w, scale_h)
+        
+        # Don't scale up small images too much
+        if scale > 2.0:
+            scale = 2.0
+        
+        new_width = int(width * scale)
+        new_height = int(height * scale)
+        
+        cv2.resizeWindow('Media Grader', new_width, new_height)
+    
     def seek_video(self, frames_delta: int):
         """Seek video by specified number of frames"""
         if not self.current_cap or not self.is_video(self.media_files[self.current_index]):
@@ -101,6 +135,42 @@ class MediaGrader:
         self.current_cap.set(cv2.CAP_PROP_POS_FRAMES, new_frame)
         self.current_frame = new_frame
     
+    def handle_seeking_key(self, key: int) -> bool:
+        """Handle seeking keys with different granularities. Returns True if key was handled."""
+        current_time = time.time()
+        
+        # Determine seek amount based on modifier keys and timing
+        seek_amount = 0
+        
+        if key == 81:  # Left arrow
+            # Use different seek amounts based on key repeat pattern
+            if self.last_key == key and (current_time - self.last_key_time) < 0.5:
+                # Fast repeat - use larger seek
+                seek_amount = -self.fast_seek_frames
+            else:
+                # Normal seek
+                seek_amount = -self.coarse_seek_frames
+        elif key == 83:  # Right arrow
+            if self.last_key == key and (current_time - self.last_key_time) < 0.5:
+                seek_amount = self.fast_seek_frames
+            else:
+                seek_amount = self.coarse_seek_frames
+        elif key == ord(','):  # Comma - fine seek backward
+            seek_amount = -self.fine_seek_frames
+        elif key == ord('.'):  # Period - fine seek forward
+            seek_amount = self.fine_seek_frames
+        elif key == ord('['):  # Left bracket - medium seek backward
+            seek_amount = -self.coarse_seek_frames
+        elif key == ord(']'):  # Right bracket - medium seek forward
+            seek_amount = self.coarse_seek_frames
+        else:
+            return False
+        
+        self.seek_video(seek_amount)
+        self.last_key = key
+        self.last_key_time = current_time
+        return True
+    
     def grade_media(self, grade: int):
         """Move current media file to grade directory"""
         if not self.media_files or grade < 1 or grade > 5:
@@ -149,7 +219,9 @@ class MediaGrader:
         print(f"Found {len(self.media_files)} media files")
         print("Controls:")
         print("  Space: Pause/Play")
-        print("  Left/Right: Seek backward/forward")
+        print("  Left/Right: Seek backward/forward (accelerates on repeat)")
+        print("  , / . : Frame-by-frame seek (fine control)")
+        print("  [ / ] : Normal seek (medium control)")
         print("  A/D: Decrease/Increase playback speed")
         print("  1-5: Grade and move file")
         print("  N: Next file")
@@ -169,7 +241,8 @@ class MediaGrader:
             window_title = f"Media Grader - {current_file.name} ({self.current_index + 1}/{len(self.media_files)})"
             cv2.setWindowTitle('Media Grader', window_title)
             
-            delay = int(33 / self.playback_speed) if self.is_video(current_file) else 0
+            delay = int(33 / self.playback_speed) if self.is_video(current_file) else 30
+            window_resized = False
             
             while True:
                 result = self.display_media(current_file)
@@ -178,10 +251,20 @@ class MediaGrader:
                 
                 ret, frame = result
                 
+                # Auto-resize window on first frame
+                if not window_resized:
+                    self.auto_resize_window(frame)
+                    window_resized = True
+                
                 # Add info overlay
                 info_text = f"Speed: {self.playback_speed:.1f}x | Frame: {self.current_frame}/{self.total_frames} | File: {self.current_index + 1}/{len(self.media_files)}"
+                help_text = "Seek: ←→ (accel) ,. (fine) [] (med) | A/D speed | 1-5 grade | Space pause | Q quit"
+                
+                # White background for text visibility
                 cv2.putText(frame, info_text, (10, 30), cv2.FONT_HERSHEY_SIMPLEX, 0.7, (255, 255, 255), 2)
                 cv2.putText(frame, info_text, (10, 30), cv2.FONT_HERSHEY_SIMPLEX, 0.7, (0, 0, 0), 1)
+                cv2.putText(frame, help_text, (10, 60), cv2.FONT_HERSHEY_SIMPLEX, 0.5, (255, 255, 255), 2)
+                cv2.putText(frame, help_text, (10, 60), cv2.FONT_HERSHEY_SIMPLEX, 0.5, (0, 0, 0), 1)
                 
                 cv2.imshow('Media Grader', frame)
                 
@@ -191,19 +274,16 @@ class MediaGrader:
                     return
                 elif key == ord(' '):  # Space - pause/play
                     self.is_playing = not self.is_playing
-                    delay = int(33 / self.playback_speed) if self.is_playing and self.is_video(current_file) else 0
-                elif key == 81 or key == ord('a'):  # Left arrow or A - decrease speed
-                    if key == 81:  # Left arrow - seek backward
-                        self.seek_video(-self.seek_frames)
-                    else:  # A - decrease speed
+                    delay = int(33 / self.playback_speed) if self.is_playing and self.is_video(current_file) else 30
+                elif key == ord('a'):  # A - decrease speed
                     self.playback_speed = max(0.1, self.playback_speed - 0.1)
-                        delay = int(33 / self.playback_speed) if self.is_video(current_file) else 0
-                elif key == 83 or key == ord('d'):  # Right arrow or D
-                    if key == 83:  # Right arrow - seek forward
-                        self.seek_video(self.seek_frames)
-                    else:  # D - increase speed
+                    delay = int(33 / self.playback_speed) if self.is_video(current_file) else 30
+                elif key == ord('d'):  # D - increase speed
                     self.playback_speed = min(5.0, self.playback_speed + 0.1)
-                        delay = int(33 / self.playback_speed) if self.is_video(current_file) else 0
+                    delay = int(33 / self.playback_speed) if self.is_video(current_file) else 30
+                elif self.handle_seeking_key(key):
+                    # Seeking was handled
+                    pass
                 elif key == ord('n'):  # Next file
                     break
                 elif key == ord('p'):  # Previous file