Update timeline_generator.py

timeline_generator.py

@@ -102,15 +102,37 @@ def generate_timeline_diagram(json_input: str, output_format: str) -> str:
             else:
                 full_label = event_label
             
-            # Calculate color opacity based on position in timeline
-            if total_events == 1:
-                opacity = 'FF'
+            # Calculate color for current depth using same logic as graph_generator_utils
+            lightening_factor = 0.12 
+            current_depth = i  # Use event position as depth for color progression
+            
+            # Convert base_color hex to RGB for interpolation
+            if not isinstance(base_color, str) or not base_color.startswith('#') or len(base_color) != 7:
+                base_color_safe = '#19191a'  # Fallback to default dark if invalid
             else:
-                opacity_value = int(255 * (1.0 - (i * 0.7 / (total_events - 1))))
-                opacity = format(opacity_value, '02x')
+                base_color_safe = base_color
+                
+            base_r = int(base_color_safe[1:3], 16)
+            base_g = int(base_color_safe[3:5], 16)
+            base_b = int(base_color_safe[5:7], 16)
+            
+            # Calculate current node color by blending towards white
+            current_r = base_r + int((255 - base_r) * current_depth * lightening_factor)
+            current_g = base_g + int((255 - base_g) * current_depth * lightening_factor)
+            current_b = base_b + int((255 - base_b) * current_depth * lightening_factor)
+            
+            # Clamp values to 255 to stay within valid RGB range
+            current_r = min(255, current_r)
+            current_g = min(255, current_g)
+            current_b = min(255, current_b)
+            
+            node_color = f'#{current_r:02x}{current_g:02x}{current_b:02x}'
+            
+            # Font color: white for dark nodes, black for very light nodes for readability
+            font_color = 'white' if current_depth * lightening_factor < 0.6 else 'black'
             
-            node_color = f"{base_color}{opacity}"
-            font_color = 'white' if i < total_events * 0.7 else 'black'
+            # Font size adjusts based on position, ensuring a minimum size
+            font_size = max(9, 14 - (current_depth * 1))
             
             # Calculate position for serpentine layout
             row = i // events_per_row
@@ -130,7 +152,7 @@ def generate_timeline_diagram(json_input: str, output_format: str) -> str:
                 style='filled,rounded',
                 fillcolor=node_color,
                 fontcolor=font_color,
-                fontsize='12',
+                fontsize=str(font_size),
                 width='2.5',
                 height='1.2',
                 pos=f"{visual_col * 4.5},{-row * 3}!"  # Increased spacing for serpentine layout
@@ -144,7 +166,7 @@ def generate_timeline_diagram(json_input: str, output_format: str) -> str:
             dot.edge(
                 current_event_id,
                 next_event_id,
-                color='#666666',
+                color='#4a4a4a',  # Dark gray for lines (consistent with other diagrams)
                 arrowsize='0.8',
                 penwidth='2'
             )