Sebastian Krüger 5cf9a69056 feat: complete Phase 3 - Advanced waveform visualization and zoom controls ...

Phase 3 Complete Features:
✅ Drag-to-scrub audio functionality
✅ Horizontal zoom (1x-20x) with smooth scaling
✅ Vertical amplitude zoom (0.5x-5x)
✅ Horizontal scrolling for zoomed waveform
✅ Grid lines every second for time reference
✅ Viewport culling for better performance
✅ Zoom controls UI component

Components Added:
- ZoomControls: Complete zoom control panel with:
  - Horizontal zoom slider and buttons
  - Amplitude zoom slider
  - Zoom in/out buttons
  - Fit to view button
  - Real-time zoom level display

Waveform Enhancements:
- Drag-to-scrub: Click and drag to scrub through audio
- Zoom support: View waveform at different zoom levels
- Scroll support: Navigate through zoomed waveform
- Grid lines: Visual time markers every second
- Viewport culling: Only render visible portions
- Cursor feedback: Grabbing cursor when dragging

AudioEditor Updates:
- Integrated zoom and scroll state management
- Auto-reset zoom on file clear
- Scroll slider appears when zoomed
- Smooth zoom transitions

Technical Improvements:
- Viewport culling: Only render visible waveform portions
- Grid rendering: Time-aligned vertical grid lines
- Smart scroll clamping: Prevent scrolling beyond bounds
- Zoom-aware seeking: Accurate time calculation with zoom
- Performance optimized rendering

Features Working:
✅ Drag waveform to scrub audio
✅ Zoom in up to 20x for detailed editing
✅ Adjust amplitude for better visualization
✅ Scroll through zoomed waveform
✅ Grid lines show time markers
✅ Smooth cursor interactions

Phase 3 Status: 95% complete
- Completed: All major features
- Optional: Measure/beat markers, OffscreenCanvas, Web Workers

Build verified and working ✓

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

2025-11-17 15:44:29 +01:00

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