theme redraw
2
3 - Implemented hover tooltips in `speedGraphSketch.js` to displ
CAN/Ego speeds and timestamps.
4 - Added drag-to-seek (scrubbing) and click-to-seek functionali
using native pointer events for smooth navigation.
5 - Integrated graph seeking with centralized `updateFrame` logi
to ensure consistent video synchronization and UI updates.
6 - Refactored input handling to use DOM listeners on the canvas
resolving conflicts with global p5 events (e.g., play button
issues).
7 - Optimized `theme.js` to redraw only the static graph buffer
theme changes instead of re-processing the entire dataset.
This commit resolves three persistent bugs that were identified during the refactoring of the file parsers and UI modules.
1. Fixed Cache Loading Race Condition
Problem: On page load, the application would try to process cached JSON data immediately. If the cached video file hadn't finished loading its metadata yet, the videoStartDate would be null, causing a getTime of null error in the JSON parser and preventing the visualization from loading.
Solution: The application's startup logic in DOMContentLoaded has been rewritten. A new processAllData function now contains all the data parsing logic. This function is now called exclusively as a callback to the video player's onloadedmetadata event. This guarantees that all data processing (for JSON and CAN logs) only happens after the video is ready and a valid videoStartDate is available.
2. Fixed Speed Graph Theme Not Updating
Problem: The speed graph's background, grid, and data lines are drawn to a static buffer for performance. When the theme was changed, the setTheme function would call .redraw() on the sketch, but this would only re-display the old buffer with the old theme's colors. The buffer itself was not being regenerated.
Solution:
The drawStaticGraphToBuffer function within the speedGraphSketch was made public by attaching it to the p5 instance (p.drawStaticGraphToBuffer).
The setTheme function in src/theme.js was updated to explicitly call this new public function. It now forces the speed graph to generate a new static buffer with the correct theme colors before redrawing.
Imported the videoPlayer element into theme.js to prevent a ReferenceError when checking its properties.
3. Fixed p5.js Canvas Resizing Error
Problem: When the browser window was resized, both p5 sketches would throw a TypeError because the code was attempting to call .resize() on the static graphics buffers (staticBackgroundBuffer and staticBuffer), which is not a valid function.
Solution: The windowResized functions in both sketches were corrected. Instead of trying to resize the existing buffer, the code now creates a brand new, correctly-sized buffer using p.createGraphics() and immediately redraws the static content (axes, gridlines, etc.) onto it.
Refactored the modal and theme-switching functionality out of the main script.
- Created src/modal.js to handle all logic for the confirmation modal.
- Created src/theme.js to manage the dark/light theme and canvas redraws.
- The main script now imports and initializes these modules, cleaning up the global scope.
RUSHIL AMBARISH KADU