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fix: revert TempoTrackLane PADDING_LEFT to 2s, remove DOM scrollLeft hack

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3dtours
2026-07-25 09:37:57 +07:00
parent 186c5353d4
commit dc8b1f59fa
1 changed files with 2 additions and 8 deletions
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app/static/js/app.jsx
+2 -8
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@@ -1206,13 +1206,7 @@ const TempoTrackLane = ({
if (!canvas) return; if (!canvas) return;
const ctx = canvas.getContext('2d'); const ctx = canvas.getContext('2d');
const dpr = window.devicePixelRatio || 1; const dpr = window.devicePixelRatio || 1;
let el = canvas.parentElement; const scrollLeftVal = scrollLeft || 0;
while (el) {
const ox = getComputedStyle(el).overflowX;
if (ox === 'auto' || ox === 'scroll') break;
el = el.parentElement;
}
const scrollLeftVal = el ? el.scrollLeft : (scrollLeft || 0);
const height = canvas.parentElement ? canvas.parentElement.clientHeight : 40; const height = canvas.parentElement ? canvas.parentElement.clientHeight : 40;
canvas.width = Math.min(Math.round(drawWidth * dpr), 32768); canvas.width = Math.min(Math.round(drawWidth * dpr), 32768);
canvas.height = Math.min(Math.round(height * dpr), 32768); canvas.height = Math.min(Math.round(height * dpr), 32768);
@@ -1224,7 +1218,7 @@ const TempoTrackLane = ({
ctx.fillRect(0, 0, drawWidth, height); ctx.fillRect(0, 0, drawWidth, height);
const beatDuration = 60 / bpm; const beatDuration = 60 / bpm;
const barDuration = beatDuration * 4; const barDuration = beatDuration * 4;
const PADDING_LEFT = beatDuration; // 1-beat margin on left const PADDING_LEFT = 2; // seconds of empty space on left edge
const tStart = scrollLeftVal / zoom - PADDING_LEFT; const tStart = scrollLeftVal / zoom - PADDING_LEFT;
const tEnd = (scrollLeftVal + drawWidth) / zoom; const tEnd = (scrollLeftVal + drawWidth) / zoom;
const firstBeat = Math.floor(tStart / beatDuration) * beatDuration; const firstBeat = Math.floor(tStart / beatDuration) * beatDuration;