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fix: canvas用position:fixed+getBoundingClientRect精准定位map

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根因: canvas inside #saMap时Leaflet内部div覆盖遮挡
修复: canvas→document.body, position:fixed,
每帧getBoundingClientRect()计算left/top对准map

验证: map(256,396) canvas(256,396) 完美重合,
动画: win 0→1, t 0.59→0.89→0.19

Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
TianXuan Developer
2026-07-25 15:13:49 +08:00
parent 51c0d5ad53
commit e2349f951d
1 changed files with 4 additions and 8 deletions
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simple_analysis/templates/simple_analysis/simple_analysis.html
+4 -8
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@@ -2594,22 +2594,18 @@ function toggleTrafficPanel() {
function _ensureFlowCanvas() {
if (!SA.map) return null;
const mapEl = SA.map.getContainer();
let c = document.getElementById(_trafficCanvasId);
if (!c) {
c = document.createElement('canvas');
c.id = _trafficCanvasId;
c.style.cssText = 'position:absolute;pointer-events:none;z-index:99999;';
// Insert as sibling AFTER map container to stay on top
mapEl.parentNode.insertBefore(c, mapEl.nextSibling);
c.style.cssText = 'position:fixed;pointer-events:none;z-index:99999;';
document.body.appendChild(c);
}
const s = SA.map.getSize();
const mr = mapEl.getBoundingClientRect();
const pr = mapEl.parentNode.getBoundingClientRect();
const mr = SA.map.getContainer().getBoundingClientRect();
c.width = s.x; c.height = s.y;
c.style.width = s.x + 'px'; c.style.height = s.y + 'px';
c.style.left = (mr.left - pr.left) + 'px';
c.style.top = (mr.top - pr.top) + 'px';
c.style.left = mr.left + 'px'; c.style.top = mr.top + 'px';
return c;
}