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refactor(desktop): collapse overlay zoom-anchor math

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Brooklyn Nicholson 2026-06-26 00:42:19 -05:00
parent 7d1b72a15d
commit bf60bbb6c5
1 changed files with 7 additions and 9 deletions
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16
apps/desktop/src/app/pet-overlay/pet-overlay-app.tsx
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@ -324,20 +324,18 @@ export function PetOverlayApp() {
const anchor = zoomAnchorRef.current
zoomAnchorRef.current = null
// The sprite's bottom-center sits at (curW/2, curH - paddingBottom) and
// scales about that point. Solve for the new window origin that holds either
// the cursor pixel (wheel) or that bottom-center (slider) at a fixed spot.
const dx = anchor ? anchor.clientX - curW / 2 : 0
const dy = anchor ? anchor.clientY - (curH - PET_PADDING_BOTTOM) : 0
// The sprite scales about its bottom-center, at window-local (curW/2,
// curH - paddingBottom). Hold the anchor pixel fixed on screen as it scales;
// with no wheel anchor we pin the bottom-center itself (ratio 1 ⇒ no shift).
const ratio = anchor?.ratio ?? 1
const anchorX = anchor?.clientX ?? curW / 2
const anchorY = anchor?.clientY ?? curH - PET_PADDING_BOTTOM
const ax = anchor?.clientX ?? curW / 2
const ay = anchor?.clientY ?? curH - PET_PADDING_BOTTOM
const bounds = {
height,
width,
x: Math.round(window.screenX + anchorX - dx * ratio - width / 2),
y: Math.round(window.screenY + anchorY - dy * ratio - (height - PET_PADDING_BOTTOM))
x: Math.round(window.screenX + ax - (ax - curW / 2) * ratio - width / 2),
y: Math.round(window.screenY + ay - (ay - (curH - PET_PADDING_BOTTOM)) * ratio - (height - PET_PADDING_BOTTOM))
}
window.hermesDesktop?.petOverlay?.setBounds(bounds)