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Merge pull request #853 from TrevorSayre/pixel-scrolling

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ash 2022-04-07 00:21:53 +01:00 committed by GitHub
commit 16267a7562
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1 changed files with 16 additions and 7 deletions
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23
web/_js/main.js
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@ -271,14 +271,23 @@ async function init(){
initialPinchZoom = zoom;
lastPosition = [x, y];
if(e.deltaY > 0){
zoom = zoom / 2;
} else if(e.deltaY < 0){
zoom = zoom * 2;
// Check if we are zooming by pixels
// https://developer.mozilla.org/en-US/docs/Web/API/WheelEvent/deltaMode
if (e.deltaMode === 0) {
// Scale the pixel delta by the current zoom factor
// We want to zoom faster when closer, and slower when further
// This creates a smoother experience
zoom -= e.deltaY * (0.001 * zoom);
} else {
if(e.deltaY > 0){
zoom = zoom / 2;
} else if(e.deltaY < 0){
zoom = zoom * 2;
}
}
zoom = Math.max(minZoom, Math.min(maxZoom, zoom));