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Fix: prevent browser zoom on touchpad pinch #1335

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Fix: prevent browser zoom on touchpad pinch #1335

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22 changes: 21 additions & 1 deletion src/components/svg-wrapper.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -98,11 +98,30 @@ const SvgWrapper = () => {
isOpen: false,
position: { x: 0, y: 0 },
});

// background moving related
const [offset, setOffset] = React.useState({ x: 0, y: 0 }); // pos relative to the viewport
const [svgViewBoxMinTmp, setSvgViewBoxMinTmp] = React.useState({ x: 0, y: 0 }); // temp copy of svgViewBoxMin

// prevent browser zoom when ctrl + wheel or cmd + wheel
const svgRef = React.useRef<SVGSVGElement>(null);

React.useEffect(() => {
const svgInfo = svgRef.current;
if (!svgInfo) return;

const preventBrowserZoom = (e: WheelEvent) => {
if (e.ctrlKey || e.metaKey) {
e.preventDefault();
}
};

svgInfo.addEventListener('wheel', preventBrowserZoom, { passive: false });
return () => {
svgInfo.removeEventListener('wheel', preventBrowserZoom);
};
}, []);

const handleBackgroundDown = useEvent(async (e: React.PointerEvent<SVGSVGElement>) => {
if (contextMenu.isOpen) {
// close context menu if it's open
Expand Down Expand Up @@ -386,6 +405,7 @@ const SvgWrapper = () => {
viewBox={`${svgViewBoxMin.x} ${svgViewBoxMin.y} ${(width * svgViewBoxZoom) / 100} ${
(height * svgViewBoxZoom) / 100
}`}
ref={svgRef}
onPointerDown={handleBackgroundDown}
onPointerMove={handleBackgroundMove}
onPointerUp={handleBackgroundUp}
Expand Down