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fix(image-zoom): disable dragging during single touch interactions

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- Updated logic to prevent dragging when a single touch is detected, improving tap detection accuracy.
- Adjusted event handling to ensure significant movement cancels tap only when necessary, enhancing user experience.
This commit is contained in:
Xin
2025-09-11 23:30:38 +01:00
parent be49fe6f57
commit 6fc6391d06
1 changed files with 5 additions and 15 deletions
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20
assets/js/image-zoom.js
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@@ -99,8 +99,7 @@
}); });
if (pointers.size === 1) { if (pointers.size === 1) {
// Single touch - start drag isDragging = false;
isDragging = true;
setInteracting(true); setInteracting(true);
gestureState.lastPanX = gestureState.panX; gestureState.lastPanX = gestureState.panX;
gestureState.lastPanY = gestureState.panY; gestureState.lastPanY = gestureState.panY;
@@ -166,21 +165,12 @@
// Any multi-touch movement cancels tap // Any multi-touch movement cancels tap
tapCandidate = false; tapCandidate = false;
applyTransform(); applyTransform();
} else if (isDragging && pointers.size === 1) { } else if (pointers.size === 1) {
// Handle drag/pan // Single pointer: no drag; only cancel tap if large move
const deltaX = pointer.x - pointer.startX;
const deltaY = pointer.y - pointer.startY;
gestureState.panX = gestureState.lastPanX + deltaX;
gestureState.panY = gestureState.lastPanY + deltaY;
// Significant movement cancels tap
const moveThreshold = 10; const moveThreshold = 10;
if (Math.abs(pointer.x - tapStartX) > moveThreshold || Math.abs(pointer.y - tapStartY) > moveThreshold) { if (Math.abs(pointer.x - tapStartX) > moveThreshold || Math.abs(pointer.y - tapStartY) > moveThreshold) {
tapCandidate = false; tapCandidate = false;
} }
applyTransform();
} }
} }
@@ -204,9 +194,9 @@
}, 300); }, 300);
} }
} else if (pointers.size === 1) { } else if (pointers.size === 1) {
// Going from pinch to single touch // Going from pinch to single touch — keep dragging disabled
isPinching = false; isPinching = false;
isDragging = true; isDragging = false;
const remaining = Array.from(pointers.values())[0]; const remaining = Array.from(pointers.values())[0];
gestureState.lastPanX = gestureState.panX; gestureState.lastPanX = gestureState.panX;
gestureState.lastPanY = gestureState.panY; gestureState.lastPanY = gestureState.panY;