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ratio-based swipe gestures #349

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ratio-based swipe gestures #349

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14 changes: 6 additions & 8 deletions step-web/src/main/webapp/js/step.util.js
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Original file line number Diff line number Diff line change
Expand Up @@ -5302,18 +5302,16 @@ step.util = {
return;
var touchendX = touchEvent.changedTouches[0].screenX;
var touchendY = touchEvent.changedTouches[0].screenY;
var minDistance = 40;
var verticalTolerance = 35;
if (step.appleTouchDevice) { // Added these 4 lines for Apple touch devices
minDistance = 50; // Increase the swipe left - right distance
verticalTolerance = 25;
}
var minDistance = 50;
var maxRatio = 0.4; // no more than 20px vertical for every 50px horizontal
var touchDiffY = Math.abs(touchendY - step.touchstartY);
var touchDiffX = touchendX - step.touchstartX;
var absDiffX = Math.abs(touchDiffX)
var distanceRatio = touchDiffY / absDiffX;
step.touchstartX = null;
step.touchstartY = null;
if (touchDiffY < verticalTolerance) {
if (Math.abs(touchDiffX) > minDistance) {
if (distanceRatio < maxRatio) {
if (absDiffX > minDistance) {
if (new Date().getTime() - step.touchstartTime > 400) return; // must be with 400 milliseconds
var activePassage = $(touchEvent.srcElement.closest(".passageContainer"));
if (touchDiffX < 0)
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