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gfse: prevent scrolling during drag-and-drop on iOS

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Applies to webkit-based browsers on other touch-based platforms too
This commit is contained in:
Thomas Hallgren
2019-01-21 21:18:01 +01:00
parent 71307d6518
commit a40130ddc4
1 changed files with 7 additions and 0 deletions
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7
src/www/gfse/sort.js
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@@ -132,8 +132,10 @@ function initialize_sorting(tagList,classList) {
elem.style.zIndex=0; elem.style.zIndex=0;
move_element(elem,0,0); move_element(elem,0,0);
setDragHandlers(null,null) setDragHandlers(null,null)
preventScroll=false;
return false; return false;
} }
preventScroll=true;
setDragHandlers(dragMove,dragEnd) setDragHandlers(dragMove,dragEnd)
return false; return false;
} }
@@ -146,8 +148,13 @@ function initialize_sorting(tagList,classList) {
//var jsdebug=debug; //var jsdebug=debug;
//https://stackoverflow.com/questions/49500339/cant-prevent-touchmove-from-scrolling-window-on-ios
var preventScroll=false;
function pd(e) {if(preventScroll) e.preventDefault()}
function init() { function init() {
setStartHandler(mousedown) setStartHandler(mousedown)
document.addEventListener("touchmove",pd,{passive:false})
//var d=element("javascriptdebug"); //var d=element("javascriptdebug");
//if(d) jsdebug=function(msg) { d.innerHTML=msg; } //if(d) jsdebug=function(msg) { d.innerHTML=msg; }
} }