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I'm trying to implement html5's drag and drop in my app but Firefox is always redirected to dropped image's source. I'm using e.stopPropagation(). In Chromium everything works as expected. Strange...
Here's the code:
<html>
<head>
<meta charset="utf-8" />
<title>DuOS 0.0.0</title>
<meta name="author" content="Jan Durrer, Michal Grňo" />
<link rel="stylesheet" href="./default.css" />
</head>
<body>
<script src="./boot.js"></script>
<script src="./window.js"></script>
<script src="./omnibox.js"></script>
<section class="desktop">
<img class="icon" id="computer" style="left: 0px; top: 340px;" src="./image/icon/system/computer.png" />
<img class="icon" id="folder" style="left: 0px; top: 170px;" src="./image/icon/system/documents.png" />
<img class="icon" id="bin" style="left: 0px; top: 0px;" src="./image/icon/system/bin.png" />
</section>
<script>
window.clickedIcons = Array();
window.draggedIcon = {};
window.draggedIcon.offset = Array();
window.draggedIcon.element = null;
//Pohybování
function drag_start(e) {
window.draggedIcon.element = e.target;
event.dataTransfer.effectAllowed = 'copyMove';
event.dataTransfer.setData('text/plain', 'hola'); //hack
var style = window.getComputedStyle(event.target, null);
window.draggedIcon.offset[0] = parseInt(style.getPropertyValue("left"),10) - event.clientX; console.log(window.draggedIcon.offset[0]);
window.draggedIcon.offset[1] = parseInt(style.getPropertyValue("top" ),10) - event.clientY; console.log(window.draggedIcon.offset[1]);
window.draggedIcon.element = event.target;
}
function drag_over(e) {
e.preventDefault();
return false;
}
function drop(e) {
window.draggedIcon.element.style.left = (event.clientX + window.draggedIcon.offset[0]) + 'px';
window.draggedIcon.element.style.top = (event.clientY + window.draggedIcon.offset[1]) + 'px';
window.draggedIcon.element.style.visibility = 'visible';
window.draggedIcon.element = null;
if(e.stopPropagation) {e.stopPropagation();}
return false;
}
var xresult = document.evaluate('//body/*[@class="desktop"]/*[@class="icon"]', document, null, XPathResult.ANY_TYPE, null);
var dm = xresult.iterateNext();
while (dm) {
dm.addEventListener('dragstart',drag_start,false);
dm.addEventListener('click',click,false);
dm = xresult.iterateNext();
}
document.body.addEventListener('dragover',drag_over,true);
document.body.addEventListener('drop',drop,true);
</script>
</body>
</html>
Thanks for your help, m93a.
882
Look for the "Accessibility" section. Click the box beside "Warn Me When Web Sites Try to Redirect or Reload the Page" to deselect the option.
Chosen solution Hello Paulatorrey, go from Firefox button (the orange one, in the left top) > Options > Options > Advanced > General > Accessibility and UNCHECK "Warn me when web sites try to redirect or reload the page" [ ].
You need to prevent the default action:
function drop(e) {
if(e.preventDefault) { e.preventDefault(); }
if(e.stopPropagation) { e.stopPropagation(); }
window.draggedIcon.element.style.left = (event.clientX + window.draggedIcon.offset[0]) + 'px';
window.draggedIcon.element.style.top = (event.clientY + window.draggedIcon.offset[1]) + 'px';
window.draggedIcon.element.style.visibility = 'visible';
window.draggedIcon.element = null;
return false;
}
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