Created
September 22, 2011 14:29
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Drap And Drop Method
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//copiei do http://petelepage.com/presentations/2011/gdd-br/webapps/helpers/dnd-lib.js | |
function habilitarDragAndDrop(id, thumbsId) { | |
var el_ = document.getElementById(id); | |
var thumbnails_ = document.getElementById(thumbsId); | |
this.dragenter = function(e) { | |
e.stopPropagation(); | |
e.preventDefault(); | |
el_.classList.add('dropHere'); | |
}; | |
this.dragover = function(e) { | |
e.stopPropagation(); | |
e.preventDefault(); | |
}; | |
this.dragleave = function(e) { | |
e.stopPropagation(); | |
e.preventDefault(); | |
el_.classList.remove('dropHere'); | |
}; | |
this.drop = function(e) { | |
e.stopPropagation(); | |
e.preventDefault(); | |
el_.classList.remove('dropHere'); | |
var files = e.dataTransfer.files; | |
for (var i = 0, file; file = files[i]; i++) { | |
var imageType = /image.*/; | |
if (!file.type.match(imageType)) { | |
continue; | |
} | |
var reader = new FileReader(); | |
reader.onerror = function(evt) { | |
var msg = 'Error ' + evt.target.error.code; | |
switch (evt.target.error.code) { | |
case FileError.NOT_READABLE_ERR: | |
msg += ': NOT_READABLE_ERR'; | |
break; | |
}; | |
alert(msg); | |
}; | |
reader.onload = (function(aFile) { | |
return function(evt) { | |
if (evt.target.readyState == FileReader.DONE) { | |
thumbnails_.insertAdjacentHTML( | |
'afterBegin', '<img src="' + evt.target.result + '" alt="' + | |
aFile.name + '" title="' + aFile.name + '" />'); | |
} | |
}; | |
})(file); | |
reader.readAsDataURL(file); | |
} | |
return false; | |
}; | |
el_.addEventListener("dragenter", this.dragenter, false); | |
el_.addEventListener("dragover", this.dragover, false); | |
el_.addEventListener("dragleave", this.dragleave, false); | |
el_.addEventListener("drop", this.drop, false); | |
}; | |
habilitarDragAndDrop('drop-area','imagens'); |
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