-// © 2013 Benoît Pin MINES ParisTech
-var DDFileUploader;
-
-(function(){
-
-DDFileUploader = function(dropbox, uploadUrl) {
- this.dropbox = dropbox;
- this.uploadUrl = uploadUrl;
- this.slideSize = 222;
- this.progressBarMaxSize = 200; // pixels
- this.thumbnailSize = 180;
- var self = this;
- addListener(dropbox, 'dragenter', function(evt){self.dragenter(evt);});
- addListener(dropbox, 'dragover', function(evt){self.dragover(evt);});
- addListener(dropbox, 'drop', function(evt){self.drop(evt);});
-};
-
-DDFileUploader.prototype.dragenter = function(evt) {
- disableDefault(evt);
- disablePropagation(evt);
-};
-
-DDFileUploader.prototype.dragover = function(evt) {
- disableDefault(evt);
- disablePropagation(evt);
- evt = getEventObject(evt);
- var dt = evt.dataTransfer;
- dt.dropEffect = 'copy';
-};
-
-
-DDFileUploader.prototype.drop = function(evt) {
- disableDefault(evt);
- disablePropagation(evt);
- getEventObject(evt);
- var dt = evt.dataTransfer;
- dt.dropEffect = 'copy';
- this.handleFiles(dt.files);
-};
-
-DDFileUploader.prototype.handleFiles = function(files) {
- var file, i;
- for (i = 0; i < files.length; i++) {
- file = files[i];
- this.createSlide();
- this.previewUploadedImage(file);
- this.upload(file);
- }
-};
-
-
-DDFileUploader.prototype.createSlide = function() {
- var slide = document.createElement('span');
-
- var a = document.createElement('a');
- a.href = '#';
- a.className = 'slide';
-
- var img = document.createElement('img');
- this.previewImg = img;
- var size = this.thumbnailSize;
- var self = this;
- img.onload = function(evt) {
- if (img.width > img.height) { // landscape
- img.height = Math.round(size * img.height / img.width);
- img.width = size;
- }
- else {
- img.width = Math.round(size * img.width / img.height);
- img.height = size;
- }
- img.style.marginLeft = Math.round((self.slideSize - img.width) / 2) + 'px';
- img.style.marginTop = Math.round((self.slideSize - img.height) / 2) + 'px';
- img.className = undefined;
- };
- a.appendChild(img);
-
- var progressBar = document.createElement('span');
- progressBar.className = 'upload-progress';
-
- slide.appendChild(a);
- slide.appendChild(progressBar);
- this.progressBar = progressBar;
- this.dropbox.appendChild(slide);
-};
-
-DDFileUploader.prototype.updateProgressBar = function(progress) {
- // 0 <= progress <= 1
- var size = this.progressBarMaxSize * progress;
- size = Math.round(size);
- this.progressBar.style.width = size + 'px';
-}
-
-
-DDFileUploader.prototype.upload = function(file) {
- var reader = new FileReader();
- var req = new XMLHttpRequest();
- var self = this;
-
- addListener(req.upload, 'progress', function(evt){self.progressHandler(evt);});
- addListener(req.upload, 'load', function(evt){self.uploadCompleteHandler(evt);});
-
- req.open("PUT", this.uploadUrl + '/' + file.name);
- req.setRequestHeader("Content-Type", file.type);
- addListener(reader, 'load', function(evt){req.sendAsBinary(evt.target.result);})
- // reader.onload = function(evt) {
- // req.sendAsBinary(evt.target.result);
- // };
- reader.readAsBinaryString(file);
-};
-
-DDFileUploader.prototype.uploadCompleteHandler = function(evt) {
- this.progressBar.parentNode.removeChild(this.progressBar);
-};
-
-DDFileUploader.prototype.progressHandler = function(evt) {
- if (evt.lengthComputable) {
- var progress = evt.loaded / evt.total;
- this.updateProgressBar(progress);
- this.previewImg.style.opacity=progress;
- }
-};
-
-DDFileUploader.prototype.previewUploadedImage = function(file) {
- var reader = new FileReader();
- var img = this.previewImg;
- var size = this.thumbnailSize;
-
- img.className = 'hidden';
-
- reader.onload = function(evt) {
- img.src = evt.target.result;
- };
- reader.readAsDataURL(file);
-};
-
-}());