DDFileUploader = function(dropbox, uploadUrl) {
this.dropbox = dropbox;
this.uploadUrl = uploadUrl;
+ this.slideSize = 222;
+ this.progressBarMaxSize = 200; // pixels
+ this.thumbnailSize = 180;
+ this.previewQueue = [];
+ this._previewQueueRunning = false;
+ this.uploadQueue = [];
+ this._uploadQueueRunning = false;
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);});
};
+// Drag and drop
DDFileUploader.prototype.dragenter = function(evt) {
disableDefault(evt);
disablePropagation(evt);
dt.dropEffect = 'copy';
};
-
DDFileUploader.prototype.drop = function(evt) {
disableDefault(evt);
disablePropagation(evt);
this.handleFiles(dt.files);
};
+// Methods about upload
DDFileUploader.prototype.handleFiles = function(files) {
- var file, i;
+ var file, i, slide;
for (i = 0; i < files.length; i++) {
file = files[i];
- console.log(file.type);
- this.upload(file);
+ slide = this.createSlide(file);
+ this.previewQueuePush(slide);
+ this.uploadQueuePush(slide);
}
};
+DDFileUploader.prototype.upload = function(slide) {
+ var reader = new FileReader();
+ var req = new XMLHttpRequest();
+ var file = slide.file;
+ this.previewImg = slide.img;
+ this.progressBar = slide.progressBar;
+ 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.readAsBinaryString(file);
+};
+
+DDFileUploader.prototype.uploadCompleteHandler = function(evt) {
+ this.progressBar.parentNode.removeChild(this.progressBar);
+ this.uploadQueueLoadNext();
+};
-DDFileUploader.prototype.upload = function(file) {
+DDFileUploader.prototype.progressHandler = function(evt) {
+ if (evt.lengthComputable) {
+ var progress = evt.loaded / evt.total;
+ this.updateProgressBar(progress);
+ var currentOpacity = this.previewImg.style.opacity;
+ this.previewImg.style.opacity = Math.max(currentOpacity, progress);
+ }
+};
+
+// Method about queues
+
+DDFileUploader.prototype.previewQueuePush = function(slide) {
+ this.previewQueue.push(slide);
+ if (!this._previewQueueRunning)
+ this.startPreviewQueue();
+};
+
+DDFileUploader.prototype.startPreviewQueue = function() {
+ this._previewQueueRunning = true;
+ this.previewQueueLoadNext();
+};
+
+DDFileUploader.prototype.previewQueueLoadNext = function() {
+ var slide = this.previewQueue.shift();
+ if (slide)
+ this.previewUploadedImage(slide);
+ else
+ this._previewQueueRunning = false;
+};
+
+DDFileUploader.prototype.uploadQueuePush = function(slide) {
+ this.uploadQueue.push(slide);
+ if (!this._uploadQueueRunning)
+ this.startUploadQueue();
+};
+
+DDFileUploader.prototype.startUploadQueue = function() {
+ this._uploadQueueRunning = true;
+ this.uploadQueueLoadNext();
+};
+
+
+DDFileUploader.prototype.uploadQueueLoadNext = function() {
+ var slide = this.uploadQueue.shift();
+ if (slide)
+ this.upload(slide);
+ else
+ this._uploadQueueRunning = false;
+};
+
+
+// User interface
+DDFileUploader.prototype.createSlide = function(file) {
+ var slide = document.createElement('span');
+ slide.file = file;
+
+ var a = document.createElement('a');
+ a.href = '#';
+ a.className = 'slide';
+
+ var img = document.createElement('img');
+ img.className = 'hidden';
+ 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.style.opacity = 0.2;
+ img.className = undefined;
+ };
+ a.appendChild(img);
+ slide.img = img;
+
+ var progressBar = document.createElement('span');
+ progressBar.className = 'upload-progress';
+ slide.progressBar = progressBar;
+
+ slide.appendChild(a);
+ slide.appendChild(progressBar);
+ this.dropbox.appendChild(slide);
+
+ return 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.previewUploadedImage = function(slide) {
var reader = new FileReader();
- var xhr = new XMLHttpRequest();
- var percentage;
+ var size = this.thumbnailSize;
var self = this;
- // this.xhr.upload.addEventListener("progress", function(e) {
- // if (e.lengthComputable) {
- // var percentage = Math.round((e.loaded * 100) / e.total);
- // self.ctrl.update(percentage);
- // }
- // }, false);
-
- // xhr.upload.addEventListener("load", function(e){
- // self.ctrl.update(100);
- // var canvas = self.ctrl.ctx.canvas;
- // canvas.parentNode.removeChild(canvas);
- // }, false);
- console.log(file);
- xhr.open("PUT", this.uploadUrl + '/' + file.name);
- xhr.setRequestHeader("Content-Type", file.type);
- // xhr.overrideMimeType('text/plain; charset=x-user-defined-binary');
+
reader.onload = function(evt) {
- xhr.sendAsBinary(evt.target.result);
+ slide.img.src = evt.target.result;
+ setTimeout(function(){self.previewQueueLoadNext();}, 500);
};
- reader.readAsBinaryString(file);
+ reader.readAsDataURL(slide.file);
};
}());
projects / Plinn.git / blobdiff