From 75a21564a8d1d05009483f889815cee9c11dee01 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Benoi=CC=82t=20Pin?= <pin@cri.ensmp.fr>
Date: Thu, 20 Jun 2013 21:09:48 +0200
Subject: [PATCH] Affichage barre de progression et image en local lors de
 l'upload.

---
 skins/fileupload.js | 96 +++++++++++++++++++++++++++++++++++++--------
 1 file changed, 80 insertions(+), 16 deletions(-)

diff --git a/skins/fileupload.js b/skins/fileupload.js
index d1da59e..75c6c6f 100644
--- a/skins/fileupload.js
+++ b/skins/fileupload.js
@@ -6,6 +6,9 @@ var DDFileUploader;
 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);});
@@ -39,37 +42,98 @@ DDFileUploader.prototype.handleFiles = function(files) {
 	var file, i;
 	for (i = 0; i < files.length; i++) {
 		file = files[i];
-		console.log(file.type);
+		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 xhr = new XMLHttpRequest();
-	var percentage;
+	var req = new XMLHttpRequest();
 	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){
+	
+	addListener(req.upload, 'progress', function(evt){self.progressHandler(evt);});
+	addListener(req.upload, 'load', function(evt){self.uploadCompleteHandler(evt);});
+
+	// req.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');
+	req.open("PUT", this.uploadUrl + '/' + file.name);
+	req.setRequestHeader("Content-Type", file.type);
+	// req.overrideMimeType('text/plain; charset=x-user-defined-binary');
 	reader.onload = function(evt) {
-		xhr.sendAsBinary(evt.target.result);
+		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)
+		this.updateProgressBar(evt.loaded / evt.total);
+};
+
+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);
+};
+
 }());
-- 
2.20.1