diff -r d7c5bffdd2d8 -r eff9460bd4f2 client/annotviz/app/js/pianoroll.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/client/annotviz/app/js/pianoroll.js	Tue Jan 13 10:46:05 2015 +0100
@@ -0,0 +1,118 @@
+/**
+* js/pianoroll.js
+*
+* pianoroll basic component
+*
+*/
+
+'use strict';
+
+var PIXI = require('pixi');
+var randomColor = require('randomColor');
+
+function PianoRoll(parentContainer, xInit, yInit, height, linesDown, pixelsPerSecond, width, noteColors, colorsReg, lineColor, lineInterval, offsetMusic, noteHeight){
+    var _this = this;
+    this.container = new PIXI.DisplayObjectContainer();
+    this.container.position.x = xInit;
+    this.container.position.y = yInit;
+    parentContainer.addChild(this.container);
+
+    this.linesDown = linesDown;
+    this.height = height;
+    this.pixelsPerSecond = pixelsPerSecond;
+    this.width = width;
+    this.noteColors = noteColors;
+    this.colorsReg = colorsReg || {};
+    this.lineColor = lineColor;
+    this.lineInterval = lineInterval;
+    this.offsetMusic = offsetMusic || 0;
+    this.noteHeight = noteHeight;
+
+    this.addNote = function(note, startTime, duration, velocity, canal){
+        //console.log("coucou 1", note, timeFromZero, ts, velocity, pixelsPerSecond, container, prHeight);
+        var beginX = (this.offsetMusic + startTime) * this.pixelsPerSecond / 1000;
+        var width = duration * this.pixelsPerSecond / 1000;
+        if((beginX+width) <  (Math.abs(this.container.x) - this.width)) {
+            // not visible. do nothing
+            return;
+        }
+        // We draw the rectangle
+        var graphics = new PIXI.Graphics();
+        //console.log("beginX = ", beginX, "canal = ", canal, "color = ", noteColor[canal], "width = ", width, "note = ", note, "velocity = ", velocity);
+        var color = this.colorsReg[canal];
+        if(typeof(color) === 'undefined') {
+            var colorsRegSize = Object.keys(this.colorsReg).length;
+            if(colorsRegSize < this.noteColors.length) {
+                color = this.colorsReg[canal] = this.noteColors[colorsRegSize];
+            }
+            else {
+                color = this.colorsReg[canal] = parseInt(randomColor({ luminosity: 'light', hue: 'random', format:'hex'}).replace(/^#/, ''), 16);
+            }
+        }
+        graphics.beginFill(color, (velocity / 128));
+        var y = (128-note) * this.height / 128; // (128-note) because y = 0 is for note = 128 and y = 128 for note = 0
+        graphics.drawRect(0, Math.floor(y - (noteHeight/2) + ((this.height / 128)/2)), width, noteHeight);
+        graphics.endFill();
+        graphics.x = beginX;
+        this.container.addChild(graphics);
+    };
+
+    this.addLine = function(ts){
+        var graphics = new PIXI.Graphics();
+        var x = -this.container.x;
+        graphics.beginFill(0xFFFF00);
+        graphics.lineStyle(1, this.lineColor);
+        var y = this.linesDown ? this.height - 20 : 0;
+        graphics.moveTo(x, y);
+        graphics.lineTo(x, y + 20);
+        graphics.endFill();
+        this.container.addChild(graphics);
+        // Add text
+        //var totalSec = lineNb * this.lineInterval / 1000;
+        var hours = ts.getHours();
+        var minutes =ts.getMinutes();
+        var seconds = ts.getSeconds();
+        var timeStr = (hours < 10 ? '0' + hours : hours) + ':' + (minutes < 10 ? '0' + minutes : minutes) + ':' + (seconds  < 10 ? '0' + seconds : seconds);
+
+        var fontObj = { font: '10pt Arial', fill: '#444444' };
+        var t = new PIXI.Text(timeStr, fontObj);
+        t.x = x + 2;
+        t.y = this.linesDown ? this.height - 15 : 2;
+        this.container.addChild(t);
+    };
+
+    this.moveTo = function(diffTime){
+        this.container.x = Math.floor(diffTime*this.pixelsPerSecond);
+    };
+
+    this.removePassedObjets = function(){
+        var nbChilds = _this.container.children.length;
+        var i = 0, childIsNowDisplayed = false, childrenToRemove = [];
+        while(i<nbChilds && !childIsNowDisplayed){
+            var child = _this.container.children[i++];
+            //console.log("remove ? ", child.x, child.width, ((child.x + child.width) < (Math.abs(_this.container.x) - _this.width)));
+            if(typeof(child) == 'undefined') {
+                continue;
+            }
+            if((child.x + child.width) < (Math.abs(_this.container.x) - _this.width)){
+                childrenToRemove.push(child);
+                //console.log("    remove !!!");
+            }
+            else {
+                childIsNowDisplayed = true;
+                //console.log("    childIsNowDisplayed");
+            }
+        }
+        childrenToRemove.forEach(function(child) {
+            _this.container.removeChild(child);
+        });
+        //console.log("before : ", nbChilds, ", after : ", _this.container.children.length);
+    };
+
+    // remove notes each scene width
+    //var removeInterval = window.setInterval(this.removePassedObjets, 1000 * sceneWidth / this.pixelsPerSecond );
+    window.setInterval(this.removePassedObjets, 1000 * this.width / this.pixelsPerSecond );
+
+}
+
+module.exports = PianoRoll;