[API HTML5] Un seul canvas plusieurs evenements de la souris

okay je vois bien ...
je voulais m'inspirer de sa ... mais travailler avec plusieurs canvas était la solution..... j'ai évoulué dans mon code :
Code:
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<!DOCTYPE html>
<html lang="en">
	<head>
		<meta charset="utf-8">
		<!-- /* ------------------------------  Mes Feuilles de styles     ----------------------*/ -->	
<style type="text/css">
body {
	margin: 0px;
	overflow:hidden; 
}
html {
	overflow: auto;
}
table.center {
    margin-left:auto; 
    margin-right:auto;
}
div #conteneur{
	margin-left:auto; 
	margin-right:auto;	
}	
/*----------------------- For dialog box -----------------------*/
#mask {
  position:absolute;
  left:0;
  top:0;
  z-index:9000;
  background-color:#000;
  display:none;
}  
#conteneur .window {
  position:relative;
  width:185px;
  height:200px;
  z-index:9999;
  display:none;
}
#conteneur #dialog {
  width:185px; 
  height:200px;
  background-color:#ffffff;
}
/*----------------------- For canvas -----------------------*/
canvas {background-image: url('images/background.png');border: 0px inset brown;} 
 
</style>
<!-- Always force latest IE rendering engine (even in intranet) & Chrome Frame Remove this if you use the .htaccess -->
		<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
		<title>Drag_Drop_1</title>
		<meta name="description" content="">
		<meta name="author" content="ACER">
		<meta name="viewport" content="width=device-width; initial-scale=1.0">		
		<script type="text/javascript" src="jquery-latest.pack.js"></script>
 
<!-- /* ------------------------------   Codes JavaScript     ------------------*/ -->	
<script>
 
	// ------------------ Variables globales canvas 2 -------------------------------------
	 var img_2,isDown=false,canvasOffset,mycanvas_2,ctx_mycanvas_2,offsetX_2,offsetY_2;
	 var cx,cy;
 
	//------- Variables globales -----------------------------
	var canvas, ctx,ctx_mycanvas,mycanvas,flag = false,crayon = false, erase=false,img,offsetX,offsetY,
    prevX = 0,
    currX = 0,
    prevY = 0,
    currY = 0,
    dot_flag = false;
	var x = "black",
    y = 2;
 
	// Pour Drag and Drop variables
	var canvasWidth,canvasHeight,isActiving=false,isDragging=false,my_erase,my_pencil,my_valide;
	var w;
	var h;
	var r=0;
 
 
function init() {
/*-------------- For  deseign_paper and Draw line --------------------------- */
canvas = document.getElementById('deseign_paper');
if (canvas.getContext){
			ctx = canvas.getContext("2d");
 
			w = canvas.width;
    		h = canvas.height; 
 
			canvas.addEventListener("mousemove", function (e) {findxy('move', e)}, false);
    		canvas.addEventListener("mousedown", function (e) {findxy('down', e)}, false);
    		canvas.addEventListener("mouseup", function (e) {findxy('up', e)}, false);
    		canvas.addEventListener("mouseout", function (e) {findxy('out', e)}, false);
    }
}
 
function findxy(res, e) {	
 
if (res == 'down') {        
 
        prevX = currX;
        prevY = currY;	
 
        currX = e.clientX - canvas.offsetLeft;
        currY = e.clientY - canvas.offsetTop;      
 
        flag = true;
        dot_flag = true;  		
 
    if (dot_flag && crayon && erase == false ) { 
 
		ctx.beginPath();
		ctx.fillStyle = x;
        ctx.fillRect(currX, currY, 2, 2);
		ctx.save();
		ctx.closePath();
		dot_flag = false;
    }	
 
	  if (dot_flag && crayon == false && erase ) { 	  
	  	ctx.clearRect(0,0,ctx.canvas.width,ctx.canvas.height);
		dot_flag = false;
 
			// Non Display  tools
				my_erase = document.getElementById('my_erase');
				my_erase.style.display="none";
 
				my_valide = document.getElementById('valider');
				my_valide.style.display="block";
 
				my_pencil = document.getElementById('my_pencil');
				my_pencil.style.display="block";
 
				my_rotation=document.getElementById('my_rotation');
				my_rotation.style.display="none";
    }
 
}
if (res == 'up' || res == "out") {flag = false;} 
 
if (res == 'move' && crayon && erase == false) {
   		if (flag) {	  				
 
		prevX = currX;
    	prevY = currY;
 
    	currX = e.clientX - canvas.offsetLeft;
    	currY = e.clientY - canvas.offsetTop;
    	draw();
 
		//Display eraser tool
			my_erase=document.getElementById('my_erase');
			my_erase.style.display="block";
 
			my_valide=document.getElementById('valider');
			my_valide.style.display="block";
 
			my_pencil=document.getElementById('my_pencil');
			my_pencil.style.display="none";
 
			my_rotation=document.getElementById('my_rotation');
			my_rotation.style.display="none";
 
			}
		}			
}
 
function dessin_libre(obj) {   
 
switch (obj.id) {
    case "my_pencil":	
			crayon=true;
			erase=false;
            x = "black";		
			break; 
 
     case "my_erase": 
	 		erase=true;
			crayon=false;
            x = "white";
            break;
      default: 
        	crayon=false;
            x = "white";
            break;       
    }  
if (x == "white") y = 14;
  else y = 2;
}
 
function draw() {
 
    ctx.beginPath();
    ctx.moveTo(prevX, prevY);
    ctx.lineTo(currX, currY);
    ctx.strokeStyle = x;
    ctx.lineWidth = y;
    ctx.stroke();
	ctx.closePath();
}
 
function Valider_choix(env){
 
 	mycanvas = document.createElement("canvas");
	ctx_mycanvas = mycanvas.getContext('2d');
 
	mycanvas.id = "CursorLayer";
	mycanvas.width = 184; mycanvas.height = 164;
	mycanvas.style.zIndex = 8;
	mycanvas.style.position = "absolute";
	mycanvas.style.border = "1px solid";
	mycanvas.style.top="25px";
	mycanvas.style.background="transparent";
 
	document.body.appendChild(mycanvas);
 
 
	img = document.getElementById(env);
	ctx_mycanvas.drawImage(img,0,0,50,50);	
 
	canvasOffset=$("#CursorLayer").offset(); 
	offsetX=canvasOffset.left;
	offsetY=canvasOffset.top;
 
    canvasWidth=mycanvas.width;
	canvasHeight=mycanvas.height;
 
	mycanvas.addEventListener("dblclick",function(e){imgxy('dbclick', e)}, false);
  	mycanvas.addEventListener("mousemove",function(e){imgxy('move', e)}, false);
  	mycanvas.addEventListener("mousedown",function(e){imgxy('down', e)}, false);
  	mycanvas.addEventListener("mouseup",function(e){imgxy('up', e)}, false);
  	mycanvas.addEventListener("mouseout",function(e){imgxy('out', e)}, false);  
 
    isActiving=true;
    crayon=false;
}
 
function imgxy(res,e){
 
	if(res=='down' && isActiving){
 
		canMouseX=parseInt(e.clientX-offsetX);
		canMouseY=parseInt(e.clientY-offsetY);      
 
	 // set the drag flag
		isDragging=true;
 
	// Non Display  tools
		my_erase = document.getElementById('my_erase');
		my_erase.style.display="none";
 
		my_valide = document.getElementById('valider');
		my_valide.style.display="none";
 
		my_pencil = document.getElementById('my_pencil');
		my_pencil.style.display="none";
 
		my_rotation=document.getElementById('my_rotation');
		my_rotation.style.display="none";
 
	}
 
	if(res=='move' && isActiving && crayon==false){
 
		canMouseX=parseInt(e.clientX-offsetX);
		canMouseY=parseInt(e.clientY-offsetY);
 
	// if the drag flag is set, clear the canvas and draw the image
	   if(isDragging){
				ctx_mycanvas.clearRect(0,0,canvasWidth,canvasHeight);	
				ctx_mycanvas.drawImage(img,canMouseX - 50/2,canMouseY - 50/2,50,50);
 
			}
	}
 
	if(res=='up' && isActiving){
		canMouseX=parseInt(e.clientX-offsetX);
		canMouseY=parseInt(e.clientY-offsetY);
 
		// clear the drag flag
		  isDragging=false;
 
 
	}
 
	if(res=='out' && isActiving){
	canMouseX=parseInt(e.clientX-offsetX);
    canMouseY=parseInt(e.clientY-offsetY);
 
    // user has left the canvas, so clear the drag flag
      isDragging=false;
 
	}
 
	if(res=='dbclick' && isActiving){
 
		mycanvas_2 = document.createElement("canvas");
		ctx_mycanvas_2 = mycanvas_2.getContext('2d');
		mycanvas_2.id = "CursorLayer_2";		
		mycanvas_2.width = 90;
		mycanvas_2.height = 90;
		mycanvas_2.style.zIndex = 8;
		mycanvas_2.style.position = "absolute";
		mycanvas_2.style.border = "0px solid";
 
		mycanvas_2.style.background="transparent";
		document.body.appendChild(mycanvas_2);
 
		canvasOffset=$(mycanvas_2).offset();	
		offsetX_2=canvasOffset.left;
		offsetY_2=canvasOffset.top;
 
		cx=mycanvas_2.width/2;
		cy=mycanvas_2.height/2;	
 
		// ---------- Position du carreau dynamique  -----------------
			var rect = canvas.getBoundingClientRect();
			var x=e.clientX - rect.left;
			var y=e.clientY - rect.top;
 
			mycanvas_2.style.left=""+ x + "px";
			mycanvas_2.style.top=""+ y + "px";
	//-----------------------------------------------------------
 
		ctx_mycanvas.clearRect(0,0,mycanvas.width,mycanvas.height);		
		img_2 = document.getElementById("Dynamiq_picture");
 
		h=img_2.height/2;
		w=img_2.width/2; 
//---------- modification de la taille de mon image ---------
		h=h+12.5;
		w=w+13.5;
//-----------------------------------------------------------
		my_draw();	
 
 
		mycanvas_2.addEventListener("mousemove",function(e){handleMousexy('move', e)}, false);
		mycanvas_2.addEventListener("mousedown",function(e){handleMousexy('down', e)}, false);
		mycanvas_2.addEventListener("mouseup",function(e){handleMousexy('up', e)}, false);
		mycanvas_2.addEventListener("mouseout",function(e){handleMousexy('out', e)}, false); 	
 
		isActiving=false;	
	}
}
 
function handleMousexy(res,e){
 
    	if(res=='down'){
 
			mouseX=parseInt(e.clientX-offsetX_2);
			mouseY=parseInt(e.clientY-offsetY_2);
 
			drawRotationHandle(false);
//------------- isDown=ctx_mycanvas_2.isPointInPath(Math.abs(mouseX),Math.abs(mouseY)); -----------------------
			isDown=true;
			//console.log(isDown);
		}
 
		if(res=='up'){isDown=false;}
 
		if(res=='out'){
			isDown=false;
//------------- faire appel à l'ancien canvas et le position à l'endroit actuel avec une rotation ------------
 
		}		
		if(res=='move'){
 
			if(!isDown){return;}
				mouseX=parseInt(e.clientX-offsetX_2);
				mouseY=parseInt(e.clientY-offsetY_2);
				var dx=mouseX-cx;
				var dy=mouseY-cy;
				r=Math.atan2(dy,dx);
				my_draw();
				isDragging=true;
		}
 
}
 
function my_draw(){ 
	ctx_mycanvas_2.clearRect(0,0,mycanvas_2.width,mycanvas_2.height);
    drawRotationHandle(true);
    drawRect();
}
 
 function drawRect(){
		ctx_mycanvas_2.save();
 
        ctx_mycanvas_2.translate(cx,cy);
        ctx_mycanvas_2.rotate(r);
//---------   Modification de la taille de l'image ------------
		var Origine_largeur,Origine_hauteur;
			Origine_largeur=img_2.width+27;
			Origine_hauteur=img_2.height+25;
//--------------------------------------------------------------			
		ctx_mycanvas_2.drawImage(img_2,0,0,Origine_largeur,Origine_hauteur,-w/2,-h/2,w,h);	
		ctx_mycanvas_2.restore();
}
 
//Mes méthodes
function drawRotationHandle(withFill){
 
	ctx_mycanvas_2.save();	
	ctx_mycanvas_2.translate(cx,cy);	
	ctx_mycanvas_2.rotate(r);	
		ctx_mycanvas_2.beginPath();
		ctx_mycanvas_2.moveTo(0,-1);
		ctx_mycanvas_2.lineTo(w/2+20,-1);
		ctx_mycanvas_2.lineTo(w/2+20,-7);
		ctx_mycanvas_2.lineTo(w/2+30,-7);
		ctx_mycanvas_2.lineTo(w/2+30,7);
		ctx_mycanvas_2.lineTo(w/2+20,7);
		ctx_mycanvas_2.lineTo(w/2+20,1);
		ctx_mycanvas_2.lineTo(0,1);
	ctx_mycanvas_2.closePath();	
 
	if(withFill){ 
	ctx_mycanvas_2.fillStyle="blue";
	ctx_mycanvas_2.fill();}
 	ctx_mycanvas_2.restore();
}
 
 
</script>
 
 
<script>
 
		$(document).ready(function() {
		//select all the a tag with name equal to modal
		$('a[name=modal]').click(function(e) {
		//Cancel the link behavior
		e.preventDefault();
 
		//Get the A tag
		var id = $(this).attr('href');
 
		//Get the screen height and width
		var maskHeight = $(document).height();
		var maskWidth = $(window).width();
 
		//Set heigth and width to mask to fill up the whole screen
		$('#mask').css({'width':maskWidth,'height':maskHeight});
 
		//transition effect		
		$('#mask').fadeIn(1000);	
		$('#mask').fadeTo("slow",0.8);	
 
		//Get the window height and width
		var winH = $(window).height();
		var winW = $(window).width();
 
		//Set the popup window to center
		//$(id).css('top',  winH/2-$(id).height()/2);
		//$(id).css('left', winW/2-$(id).width()/2);
 
		//transition effect
		$(id).fadeIn(2000); 
	 });
 
		//if close button is clicked
		$('.window .close').click(function (e) {
		//Cancel the link behavior
		e.preventDefault();
 
		$('#mask').hide();
		$('.window').hide();
	});		
 
		//if mask is clicked
		$('#mask').click(function () {
		$(this).hide();
		$('.window').hide();
	});	
		$(window).resize(function () {
 
 		var box = $('#conteneur .window');
 
        //Get the screen height and width
        var maskHeight = $(document).height();
        var maskWidth = $(window).width();
 
        //Set height and width to mask to fill up the whole screen
        $('#mask').css({'width':maskWidth,'height':maskHeight});
 
        //Get the window height and width
        var winH = $(window).height();
        var winW = $(window).width();
 
        //Set the popup window to center
       // box.css('top',  winH/2 - box.height()/2);
       // box.css('left', winW/2 - box.width()/2);
	 });
});
</script>
 
</head>
<body  onload="init()">
	<div id="conteneur" style="border:0.8px solid #000;position:relative;overflow:hidden;width: 185px;height: 188px;">			
		<!-- /* ------------------------------  Banner     ----------------------*/ -->	
			<div class="banner" style="border: 0.3px solid; width: 185px ; height: 25px;">
				<table>
					<tr>
						<td>
							<img id="my_erase" src="images/erase.png" style="display:none" width="15px" height="15px" onclick="dessin_libre(this)">
						</td>
						<td>
							<img id="my_pencil" src="images/pen.png" style="display:block" width="15px" height="15px" onclick="dessin_libre(this)">
						</td>					
						<td>								
							<a href="#dialog" name="modal">
								<img id="valider" src="images/valider.png" style="border: 0px; width: 15px; height: 15px; display:none">
							</a>								
						</td>
						<td>
							<img id="my_rotation" src="images/rotate.png" style="border: 0px; width: 15px; height: 15px; display:none">
						</td> 
					</tr>
				</table> 
			</div>	
			<div id="dialog" class="window">
				<table class="center">
					<tr>
						<td><img id="Dynamiq_picture" src="images/tof_2.png" width="60px" height="60px"></td>
					</tr>
					<tr>					
						<td><a href="#"> Non </a></td>
						<td>
							<a href="#" class="close" onclick="Valider_choix('Dynamiq_picture')" > Oui </a>							
						</td>
					</tr>										
				</table>
			</div> 
			<!-- /* ------------------------------  Banner     ----------------------*/ -->	
			<div id="mybody" >
				<canvas id="deseign_paper" style="z-index: 2; position:absolute; left:0px; top:25px;" width="185" height="188">
				</canvas>
			</div>			
 
				<!-- Mask to cover the whole screen -->
			<div id="mask"> </div> 	
	</div>
</body>
</html>
mais je cherche à passer d'un canvas à l'autre via mes événements dbclick/mousedown etc ... j'ai aussi travaillé avec la transparence de certain canvas.....
ici je veux pouvoir revenir sur mon ancien canvas mais avec l'image du dernier canvas et sa coince un peu .:oops: