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| <!-- saved from url=(0022)http://internet.e-mail -->
<html>
<head>
<script type="application/javascript">
var etat;
var ctx;
var MonTableau = new Array();
var forme;
function ligne()
{
forme = "ligne";
}
function carre()
{
forme = "carre";
}
function cercle()
{
forme = "cercle";
}
function drawLine(xDeb, yDeb, xFin, yFin)
{
ctx.strokeStyle = 'rgb(255,0,0)';
ctx.beginPath();
ctx.moveTo(xDeb, yDeb);
ctx.lineTo(xFin, yFin);
ctx.stroke();
}
function drawRectangle(xDeb, yDeb, xFin, yFin)
{
ctx.strokeStyle = 'rgb(255,0,0)';
ctx.strokeRect (xDeb, yDeb, xFin-xDeb, yFin-yDeb);
}
function drawCercle(xDeb, yDeb, xFin, yFin)
{
ctx.strokeStyle = 'rgb(255,0,0)';
ctx.beginPath();
ctx.arc(xDeb, yDeb, Math.sqrt(((xFin-xDeb)*(xFin-xDeb))+((yFin-yDeb)*(yFin-yDeb))), 0, Math.PI*2, true);
ctx.stroke();
}
function draw()
{
ctx.fillStyle = "rgb(200,200,200)";
ctx.fillRect (0, 0, 600, 600);
if (forme == "carre"){
drawRectangle(MonTableau[0], MonTableau[1], MonTableau[2], MonTableau[3]);
}
else if (forme == "ligne"){
drawLine(MonTableau[0], MonTableau[1], MonTableau[2], MonTableau[3]);
}
else if (forme == "cercle"){
drawCercle(MonTableau[0], MonTableau[1], MonTableau[2], MonTableau[3]);
}
}
function load()
{
restore
etat=0;
var canvas = document.getElementById("canvas");
ctx = canvas.getContext("2d");
ctx.fillStyle = "rgb(200,200,200)";
ctx.fillRect (0, 0, 600, 600);
draw();
}
function press(event)
{
switch(etat)
{
case 0:
etat=1;
MonTableau[0] = event.clientX-parseInt(document.getElementById("position").style.left);
MonTableau[1] = event.clientY-parseInt(document.getElementById("position").style.top);
MonTableau[2] = event.clientX-parseInt(document.getElementById("position").style.left);
MonTableau[3] = event.clientY-parseInt(document.getElementById("position").style.top);
draw();
break;
case 1:
break;
case 2:
break;
}
}
function release(event)
{
switch(etat)
{
case 0:
break;
case 1:
etat=0;
draw();
break;
case 2:
MonTableau[2] = event.clientX-parseInt(document.getElementById("position").style.left);
MonTableau[3] = event.clientY-parseInt(document.getElementById("position").style.top);
etat=0;
draw();
//load();
break;
}
}
function move(event)
{
switch(etat)
{
case 0:
break;
case 1:
MonTableau[2] = event.clientX-parseInt(document.getElementById("position").style.left);
MonTableau[3] = event.clientY-parseInt(document.getElementById("position").style.top);
etat=2;
draw();
break;
case 2:
MonTableau[2] = event.clientX-parseInt(document.getElementById("position").style.left);
MonTableau[3] = event.clientY-parseInt(document.getElementById("position").style.top);
etat=2;
draw();
break;
}
}
</script>
</head>
<body onload="load()">
<div id="position" style="position:absolute; left:0px; top:0px;">
<canvas id="canvas" onmousedown="press(event)" onmouseup="release(event)" onmousemove="move(event)" width="600" height="600"></canvas></div>
<div id="position" style="position:absolute; left:0px; top:0px;">
<button type="button" onclick="ligne();">
Ligne
</button>
<button type="button" onclick="carre();">
Rectangle
</button>
<button type="button" onclick="cercle();">
Cercle
</button>
<button type="button" onclick="load();">
Reset
</button>
</div>
</body>
</html> |
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