我如何将这段代码放在一起？

Question

I have a Javascript program working in three different places: here, here, and here. 我有一个Javascript程序在三个不同的地方工作：这里，这里和这里。 But I don't know how would I put them in one file. 但是我不知道如何将它们放在一个文件中。 This is where I am at right now. 这就是我现在的位置。

<!DOCTYPE html>
<html>
<head>
<title>TEST</title>
<style>
body {
background-color:#E4E0FF;
}
#canvas {
border:10px solid red;
background-color:white;
}
#canvas2 {
border:10px solid red;
background-color:white;
}
#canvas3 {
border:10px solid red;
background-color:white;
}
</style>
 </head>
 <body>
<canvas id="canvas" width="400" height="300">
</canvas>
<canvas id="canvas2" width="400" height="300">
</canvas>
<canvas id="canvas3" width="400" height="300">
</canvas>
<script src="http://code.jquery.com/jquery-latest.min.js"
    type="text/javascript"></script>

<script type="text/javascript">
var c = document.getElementById("canvas");
var ctx = c.getContext("2d");
var $canvas = $("#canvas");
var canvasOffset = $canvas.offset();
var offsetX = canvasOffset.left;
var offsetY = canvasOffset.top;
var scrollX = $canvas.scrollLeft();
var scrollY = $canvas.scrollTop();

var toggle=0;
var x=150;
var y=100;
var w=100;
var h=100;
var r=60;
var wasInside=false;

ctx.fillStyle = "#000000";
ctx.fillRect(x, y, w, h);

function changeColor() {
if (toggle == 0) {
ctx.fillStyle = "#04B45F";
toggle = 1;
} else if (toggle ==1){
ctx.fillStyle = "#04B45F";
toggle = 2;
}else if (toggle == 2){
ctx.fillStyle = "#0000FF";
toggle = 3;
}else if (toggle == 3){
ctx.fillStyle == "#190707";
toggle = 4;
}else if (toggle == 4){
ctx.fillStyle = "#210B61";
toggle = 5;
}else if (toggle == 5){
ctx.fillStyle = "#FA58AC";
toggle = 6;
}else if (toggle ==6){
ctx.fillStyle = "#FFFF00";
toggle = 7;
}else{
ctx.fillStyle = "#F5A9D0";
toggle = 0;
}

ctx.fillRect(x, y, w, h);
}

 function changeRadius() {
    ctx.fillStyle = "#FFFFFF";
    ctx.fillRect(0,0, 400, 300);
    r = Math.floor((Math.random() * 80) + 20);
    ctx.beginPath();
    ctx.arc(200, 150, r, 0, 2 * Math.PI);
    ctx.stroke();
  }

  function changeWidth() {
ctx.fillStyle = "#FFFFFF";
ctx.fillRect(0,0, 400, 300);    
width = Math.floor((Math.random()*50)+1);
ctx.lineWidth=width;
ctx.stroke();

}

 function handleMouseMove(e) {
 var mx = parseInt(e.clientX - offsetX);
 var my = parseInt(e.clientY - offsetY);

 var isInsideNow = (mx > x && mx < x + w && my > y && my <= y + h);

if (isInsideNow && !wasInside) {
changeColor();
wasInside = true;
} else if (!isInsideNow && wasInside) {
wasInside = false;
}

}

$("#canvas").mousemove(function (e) {
handleMouseMove(e);
});
$("#canvas2").mousemove(function (e) {
handleMouseMove(e);
});
$("#canvas3").mousemove(function (e) {
handleMouseMove(e);
});

</script>
</body>
</html>

So, how would I tell the program to do circle thing in 2nd canvas and line in 3rd canvas??? 那么，我如何告诉程序在第二个画布中做圈圈和在第三个画布中做行呢？ I haven't called the changeWidth and changeRadius functions yet, because it'll just do it in the first canvas making a mess. 我还没有调用changeWidth和changeRadius函数，因为它只会在第一个画布中造成混乱。 I just need something in this part of the code to call different functions in different canvas's 我只需要在代码的这一部分中调用某些功能即可在不同的画布中

 if (isInsideNow && !wasInside) {
     changeColor();
     wasInside = true;
 } else if (!isInsideNow && wasInside) {
     wasInside = false;
 }

Answer 1

I'm not a canvas expert, but just for giving you an idea, check this FIDDLE 我不是画布专家，但仅是为了给您一个想法，请检查此FIDDLE

var c = document.getElementById("canvas");
var ctx = c.getContext("2d");

inspect these 2 lines, the context ctx wil draw in the canvas with id=canvas . 检查这两行，上下文ctx将在id=canvas的画布中绘制。 you can create other contex variables to draw in the other canvas or reuse the same. 您可以创建其他contex变量以在其他画布中绘制或重复使用。

updated FIDDLE 更新的FIDDLE

Update for the update: FIDDLE 更新为更新： FIDDLE

我如何将这段代码放在一起？

问题描述

1 个解决方案

解决方案1
0 已采纳 2014-03-14 21:38:09

我如何将这段代码放在一起？

问题描述

1 个解决方案

解决方案1 0 已采纳 2014-03-14 21:38:09

解决方案1
0 已采纳 2014-03-14 21:38:09