이 희망을 시도해보십시오.
<select name="Decal Shape" id="decalshap" class="hasClass" style="height:30px;">
<option > Select Shape </option>
<option value="oval"> OVAL </option>
<option value="circle"> CIRCLE </option>
<option value="rectangle">RECTANGLE</option>
<option value="hrectangle"> HORIZONTAL RECTANGLE </option>
<option value="vrectangle"> VERTICAL RECTANGLE </option>
</select>
<div id="work_area">
</div>
$("#decalshap").change(function() {
alert("decal");
var shap = $(this).val();
if(shap=="oval")
{
var elementID = 'canvas' + $('canvas').length;
$('<canvas>').attr({
id: elementID
}).css({
width:1200,
height:600
}).appendTo('#work_area');
var canvas = document.getElementById(elementID);
var ctx = canvas.getContext('2d');
// ctx.fillStyle='rgba(70, 70, 255, 0.7)'
// ctx.fillRect(20,20,150,100);
var centerX = 0;
var centerY = 0;
var radius = 50;
ctx.save();
ctx.translate(canvas.width/2, canvas.height/2);
ctx.scale(2, 1);
ctx.beginPath();
ctx.arc(centerX, centerY, radius, 0, 2 * Math.PI, false);
ctx.restore();
ctx.fillStyle = '#8ED6FF';
ctx.fill();
ctx.lineWidth = 5;
ctx.strokeStyle = 'black';
ctx.stroke();
ctx.beginPath();
ctx.arc(centerX, centerY, radius, 0, 2 * Math.PI, false);
}
if(shap=="circle")
{
var elementID = 'canvas' + $('canvas').length;
$('<canvas>').attr({
id: elementID
}).css({
width:1200,
height:600
}).appendTo('#work_area');
var canvas = document.getElementById(elementID);
var ctx = canvas.getContext('2d');
ctx.beginPath();
ctx.arc(100,75,50,0,2*Math.PI);
ctx.stroke();
}
if(shap=="hrectangle")
{
var elementID = 'canvas' + $('canvas').length;
$('<canvas>').attr({
id: elementID
}).css({
width:1200,
height:300
}).appendTo('#work_area');
var canvas = document.getElementById(elementID);
var ctx = canvas.getContext('2d');
ctx.fillStyle='border: 1px dotted';
ctx.fillRect(0,0,200,400);
}
if(shap=="vrectangle")
{
var elementID = 'canvas' + $('canvas').length;
$('<canvas>').attr({
id: elementID
}).css({
width:300,
height:600
}).appendTo('#work_area');
var canvas = document.getElementById(elementID);
var ctx = canvas.getContext('2d');
ctx.fillStyle='border: 1px dotted';
ctx.fillRect(0,0,400,200);
}
});
안녕하세요, 귀하의 게시물은 코드로만 구성되어 있기 때문에 "품질이 좋지 않음"으로 표시되었습니다. 어떻게 그리고 왜 이것이 질문에 대답하는지에 대한 정확한 설명을 제공하여 답변을 크게 향상시킬 수 있습니까? – Ben