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01.html
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01.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>01、text、itext、textbox</title>
</head>
<body>
<button id="sup">上标</button>
<button id="sub">下标</button>
<button id="clear">清除</button>
<canvas id="c"></canvas>
<script src="./bower_components/jQuery/dist/jquery.js"></script>
<script src="./bower_components/fabric.js/dist/fabric.js"></script>
<script>
var canvas = new fabric.Canvas('c', {
width: 500,
height: 300,
backgroundColor: '#ccc'
});
// 无法输入
var text = new fabric.Text('hello world', {
fill: 'red',
underline: true
});
// 可输入默认不换行
var itext = new fabric.IText('hello world', {
fill: 'green',
top: 80
});
// 可输入默认根据空格换行
var textbox = new fabric.Textbox('hello world', {
fill: 'blue',
top: 150
});
canvas.add(text, itext, textbox);
// 上标
$('#sup').click(function () {
var active = canvas.getActiveObject();
if (!active) return;
active.setSuperscript();
canvas.requestRenderAll();
});
// 下标
$('#sub').click(function () {
var active = canvas.getActiveObject();
if (!active) return;
active.setSubscript();
canvas.requestRenderAll();
});
// 清除
$('#clear').click(function () {
var active = canvas.getActiveObject();
if (!active) return;
// 清除选中对象样式
// active.setSelectionStyles({
// fontSize: undefined,
// deltaY: undefined,
// });
// 清除对象样式
itext.styles = {
fontSize: undefined,
deltaY: undefined
};
// itext.removeStyle('fontSize')
// itext.removeStyle('deltaY')
canvas.requestRenderAll();
});
</script>
</body>
</html>