在画布HTML5上绘制网格/表格

Question

在画布HTML5上绘制网格/表格

Jay*_*ayu 11 html5 canvas html5-canvas

我一直在搜索,无法找到如何在HTML5画布上绘制网格/表格.我是HTML5和canvas的新手.

我知道如何绘制形状,但这个绘图网格需要永远理解.

有人可以帮我吗？非常感谢您的时间.

Answer 1

Joh*_*yer 19

答案取自这里使用<canvas>元素绘制的网格绘制拉伸

刚刚编辑了一下,希望它有所帮助

<html>
<head>
<script type="text/javascript" language="javascript">
// Box width
var bw = 400;
// Box height
var bh = 400;
// Padding
var p = 10;

var canvas = document.getElementById("canvas");
var context = canvas.getContext("2d");
function drawBoard(){
    for (var x = 0; x <= bw; x += 40) {
        context.moveTo(0.5 + x + p, p);
        context.lineTo(0.5 + x + p, bh + p);
    }

    for (var x = 0; x <= bh; x += 40) {
        context.moveTo(p, 0.5 + x + p);
        context.lineTo(bw + p, 0.5 + x + p);
    }
    context.strokeStyle = "black";
    context.stroke();
}

drawBoard();
</script>
</head>
<body style=" background: lightblue;">
    <canvas id="canvas" width="420px" height="420px" style="background: #fff; margin:20px"></canvas>
</body>
</html>

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Answer 2

fmt*_*int 6

这也可以写成：

<html>
<head>

</head>
<body style=" background: lightblue;">
    <canvas id="canvas" width="420px" height="420px" style="background: #fff;     magrin:20px;"></canvas>
    <script type="text/javascript" language="javascript">
    var bw = 400;
    var bh = 400;
    var p = 10;
    var cw = bw + (p*2) + 1;
    var ch = bh + (p*2) + 1;

    var canvas = document.getElementById("canvas");
    var context = canvas.getContext("2d");
    function drawBoard(){
        for (var x = 0; x <= bw; x += 40) {
            context.moveTo(0.5 + x + p, p);
            context.lineTo(0.5 + x + p, bh + p);
        }

        for (var x = 0; x <= bh; x += 40) {
            context.moveTo(p, 0.5 + x + p);
            context.lineTo(bw + p, 0.5 + x + p);
        }

        context.strokeStyle = "black";
        context.stroke();
    }

    drawBoard();
    </script>
</body>
</html>

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