Question

我一直在搜索，无法找到如何在HTML5 Canvas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。

有人可以帮我这个吗？非常感谢您的时间。

Answer 1

答案来自Grid drawn using a <canvas> element looking stretched

刚刚编辑了一下，希望有所帮助

<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>

Answer 2

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>

Answer 3

// Box width
var bw = 270;
// Box height
var bh = 180;
var canvas = document.getElementById("canvas");
var context = canvas.getContext("2d");
function drawBoard(){
    context.lineWidth = 10;
    context.strokeStyle = "rgb(2,7,159)";
    for (var x = 0; x < bw; x += 90) {
        for (var y = 0; y < bh; y += 90) {
           context.strokeRect(x+10, y+10, 90, 90); 
        }
    }
}
drawBoard();

在画布HTML5上绘制网格/表格

3 个答案: