96 lines
2.8 KiB
HTML
96 lines
2.8 KiB
HTML
<mk-analog-clock>
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<canvas ref="canvas" width="256" height="256"></canvas>
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<style>
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:scope
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> canvas
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display block
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width 256px
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height 256px
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</style>
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<script>
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const Vec2 = function(x, y) {
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this.x = x;
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this.y = y;
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};
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this.on('mount', () => {
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this.draw()
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this.clock = setInterval(this.draw, 1000);
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});
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this.on('unmount', () => {
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clearInterval(this.clock);
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});
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this.draw = () => {
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const now = new Date();
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const s = now.getSeconds();
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const m = now.getMinutes();
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const h = now.getHours();
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const ctx = this.refs.canvas.getContext('2d');
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const canvW = this.refs.canvas.width;
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const canvH = this.refs.canvas.height;
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ctx.clearRect(0, 0, canvW, canvH);
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{ // 背景
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const center = Math.min((canvW / 2), (canvH / 2));
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const lineStart = center * 0.90;
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const shortLineEnd = center * 0.87;
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const longLineEnd = center * 0.84;
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for (let i = 0; i < 60; i++) {
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const angle = Math.PI * i / 30;
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const uv = new Vec2(Math.sin(angle), -Math.cos(angle));
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ctx.beginPath();
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ctx.lineWidth = 1;
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ctx.moveTo((canvW / 2) + uv.x * lineStart, (canvH / 2) + uv.y * lineStart);
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if (i % 5 == 0) {
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ctx.strokeStyle = 'rgba(255, 255, 255, 0.2)';
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ctx.lineTo((canvW / 2) + uv.x * longLineEnd, (canvH / 2) + uv.y * longLineEnd);
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} else {
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ctx.strokeStyle = 'rgba(255, 255, 255, 0.1)';
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ctx.lineTo((canvW / 2) + uv.x * shortLineEnd, (canvH / 2) + uv.y * shortLineEnd);
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}
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ctx.stroke();
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}
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}
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{ // 分
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const angle = Math.PI * (m + s / 60) / 30;
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const length = Math.min(canvW, canvH) / 2.6;
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const uv = new Vec2(Math.sin(angle), -Math.cos(angle));
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ctx.beginPath();
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ctx.strokeStyle = '#ffffff';
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ctx.lineWidth = 2;
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ctx.moveTo(canvW / 2 - uv.x * length / 5, canvH / 2 - uv.y * length / 5);
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ctx.lineTo(canvW / 2 + uv.x * length, canvH / 2 + uv.y * length);
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ctx.stroke();
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}
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{ // 時
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const angle = Math.PI * (h % 12 + m / 60) / 6;
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const length = Math.min(canvW, canvH) / 4;
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const uv = new Vec2(Math.sin(angle), -Math.cos(angle));
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ctx.beginPath();
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ctx.strokeStyle = _THEME_COLOR_;
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ctx.lineWidth = 2;
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ctx.moveTo(canvW / 2 - uv.x * length / 5, canvH / 2 - uv.y * length / 5);
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ctx.lineTo(canvW / 2 + uv.x * length, canvH / 2 + uv.y * length);
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ctx.stroke();
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}
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{ // 秒
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const angle = Math.PI * s / 30;
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const length = Math.min(canvW, canvH) / 2.6;
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const uv = new Vec2(Math.sin(angle), -Math.cos(angle));
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ctx.beginPath();
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ctx.strokeStyle = 'rgba(255, 255, 255, 0.5)';
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ctx.lineWidth = 1;
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ctx.moveTo(canvW / 2 - uv.x * length / 5, canvH / 2 - uv.y * length / 5);
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ctx.lineTo(canvW / 2 + uv.x * length, canvH / 2 + uv.y * length);
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ctx.stroke();
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}
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};
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</script>
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</mk-analog-clock>
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