智慧宿舍系统小程序

2025-12-17 16:36:03 +08:00 · 2021-07-27 21:57:03 +08:00
parent 8b2c22efe2
commit b16621221e
1290 changed files with 56513 additions and 0 deletions
--- a/wechat/miniprogram/libs/util.js
+++ b/wechat/miniprogram/libs/util.js
@@ -0,0 +1,117 @@
+let rgb2hsl = function(r, g, b) {
+  r /= 255, g /= 255, b /= 255;
+  var max = Math.max(r, g, b),
+    min = Math.min(r, g, b);
+  var h, s, l = (max + min) / 2;
+
+  if (max == min) {
+    h = s = 0; // achromatic
+  } else {
+    var d = max - min;
+    s = l > 0.5 ? d / (2 - max - min) : d / (max + min);
+    switch (max) {
+      case r:
+        h = (g - b) / d + (g < b ? 6 : 0);
+        break;
+      case g:
+        h = (b - r) / d + 2;
+        break;
+      case b:
+        h = (r - g) / d + 4;
+        break;
+    }
+    h /= 6;
+  }
+  return [h, s, l];
+}
+
+let hslToRgb = function(h, s, l) {
+  var r, g, b;
+  if (s == 0) {
+    r = g = b = l; // achromatic
+  } else {
+    var hue2rgb = function hue2rgb(p, q, t) {
+      if (t < 0) t += 1;
+      if (t > 1) t -= 1;
+      if (t < 1 / 6) return p + (q - p) * 6 * t;
+      if (t < 1 / 2) return q;
+      if (t < 2 / 3) return p + (q - p) * (2 / 3 - t) * 6;
+      return p;
+    }
+    var q = l < 0.5 ? l * (1 + s) : l + s - l * s;
+    var p = 2 * l - q;
+    r = hue2rgb(p, q, h + 1 / 3);
+    g = hue2rgb(p, q, h);
+    b = hue2rgb(p, q, h - 1 / 3);
+  }
+  return [Math.round(r * 255), Math.round(g * 255), Math.round(b * 255)];
+}
+
+let drawRing = function(ctx, width, height) {
+  // 画圆环
+  var radius = width / 2;
+  var toRad = (2 * Math.PI) / 360;
+  var step = 0.1;
+  for (var i = 0; i < 360; i += step) {
+    var rad = i * toRad;
+    var color = hslToRgb(i / 360, 1, 0.5);
+    ctx.strokeStyle = `rgb(${color[0]},${color[1]},${color[2]})`;
+    ctx.beginPath();
+    ctx.moveTo(radius, radius);
+    ctx.lineTo(radius + radius * Math.cos(rad), radius + radius * Math.sin(rad));
+    ctx.stroke();
+  }
+
+  ctx.fillStyle = 'rgb(255, 255, 255)';
+  ctx.strokeStyle = 'rgb(0, 255, 255)';
+  ctx.beginPath();
+  ctx.arc(radius, radius, radius * 0.65, 0, Math.PI * 2, true);
+  ctx.closePath();
+  ctx.fill();
+  ctx.draw();
+};
+
+let drawSlider = function(ctx, width, height, angle) {
+  var radius = width / 2;
+
+  ctx.save();
+  ctx.clearRect(0, 0, width, height);
+  ctx.translate(width / 2, height / 2);
+
+  var color = hslToRgb(angle, 1, 0.5);
+
+  ctx.fillStyle = `rgb(${color[0]},${color[1]},${color[2]})`;
+  ctx.beginPath();
+  ctx.arc(0, 0, radius * 0.3, 0, Math.PI * 2, true);
+  ctx.closePath();
+  ctx.fill();
+  ctx.rotate((angle * 360) * Math.PI / 180);
+
+  ctx.beginPath()
+  ctx.setLineWidth(height * 0.015);
+  //圆心的 x 坐标  , 圆心的 Y 坐标 , 圆的半径
+  ctx.arc(height * 0.41, 0, 17, 0, 2 * Math.PI);
+
+  const grd = ctx.createCircularGradient(height * 0.41, 0, 17)
+  grd.addColorStop(0, '#fff');
+  grd.addColorStop(0.2, '#fff');
+  grd.addColorStop(.7, '#bfbfbf');
+  grd.addColorStop(1, '#666');
+
+  // Fill with gradient
+  ctx.setFillStyle(grd);
+  ctx.fill();
+  // ctx.strokeStyle = 'rgb(255, 255, 255)';
+  // ctx.stroke()
+
+  ctx.draw();
+  ctx.restore();
+};
+
+
+module.exports = {
+  rgb2hsl: rgb2hsl,
+  hslToRgb: hslToRgb,
+  drawRing: drawRing,
+  drawSlider: drawSlider,
+}