update chart dashboard

2026-10-16 10:29:42 +07:00
parent 60d32a88e9
commit 24725e3df1
4 changed files with 68 additions and 57 deletions
@@ -81,6 +81,29 @@ window.config = {
  enableMenuLocalStorage: true // Enable menu state with local storage support
 };

+// Choose the label color with the higher contrast against each chart slice.
+window.config.chartTextColor = function (color) {
+  let hex = String(color || '').trim().replace(/^#/, '');
+  if (/^[0-9a-f]{3}$/i.test(hex)) {
+    hex = hex.split('').map(value => value + value).join('');
+  }
+  if (!/^[0-9a-f]{6}$/i.test(hex)) return '#212529';
+
+  const luminance = function (value) {
+    const channels = value.match(/../g).map(channel => {
+      const srgb = parseInt(channel, 16) / 255;
+      return srgb <= 0.04045 ? srgb / 12.92 : Math.pow((srgb + 0.055) / 1.055, 2.4);
+    });
+    return channels[0] * 0.2126 + channels[1] * 0.7152 + channels[2] * 0.0722;
+  };
+  const background = luminance(hex);
+  const dark = luminance('212529');
+  const darkContrast = (Math.max(background, dark) + 0.05) / (Math.min(background, dark) + 0.05);
+  const lightContrast = 1.05 / (background + 0.05);
+
+  return darkContrast >= lightContrast ? '#212529' : '#ffffff';
+};
+
 window.assetsPath = document.documentElement.getAttribute('data-assets-path');
 window.templateName = document.documentElement.getAttribute('data-template');