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<template> |
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<svg :width="size" :height="size" viewBox="0 0 100 100"> |
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<!-- 背景圆 --> |
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<circle cx="50" cy="50" r="50" fill="#eee"/> |
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<!-- 使用率扇形 --> |
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<path :d="arcPath" fill="#1C134B"/> |
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</svg> |
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</template> |
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<script setup> |
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import { computed } from 'vue'; |
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const props = defineProps({ |
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used: { type: Number, required: true }, |
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total: { type: Number, required: true }, |
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size: { type: Number, default: 150 } |
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}); |
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const percentage = computed(() => { |
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if (props.total === 0) return 0; |
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return (props.used / props.total) * 100; |
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}); |
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const arcPath = computed(() => { |
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if (percentage.value >= 100) return ''; |
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const angle = (percentage.value * 360) / 100; |
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const radians = (angle - 90) * Math.PI / 180; |
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const x = 50 + 50 * Math.cos(radians); |
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const y = 50 + 50 * Math.sin(radians); |
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const largeArc = angle > 180 ? 1 : 0; |
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return `M 50 50 L 50 0 A 50 50 0 ${largeArc} 1 ${x} ${y} L 50 50 Z`; |
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}); |
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</script> |