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<template>
<svg class="grid-lines">
<path
:style="{
transform: `scale(${canvasScale})`,
}"
:d="path"
fill="none"
:stroke="gridColor"
stroke-width="0.3"
stroke-dasharray="5"
></path>
</svg>
</template>
<script lang="ts" setup>
import { computed } from 'vue'
import tinycolor from 'tinycolor2'
import { storeToRefs } from 'pinia'
import { useMainStore, useSlidesStore } from '@/store'
import type { SlideBackground } from '@/types/slides'
const { canvasScale, gridLineSize } = storeToRefs(useMainStore())
const { currentSlide, viewportRatio, viewportSize } = storeToRefs(useSlidesStore())
const background = computed<SlideBackground | undefined>(() => currentSlide.value?.background)
// 计算网格线的颜色，避免与背景的颜色太接近
const gridColor = computed(() => {
const bgColor = background.value?.color || '#fff'
const colorList = ['#000', '#fff']
return tinycolor.mostReadable(bgColor, colorList, { includeFallbackColors: true }).setAlpha(.5).toRgbString()
})
// 网格路径
const path = computed(() => {
const maxX = viewportSize.value
const maxY = viewportSize.value * viewportRatio.value
let p = ''
for (let i = 0; i <= Math.floor(maxY / gridLineSize.value); i++) {
p += `M0 ${i * gridLineSize.value} L${maxX} ${i * gridLineSize.value} `
}
for (let i = 0; i <= Math.floor(maxX / gridLineSize.value); i++) {
p += `M${i * gridLineSize.value} 0 L${i * gridLineSize.value} ${maxY} `
}
return p
})
</script>
<style lang="scss" scoped>
.grid-lines {
width: 100%;
height: 100%;
overflow: visible;
z-index: 999;
pointer-events: none;
@include absolute-0();
}
</style> |