File size: 4,992 Bytes
89ce340 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 |
<template>
<div
class="shape-create-canvas"
ref="shapeCanvasRef"
@mousedown.stop="$event => addPoint($event)"
@mousemove="$event => updateMousePosition($event)"
@contextmenu.stop.prevent="close()"
>
<svg overflow="visible">
<path
:d="path"
stroke="#d14424"
:fill="closed ? 'rgba(226, 83, 77, 0.15)' : 'none'"
stroke-width="2"
></path>
</svg>
</div>
</template>
<script lang="ts" setup>
import { computed, onMounted, onUnmounted, ref } from 'vue'
import { storeToRefs } from 'pinia'
import { useKeyboardStore, useMainStore, useSlidesStore } from '@/store'
import type { CreateCustomShapeData } from '@/types/edit'
import { KEYS } from '@/configs/hotkey'
import message from '@/utils/message'
const emit = defineEmits<{
(event: 'created', payload: CreateCustomShapeData): void
}>()
const mainStore = useMainStore()
const { ctrlOrShiftKeyActive } = storeToRefs(useKeyboardStore())
const { theme } = storeToRefs(useSlidesStore())
const shapeCanvasRef = ref<HTMLElement>()
const isMouseDown = ref(false)
const offset = ref({
x: 0,
y: 0,
})
onMounted(() => {
if (!shapeCanvasRef.value) return
const { x, y } = shapeCanvasRef.value.getBoundingClientRect()
offset.value = { x, y }
})
const mousePosition = ref<[number, number] | null>(null)
const points = ref<[number, number][]>([])
const closed = ref(false)
const getPoint = (e: MouseEvent, custom = false) => {
let pageX = e.pageX - offset.value.x
let pageY = e.pageY - offset.value.y
if (custom) return { pageX, pageY }
if (ctrlOrShiftKeyActive.value && points.value.length) {
const [lastPointX, lastPointY] = points.value[points.value.length - 1]
if (Math.abs(lastPointX - pageX) - Math.abs(lastPointY - pageY) > 0) {
pageY = lastPointY
}
else pageX = lastPointX
}
return { pageX, pageY }
}
const updateMousePosition = (e: MouseEvent) => {
if (isMouseDown.value) {
const { pageX, pageY } = getPoint(e, true)
points.value.push([pageX, pageY])
mousePosition.value = null
return
}
const { pageX, pageY } = getPoint(e)
mousePosition.value = [pageX, pageY]
if (points.value.length >= 2) {
const [firstPointX, firstPointY] = points.value[0]
if (Math.abs(firstPointX - pageX) < 5 && Math.abs(firstPointY - pageY) < 5) {
closed.value = true
}
else closed.value = false
}
else closed.value = false
}
const path = computed(() => {
let d = ''
for (let i = 0; i < points.value.length; i++) {
const point = points.value[i]
if (i === 0) d += `M ${point[0]} ${point[1]} `
else d += `L ${point[0]} ${point[1]} `
}
if (points.value.length && mousePosition.value) {
d += `L ${mousePosition.value[0]} ${mousePosition.value[1]}`
}
return d
})
const getCreateData = (close = true) => {
const xList = points.value.map(item => item[0])
const yList = points.value.map(item => item[1])
const minX = Math.min(...xList)
const minY = Math.min(...yList)
const maxX = Math.max(...xList)
const maxY = Math.max(...yList)
const formatedPoints = points.value.map(point => {
return [point[0] - minX, point[1] - minY]
})
let path = ''
for (let i = 0; i < formatedPoints.length; i++) {
const point = formatedPoints[i]
if (i === 0) path += `M ${point[0]} ${point[1]} `
else path += `L ${point[0]} ${point[1]} `
}
if (close) path += 'Z'
const start: [number, number] = [minX + offset.value.x, minY + offset.value.y]
const end: [number, number] = [maxX + offset.value.x, maxY + offset.value.y]
const viewBox: [number, number] = [maxX - minX, maxY - minY]
return {
start,
end,
path,
viewBox,
}
}
const addPoint = (e: MouseEvent) => {
const { pageX, pageY } = getPoint(e)
isMouseDown.value = true
if (closed.value) emit('created', getCreateData())
else points.value.push([pageX, pageY])
document.onmouseup = () => {
isMouseDown.value = false
}
}
const close = () => {
mainStore.setCreatingCustomShapeState(false)
}
const create = () => {
emit('created', {
...getCreateData(false),
fill: 'rgba(0, 0, 0, 0)',
outline: {
width: 2,
color: theme.value.themeColors[0],
style: 'solid',
},
})
close()
}
const keydownListener = (e: KeyboardEvent) => {
const key = e.key.toUpperCase()
if (key === KEYS.ESC) close()
if (key === KEYS.ENTER) create()
}
onMounted(() => {
message.success('点击绘制任意形状，首尾闭合完成绘制，按 ESC 键或鼠标右键取消，按 ENTER 键提前完成', {
duration: 0,
})
document.addEventListener('keydown', keydownListener)
})
onUnmounted(() => {
document.removeEventListener('keydown', keydownListener)
message.closeAll()
})
</script>
<style lang="scss" scoped>
.shape-create-canvas {
position: absolute;
top: 0;
left: 0;
width: 100%;
height: 100%;
z-index: 2;
cursor: crosshair;
svg {
width: 100%;
height: 100%;
overflow: visible;
}
}
</style> |