<template>
|
<div class="el-color-hue-slider" :class="{ 'is-vertical': vertical }">
|
<div class="el-color-hue-slider__bar" @click="handleClick" ref="bar"></div>
|
<div class="el-color-hue-slider__thumb"
|
:style="{
|
left: thumbLeft + 'px',
|
top: thumbTop + 'px'
|
}"
|
ref="thumb">
|
</div>
|
</div>
|
</template>
|
|
<script>
|
import draggable from '../draggable';
|
|
export default {
|
name: 'el-color-hue-slider',
|
|
props: {
|
color: {
|
required: true
|
},
|
|
vertical: Boolean
|
},
|
|
data() {
|
return {
|
thumbLeft: 0,
|
thumbTop: 0
|
};
|
},
|
|
computed: {
|
hueValue() {
|
const hue = this.color.get('hue');
|
return hue;
|
}
|
},
|
|
watch: {
|
hueValue() {
|
this.update();
|
}
|
},
|
|
methods: {
|
handleClick(event) {
|
const thumb = this.$refs.thumb;
|
const target = event.target;
|
|
if (target !== thumb) {
|
this.handleDrag(event);
|
}
|
},
|
|
handleDrag(event) {
|
const rect = this.$el.getBoundingClientRect();
|
const { thumb } = this.$refs;
|
let hue;
|
|
if (!this.vertical) {
|
let left = event.clientX - rect.left;
|
left = Math.min(left, rect.width - thumb.offsetWidth / 2);
|
left = Math.max(thumb.offsetWidth / 2, left);
|
|
hue = Math.round((left - thumb.offsetWidth / 2) / (rect.width - thumb.offsetWidth) * 360);
|
} else {
|
let top = event.clientY - rect.top;
|
top = Math.min(top, rect.height - thumb.offsetHeight / 2);
|
top = Math.max(thumb.offsetHeight / 2, top);
|
|
hue = Math.round((top - thumb.offsetHeight / 2) / (rect.height - thumb.offsetHeight) * 360);
|
}
|
|
this.color.set('hue', hue);
|
},
|
|
getThumbLeft() {
|
if (this.vertical) return 0;
|
const el = this.$el;
|
const hue = this.color.get('hue');
|
|
if (!el) return 0;
|
const thumb = this.$refs.thumb;
|
return Math.round(hue * (el.offsetWidth - thumb.offsetWidth / 2) / 360);
|
},
|
|
getThumbTop() {
|
if (!this.vertical) return 0;
|
const el = this.$el;
|
const hue = this.color.get('hue');
|
|
if (!el) return 0;
|
const thumb = this.$refs.thumb;
|
return Math.round(hue * (el.offsetHeight - thumb.offsetHeight / 2) / 360);
|
},
|
|
update() {
|
this.thumbLeft = this.getThumbLeft();
|
this.thumbTop = this.getThumbTop();
|
}
|
},
|
|
mounted() {
|
const { bar, thumb } = this.$refs;
|
|
const dragConfig = {
|
drag: (event) => {
|
this.handleDrag(event);
|
},
|
end: (event) => {
|
this.handleDrag(event);
|
}
|
};
|
|
draggable(bar, dragConfig);
|
draggable(thumb, dragConfig);
|
this.update();
|
}
|
};
|
</script>
|
