saturation.vue
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<template>
<div
:class="[prefixCls + '-saturation-wrapper']"
tabindex="0"
@keydown.esc="handleEscape"
@click="$el.focus()"
@keydown.left="handleLeft"
@keydown.right="handleRight"
@keydown.up="handleUp"
@keydown.down="handleDown"
>
<div
ref="container"
:style="bgColorStyle"
:class="[prefixCls + '-saturation']"
@mousedown="handleMouseDown">
<div :class="[prefixCls + '-saturation--white']"></div>
<div :class="[prefixCls + '-saturation--black']"></div>
<div
:style="pointerStyle"
:class="[prefixCls + '-saturation-pointer']">
<div :class="[prefixCls + '-saturation-circle']"></div>
</div>
</div>
</div>
</template>
<script>
import HSAMixin from './hsaMixin';
import Prefixes from './prefixMixin';
import {clamp, getIncrement} from './utils';
export default {
name: 'Saturation',
mixins: [HSAMixin, Prefixes],
data() {
const normalStep = 0.01;
return {
left: -normalStep,
right: normalStep,
up: normalStep,
down: -normalStep,
multiplier: 10,
powerKey: 'shiftKey',
};
},
computed: {
bgColorStyle() {
return {background: `hsl(${this.value.hsv.h}, 100%, 50%)`};
},
pointerStyle() {
return {top: `${-(this.value.hsv.v * 100) + 1 + 100}%`, left: `${this.value.hsv.s * 100}%`};
},
},
methods: {
change(h, s, v, a) {
this.$emit('change', {h, s, v, a, source: 'hsva'});
},
handleSlide(e, direction, key) {
e.preventDefault();
e.stopPropagation();
const isPowerKey = e[this.powerKey];
const increment = isPowerKey ? direction * this.multiplier : direction;
const {h, s, v, a} = this.value.hsv;
const saturation = clamp(s + getIncrement(key, ['left', 'right'], increment), 0, 1);
const bright = clamp(v + getIncrement(key, ['up', 'down'], increment), 0, 1);
this.change(h, saturation, bright, a);
},
handleChange(e) {
e.preventDefault();
e.stopPropagation();
const {clientWidth, clientHeight} = this.$refs.container;
const left = clamp(this.getLeft(e), 0, clientWidth);
const top = clamp(this.getTop(e), 0, clientHeight);
const saturation = left / clientWidth;
const bright = clamp(1 - top / clientHeight, 0, 1);
this.change(this.value.hsv.h, saturation, bright, this.value.hsv.a);
},
handleMouseDown(e) {
HSAMixin.methods.handleMouseDown.call(this, e);
window.addEventListener('mouseup', this.handleChange, false);
},
unbindEventListeners(e) {
HSAMixin.methods.unbindEventListeners.call(this, e);
window.removeEventListener('mouseup', this.handleChange);
},
},
};
</script>