<template>
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<div
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:class="[
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'el-color-picker',
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colorDisabled ? 'is-disabled' : '',
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colorSize ? `el-color-picker--${ colorSize }` : ''
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]"
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v-clickoutside="hide">
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<div class="el-color-picker__mask" v-if="colorDisabled"></div>
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<div class="el-color-picker__trigger" @click="handleTrigger">
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<span class="el-color-picker__color" :class="{ 'is-alpha': showAlpha }">
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<span class="el-color-picker__color-inner"
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:style="{
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backgroundColor: displayedColor
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}"></span>
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<span class="el-color-picker__empty el-icon-close" v-if="!value && !showPanelColor"></span>
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</span>
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<span class="el-color-picker__icon el-icon-arrow-down" v-show="value || showPanelColor"></span>
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</div>
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<picker-dropdown
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ref="dropdown"
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:class="['el-color-picker__panel', popperClass || '']"
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v-model="showPicker"
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@pick="confirmValue"
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@clear="clearValue"
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:color="color"
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:show-alpha="showAlpha"
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:predefine="predefine">
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</picker-dropdown>
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</div>
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</template>
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<script>
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import Color from './color';
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import PickerDropdown from './components/picker-dropdown.vue';
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import Clickoutside from 'element-ui/src/utils/clickoutside';
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import Emitter from 'element-ui/src/mixins/emitter';
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export default {
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name: 'ElColorPicker',
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mixins: [Emitter],
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props: {
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value: String,
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showAlpha: Boolean,
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colorFormat: String,
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disabled: Boolean,
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size: String,
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popperClass: String,
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predefine: Array
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},
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inject: {
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elForm: {
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default: ''
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},
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elFormItem: {
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default: ''
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}
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},
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directives: { Clickoutside },
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computed: {
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displayedColor() {
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if (!this.value && !this.showPanelColor) {
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return 'transparent';
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}
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return this.displayedRgb(this.color, this.showAlpha);
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},
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_elFormItemSize() {
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return (this.elFormItem || {}).elFormItemSize;
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},
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colorSize() {
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return this.size || this._elFormItemSize || (this.$ELEMENT || {}).size;
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},
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colorDisabled() {
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return this.disabled || (this.elForm || {}).disabled;
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}
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},
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watch: {
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value(val) {
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if (!val) {
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this.showPanelColor = false;
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} else if (val && val !== this.color.value) {
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this.color.fromString(val);
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}
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},
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color: {
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deep: true,
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handler() {
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this.showPanelColor = true;
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}
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},
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displayedColor(val) {
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if (!this.showPicker) return;
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const currentValueColor = new Color({
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enableAlpha: this.showAlpha,
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format: this.colorFormat
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});
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currentValueColor.fromString(this.value);
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const currentValueColorRgb = this.displayedRgb(currentValueColor, this.showAlpha);
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if (val !== currentValueColorRgb) {
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this.$emit('active-change', val);
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}
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}
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},
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methods: {
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handleTrigger() {
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if (this.colorDisabled) return;
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this.showPicker = !this.showPicker;
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},
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confirmValue() {
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const value = this.color.value;
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this.$emit('input', value);
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this.$emit('change', value);
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this.dispatch('ElFormItem', 'el.form.change', value);
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this.showPicker = false;
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},
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clearValue() {
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this.$emit('input', null);
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this.$emit('change', null);
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if (this.value !== null) {
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this.dispatch('ElFormItem', 'el.form.change', null);
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}
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this.showPanelColor = false;
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this.showPicker = false;
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this.resetColor();
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},
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hide() {
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this.showPicker = false;
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this.resetColor();
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},
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resetColor() {
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this.$nextTick(_ => {
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if (this.value) {
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this.color.fromString(this.value);
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} else {
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this.showPanelColor = false;
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}
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});
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},
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displayedRgb(color, showAlpha) {
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if (!(color instanceof Color)) {
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throw Error('color should be instance of Color Class');
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}
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const { r, g, b } = color.toRgb();
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return showAlpha
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? `rgba(${ r }, ${ g }, ${ b }, ${ color.get('alpha') / 100 })`
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: `rgb(${ r }, ${ g }, ${ b })`;
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}
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},
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mounted() {
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const value = this.value;
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if (value) {
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this.color.fromString(value);
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}
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this.popperElm = this.$refs.dropdown.$el;
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},
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data() {
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const color = new Color({
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enableAlpha: this.showAlpha,
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format: this.colorFormat
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});
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return {
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color,
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showPicker: false,
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showPanelColor: false
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};
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},
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components: {
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PickerDropdown
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}
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};
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</script>
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