first

packages/color-picker/index.js

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+import ColorPicker from './src/main';
+
+/* istanbul ignore next */
+ColorPicker.install = function(Vue) {
+  Vue.component(ColorPicker.name, ColorPicker);
+};
+
+export default ColorPicker;

packages/color-picker/src/color.js

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+const hsv2hsl = function(hue, sat, val) {
+  return [
+    hue,
+    (sat * val / ((hue = (2 - sat) * val) < 1 ? hue : 2 - hue)) || 0,
+    hue / 2
+  ];
+};
+
+// Need to handle 1.0 as 100%, since once it is a number, there is no difference between it and 1
+// <http://stackoverflow.com/questions/7422072/javascript-how-to-detect-number-as-a-decimal-including-1-0>
+const isOnePointZero = function(n) {
+  return typeof n === 'string' && n.indexOf('.') !== -1 && parseFloat(n) === 1;
+};
+
+const isPercentage = function(n) {
+  return typeof n === 'string' && n.indexOf('%') !== -1;
+};
+
+// Take input from [0, n] and return it as [0, 1]
+const bound01 = function(value, max) {
+  if (isOnePointZero(value)) value = '100%';
+
+  const processPercent = isPercentage(value);
+  value = Math.min(max, Math.max(0, parseFloat(value)));
+
+  // Automatically convert percentage into number
+  if (processPercent) {
+    value = parseInt(value * max, 10) / 100;
+  }
+
+  // Handle floating point rounding errors
+  if ((Math.abs(value - max) < 0.000001)) {
+    return 1;
+  }
+
+  // Convert into [0, 1] range if it isn't already
+  return (value % max) / parseFloat(max);
+};
+
+const INT_HEX_MAP = { 10: 'A', 11: 'B', 12: 'C', 13: 'D', 14: 'E', 15: 'F' };
+
+const toHex = function({ r, g, b }) {
+  const hexOne = function(value) {
+    value = Math.min(Math.round(value), 255);
+    const high = Math.floor(value / 16);
+    const low = value % 16;
+    return '' + (INT_HEX_MAP[high] || high) + (INT_HEX_MAP[low] || low);
+  };
+
+  if (isNaN(r) || isNaN(g) || isNaN(b)) return '';
+
+  return '#' + hexOne(r) + hexOne(g) + hexOne(b);
+};
+
+const HEX_INT_MAP = { A: 10, B: 11, C: 12, D: 13, E: 14, F: 15 };
+
+const parseHexChannel = function(hex) {
+  if (hex.length === 2) {
+    return (HEX_INT_MAP[hex[0].toUpperCase()] || +hex[0]) * 16 + (HEX_INT_MAP[hex[1].toUpperCase()] || +hex[1]);
+  }
+
+  return HEX_INT_MAP[hex[1].toUpperCase()] || +hex[1];
+};
+
+const hsl2hsv = function(hue, sat, light) {
+  sat = sat / 100;
+  light = light / 100;
+  let smin = sat;
+  const lmin = Math.max(light, 0.01);
+  let sv;
+  let v;
+
+  light *= 2;
+  sat *= (light <= 1) ? light : 2 - light;
+  smin *= lmin <= 1 ? lmin : 2 - lmin;
+  v = (light + sat) / 2;
+  sv = light === 0 ? (2 * smin) / (lmin + smin) : (2 * sat) / (light + sat);
+
+  return {
+    h: hue,
+    s: sv * 100,
+    v: v * 100
+  };
+};
+
+// `rgbToHsv`
+// Converts an RGB color value to HSV
+// *Assumes:* r, g, and b are contained in the set [0, 255] or [0, 1]
+// *Returns:* { h, s, v } in [0,1]
+const rgb2hsv = function(r, g, b) {
+  r = bound01(r, 255);
+  g = bound01(g, 255);
+  b = bound01(b, 255);
+
+  const max = Math.max(r, g, b);
+  const min = Math.min(r, g, b);
+  let h, s;
+  let v = max;
+
+  const d = max - min;
+  s = max === 0 ? 0 : d / max;
+
+  if (max === min) {
+    h = 0; // achromatic
+  } else {
+    switch (max) {
+      case r:
+        h = (g - b) / d + (g < b ? 6 : 0);
+        break;
+      case g:
+        h = (b - r) / d + 2;
+        break;
+      case b:
+        h = (r - g) / d + 4;
+        break;
+    }
+    h /= 6;
+  }
+
+  return { h: h * 360, s: s * 100, v: v * 100 };
+};
+
+// `hsvToRgb`
+// Converts an HSV color value to RGB.
+// *Assumes:* h is contained in [0, 1] or [0, 360] and s and v are contained in [0, 1] or [0, 100]
+// *Returns:* { r, g, b } in the set [0, 255]
+const hsv2rgb = function(h, s, v) {
+  h = bound01(h, 360) * 6;
+  s = bound01(s, 100);
+  v = bound01(v, 100);
+
+  const i = Math.floor(h);
+  const f = h - i;
+  const p = v * (1 - s);
+  const q = v * (1 - f * s);
+  const t = v * (1 - (1 - f) * s);
+  const mod = i % 6;
+  const r = [v, q, p, p, t, v][mod];
+  const g = [t, v, v, q, p, p][mod];
+  const b = [p, p, t, v, v, q][mod];
+
+  return {
+    r: Math.round(r * 255),
+    g: Math.round(g * 255),
+    b: Math.round(b * 255)
+  };
+};
+
+export default class Color {
+  constructor(options) {
+    this._hue = 0;
+    this._saturation = 100;
+    this._value = 100;
+    this._alpha = 100;
+
+    this.enableAlpha = false;
+    this.format = 'hex';
+    this.value = '';
+
+    options = options || {};
+
+    for (let option in options) {
+      if (options.hasOwnProperty(option)) {
+        this[option] = options[option];
+      }
+    }
+
+    this.doOnChange();
+  }
+
+  set(prop, value) {
+    if (arguments.length === 1 && typeof prop === 'object') {
+      for (let p in prop) {
+        if (prop.hasOwnProperty(p)) {
+          this.set(p, prop[p]);
+        }
+      }
+
+      return;
+    }
+
+    this['_' + prop] = value;
+    this.doOnChange();
+  }
+
+  get(prop) {
+    return this['_' + prop];
+  }
+
+  toRgb() {
+    return hsv2rgb(this._hue, this._saturation, this._value);
+  }
+
+  fromString(value) {
+    if (!value) {
+      this._hue = 0;
+      this._saturation = 100;
+      this._value = 100;
+
+      this.doOnChange();
+      return;
+    }
+
+    const fromHSV = (h, s, v) => {
+      this._hue = Math.max(0, Math.min(360, h));
+      this._saturation = Math.max(0, Math.min(100, s));
+      this._value = Math.max(0, Math.min(100, v));
+
+      this.doOnChange();
+    };
+
+    if (value.indexOf('hsl') !== -1) {
+      const parts = value.replace(/hsla|hsl|\(|\)/gm, '')
+        .split(/\s|,/g).filter((val) => val !== '').map((val, index) => index > 2 ? parseFloat(val) : parseInt(val, 10));
+
+      if (parts.length === 4) {
+        this._alpha = Math.floor(parseFloat(parts[3]) * 100);
+      } else if (parts.length === 3) {
+        this._alpha = 100;
+      }
+      if (parts.length >= 3) {
+        const { h, s, v } = hsl2hsv(parts[0], parts[1], parts[2]);
+        fromHSV(h, s, v);
+      }
+    } else if (value.indexOf('hsv') !== -1) {
+      const parts = value.replace(/hsva|hsv|\(|\)/gm, '')
+        .split(/\s|,/g).filter((val) => val !== '').map((val, index) => index > 2 ? parseFloat(val) : parseInt(val, 10));
+
+      if (parts.length === 4) {
+        this._alpha = Math.floor(parseFloat(parts[3]) * 100);
+      } else if (parts.length === 3) {
+        this._alpha = 100;
+      }
+      if (parts.length >= 3) {
+        fromHSV(parts[0], parts[1], parts[2]);
+      }
+    } else if (value.indexOf('rgb') !== -1) {
+      const parts = value.replace(/rgba|rgb|\(|\)/gm, '')
+        .split(/\s|,/g).filter((val) => val !== '').map((val, index) => index > 2 ? parseFloat(val) : parseInt(val, 10));
+
+      if (parts.length === 4) {
+        this._alpha = Math.floor(parseFloat(parts[3]) * 100);
+      } else if (parts.length === 3) {
+        this._alpha = 100;
+      }
+      if (parts.length >= 3) {
+        const { h, s, v } = rgb2hsv(parts[0], parts[1], parts[2]);
+        fromHSV(h, s, v);
+      }
+    } else if (value.indexOf('#') !== -1) {
+      const hex = value.replace('#', '').trim();
+      if (!/^(?:[0-9a-fA-F]{3}){1,2}|[0-9a-fA-F]{8}$/.test(hex)) return;
+      let r, g, b;
+
+      if (hex.length === 3) {
+        r = parseHexChannel(hex[0] + hex[0]);
+        g = parseHexChannel(hex[1] + hex[1]);
+        b = parseHexChannel(hex[2] + hex[2]);
+      } else if (hex.length === 6 || hex.length === 8) {
+        r = parseHexChannel(hex.substring(0, 2));
+        g = parseHexChannel(hex.substring(2, 4));
+        b = parseHexChannel(hex.substring(4, 6));
+      }
+
+      if (hex.length === 8) {
+        this._alpha = Math.floor(parseHexChannel(hex.substring(6)) / 255 * 100);
+      } else if (hex.length === 3 || hex.length === 6) {
+        this._alpha = 100;
+      }
+
+      const { h, s, v } = rgb2hsv(r, g, b);
+      fromHSV(h, s, v);
+    }
+  }
+
+  compare(color) {
+    return Math.abs(color._hue - this._hue) < 2 &&
+      Math.abs(color._saturation - this._saturation) < 1 &&
+      Math.abs(color._value - this._value) < 1 &&
+      Math.abs(color._alpha - this._alpha) < 1;
+  }
+
+  doOnChange() {
+    const { _hue, _saturation, _value, _alpha, format } = this;
+
+    if (this.enableAlpha) {
+      switch (format) {
+        case 'hsl':
+          const hsl = hsv2hsl(_hue, _saturation / 100, _value / 100);
+          this.value = `hsla(${ _hue }, ${ Math.round(hsl[1] * 100) }%, ${ Math.round(hsl[2] * 100) }%, ${ _alpha / 100})`;
+          break;
+        case 'hsv':
+          this.value = `hsva(${ _hue }, ${ Math.round(_saturation) }%, ${ Math.round(_value) }%, ${ _alpha / 100})`;
+          break;
+        default:
+          const { r, g, b } = hsv2rgb(_hue, _saturation, _value);
+          this.value = `rgba(${r}, ${g}, ${b}, ${ _alpha / 100 })`;
+      }
+    } else {
+      switch (format) {
+        case 'hsl':
+          const hsl = hsv2hsl(_hue, _saturation / 100, _value / 100);
+          this.value = `hsl(${ _hue }, ${ Math.round(hsl[1] * 100) }%, ${ Math.round(hsl[2] * 100) }%)`;
+          break;
+        case 'hsv':
+          this.value = `hsv(${ _hue }, ${ Math.round(_saturation) }%, ${ Math.round(_value) }%)`;
+          break;
+        case 'rgb':
+          const { r, g, b } = hsv2rgb(_hue, _saturation, _value);
+          this.value = `rgb(${r}, ${g}, ${b})`;
+          break;
+        default:
+          this.value = toHex(hsv2rgb(_hue, _saturation, _value));
+      }
+    }
+  }
+};

packages/color-picker/src/components/alpha-slider.vue

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+<template>
+  <div class="el-color-alpha-slider" :class="{ 'is-vertical': vertical }">
+    <div class="el-color-alpha-slider__bar"
+         @click="handleClick"
+         ref="bar"
+         :style="{
+           background: background
+         }">
+    </div>
+    <div class="el-color-alpha-slider__thumb"
+         ref="thumb"
+         :style="{
+           left: thumbLeft + 'px',
+           top: thumbTop + 'px'
+         }">
+    </div>
+  </div>
+</template>
+
+<script>
+  import draggable from '../draggable';
+
+  export default {
+    name: 'el-color-alpha-slider',
+
+    props: {
+      color: {
+        required: true
+      },
+      vertical: Boolean
+    },
+
+    watch: {
+      'color._alpha'() {
+        this.update();
+      },
+
+      'color.value'() {
+        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.$refs;
+
+        if (!this.vertical) {
+          let left = event.clientX - rect.left;
+          left = Math.max(thumb.offsetWidth / 2, left);
+          left = Math.min(left, rect.width - thumb.offsetWidth / 2);
+
+          this.color.set('alpha', Math.round((left - thumb.offsetWidth / 2) / (rect.width - thumb.offsetWidth) * 100));
+        } else {
+          let top = event.clientY - rect.top;
+          top = Math.max(thumb.offsetHeight / 2, top);
+          top = Math.min(top, rect.height - thumb.offsetHeight / 2);
+
+          this.color.set('alpha', Math.round((top - thumb.offsetHeight / 2) / (rect.height - thumb.offsetHeight) * 100));
+        }
+      },
+
+      getThumbLeft() {
+        if (this.vertical) return 0;
+        const el = this.$el;
+        const alpha = this.color._alpha;
+
+        if (!el) return 0;
+        const thumb = this.$refs.thumb;
+        return Math.round(alpha * (el.offsetWidth - thumb.offsetWidth / 2) / 100);
+      },
+
+      getThumbTop() {
+        if (!this.vertical) return 0;
+        const el = this.$el;
+        const alpha = this.color._alpha;
+
+        if (!el) return 0;
+        const thumb = this.$refs.thumb;
+        return Math.round(alpha * (el.offsetHeight - thumb.offsetHeight / 2) / 100);
+      },
+
+      getBackground() {
+        if (this.color && this.color.value) {
+          const { r, g, b } = this.color.toRgb();
+          return `linear-gradient(to right, rgba(${r}, ${g}, ${b}, 0) 0%, rgba(${r}, ${g}, ${b}, 1) 100%)`;
+        }
+        return null;
+      },
+
+      update() {
+        this.thumbLeft = this.getThumbLeft();
+        this.thumbTop = this.getThumbTop();
+        this.background = this.getBackground();
+      }
+    },
+
+    data() {
+      return {
+        thumbLeft: 0,
+        thumbTop: 0,
+        background: null
+      };
+    },
+
+    mounted() {
+      const { bar, thumb } = this.$refs;
+
+      const dragConfig = {
+        drag: (event) => {
+          this.handleDrag(event);
+        },
+        end: (event) => {
+          this.handleDrag(event);
+        }
+      };
+
+      draggable(bar, dragConfig);
+      draggable(thumb, dragConfig);
+      this.update();
+    }
+  };
+</script>

packages/color-picker/src/components/hue-slider.vue

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+<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>

packages/color-picker/src/components/picker-dropdown.vue

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+<template>
+  <transition name="el-zoom-in-top" @after-leave="doDestroy">
+    <div
+      class="el-color-dropdown"
+      v-show="showPopper">
+      <div class="el-color-dropdown__main-wrapper">
+        <hue-slider ref="hue" :color="color" vertical style="float: right;"></hue-slider>
+        <sv-panel ref="sl" :color="color"></sv-panel>
+      </div>
+      <alpha-slider v-if="showAlpha" ref="alpha" :color="color"></alpha-slider>
+      <predefine v-if="predefine" :color="color" :colors="predefine"></predefine>
+      <div class="el-color-dropdown__btns">
+        <span class="el-color-dropdown__value">
+          <el-input
+            v-model="customInput"
+            @keyup.native.enter="handleConfirm"
+            @blur="handleConfirm"
+            :validate-event="false"
+            size="mini">
+          </el-input>
+        </span>
+        <el-button
+          size="mini"
+          type="text"
+          class="el-color-dropdown__link-btn"
+          @click="$emit('clear')">
+          {{ t('el.colorpicker.clear') }}
+        </el-button>
+        <el-button
+          plain
+          size="mini"
+          class="el-color-dropdown__btn"
+          @click="confirmValue">
+          {{ t('el.colorpicker.confirm') }}
+        </el-button>
+      </div>
+    </div>
+  </transition>
+</template>
+
+<script>
+  import SvPanel from './sv-panel';
+  import HueSlider from './hue-slider';
+  import AlphaSlider from './alpha-slider';
+  import Predefine from './predefine';
+  import Popper from 'element-ui/src/utils/vue-popper';
+  import Locale from 'element-ui/src/mixins/locale';
+  import ElInput from 'element-ui/packages/input';
+  import ElButton from 'element-ui/packages/button';
+
+  export default {
+    name: 'el-color-picker-dropdown',
+
+    mixins: [Popper, Locale],
+
+    components: {
+      SvPanel,
+      HueSlider,
+      AlphaSlider,
+      ElInput,
+      ElButton,
+      Predefine
+    },
+
+    props: {
+      color: {
+        required: true
+      },
+      showAlpha: Boolean,
+      predefine: Array
+    },
+
+    data() {
+      return {
+        customInput: ''
+      };
+    },
+
+    computed: {
+      currentColor() {
+        const parent = this.$parent;
+        return !parent.value && !parent.showPanelColor ? '' : parent.color.value;
+      }
+    },
+
+    methods: {
+      confirmValue() {
+        this.$emit('pick');
+      },
+
+      handleConfirm() {
+        this.color.fromString(this.customInput);
+      }
+    },
+
+    mounted() {
+      this.$parent.popperElm = this.popperElm = this.$el;
+      this.referenceElm = this.$parent.$el;
+    },
+
+    watch: {
+      showPopper(val) {
+        if (val === true) {
+          this.$nextTick(() => {
+            const { sl, hue, alpha } = this.$refs;
+            sl && sl.update();
+            hue && hue.update();
+            alpha && alpha.update();
+          });
+        }
+      },
+
+      currentColor: {
+        immediate: true,
+        handler(val) {
+          this.customInput = val;
+        }
+      }
+    }
+  };
+</script>

packages/color-picker/src/components/predefine.vue

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+<template>
+  <div class="el-color-predefine">
+    <div class="el-color-predefine__colors">
+      <div class="el-color-predefine__color-selector"
+           :class="{selected: item.selected, 'is-alpha': item._alpha < 100}"
+           v-for="(item, index) in rgbaColors"
+           :key="colors[index]"
+           @click="handleSelect(index)">
+        <div :style="{'background-color': item.value}">
+        </div>
+      </div>
+    </div>
+  </div>
+</template>
+
+<script>
+  import Color from '../color';
+
+  export default {
+    props: {
+      colors: { type: Array, required: true },
+      color: { required: true }
+    },
+    data() {
+      return {
+        rgbaColors: this.parseColors(this.colors, this.color)
+      };
+    },
+    methods: {
+      handleSelect(index) {
+        this.color.fromString(this.colors[index]);
+      },
+      parseColors(colors, color) {
+        return colors.map(value => {
+          const c = new Color();
+          c.enableAlpha = true;
+          c.format = 'rgba';
+          c.fromString(value);
+          c.selected = c.value === color.value;
+          return c;
+        });
+      }
+    },
+    watch: {
+      '$parent.currentColor'(val) {
+        const color = new Color();
+        color.fromString(val);
+
+        this.rgbaColors.forEach(item => {
+          item.selected = color.compare(item);
+        });
+      },
+      colors(newVal) {
+        this.rgbaColors = this.parseColors(newVal, this.color);
+      },
+      color(newVal) {
+        this.rgbaColors = this.parseColors(this.colors, newVal);
+      }
+    }
+  };
+</script>

packages/color-picker/src/components/sv-panel.vue

@@ -0,0 +1,100 @@
+<template>
+  <div class="el-color-svpanel"
+      :style="{
+        backgroundColor: background
+      }">
+    <div class="el-color-svpanel__white"></div>
+    <div class="el-color-svpanel__black"></div>
+    <div class="el-color-svpanel__cursor"
+      :style="{
+        top: cursorTop + 'px',
+        left: cursorLeft + 'px'
+      }">
+      <div></div>
+    </div>
+  </div>
+</template>
+
+<script>
+  import draggable from '../draggable';
+
+  export default {
+    name: 'el-sl-panel',
+
+    props: {
+      color: {
+        required: true
+      }
+    },
+
+    computed: {
+      colorValue() {
+        const hue = this.color.get('hue');
+        const value = this.color.get('value');
+        return { hue, value };
+      }
+    },
+
+    watch: {
+      colorValue() {
+        this.update();
+      }
+    },
+
+    methods: {
+      update() {
+        const saturation = this.color.get('saturation');
+        const value = this.color.get('value');
+
+        const el = this.$el;
+        let { clientWidth: width, clientHeight: height } = el;
+
+        this.cursorLeft = saturation * width / 100;
+        this.cursorTop = (100 - value) * height / 100;
+
+        this.background = 'hsl(' + this.color.get('hue') + ', 100%, 50%)';
+      },
+
+      handleDrag(event) {
+        const el = this.$el;
+        const rect = el.getBoundingClientRect();
+
+        let left = event.clientX - rect.left;
+        let top = event.clientY - rect.top;
+        left = Math.max(0, left);
+        left = Math.min(left, rect.width);
+
+        top = Math.max(0, top);
+        top = Math.min(top, rect.height);
+
+        this.cursorLeft = left;
+        this.cursorTop = top;
+        this.color.set({
+          saturation: left / rect.width * 100,
+          value: 100 - top / rect.height * 100
+        });
+      }
+    },
+
+    mounted() {
+      draggable(this.$el, {
+        drag: (event) => {
+          this.handleDrag(event);
+        },
+        end: (event) => {
+          this.handleDrag(event);
+        }
+      });
+
+      this.update();
+    },
+
+    data() {
+      return {
+        cursorTop: 0,
+        cursorLeft: 0,
+        background: 'hsl(0, 100%, 50%)'
+      };
+    }
+  };
+</script>

packages/color-picker/src/draggable.js

@@ -0,0 +1,36 @@
+import Vue from 'vue';
+let isDragging = false;
+
+export default function(element, options) {
+  if (Vue.prototype.$isServer) return;
+  const moveFn = function(event) {
+    if (options.drag) {
+      options.drag(event);
+    }
+  };
+  const upFn = function(event) {
+    document.removeEventListener('mousemove', moveFn);
+    document.removeEventListener('mouseup', upFn);
+    document.onselectstart = null;
+    document.ondragstart = null;
+
+    isDragging = false;
+
+    if (options.end) {
+      options.end(event);
+    }
+  };
+  element.addEventListener('mousedown', function(event) {
+    if (isDragging) return;
+    document.onselectstart = function() { return false; };
+    document.ondragstart = function() { return false; };
+
+    document.addEventListener('mousemove', moveFn);
+    document.addEventListener('mouseup', upFn);
+    isDragging = true;
+
+    if (options.start) {
+      options.start(event);
+    }
+  });
+}

packages/color-picker/src/main.vue

@@ -0,0 +1,188 @@
+<template>
+  <div
+    :class="[
+      'el-color-picker',
+      colorDisabled ? 'is-disabled' : '',
+      colorSize ? `el-color-picker--${ colorSize }` : ''
+    ]"
+    v-clickoutside="hide">
+    <div class="el-color-picker__mask" v-if="colorDisabled"></div>
+    <div class="el-color-picker__trigger" @click="handleTrigger">
+      <span class="el-color-picker__color" :class="{ 'is-alpha': showAlpha }">
+        <span class="el-color-picker__color-inner"
+          :style="{
+            backgroundColor: displayedColor
+          }"></span>
+        <span class="el-color-picker__empty el-icon-close" v-if="!value && !showPanelColor"></span>
+      </span>
+      <span class="el-color-picker__icon el-icon-arrow-down" v-show="value || showPanelColor"></span>
+    </div>
+    <picker-dropdown
+       ref="dropdown"
+       :class="['el-color-picker__panel', popperClass || '']"
+       v-model="showPicker"
+       @pick="confirmValue"
+       @clear="clearValue"
+       :color="color"
+       :show-alpha="showAlpha"
+       :predefine="predefine">
+    </picker-dropdown>
+  </div>
+</template>
+
+<script>
+  import Color from './color';
+  import PickerDropdown from './components/picker-dropdown.vue';
+  import Clickoutside from 'element-ui/src/utils/clickoutside';
+  import Emitter from 'element-ui/src/mixins/emitter';
+
+  export default {
+    name: 'ElColorPicker',
+
+    mixins: [Emitter],
+
+    props: {
+      value: String,
+      showAlpha: Boolean,
+      colorFormat: String,
+      disabled: Boolean,
+      size: String,
+      popperClass: String,
+      predefine: Array
+    },
+
+    inject: {
+      elForm: {
+        default: ''
+      },
+      elFormItem: {
+        default: ''
+      }
+    },
+
+    directives: { Clickoutside },
+
+    computed: {
+      displayedColor() {
+        if (!this.value && !this.showPanelColor) {
+          return 'transparent';
+        }
+
+        return this.displayedRgb(this.color, this.showAlpha);
+      },
+
+      _elFormItemSize() {
+        return (this.elFormItem || {}).elFormItemSize;
+      },
+
+      colorSize() {
+        return this.size || this._elFormItemSize || (this.$ELEMENT || {}).size;
+      },
+
+      colorDisabled() {
+        return this.disabled || (this.elForm || {}).disabled;
+      }
+    },
+
+    watch: {
+      value(val) {
+        if (!val) {
+          this.showPanelColor = false;
+        } else if (val && val !== this.color.value) {
+          this.color.fromString(val);
+        }
+      },
+      color: {
+        deep: true,
+        handler() {
+          this.showPanelColor = true;
+        }
+      },
+      displayedColor(val) {
+        if (!this.showPicker) return;
+        const currentValueColor = new Color({
+          enableAlpha: this.showAlpha,
+          format: this.colorFormat
+        });
+        currentValueColor.fromString(this.value);
+
+        const currentValueColorRgb = this.displayedRgb(currentValueColor, this.showAlpha);
+        if (val !== currentValueColorRgb) {
+          this.$emit('active-change', val);
+        }
+      }
+    },
+
+    methods: {
+      handleTrigger() {
+        if (this.colorDisabled) return;
+        this.showPicker = !this.showPicker;
+      },
+      confirmValue() {
+        const value = this.color.value;
+        this.$emit('input', value);
+        this.$emit('change', value);
+        this.dispatch('ElFormItem', 'el.form.change', value);
+        this.showPicker = false;
+      },
+      clearValue() {
+        this.$emit('input', null);
+        this.$emit('change', null);
+        if (this.value !== null) {
+          this.dispatch('ElFormItem', 'el.form.change', null);
+        }
+        this.showPanelColor = false;
+        this.showPicker = false;
+        this.resetColor();
+      },
+      hide() {
+        this.showPicker = false;
+        this.resetColor();
+      },
+      resetColor() {
+        this.$nextTick(_ => {
+          if (this.value) {
+            this.color.fromString(this.value);
+          } else {
+            this.showPanelColor = false;
+          }
+        });
+      },
+      displayedRgb(color, showAlpha) {
+        if (!(color instanceof Color)) {
+          throw Error('color should be instance of Color Class');
+        }
+
+        const { r, g, b } = color.toRgb();
+        return showAlpha
+          ? `rgba(${ r }, ${ g }, ${ b }, ${ color.get('alpha') / 100 })`
+          : `rgb(${ r }, ${ g }, ${ b })`;
+      }
+    },
+
+    mounted() {
+      const value = this.value;
+      if (value) {
+        this.color.fromString(value);
+      }
+      this.popperElm = this.$refs.dropdown.$el;
+    },
+
+    data() {
+      const color = new Color({
+        enableAlpha: this.showAlpha,
+        format: this.colorFormat
+      });
+
+      return {
+        color,
+        showPicker: false,
+        showPanelColor: false
+      };
+    },
+
+    components: {
+      PickerDropdown
+    }
+  };
+</script>