Merge pull request #3487 from xiaofengsha/pr007

rate组件添加allowClear属性，通过点击可以把当前评分清零

examples/routers/rate.vue

@@ -2,6 +2,8 @@
     <div>
         <Rate v-model="value"></Rate>
         <Rate allow-half v-model="valueHalf"></Rate>
+        <Rate clearable v-model="valueClear"></Rate>
+        <Rate clearable allow-half  v-model="valueClearHalf"></Rate>
         <!--<Rate show-text v-model="valueText"></Rate>-->
         <!--<Rate show-text allow-half v-model="valueCustomText">-->
             <!--<span style="color: #f5a623">{{ valueCustomText }}</span>-->
@@ -17,7 +19,9 @@
                 valueHalf: 2.5,
                 valueText: 3,
                 valueCustomText: 4.0,
-                valueDisabled: 2.4
+                valueDisabled: 2.4,
+                valueClear: 1,
+                valueClearHalf: 1.5,
             }
         }
     }

src/components/rate/rate.vue

@@ -45,6 +45,10 @@
             },
             name: {
                 type: String
+            },
+            clearable: {
+                type: Boolean,
+                default: false
             }
         },
         data () {
@@ -125,6 +129,11 @@
                 if (this.disabled) return;
                 //value++;
                 if (this.isHalf) value -= 0.5;
+
+                if(this.clearable && Math.abs(value - this.currentValue) < 0.01) {
+                    value = 0;
+                }
+
                 this.currentValue = value;
                 this.$emit('input', value);
                 this.$emit('on-change', value);