quantity component

2017-03-10 15:09:10 +08:00
parent 4935ca66ac
commit f6b3eb8365
12 changed files with 310 additions and 2 deletions
@@ -0,0 +1,104 @@
+<template>
+  <div class="zan-quantity">
+    <button
+      @click="handleChange('minus')"
+      class="zan-quantity__stepper zan-quantity__minus"
+      :class="{
+        'zan-quantity__minus--disabled': isMinusDisabled
+      }">
+    </button>
+    <input type="text" class="zan-quantity__input" :value="currentValue" @input="handleInputChange" :disabled="disabled">
+    <button
+      @click="handleChange('plus')"
+      class="zan-quantity__stepper zan-quantity__plus"
+      :class="{
+        'zan-quantity__plus--disabled': isPlusDisabled
+      }">
+    </button>
+  </div>
+</template>
+
+<script>
+export default {
+  name: 'zan-quantity',
+
+  props: {
+    min: {
+      type: [String, Number],
+      default: 1
+    },
+    max: {
+      type: [String, Number],
+      default: Infinity
+    },
+    value: {},
+    step: {
+      type: [String, Number],
+      default: 1
+    },
+    disabled: Boolean,
+    defaultValue: {
+      type: [String, Number],
+      default: 1
+    }
+  },
+
+  data() {
+    return {
+      currentValue: this.value ? +this.value : +this.defaultValue
+    };
+  },
+
+  computed: {
+    isMinusDisabled() {
+      const min = +this.min;
+      const step = +this.step;
+      const currentValue = +this.currentValue;
+      return min === currentValue || (currentValue - step) < min || this.disabled;
+    },
+    isPlusDisabled() {
+      const max = +this.max;
+      const step = +this.step;
+      const currentValue = +this.currentValue;
+      return max === currentValue || (currentValue + step) > max || this.disabled;
+    }
+  },
+
+  watch: {
+    currentValue(val) {
+      this.$emit('input', +val);
+    },
+    value(val) {
+      if (val) {
+        this.currentValue = +val;
+      }
+    }
+  },
+
+  methods: {
+    handleInputChange(event) {
+      let val = +event.target.value;
+      const max = +this.max;
+      const min = +this.min;
+
+      if (val > max) {
+        val = max;
+      } else if (val < min) {
+        val = min;
+      }
+
+      this.currentValue = val;
+    },
+    handleChange(type) {
+      if ((this.isMinusDisabled && type === 'minus') || (this.isPlusDisabled && type === 'plus')) {
+        return;
+      }
+
+      const step = +this.step;
+      const currentValue = +this.currentValue;
+      this.currentValue = type === 'minus' ? (currentValue - step) : (currentValue + step);
+      this.$emit('change', this.currentValue);
+    }
+  }
+};
+</script>