[Improvement] Reorganize demos (#1052)

packages/circle/demo/index.vue

@@ -0,0 +1,78 @@
+<template>
+  <demo-section>
+    <demo-block :title="$t('basicUsage')">
+      <van-circle
+        v-model="currentRate1"
+        :rate="rate"
+        :speed="100"
+        size="120px"
+        :text="currentRate1.toFixed(0) + '%'"
+      />
+      <van-circle
+        v-model="currentRate2"
+        color="#13ce66"
+        fill="#fff"
+        :rate="rate"
+        size="120px"
+        layer-color="#eee"
+        :speed="100"
+        :stroke-width="60"
+        :clockwise="false"
+        :text="currentRate2.toFixed(0) + '%'"
+      />
+      <div>
+        <van-button :text="$t('add')" type="primary" size="small" @click="add" />
+        <van-button :text="$t('decrease')" type="danger" size="small" @click="reduce" />
+      </div>
+    </demo-block>
+  </demo-section>
+</template>
+
+<script>
+const format = rate => Math.min(Math.max(rate, 0), 100);
+
+export default {
+  i18n: {
+    'zh-CN': {
+      title2: '样式定制'
+    },
+    'en-US': {
+      title2: 'Custom Style'
+    }
+  },
+
+  data() {
+    return {
+      rate: 30,
+      currentRate1: 0,
+      currentRate2: 0
+    };
+  },
+
+  methods: {
+    add() {
+      this.rate = format(this.rate + 20);
+    },
+
+    reduce() {
+      this.rate = format(this.rate - 20);
+    }
+  }
+};
+</script>
+
+<style lang="postcss">
+.demo-circle {
+  .van-circle {
+    margin-left: 15px;
+  }
+
+  .van-button {
+    margin: 15px 0 0 10px;
+
+    &:first-of-type {
+      margin-left: 15px;
+    }
+  }
+}
+</style>