<template>
  <view class="page-body">
    <page-head title="movable-view,可拖动视图"></page-head>
    <view class="uni-padding-wrap uni-common-mt">
      <view class="uni-title uni-common-mt">
        示例 1
        <text>\nmovable-view 区域小于 movable-area</text>
      </view>
      <movable-area>
        <movable-view :x="x" :y="y" direction="all" @change="onChange"
          >text</movable-view
        >
      </movable-area>
      <view @tap="tap" class="uni-link uni-center uni-common-mt">
        点击这里移动至 (30px, 30px)
      </view>
      <view class="uni-title uni-common-mt">
        示例 2
        <text>\nmovable-view区域大于movable-area</text>
      </view>
      <movable-area>
        <movable-view class="max" direction="all">text</movable-view>
      </movable-area>
      <view class="uni-title uni-common-mt">
        示例 3
        <text>\n只可以横向移动</text>
      </view>
      <movable-area>
        <movable-view direction="horizontal">text</movable-view>
      </movable-area>
      <view class="uni-title uni-common-mt">
        示例 4
        <text>\n只可以纵向移动</text>
      </view>
      <movable-area>
        <movable-view direction="vertical">text</movable-view>
      </movable-area>
      <view class="uni-title uni-common-mt">
        示例 5
        <text>\n可超出边界</text>
      </view>
      <movable-area>
        <movable-view direction="all" out-of-bounds>text</movable-view>
      </movable-area>
      <view class="uni-title uni-common-mt">
        示例 6
        <text>\n带有惯性</text>
      </view>
      <movable-area>
        <movable-view direction="all" inertia>text</movable-view>
      </movable-area>
      <view class="uni-title uni-common-mt">
        示例 7
        <text>\n可放缩</text>
      </view>
      <movable-area scale-area>
        <movable-view
          direction="all"
          @scale="onScale"
          scale
          scale-min="0.5"
          scale-max="4"
          :scale-value="scale"
          >text</movable-view
        >
      </movable-area>
      <view
        @tap="tap2"
        class="uni-link uni-center uni-common-mt"
        style="padding-bottom: 80rpx"
      >
        点击这里放大3倍
      </view>
    </view>
  </view>
</template>

<script>
export default {
  data() {
    return {
      x: 0,
      y: 0,
      scale: 2,
      old: {
        x: 0,
        y: 0,
        scale: 2,
      },
    };
  },
  methods: {
    tap: function (e) {
      // 解决view层不同步的问题
      this.x = this.old.x;
      this.y = this.old.y;
      this.$nextTick(function () {
        this.x = 30;
        this.y = 30;
      });
    },
    tap2() {
      // 解决view层不同步的问题
      this.scale = this.old.scale;
      this.scale = this.old.scale;
      this.$nextTick(function () {
        this.scale = 3;
      });
    },
    onChange: function (e) {
      this.old.x = e.detail.x;
      this.old.y = e.detail.y;
    },
    onScale: function (e) {
      this.old.scale = e.detail.scale;
    },
  },
};
</script>

<style>
movable-view {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 150rpx;
  width: 150rpx;
  background-color: #007aff;
  color: #fff;
}

movable-area {
  height: 300rpx;
  width: 100%;
  background-color: #d8d8d8;
  overflow: hidden;
}

.max {
  width: 500rpx;
  height: 500rpx;
}
</style>
