<template>
     <!--左下角的放大缩小-->
  <div class="action-bar__wrapper">
    <button v-tooltip.right="'zoom in'" class="action-btn" @click="zoomIn" :disabled="!canZoomIn">
      <svgicon icon="system/editor/zoom_in" width="24" height="24"
        :color="canZoomIn ? '#fff' : 'rgba(255,255,255,.5)'">
      </svgicon>
    </button>

    <div class="zoom-value">{{Math.round(zoom * 100) + '%'}}</div>

    <button v-tooltip.right="'zoom out'" class="action-btn" @click="zoomOut" :disabled="!canZoomOut">
      <svgicon icon="system/editor/zoom_out" width="24" height="24"
        :color="canZoomOut ? '#fff' : 'rgba(255,255,255,.5)'">
      </svgicon>
    </button>
  </div>
</template>
<script>
    import '@/assets/icons/system/editor/zoom_in'
    import '@/assets/icons/system/editor/zoom_out'
    const MAX_ZOOM = 2.5;
    const MIN_ZOOM = 0.5;
    export default {
        name:'zoom-menu',
        props:['zoom'],
        computed:{
            canZoomIn (){return this.zoom < MAX_ZOOM},
            canZoomOut (){return this.zoom > MAX_ZOOM}
        },
        methods:{
            zoomIn(){this.$emit('zoomChange', Math.round((this.zoom + 0.1) * 10) /10)},
            zoomOut(){this.$emit('zoomChange',Math.round((this.zoom - 0.1) * 10) /10)}
        }
    }
</script>
<style scpoed>
.action-bar__wrapper{
    width:48px;
    z-index:1000;
    display:block;
    align-items:center;
    box-sizing:border-box;
    border-radius:50px;
    opcity:0.25;
    transition:opcity 0.25s cubic-bezier(0.4,0,0.2,1);
}
.action-bar__wrapper:hover{
    opcity:1;
}
.action-btn{
    height:36px;
    width:36px;
    min-width:28px;
    min-height:28px;
    padding:6px 0;
    border-radius:100%;
    background-color:transparent;
    border:0px none;
    user-select:none;
    outline:none;
}
.action-btn:hover{
    background-color:rgba(238,238,238,0.038);
}
.action-btn:active{
    background-color:rgba(238,238,238,0.038);
}
.action-btn *{
    vertical-align:middle;
}
.zoom-value{
    text-align:center;
    color:#fff;
    font-size:small;
}
</style>