如何仅在首先单击元素时触发鼠标移动?
我正在尝试将其用于音频播放器时间线。
.player__time--bar(@mousedown="setNewCurrentPosition($event)")
.slider(role="slider" aria-valuemin="0" :aria-valuenow="currentPosition" :aria-valuemax="trackTotalDuration" aria-orientation="horizontal")
.player__time--bar-current-position(:style="{width: (100 / (trackTotalDuration / currentPosition)) + '%'}")
方法:
setNewCurrentPosition(e) {
let tag = e.target
// if the click is not on 'slider', grab div with class 'slider'
if (e.target.className === 'player__time--bar') tag = e.target.firstElementChild
else if (e.target.className === 'player__time--bar-current-position') tag = e.target.parentElement
const pos = tag.getBoundingClientRect()
const seekPos = (e.clientX - pos.left) / pos.width
this.currentPosition = parseInt(this.trackTotalDuration * seekPos)
// updates the time in the html
this.$refs.player.currentTime = this.currentPosition
},
你会想要有一个mousedown
元素上的侦听器,设置一个变量来指示拖动开始。在窗口上放置一个监听器来捕获mouseup
任何地方并取消设置变量。
你可以把mousemove
如果您只对元素内部发生的拖动感兴趣,则在元素上。否则你可以把mousemove
监听器开启window
所以你到处都能发现它。
new Vue({
el: '#app',
data: {
dragging: false,
x: 'no',
y: 'no'
},
methods: {
startDrag() {
this.dragging = true;
this.x = this.y = 0;
},
stopDrag() {
this.dragging = false;
this.x = this.y = 'no';
},
doDrag(event) {
if (this.dragging) {
this.x = event.clientX;
this.y = event.clientY;
}
}
},
mounted() {
window.addEventListener('mouseup', this.stopDrag);
}
});
.dragstartzone {
background-color: red;
}
<script src="//cdnjs.cloudflare.com/ajax/libs/vue/2.4.2/vue.min.js"></script>
<div id="app">
<div class="dragstartzone" @mousedown="startDrag" @mousemove="doDrag">Start dragging here</div>
<div>X: {{x}}, Y: {{y}}</div>
</div>
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