carousel.vue
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<template>
<div :class="classes">
<button :class="arrowClasses" class="left" @click="add(-1)">
<Icon type="chevron-left"></Icon>
</button>
<div :class="[prefixCls + '-list']">
<div :class="[prefixCls + '-track']" :style="trackStyles" v-el:slides>
<slot></slot>
</div>
</div>
<button :class="arrowClasses" class="right" @click="add(1)">
<Icon type="chevron-right"></Icon>
</button>
<ul :class="dotsClasses">
<template v-for="n in slides.length">
<li :class="{ [`${prefixCls}-active`]: n === currentIndex }"
@click="dotsEvent('click', n)"
@mouseover="dotsEvent('hover', n)">
<button></button>
</li>
</template>
</ul>
</div>
</template>
<script>
import Icon from '../icon/icon.vue';
import { oneOf, getStyle, deepCopy, getScrollBarSize } from '../../utils/assist';
const prefixCls = 'ivu-carousel';
export default {
name: 'Carousel',
props: {
arrow: {
type: String,
default: 'hover'
},
autoplay: {
type: Boolean,
default: true
},
autoplaySpeed: {
type: Number,
default: 2000
},
easing: {
type: String,
default: 'ease'
},
dots: {
type: String,
default: 'inside'
},
trigger: {
type: String,
default: 'click'
},
currentIndex: {
type: Number,
default: 0
},
height: {
type: [String, Number],
default: 'auto'
}
},
data () {
return {
prefixCls: prefixCls,
listWidth: 0,
trackWidth: 0,
trackOffset: 0,
slides: [],
slideInstances: [],
timer: null,
ready: false
}
},
computed: {
classes () {
return [
`${prefixCls}`
];
},
trackStyles () {
return {
width: `${this.trackWidth}px`,
transform: `translate3d(-${this.trackOffset}px, 0px, 0px)`,
transition: `transform 500ms ${this.easing}`
};
},
arrowClasses () {
return [
`${prefixCls}-arrow`,
`${prefixCls}-arrow-${this.arrow}`
]
},
dotsClasses () {
return [
`${prefixCls}-dots`,
`${prefixCls}-dots-${this.dots}`
]
}
},
methods: {
// find option component
findChild (cb) {
const find = function (child) {
const name = child.$options.componentName;
if (name) {
cb(child);
} else if (child.$children.length) {
child.$children.forEach((innerChild) => {
find(innerChild, cb);
});
}
};
if (this.slideInstances.length || !this.$children) {
this.slideInstances.forEach((child) => {
find(child);
});
} else {
this.$children.forEach((child) => {
find(child);
});
}
},
updateSlides (init, slot = false) {
let slides = [];
let index = 1;
this.findChild((child) => {
slides.push({
$el: child.$el
});
child.index = index++;
if (init) {
this.slideInstances.push(child);
}
});
this.slides = slides;
this.updatePos();
},
updatePos () {
this.findChild((child) => {
child.width = this.listWidth;
child.height = typeof this.height === 'number' ? `${this.height}px` : this.height;
});
this.trackWidth = (this.slides.length || 0) * this.listWidth;
},
// use when slot changed
slotChange () {
this.$nextTick(() => {
this.slides = [];
this.slideInstances = [];
this.updateSlides(true, true);
this.updatePos();
});
},
handleResize () {
this.listWidth = parseInt(getStyle(this.$el, 'width'));
this.updatePos();
},
add (offset) {
let index = this.currentIndex;
index += offset;
while (index < 0) index += this.slides.length;
index = index % this.slides.length;
this.$emit('on-change', this.currentIndex, index);
this.currentIndex = index;
},
dotsEvent (event, n) {
if (event === this.trigger && this.currentIndex !== n) {
this.$emit('on-change', this.currentIndex, n);
this.currentIndex = n;
}
},
setAutoplay () {
window.clearInterval(this.timer);
if (this.autoplay) {
this.timer = window.setInterval(() => {
this.add(1);
}, this.autoplaySpeed);
}
},
updateOffset () {
this.$nextTick(() => {
this.handleResize();
this.trackOffset = this.currentIndex * this.listWidth;
});
}
},
compiled () {
this.updateSlides(true);
},
watch: {
autoplay () {
this.setAutoplay();
},
autoplaySpeed () {
this.setAutoplay();
},
currentIndex (val, oldVal) {
this.updateOffset();
},
height () {
this.updatePos();
}
},
ready () {
this.handleResize();
this.setAutoplay();
window.addEventListener('resize', this.handleResize, false);
},
beforeDestroy () {
window.removeEventListener('resize', this.handleResize, false);
}
};
</script>