ant-design-vue/components/vc-time-picker/Select.jsx

147 lines
3.3 KiB
Vue

import PropTypes from '../_util/vue-types';
import BaseMixin from '../_util/BaseMixin';
import classnames from 'classnames';
import raf from 'raf';
function noop() {}
const scrollTo = (element, to, duration) => {
// jump to target if duration zero
if (duration <= 0) {
raf(() => {
element.scrollTop = to;
});
return;
}
const difference = to - element.scrollTop;
const perTick = (difference / duration) * 10;
raf(() => {
element.scrollTop += perTick;
if (element.scrollTop === to) return;
scrollTo(element, to, duration - 10);
});
};
const Select = {
name: 'Select',
mixins: [BaseMixin],
inheritAttrs: false,
props: {
prefixCls: PropTypes.string,
options: PropTypes.array,
selectedIndex: PropTypes.number,
type: PropTypes.string,
// onSelect: PropTypes.func,
// onMouseEnter: PropTypes.func,
},
data() {
return {
active: false,
};
},
mounted() {
this.$nextTick(() => {
// jump to selected option
this.scrollToSelected(0);
});
},
watch: {
selectedIndex() {
this.$nextTick(() => {
// smooth scroll to selected option
this.scrollToSelected(120);
});
},
},
methods: {
onSelect(value) {
const { type } = this;
this.__emit('select', type, value);
},
onEsc(e) {
this.__emit('esc', e);
},
getOptions() {
const { options, selectedIndex, prefixCls } = this;
return options.map((item, index) => {
const cls = classnames({
[`${prefixCls}-select-option-selected`]: selectedIndex === index,
[`${prefixCls}-select-option-disabled`]: item.disabled,
});
const onClick = item.disabled
? noop
: () => {
this.onSelect(item.value);
};
const onKeyDown = e => {
if (e.keyCode === 13) onClick();
else if (e.keyCode === 27) this.onEsc();
};
return (
<li
role="button"
onClick={onClick}
class={cls}
key={index}
disabled={item.disabled}
tabindex="0"
onKeydown={onKeyDown}
>
{item.value}
</li>
);
});
},
handleMouseEnter(e) {
this.setState({ active: true });
this.__emit('mouseenter', e);
},
handleMouseLeave() {
this.setState({ active: false });
},
saveList(node) {
this.list = node;
},
scrollToSelected(duration) {
// move to selected item
const select = this.$el;
const list = this.$refs.list;
if (!list) {
return;
}
let index = this.selectedIndex;
if (index < 0) {
index = 0;
}
const topOption = list.children[index];
const to = topOption.offsetTop;
scrollTo(select, to, duration);
},
},
render() {
const { prefixCls, options, active } = this;
if (options.length === 0) {
return null;
}
const cls = {
[`${prefixCls}-select`]: 1,
[`${prefixCls}-select-active`]: active,
};
return (
<div class={cls} onMouseenter={this.handleMouseEnter} onMouseleave={this.handleMouseLeave}>
<ul ref={this.saveList}>{this.getOptions()}</ul>
</div>
);
},
};
export default Select;