time-select.vue
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<template>
<transition name="el-zoom-in-top" @before-enter="handleMenuEnter" @after-leave="$emit('dodestroy')">
<div
ref="popper"
v-show="visible"
:style="{ width: width + 'px' }"
:class="popperClass"
class="el-picker-panel time-select el-popper">
<el-scrollbar noresize wrap-class="el-picker-panel__content">
<div class="time-select-item"
v-for="item in items"
:class="{ selected: value === item.value, disabled: item.disabled, default: item.value === defaultValue }"
:disabled="item.disabled"
:key="item.value"
@click="handleClick(item)">{{ item.value }}</div>
</el-scrollbar>
</div>
</transition>
</template>
<script type="text/babel">
import ElScrollbar from 'element-ui/packages/scrollbar';
import scrollIntoView from 'element-ui/src/utils/scroll-into-view';
const parseTime = function(time) {
const values = (time || '').split(':');
if (values.length >= 2) {
const hours = parseInt(values[0], 10);
const minutes = parseInt(values[1], 10);
return {
hours,
minutes
};
}
/* istanbul ignore next */
return null;
};
const compareTime = function(time1, time2) {
const value1 = parseTime(time1);
const value2 = parseTime(time2);
const minutes1 = value1.minutes + value1.hours * 60;
const minutes2 = value2.minutes + value2.hours * 60;
if (minutes1 === minutes2) {
return 0;
}
return minutes1 > minutes2 ? 1 : -1;
};
const formatTime = function(time) {
return (time.hours < 10 ? '0' + time.hours : time.hours) + ':' + (time.minutes < 10 ? '0' + time.minutes : time.minutes);
};
const nextTime = function(time, step) {
const timeValue = parseTime(time);
const stepValue = parseTime(step);
const next = {
hours: timeValue.hours,
minutes: timeValue.minutes
};
next.minutes += stepValue.minutes;
next.hours += stepValue.hours;
next.hours += Math.floor(next.minutes / 60);
next.minutes = next.minutes % 60;
return formatTime(next);
};
export default {
components: { ElScrollbar },
watch: {
value(val) {
if (!val) return;
this.$nextTick(() => this.scrollToOption());
}
},
methods: {
handleClick(item) {
if (!item.disabled) {
this.$emit('pick', item.value);
}
},
handleClear() {
this.$emit('pick', null);
},
scrollToOption(selector = '.selected') {
const menu = this.$refs.popper.querySelector('.el-picker-panel__content');
scrollIntoView(menu, menu.querySelector(selector));
},
handleMenuEnter() {
const selected = this.items.map(item => item.value).indexOf(this.value) !== -1;
const hasDefault = this.items.map(item => item.value).indexOf(this.defaultValue) !== -1;
const option = (selected && '.selected') || (hasDefault && '.default') || '.time-select-item:not(.disabled)';
this.$nextTick(() => this.scrollToOption(option));
},
scrollDown(step) {
const items = this.items;
const length = items.length;
let total = items.length;
let index = items.map(item => item.value).indexOf(this.value);
while (total--) {
index = (index + step + length) % length;
if (!items[index].disabled) {
this.$emit('pick', items[index].value, true);
return;
}
}
},
isValidValue(date) {
return this.items.filter(item => !item.disabled).map(item => item.value).indexOf(date) !== -1;
},
handleKeydown(event) {
const keyCode = event.keyCode;
if (keyCode === 38 || keyCode === 40) {
const mapping = { 40: 1, 38: -1 };
const offset = mapping[keyCode.toString()];
this.scrollDown(offset);
event.stopPropagation();
return;
}
}
},
data() {
return {
popperClass: '',
start: '09:00',
end: '18:00',
step: '00:30',
value: '',
defaultValue: '',
visible: false,
minTime: '',
maxTime: '',
width: 0
};
},
computed: {
items() {
const start = this.start;
const end = this.end;
const step = this.step;
const result = [];
if (start && end && step) {
let current = start;
while (compareTime(current, end) <= 0) {
result.push({
value: current,
disabled: compareTime(current, this.minTime || '-1:-1') <= 0 ||
compareTime(current, this.maxTime || '100:100') >= 0
});
current = nextTime(current, step);
}
}
return result;
}
}
};
</script>