other / mew-iview

  <template>

      <div :class="classes" @mousedown.prevent>

          <div :class="[prefixCls + '-sidebar']" v-if="shortcuts.length">

              <div
                  :class="[prefixCls + '-shortcut']"
                  v-for="shortcut in shortcuts"
                  @click="handleShortcutClick(shortcut)">{{ shortcut.text }}</div>
          </div>
          <div :class="[prefixCls + '-body']">
              <div :class="[datePrefixCls + '-header']" v-show="currentView !== 'time'">
                  <span
                      :class="iconBtnCls('prev', '-double')"

                      @click="changeYear(-1)"><Icon type="ios-arrow-left"></Icon></span>

                  <span
                      :class="iconBtnCls('prev')"

                      @click="changeMonth(-1)"

                      v-show="currentView === 'date'"><Icon type="ios-arrow-left"></Icon></span>

                  <span
                      :class="[datePrefixCls + '-header-label']"

                      @click="showYearPicker">{{ yearLabel }}</span>

                  <span
                      :class="[datePrefixCls + '-header-label']"
                      @click="showMonthPicker"

                      v-show="currentView === 'date'">{{ monthLabel }}</span>

                  <span
                      :class="iconBtnCls('next', '-double')"

                      @click="changeYear(+1)"><Icon type="ios-arrow-right"></Icon></span>

                  <span
                      :class="iconBtnCls('next')"

                      @click="changeMonth(+1)"

                      v-show="currentView === 'date'"><Icon type="ios-arrow-right"></Icon></span>

              </div>
              <div :class="[prefixCls + '-content']">
                  <date-table

                      v-show="currentView === 'date'"
                      :year="year"
                      :month="month"
                      :date="date"
                      :value="value"

                      :selection-mode="selectionMode"

                      :disabled-date="disabledDate"

                      @on-pick="handleDatePick"
                      @on-pick-click="handlePickClick"></date-table>

                  <year-table

                      ref="yearTable"

                      v-show="currentView === 'year'"
                      :year="year"
                      :date="date"

                      :selection-mode="selectionMode"

                      :disabled-date="disabledDate"

                      @on-pick="handleYearPick"
                      @on-pick-click="handlePickClick"></year-table>

                  <month-table

                      ref="monthTable"

                      v-show="currentView === 'month'"
                      :month="month"
                      :date="date"

                      :selection-mode="selectionMode"

                      :disabled-date="disabledDate"

                      @on-pick="handleMonthPick"
                      @on-pick-click="handlePickClick"></month-table>

                  <time-picker

                      ref="timePicker"

                      show-date

                      v-show="currentView === 'time'"

                      @on-pick="handleTimePick"
                      @on-pick-click="handlePickClick"></time-picker>

              </div>

              <Confirm
                  v-if="confirm"

                  :show-time="showTime"
                  :is-time="isTime"
                  @on-pick-toggle-time="handleToggleTime"

                  @on-pick-clear="handlePickClear"
                  @on-pick-success="handlePickSuccess"></Confirm>

          </div>
      </div>

  </template>
  <script>

      import Icon from '../../icon/icon.vue';

      import DateTable from '../base/date-table.vue';
      import YearTable from '../base/year-table.vue';
      import MonthTable from '../base/month-table.vue';

      import TimePicker from './time.vue';

      import Confirm from '../base/confirm.vue';

      import Mixin from './mixin';

      import Locale from '../../../mixins/locale';

      import { initTimeDate, siblingMonth } from '../util';

      const prefixCls = 'ivu-picker-panel';
      const datePrefixCls = 'ivu-date-picker';
  

      export default {

          name: 'DatePicker',

          mixins: [ Mixin, Locale ],

          components: { Icon, DateTable, YearTable, MonthTable, TimePicker, Confirm },

          data () {

              return {
                  prefixCls: prefixCls,
                  datePrefixCls: datePrefixCls,
                  shortcuts: [],

                  currentView: 'date',

                  date: initTimeDate(),

                  value: '',
                  showTime: false,
                  selectionMode: 'day',

                  disabledDate: '',
                  year: null,
                  month: null,

                  confirm: false,

                  isTime: false,
                  format: 'yyyy-MM-dd'

              };

          },
          computed: {

              classes () {
                  return [
                      `${prefixCls}-body-wrapper`,
                      {
                          [`${prefixCls}-with-sidebar`]: this.shortcuts.length
                      }

                  ];

              },

              yearLabel () {

                  const tYear = this.t('i.datepicker.year');

                  const year = this.year;
                  if (!year) return '';
                  if (this.currentView === 'year') {
                      const startYear = Math.floor(year / 10) * 10;

                      return `${startYear}${tYear} - ${startYear + 9}${tYear}`;

                  }

                  return `${year}${tYear}`;
              },
              monthLabel () {
                  const month = this.month + 1;
                  return this.t(`i.datepicker.month${month}`);

              }

          },
          watch: {
              value (newVal) {

                  if (!newVal) return;

                  newVal = new Date(newVal);
                  if (!isNaN(newVal)) {

                      this.date = newVal;

                      this.setMonthYear(newVal);

                  }

                  if (this.showTime) this.$refs.timePicker.value = newVal;
              },
              date (val) {
                  if (this.showTime) this.$refs.timePicker.date = val;
              },
              format (val) {
                  if (this.showTime) this.$refs.timePicker.format = val;

              },
              currentView (val) {
                  if (val === 'time') this.$refs.timePicker.updateScroll();

              }

          },

          methods: {

              resetDate () {
                  this.date = new Date(this.date);
              },

              setMonthYear(date){
                  this.month = date.getMonth();
                  this.year = date.getFullYear();
              },

              handleClear () {

                  this.date = new Date();
                  this.$emit('on-pick', '');

                  if (this.showTime) this.$refs.timePicker.handleClear();

              },

              resetView (reset = false) {
                  if (this.currentView !== 'time' || reset) {
                      if (this.selectionMode === 'month') {
                          this.currentView = 'month';
                      } else if (this.selectionMode === 'year') {
                          this.currentView = 'year';
                      } else {
                          this.currentView = 'date';
                      }

                  }

                  this.setMonthYear(this.date);

                  if (reset) this.isTime = false;

              },

              changeYear(dir){

                  if (this.currentView === 'year') {

                      this.$refs.yearTable[dir == 1 ? 'nextTenYear' : 'prevTenYear']();

                  } else {

                      this.year+= dir;
                      this.date = siblingMonth(this.date, dir * 12);

                  }

              },

              changeMonth(dir){
                  this.date = siblingMonth(this.date, dir);
                  this.setMonthYear(this.date);

              },
              showYearPicker () {

                  this.currentView = 'year';

              },
              showMonthPicker () {

                  this.currentView = 'month';
              },

              handleToggleTime () {
                  if (this.currentView === 'date') {
                      this.currentView = 'time';
                      this.isTime = true;
                  } else if (this.currentView === 'time') {
                      this.currentView = 'date';
                      this.isTime = false;
                  }
              },

              handleYearPick(year, close = true) {
                  this.year = year;
                  if (!close) return;

                  this.date.setFullYear(year);
                  if (this.selectionMode === 'year') {

                      this.$emit('on-pick', new Date(year, 0, 1));

                  } else {
                      this.currentView = 'month';
                  }
  
                  this.resetDate();
              },
              handleMonthPick (month) {
                  this.month = month;

                  this.date.setMonth(month);
                  if (this.selectionMode !== 'month') {

                      this.currentView = 'date';
                      this.resetDate();
                  } else {

                      this.year && this.date.setFullYear(this.year);
                      this.resetDate();
                      const value = new Date(this.date.getFullYear(), month, 1);
                      this.$emit('on-pick', value);
                  }
              },
              handleDatePick (value) {
                  if (this.selectionMode === 'day') {

                      this.$emit('on-pick', new Date(value.getTime()));

                      this.date = new Date(value);

                  }

              },
              handleTimePick (date) {
                  this.handleDatePick(date);

              }
          },

          mounted () {

              if (this.selectionMode === 'month') {
                  this.currentView = 'month';
              }
  
              if (this.date && !this.year) {

                  this.setMonthYear(this.date);

              }

              if (this.showTime) {

                  // todo 这里可能有问题，并不能进入到这里，但不影响正常使用

                  this.$refs.timePicker.date = this.date;
                  this.$refs.timePicker.value = this.value;
                  this.$refs.timePicker.format = this.format;
                  this.$refs.timePicker.showDate = true;
              }

          }

      };
  </script>