DatePicker组件增加一个defaultDate属性，指定默认的选中时间 (ant-design#593)

* 不满一行时，填充的item样式问题

* update test snapshots

* 开放一个defaultDate属性

* 更新DatePicker文档和PropsType

* update demo

components/date-picker/PropsType.tsx

@@ -2,6 +2,7 @@ import React from 'react';
 import AntDatePickerProps from './datepicker/DatePickerProps';
 export interface DatePickerPropsType extends AntDatePickerProps {
   value?: Date;
+  defaultDate?: Date;
   mode?: 'datetime' | 'date' | 'year' | 'month' | 'time';
   minDate?: Date;
   maxDate?: Date;

components/date-picker/datepicker/DatePicker.tsx

@@ -154,20 +154,20 @@ class DatePicker extends React.Component<DatePickerProps, any> {
 
   getDefaultMinDate() {
     if (!this.defaultMinDate) {
-      this.defaultMinDate = new Date(2000, 1, 1, 0, 0, 0);
+      this.defaultMinDate = new Date(2000, 0, 1, 0, 0, 0);
     }
     return this.defaultMinDate;
   }
 
   getDefaultMaxDate() {
     if (!this.defaultMaxDate) {
-      this.defaultMaxDate = new Date(2030, 1, 1, 23, 59, 59);
+      this.defaultMaxDate = new Date(2030, 0, 1, 23, 59, 59);
     }
     return this.defaultMaxDate;
   }
 
   getDate() {
-    return this.clipDate(this.state.date || this.getDefaultMinDate());
+    return this.clipDate(this.state.date || this.props.defaultDate || this.getDefaultMinDate());
   }
 
   // used by rmc-picker/lib/PopupMixin.js

components/date-picker/demo/basic.md

@@ -30,6 +30,7 @@ export default class PopupExample extends React.Component {
             <DatePicker
               value={this.state.value}
               mode="date"
+              defaultDate={new Date()}
               minDate={new Date(2015, 7, 6)}
               maxDate={new Date(2026, 11, 3)}
               onChange={this.onChange}

components/date-picker/demo/basic.tsx

@@ -25,6 +25,7 @@ export default class PopupExample extends React.Component<any, any> {
           <DatePicker
             value={this.state.value}
             mode="date"
+            defaultDate={new Date()}
             minDate={new Date(2015, 7, 6)}
             maxDate={new Date(2026, 11, 3)}
             onChange={this.onChange}

components/date-picker/index.en-US.md

@@ -16,6 +16,7 @@ Properties | Descrition | Type | Default
 -----------|------------|------|--------
 | mode  | mode value, can be a `date` or `time` or `datetime` or `year` or `month` | String | `date` |
 | value | the currently selected value | Date | - |
+| defaultDate | the default selected value | Date | - |
 | minDate   | minimum date | Date  |  2000-1-1  |
 | maxDate   | maximum date | Date  |  2030-1-1  |
 | minuteStep |   The amount of time, in minutes, between each minute item.    | Number | 1 |

components/date-picker/index.tsx

@@ -24,7 +24,7 @@ export default class DatePicker extends React.Component<DatePickerProps> {
     antLocale: PropTypes.object,
   };
   render() {
-    const { children, value, itemStyle, ...restProps } = this.props;
+    const { children, value, defaultDate, itemStyle, ...restProps } = this.props;
     const locale = getComponentLocale(
       this.props,
       (this as any).context,
@@ -41,7 +41,8 @@ export default class DatePicker extends React.Component<DatePickerProps> {
         mode={this.props.mode}
         minDate={this.props.minDate}
         maxDate={this.props.maxDate}
-        defaultDate={value}
+        defaultDate={defaultDate}
+        date={value}
         onValueChange={this.props.onValueChange}
         itemStyle={itemStyle}
       />

components/date-picker/index.zh-CN.md

@@ -17,6 +17,7 @@ subtitle: 日期选择
 ----|-----|------|------
 | mode  | 日期选择的类型, 可以是日期`date`,时间`time`,日期+时间`datetime`,年`year`,月`month` | String | `date` |
 | value | 当前选中时间 | Date | 无 |
+| defaultDate | 默认选中时间 | Date | 无 |
 | minDate   | 最小可选日期 | Date  |  2000-1-1  |
 | maxDate   | 最大可选日期 | Date  |  2030-1-1  |
 | minuteStep |  分钟数递增步长设置   | Number | 1 |