我有一个要求用户可以在datepicker中选择多个日期,但是在每个日期选择之后,mat-datepicker关闭,我想防止mat-datepicker在日期选择上关闭,并且当我们在datepicker或外部单击时关闭datepicker。在日历图标上。
我在mat-datepicker上尝试了closed
事件,但是每个日期选择项上的日期选择器都闪烁,并且当我们在日期选择器外部单击时,日期选择器没有关闭。
这是我尝试过的:
html代码:
<input formControlName="fromDate" matInput [matDatepicker]="fromDatePicker" placeholder="From Date" [min]="minDate" readonly>
<mat-datepicker-toggle matSuffix [for]="fromDatePicker"></mat-datepicker-toggle>
<mat-datepicker #fromDatePicker (closed)="_openCalendar(fromDatePicker)"></mat-datepicker>
打字稿代码:
_openCalendar(picker: MatDatepicker<Date>) {
picker.open();
}
答案 0 :(得分:3)
防止覆盖层关闭的方法是更改 MatCalendar._userSelected 方法。
如果查看MatDatePickerContent模板,您会注意到 _userSelection 发出时的调用。调用将关闭叠加层:(_userSelection)="datepicker.close()"
。
现在, _userSelection 在 MatCalendar._userSelected 中发出。
datepicker.js,第1687行,“ @ angular / material”:“ 8.2.3”:
_userSelected() {
this._userSelection.emit();
}
因为我不希望应用程序中所有DatePicker实例具有此行为,所以在我的组件中,我这样做如下:
@ViewChild('picker', { static: true })
private picker: MatDatepicker<Date>;
private preventCloseOnSelection = true;
private readonly initCalendarUserSelected: () => void;
public model: Array<Date>;
constructor(private readonly cdr: ChangeDetectorRef) {
this.initCalendarUserSelected = MatCalendar.prototype._userSelected;
}
public ngAfterViewInit() {
this.picker.calendarHeaderComponent = CalendarTimeHeaderComponent;
this.picker.openedStream
.pipe(takeUntil(this.isUnsubscribing))
.subscribe(() => {
if (this.preventCloseOnSelection) {
MatCalendar.prototype._userSelected = () => {};
} else {
MatCalendar.prototype._userSelected = this.initCalendarUserSelected;
}
this.cdr.detectChanges();
});
}
public ngOnDestroy() {
MatCalendar.prototype._userSelected = this.initCalendarUserSelected;
}
如果您希望日期选择器的所有实例都具有此行为,则可以覆盖 AppComponent 中某处的 MatCalendar._userSelected 方法,而不必费心进行还原。
>另一种方法是在更改日期后执行this.picker.close = () => { };
,但是必须始终将其还原才能关闭叠加层。
您可以通过 matDatepickerInput 的 dateChange 事件获取所选日期,并创建一个包含多个值的日期的数组,并在视图中进行选择。使用 matDatepicker 的 dateClass 输入。
查看:
<input [(ngModel)]="model" matInput [matDatepicker]="picker" placeholder="Choose a date" (dateChange)="dateChanged($event)" />
<mat-datepicker-toggle matPrefix [for]="picker"></mat-datepicker-toggle>
<mat-datepicker #picker [dateClass]="dateClass"></mat-datepicker>
方法:
public dateClass = (date: Date) => {
if (this.model.map((m) => +m).indexOf(+date) !== -1) {
return [ 'selected' ];
}
return [ ];
}
public dateChanged(event: MatDatepickerInputEvent<Date>) {
if (event.value) {
const date = event.value;
const index = this.model.map((m) => +m).indexOf(+date);
if (index === -1) {
this.model.push(date);
} else {
this.model.splice(index, 1)
}
}
}
答案 1 :(得分:0)
在日期范围选择器的情况下,我解决了这个问题,如下所示:
export class MatDatetimeComponent {
@ViewChild(MatDateRangePicker) containerElRef;
constructor(
private resolver: ComponentFactoryResolver,
private cdr: ChangeDetectorRef,
private cdkConnectedOverlay: OverlayOutsideClickDispatcher
) {}
// store prototype close object
private selfClose: () => void;
ngAfterViewInit() {
this.selfClose = this.containerElRef.close;
}
public onOpen() {
// rewrite autoclose after date is chosen
this.containerElRef.close = () => {};
// close calendar manually on outside click
this.cdkConnectedOverlay._attachedOverlays[0]._outsidePointerEvents.subscribe(() => {
// restore saved close method
this.containerElRef.close = this.selfClose;
this.containerElRef.close();
});
}
}
答案 2 :(得分:0)
因为其他解决方案对我不起作用,所以我这样做了:
打字稿代码:
@ViewChild(MatDatepicker) datePicker: MatDatepicker<Date>;
constructor(
private changeDetectorRef: ChangeDetectorRef,
private cdkConnectedOverlay: OverlayOutsideClickDispatcher) { }
// store prototype close object
private selfClose: () => void;
opened() {
if (isNullOrUndefined(this.selfClose)) {
this.selfClose = this.datePicker.close;
}
// rewrite autoclose after date is chosen
this.datePicker.close = () => {};
// close calendar manually on outside click
this.cdkConnectedOverlay._attachedOverlays[0]._outsidePointerEvents.subscribe(() => {
// restore saved close method
this.datePicker.close = this.selfClose;
this.selfClose = undefined;
this.datePicker.close();
});
}
架构代码:
<mat-datepicker #picker
(opened)="opened()"
></mat-datepicker>
也许这可以帮助那里的人。