Package com.vaadin.flow.component.datepicker

Class DatePicker

java.lang.Object
com.vaadin.flow.component.Component
com.vaadin.flow.component.AbstractField<C,T>
com.vaadin.flow.component.AbstractSinglePropertyField<DatePicker,LocalDate>
com.vaadin.flow.component.datepicker.DatePicker
All Implemented Interfaces:
AttachNotifier, BlurNotifier<DatePicker>, DetachNotifier, Focusable<DatePicker>, FocusNotifier<DatePicker>, HasElement, HasEnabled, HasHelper, HasLabel, HasSize, HasStyle, HasTheme, HasValidation, HasValue<AbstractField.ComponentValueChangeEvent<DatePicker,LocalDate>,LocalDate>, HasValueAndElement<AbstractField.ComponentValueChangeEvent<DatePicker,LocalDate>,LocalDate>, HasAllowedCharPattern, HasAutoOpen, HasClearButton, HasClientValidation, HasOverlayClassName, HasPrefix, HasThemeVariant<DatePickerVariant>, HasTooltip, HasValidationProperties, HasValidator<LocalDate>, Serializable
@Tag("vaadin-date-picker") @NpmPackage(value="@vaadin/polymer-legacy-adapter",version="24.0.0") @NpmPackage(value="@vaadin/date-picker",version="24.0.0") @NpmPackage(value="date-fns",version="2.29.3") @JsModule("@vaadin/polymer-legacy-adapter/style-modules.js") @JsModule("@vaadin/date-picker/src/vaadin-date-picker.js") @JsModule("./datepickerConnector.js") public class DatePicker extends AbstractSinglePropertyField<DatePicker,LocalDate> implements Focusable<DatePicker>, HasAllowedCharPattern, HasAutoOpen, HasClearButton, HasClientValidation, HasHelper, HasLabel, HasOverlayClassName, HasPrefix, HasSize, HasStyle, HasTooltip, HasThemeVariant<DatePickerVariant>, HasValidationProperties, HasValidator<LocalDate>
Date Picker is an input field that allows the user to enter a date by typing or by selecting from a calendar overlay.

DatePicker allows setting and getting LocalDate objects, setting minimum and maximum date ranges and has internationalization support by using the DatePicker.DatePickerI18n object.

This component allows the date to be entered directly using the keyboard in the format of the current locale or through the date picker overlay. The overlay opens when the field is clicked and/or any input is entered when the field is focused.

Author:
Vaadin Ltd
See Also:

  • Constructor Details

  • Method Details

    • setMin

      public void setMin(LocalDate min)
      Sets the minimum date in the date picker. Dates before that will be disabled in the popup.
      Parameters:
      min - the minimum date that is allowed to be selected, or null to remove any minimum constraints

    • getMin

      public LocalDate getMin()
      Gets the minimum date in the date picker. Dates before that will be disabled in the popup.
      Returns:
      the minimum date that is allowed to be selected, or null if there's no minimum

    • setMax

      public void setMax(LocalDate max)
      Sets the maximum date in the date picker. Dates after that will be disabled in the popup.
      Parameters:
      max - the maximum date that is allowed to be selected, or null to remove any maximum constraints

    • getMax

      public LocalDate getMax()
      Gets the maximum date in the date picker. Dates after that will be disabled in the popup.
      Returns:
      the maximum date that is allowed to be selected, or null if there's no maximum

    • setLocale

      public void setLocale(Locale locale)
      Set the Locale for the Date Picker. The displayed date will be matched to the format used in that locale.

      NOTE:Supported formats are MM/DD/YYYY, DD/MM/YYYY and YYYY/MM/DD. Browser compatibility can be different based on the browser and mobile devices, you can check here for more details: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/toLocaleDateString

      When using custom date formats through setI18n(DatePickerI18n), setting a locale has no effect, and dates will always be parsed and displayed using the custom date format.

      Parameters:
      locale - the locale set to the date picker, cannot be null

    • getLocale

      public Locale getLocale()
      Gets the Locale for this date picker
      Overrides:
      getLocale in class Component
      Returns:
      the locale used for this picker

    • onAttach

      protected void onAttach(AttachEvent attachEvent)
      Description copied from class: Component
      Called when the component is attached to a UI.

      The default implementation does nothing.

      This method is invoked before the AttachEvent is fired for the component.

      Overrides:
      onAttach in class Component
      Parameters:
      attachEvent - the attach event

    • getI18n

      public DatePicker.DatePickerI18n getI18n()
      Gets the internationalization object previously set for this component.

      Note: updating the object content that is gotten from this method will not update the lang on the component if not set back using setI18n(DatePickerI18n)

      Returns:
      the i18n object. It will be null, If the i18n properties weren't set.

    • setI18n

      public void setI18n(DatePicker.DatePickerI18n i18n)
      Sets the internationalization properties for this component.
      Parameters:
      i18n - the internationalized properties, not null

    • getDefaultValidator

      public Validator<LocalDate> getDefaultValidator()
      Description copied from interface: HasValidator
      Returns a validator that checks the state of the Value. This should be overridden for components with internal value conversion or validation, e.g. when the user is providing a string that has to be parsed into a date. An invalid input from user will be exposed to a Binder and can be seen as a validation failure.
      Specified by:
      getDefaultValidator in interface HasValidator<LocalDate>
      Returns:
      state validator

    • addValidationStatusChangeListener

      public Registration addValidationStatusChangeListener(ValidationStatusChangeListener<LocalDate> listener)
      Description copied from interface: HasValidator
      Enables the implementing components to notify changes in their validation status to the observers.

      Note: This method can be overridden by the implementing classes e.g. components, to enable the associated Binder.Binding instance subscribing for their validation change events and revalidate itself.

      This method primarily designed for notifying the Binding about the validation status changes of a bound component at the client-side. WebComponents such as <vaadin-date-picker> or any other component that accept a formatted text as input should be able to communicate their invalid status to their server-side instance, and a bound server-side component instance must notify its binding about this validation status change as well. When the binding instance revalidates, a chain of validators and convertors get executed one of which is the default validator provided by HasValidator.getDefaultValidator(). Thus, In order for the binding to be able to show/clear errors for its associated bound field, it is important that implementing components take that validation status into account while implementing any validator and converter including HasValidator.getDefaultValidator(). Here is an example: 

       @Tag("date-picker-demo")
 public class DatePickerDemo implements HasValidator<LocalDate> {

     // Each web component has a way to communicate its validation status
     // to its server-side component instance. The following clientSideValid
     // state is introduced here just for the sake of simplicity of this code
     // snippet:
     boolean clientSideValid = true;

     /**
      * Note how clientSideValid engaged in the definition
      * of this method. It is important to reflect this status either
      * in the returning validation result of this method or any other
      * validation that is associated with this component.
      */
     @Override
     public Validator getDefaultValidator() {
          return (value, valueContext) -> clientSideValid ? ValidationResult.ok()
                 : ValidationResult.error("Invalid date format");
     }

     private final Collection<ValidationStatusChangeListener<LocalDate>>
         validationStatusListeners = new ArrayList<>();

     /**
      * This enables the binding to subscribe for the validation status
      * change events that are fired by this component and revalidate
      * itself respectively.
      */
     @Override
     public Registration addValidationStatusChangeListener(
             ValidationStatusChangeListener<LocalDate> listener) {
         validationStatusListeners.add(listener);
         return () -> validationStatusListeners.remove(listener);
     }

     private void fireValidationStatusChangeEvent(
             boolean newValidationStatus) {
         if (this.clientSideValid != newValidationStatus) {
             this.clientSideValid = newValidationStatus;
             var event = new ValidationStatusChangeEvent<>(this,
                     newValidationStatus);
             validationStatusListeners.forEach(
                     listener -> listener.validationStatusChanged(event));
         }
     }
 }
      Specified by:
      addValidationStatusChangeListener in interface HasValidator<LocalDate>
      Returns:
      Registration of the added listener.
      See Also:

    • isInputValuePresent

      @Synchronize(property="_hasInputValue", value="has-input-value-changed") protected boolean isInputValuePresent()
      Returns whether the input element has a value or not.
      Returns:
      true if the input element's value is populated, false otherwise

    • setValue

      public void setValue(LocalDate value)
      Description copied from interface: HasValue
      Sets the value of this object. If the new value is not equal to getValue(), fires a value change event. May throw IllegalArgumentException if the value is not acceptable.

      Implementation note: the implementing class should document whether null values are accepted or not, and override HasValue.getEmptyValue() if the empty value is not null.

      Specified by:
      setValue in interface HasValue<AbstractField.ComponentValueChangeEvent<DatePicker,LocalDate>,LocalDate>
      Overrides:
      setValue in class AbstractField<DatePicker,LocalDate>
      Parameters:
      value - the new value

    • setLabel

      public void setLabel(String label)
      Sets the label for the datepicker.
      Specified by:
      setLabel in interface HasLabel
      Parameters:
      label - value for the label property in the datepicker

    • getLabel

      public String getLabel()
      Gets the label of the datepicker.
      Specified by:
      getLabel in interface HasLabel
      Returns:
      the label property of the datePicker

    • setPlaceholder

      public void setPlaceholder(String placeholder)
      Sets the placeholder text that should be displayed in the input element, when the user has not entered a value.
      Parameters:
      placeholder - the placeholder text

    • getPlaceholder

      public String getPlaceholder()
      The placeholder text that should be displayed in the input element, when the user has not entered a value.
      Returns:
      the placeholder property of the datepicker

    • setInitialPosition

      public void setInitialPosition(LocalDate initialPosition)
      Date which should be visible when there is no value selected.

      The same date formats as for the value property are supported.

      Parameters:
      initialPosition - the LocalDate value to set

    • getInitialPosition

      public LocalDate getInitialPosition()
      Get the visible date when there is no value selected.

      The same date formats as for the value property are supported.

      This property is not synchronized automatically from the client side, so the returned value may not be the same as in client side.

      Returns:
      the initialPosition property from the datepicker

    • setRequired

      public void setRequired(boolean required)
      Sets whether the date picker is marked as input required.
      Parameters:
      required - the boolean value to set

    • setRequiredIndicatorVisible

      public void setRequiredIndicatorVisible(boolean required)
      Description copied from interface: HasValue
      Sets the required indicator visible or not.

      If set visible, it is visually indicated in the user interface.

      The method is intended to be used with Binder which does server-side validation. In case HTML element has its own (client-side) validation it should be disabled when setRequiredIndicatorVisible(true) is called and re-enabled back on setRequiredIndicatorVisible(false). It's responsibility of each component implementation to follow the contract so that the method call doesn't do anything else than show/hide the "required" indication. Usually components provide their own setRequired method which should be called in case the client-side validation is required.

      Specified by:
      setRequiredIndicatorVisible in interface HasValue<AbstractField.ComponentValueChangeEvent<DatePicker,LocalDate>,LocalDate>
      Specified by:
      setRequiredIndicatorVisible in interface HasValueAndElement<AbstractField.ComponentValueChangeEvent<DatePicker,LocalDate>,LocalDate>
      Parameters:
      required - true to make the required indicator visible, false if not

    • isRequired

      public boolean isRequired()
      Determines whether the datepicker is marked as input required.

      This property is not synchronized automatically from the client side, so the returned value may not be the same as in client side.

      Returns:
      true if the input is required, false otherwise

    • setWeekNumbersVisible

      public void setWeekNumbersVisible(boolean weekNumbersVisible)
      Set the week number visible in the DatePicker.

      Set true to display ISO-8601 week numbers in the calendar.

      Notice that displaying week numbers is only supported when i18n.firstDayOfWeek is 1 (Monday).

      Parameters:
      weekNumbersVisible - the boolean value to set

    • isWeekNumbersVisible

      public boolean isWeekNumbersVisible()
      Get the state of showWeekNumbers property of the datepicker

      This property is not synchronized automatically from the client side, so the returned value may not be the same as in client side.

      Returns:
      the showWeekNumbers property from the datepicker

    • setOpened

      public void setOpened(boolean opened)
      Sets the opened property of the datepicker to open or close its overlay.
      Parameters:
      opened - true to open the datepicker overlay, false to close it

    • open

      public void open()
      Opens the datepicker overlay.

    • close

      protected void close()
      Closes the datepicker overlay.

    • isOpened

      public boolean isOpened()
      Gets the states of the drop-down for the datepicker
      Returns:
      true if the drop-down is opened, false otherwise

    • setName

      public void setName(String name)
      Sets the name of the DatePicker.
      Parameters:
      name - the string value to set

    • getName

      public String getName()
      Gets the name of the DatePicker.
      Returns:
      the name property from the DatePicker

    • validate

      protected void validate()
      Performs server-side validation of the current value. This is needed because it is possible to circumvent the client-side validation constraints using browser development tools.

    • addOpenedChangeListener

      public Registration addOpenedChangeListener(ComponentEventListener<DatePicker.OpenedChangeEvent> listener)
      Adds a listener for opened-changed events fired by the webcomponent.
      Parameters:
      listener - the listener
      Returns:
      a Registration for removing the event listener

    • addInvalidChangeListener

      public Registration addInvalidChangeListener(ComponentEventListener<DatePicker.InvalidChangeEvent> listener)
      Adds a listener for invalid-changed events fired by the webcomponent.
      Parameters:
      listener - the listener
      Returns:
      a Registration for removing the event listener