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Vaadin is a web application framework for Rich Internet Applications (RIA). Vaadin enables easy development and maintenance of fast and secure rich web applications with a stunning look and feel and a wide browser support. It features a server-side architecture with the majority of the logic running on the server. Ajax technology is used at the browser-side to ensure a rich and interactive user experience.

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/*
 * Copyright 2008 Google Inc.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package com.google.gwt.user.datepicker.client;

import java.util.Date;

/**
 * The CalendarView is a calendar grid that represents the current view of a
 * {@link DatePicker}. Note, the calendar view only deals with the currently
 * visible dates and all state is flushed when the calendar view is refreshed.
 * 
 */
public abstract class CalendarView extends DatePickerComponent {

  /**
   * Constructor.
   */
  public CalendarView() {
  }

  /**
   * Adds a style name to the cell of the supplied date. This style is only set
   * until the next time the {@link CalendarView} is refreshed.
   * 
   * @param styleName style name to add
   * @param date date that will have the supplied style added
   */
  public abstract void addStyleToDate(String styleName, Date date);

  /**
   * Returns the first date that is currently shown by the calendar.
   * 
   * @return the first date.
   */
  public abstract Date getFirstDate();

  /**
   * Returns the last date that is currently shown by the calendar.
   * 
   * @return the last date.
   */
  public abstract Date getLastDate();

  /**
   * Is the cell representing the given date enabled?
   * 
   * @param date the date
   * @return is the date enabled
   */
  public abstract boolean isDateEnabled(Date date);

  /**
   * Removes a visible style name from the cell of the supplied date.
   * 
   * @param styleName style name to remove
   * @param date date that will have the supplied style added
   */
  public abstract void removeStyleFromDate(String styleName, Date date);

  /**
   * Sets aria-selected in the given date's cell and clears the other cells.
   *
   * @param date the date of the cell where aria-selected should be set,
   * or null to clear aria-selected.
   */
  public void setAriaSelectedCell(Date date) {
  }

  /**
   * Enables or Disables a particular date. by default all valid dates are
   * enabled after a rendering event. Disabled dates cannot be selected.
   * 
   * @param enabled true for enabled, false for disabled
   * @param date date to enable or disable
   */
  public abstract void setEnabledOnDate(boolean enabled, Date date);

  /**
   * Allows the calendar view to update the date picker's highlighted date.
   * 
   * @param date the highlighted date
   */
  protected final void setHighlightedDate(Date date) {
    getDatePicker().setHighlightedDate(date);
  }
}