elemental.html.MediaQueryList Maven / Gradle / Ivy
/*
* Copyright 2012 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 elemental.html;
import elemental.events.*;
import elemental.util.*;
import elemental.dom.*;
import elemental.html.*;
import elemental.css.*;
import elemental.stylesheets.*;
import java.util.Date;
/**
* DRAFT
This page is not complete.
A MediaQueryList object maintains a list of media queries on a document
, and handles sending notifications to listeners when the media queries on the document change.
This makes it possible to observe a document to detect when its media queries change, instead of polling the values periodically, if you need to programmatically detect changes to the values of media queries on a document.
*/
public interface MediaQueryList {
/**
* true if the document
currently matches the media query list; otherwise false. Read only.
*/
boolean isMatches();
/**
* The serialized media query list.
*/
String getMedia();
/**
* Adds a new listener to the media query list. If the specified listener is already in the list, this method has no effect.
Parameters
listener- The
MediaQueryListListener
to invoke when the media query's evaluated result changes.
*/
void addListener(MediaQueryListListener listener);
/**
* Removes a listener from the media query list. Does nothing if the specified listener isn't already in the list.
Parameters
listener- The
MediaQueryListListener
to stop calling on changes to the media query's evaluated result.
*/
void removeListener(MediaQueryListListener listener);
}