1 /*
2 * Copyright 2012 Daniel Kurka
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
5 * use this file except in compliance with the License. You may obtain a copy of
6 * the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13 * License for the specific language governing permissions and limitations under
14 * the License.
15 */
16 package com.googlecode.mgwt.dom.client.recognizer.pinch;
17
18 /**
19 * {@link PinchRecognizer} needs to know about display settings to calculate a
20 * pinch properly, but it should not know about widgets. THis is an abstraction
21 * interface to encapsulate that knowledge
22 *
23 * @author Daniel
24 *
25 */
26 public interface OffsetProvider {
27 /**
28 * the upper left corner of the widget
29 *
30 * @return the upper left corner in px
31 */
32 public int getLeft();
33
34 /**
35 * the upper left corner of the widget
36 *
37 * @return the upper left corner in px
38 */
39 public int getTop();
40 }