2 * Copyright (C) 2008 ZXing authors
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 package com.google.zxing.web.generator.client;
19 import com.google.gwt.user.client.ui.Grid;
20 import com.google.gwt.user.client.ui.Widget;
23 * Base interface for any generator.
25 * @author Yohann Coppel
27 public interface GeneratorSource {
29 * @return a GWT Grid object, containing the GUI.
31 public Grid getWidget();
33 * @return the name of the generator to be used in the GUI.
35 public String getName();
37 * @return the text to be encoded into the QR code.
38 * @throws GeneratorException if the input data contains errors.
40 public String getText() throws GeneratorException;
42 * @param widget the widget that was last modified, and that we want to
43 * validate the content.
44 * @throws GeneratorException if the widget contains errors.
46 public void validate(Widget widget) throws GeneratorException;
48 * Called when the generator is selected in the list. Using this method,
49 * the generator should set the focus to the first widget it defines.
51 public void setFocus();