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ILinkComponent.java | - | - | - | - |
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1 | // Copyright 2004, 2005 The Apache Software Foundation | |
2 | // | |
3 | // Licensed under the Apache License, Version 2.0 (the "License"); | |
4 | // you may not use this file except in compliance with the License. | |
5 | // You may obtain a copy of the License at | |
6 | // | |
7 | // http://www.apache.org/licenses/LICENSE-2.0 | |
8 | // | |
9 | // Unless required by applicable law or agreed to in writing, software | |
10 | // distributed under the License is distributed on an "AS IS" BASIS, | |
11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
12 | // See the License for the specific language governing permissions and | |
13 | // limitations under the License. | |
14 | ||
15 | package org.apache.tapestry.components; | |
16 | ||
17 | import org.apache.tapestry.IComponent; | |
18 | import org.apache.tapestry.IMarkupWriter; | |
19 | import org.apache.tapestry.IRequestCycle; | |
20 | import org.apache.tapestry.engine.ILink; | |
21 | ||
22 | /** | |
23 | * A component that renders an HTML <a> element. It exposes some | |
24 | * properties to the components it wraps. This is basically to facilitate | |
25 | * the {@link org.apache.tapestry.html.Rollover} component. | |
26 | * | |
27 | * @author Howard Lewis Ship | |
28 | * | |
29 | **/ | |
30 | ||
31 | public interface ILinkComponent extends IComponent | |
32 | { | |
33 | ||
34 | /** | |
35 | * Returns whether this service link component is enabled or disabled. | |
36 | * | |
37 | * @since 0.2.9 | |
38 | * | |
39 | **/ | |
40 | ||
41 | public boolean isDisabled(); | |
42 | ||
43 | /** | |
44 | * Returns the anchor defined for this link, or null for no anchor. | |
45 | * | |
46 | * @since 3.0 | |
47 | * | |
48 | **/ | |
49 | ||
50 | public String getAnchor(); | |
51 | ||
52 | /** | |
53 | * Returns the name of the target window or frame for this link, | |
54 | * or null if current window or frame is to be used. | |
55 | * | |
56 | * @since 4.0 | |
57 | */ | |
58 | public String getTarget(); | |
59 | ||
60 | /** | |
61 | * Adds a new event handler. When the event occurs, the JavaScript function | |
62 | * specified is executed. Multiple functions can be specified, in which case | |
63 | * all of them are executed. | |
64 | * | |
65 | * <p>This was created for use by | |
66 | * {@link org.apache.tapestry.html.Rollover} to set mouse over and mouse out handlers on | |
67 | * the {@link ILinkComponent} that wraps it, but can be used for | |
68 | * many other things as well. | |
69 | * | |
70 | * @since 0.2.9 | |
71 | **/ | |
72 | ||
73 | public void addEventHandler(LinkEventType type, String functionName); | |
74 | ||
75 | /** | |
76 | * Invoked by the {@link org.apache.tapestry.link.ILinkRenderer} (if | |
77 | * the link is not disabled) to provide a | |
78 | * {@link org.apache.tapestry.engine.EngineServiceLink} that the renderer can convert | |
79 | * into a URL. | |
80 | * | |
81 | **/ | |
82 | ||
83 | public ILink getLink(IRequestCycle cycle); | |
84 | ||
85 | /** | |
86 | * Invoked (by the {@link org.apache.tapestry.link.ILinkRenderer}) | |
87 | * to make the link render any additional attributes. These | |
88 | * are informal parameters, plus any attributes related to events. | |
89 | * This is only invoked for non-disabled links. | |
90 | * | |
91 | * @since 3.0 | |
92 | * | |
93 | **/ | |
94 | ||
95 | public void renderAdditionalAttributes(IMarkupWriter writer, IRequestCycle cycle); | |
96 | } |
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