Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||||||
Option |
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| 2.5;2.5 |
1 | // Copyright 2004, 2005 The Apache Software Foundation |
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2 | // |
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3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
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4 | // you may not use this file except in compliance with the License. |
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5 | // You may obtain a copy of the License at |
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6 | // |
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7 | // http://www.apache.org/licenses/LICENSE-2.0 |
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8 | // |
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9 | // Unless required by applicable law or agreed to in writing, software |
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10 | // distributed under the License is distributed on an "AS IS" BASIS, |
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11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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12 | // See the License for the specific language governing permissions and |
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13 | // limitations under the License. |
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14 | ||
15 | package org.apache.tapestry.form; |
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16 | ||
17 | import org.apache.hivemind.ApplicationRuntimeException; |
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18 | import org.apache.tapestry.AbstractComponent; |
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19 | import org.apache.tapestry.IMarkupWriter; |
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20 | import org.apache.tapestry.IRequestCycle; |
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21 | import org.apache.tapestry.Tapestry; |
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22 | ||
23 | /** |
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24 | * A component that renders an HTML <option> form element. Such a component must be wrapped |
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25 | * (possibly indirectly) inside a {@link Select}component. [ <a |
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26 | * href="../../../../../ComponentReference/Option.html">Component Reference </a>] |
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27 | * |
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28 | * @author Howard Lewis Ship |
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29 | */ |
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30 | ||
31 | 0 | public abstract class Option extends AbstractComponent |
32 | { |
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33 | /** |
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34 | * Renders the <option> element, or responds when the form containing the element is |
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35 | * submitted (by checking {@link Form#isRewinding()}. |
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36 | * <p> |
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37 | * If the <code>label</code> property is set, it is inserted inside the <option> |
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38 | * element. |
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39 | */ |
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40 | ||
41 | protected void renderComponent(IMarkupWriter writer, IRequestCycle cycle) |
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42 | { |
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43 | 0 | Select select = Select.get(cycle); |
44 | 0 | if (select == null) |
45 | 0 | throw new ApplicationRuntimeException(Tapestry |
46 | .getMessage("Option.must-be-contained-by-select"), this, null, null); |
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47 | ||
48 | // It isn't enough to know whether the cycle in general is rewinding, need to know |
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49 | // specifically if the form which contains this component is rewinding. |
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50 | ||
51 | 0 | boolean rewinding = select.isRewinding(); |
52 | ||
53 | 0 | String value = select.getNextOptionId(); |
54 | ||
55 | 0 | if (rewinding) |
56 | { |
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57 | 0 | if (!select.isDisabled()) |
58 | 0 | setSelected(select.isSelected(value)); |
59 | ||
60 | 0 | renderBody(writer, cycle); |
61 | } |
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62 | else |
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63 | { |
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64 | 0 | writer.begin("option"); |
65 | ||
66 | 0 | writer.attribute("value", value); |
67 | ||
68 | 0 | if (isSelected()) |
69 | 0 | writer.attribute("selected", "selected"); |
70 | ||
71 | 0 | renderInformalParameters(writer, cycle); |
72 | ||
73 | 0 | String label = getLabel(); |
74 | ||
75 | 0 | if (label != null) |
76 | 0 | writer.print(label); |
77 | ||
78 | 0 | renderBody(writer, cycle); |
79 | ||
80 | 0 | writer.end(); |
81 | } |
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82 | ||
83 | 0 | } |
84 | ||
85 | public abstract String getLabel(); |
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86 | ||
87 | public abstract boolean isSelected(); |
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88 | ||
89 | public abstract void setSelected(boolean selected); |
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90 | } |