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30 day Evaluation Version distributed via the Maven Jar Repository. Clover is not free. You have 30 days to evaluate it. Please visit http://www.thecortex.net/clover to obtain a licensed version of Clover | |||||||||||||||||||
Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
Radio.java | 100% | 100% | 100% | 100% |
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// Copyright 2004, 2005 The Apache Software Foundation
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package org.apache.tapestry.form;
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import org.apache.hivemind.ApplicationRuntimeException;
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import org.apache.tapestry.AbstractComponent;
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import org.apache.tapestry.IMarkupWriter;
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import org.apache.tapestry.IRequestCycle;
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import org.apache.tapestry.Tapestry;
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/**
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* Implements a component that manages an HTML <input type=radio> form element.
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* Such a component must be wrapped (possibly indirectly)
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* inside a {@link RadioGroup} component.
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*
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* [<a href="../../../../../ComponentReference/Radio.html">Component Reference</a>]
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*
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*
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* <p>{@link Radio} and {@link RadioGroup} are generally not used (except
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* for very special cases). Instead, a {@link PropertySelection} component is used.
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*
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*
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* @author Howard Lewis Ship
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*
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**/
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public abstract class Radio extends AbstractComponent |
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{ |
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/**
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* Renders the form element, or responds when the form containing the element
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* is submitted (by checking {@link Form#isRewinding()}.
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*
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*
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**/
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protected void renderComponent(IMarkupWriter writer, IRequestCycle cycle) |
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{ |
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RadioGroup group = RadioGroup.get(cycle); |
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if (group == null) |
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throw new ApplicationRuntimeException( |
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Tapestry.getMessage("Radio.must-be-contained-by-group"),
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this,
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null,
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null);
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// The group determines rewinding from the form.
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boolean rewinding = group.isRewinding();
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int option = group.getNextOptionId();
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if (rewinding)
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{ |
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// If not disabled and this is the selected button within the radio group,
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// then update set the selection from the group to the value for this
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// radio button. This will update the selected parameter of the RadioGroup.
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if (!isDisabled() && !group.isDisabled() && group.isSelected(option))
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group.updateSelection(getValue()); |
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return;
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} |
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writer.beginEmpty("input");
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writer.attribute("type", "radio"); |
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writer.attribute("name", group.getName());
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// As the group if the value for this Radio matches the selection
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// for the group as a whole; if so this is the default radio and is checked.
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if (group.isSelection(getValue()))
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writer.attribute("checked", "checked"); |
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if (isDisabled() || group.isDisabled())
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writer.attribute("disabled", "disabled"); |
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// The value for the Radio matches the option number (provided by the RadioGroup).
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// When the form is submitted, the RadioGroup will know which option was,
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// in fact, selected by the user.
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writer.attribute("value", option);
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renderInformalParameters(writer, cycle); |
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} |
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public abstract boolean isDisabled(); |
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public abstract Object getValue();
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} |
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