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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 | |||||||||||||||
ImageSubmit.java | 0% | 0% | 0% | 0% |
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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 java.awt.Point;
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import org.apache.tapestry.IActionListener;
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import org.apache.tapestry.IAsset;
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import org.apache.tapestry.IBinding;
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import org.apache.tapestry.IForm;
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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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* Used to create an image button inside a {@link Form}. Although it is occasionally useful to know
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* the {@link Point}on the image that was clicked (i.e., use the image as a kind of image map,
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* which was the original intent of the HTML element), it is more commonly used to provide a graphic
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* image for the user to click, rather than the rather plain <input type=submit>. [ <a
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* href="../../../../../ComponentReference/ImageSubmit.html">Component Reference </a>]
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*
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* @author Howard Lewis Ship
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*/
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public abstract class ImageSubmit extends AbstractFormComponent |
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{ |
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protected void renderComponent(IMarkupWriter writer, IRequestCycle cycle) |
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{ |
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IForm form = getForm(cycle); |
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if (form.wasPrerendered(writer, this)) |
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return;
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boolean rewinding = form.isRewinding();
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String nameOverride = getNameOverride(); |
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String name = nameOverride == null ? form.getElementId(this) : form.getElementId( |
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this,
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nameOverride); |
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if (rewinding)
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{ |
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// If disabled, do nothing.
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if (isDisabled())
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return;
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// Image clicks get submitted as two request parameters:
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// foo.x and foo.y
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String parameterName = name + ".x";
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String value = cycle.getParameter(parameterName); |
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if (value == null) |
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return;
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// The point parameter is not really used, unless the
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// ImageButton is used for its original purpose (as a kind
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// of image map). In modern usage, we only care about
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// whether the user clicked on the image (and thus submitted
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// the form), not where in the image the user actually clicked.
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IBinding pointBinding = getBinding("point");
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if (pointBinding != null) |
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{ |
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int x = Integer.parseInt(value);
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parameterName = name + ".y";
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value = cycle.getParameter(parameterName); |
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int y = Integer.parseInt(value);
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pointBinding.setObject(new Point(x, y));
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} |
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// Notify the application, by setting the select parameter
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// to the tag parameter.
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IBinding selectedBinding = getBinding("selected");
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if (selectedBinding != null) |
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selectedBinding.setObject(getTag()); |
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IActionListener listener = getListener(); |
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if (listener != null) |
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listener.actionTriggered(this, cycle);
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return;
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} |
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// Not rewinding, do the real render
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boolean disabled = isDisabled();
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IAsset disabledImage = getDisabledImage(); |
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IAsset finalImage = (disabled && disabledImage != null) ? disabledImage : getImage();
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String imageURL = finalImage.buildURL(cycle); |
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writer.beginEmpty("input");
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writer.attribute("type", "image"); |
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writer.attribute("name", name);
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if (disabled)
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writer.attribute("disabled", "disabled"); |
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// NN4 places a border unless you tell it otherwise.
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// IE ignores the border attribute and never shows a border.
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writer.attribute("border", 0);
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writer.attribute("src", imageURL);
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renderInformalParameters(writer, cycle); |
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writer.closeTag(); |
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} |
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public abstract boolean isDisabled(); |
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public abstract IAsset getDisabledImage();
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public abstract IAsset getImage();
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public abstract IActionListener getListener();
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public abstract Object getTag();
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public abstract String getNameOverride();
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protected void prepareForRender(IRequestCycle cycle) |
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{ |
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super.prepareForRender(cycle);
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if (getImage() == null) |
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throw Tapestry.createRequiredParameterException(this, "image"); |
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} |
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} |
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