/**
* Copyright © 2002 Instituto Superior Técnico
*
* This file is part of FenixEdu Academic.
*
* FenixEdu Academic is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* FenixEdu Academic is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with FenixEdu Academic. If not, see <http://www.gnu.org/licenses/>.
*/
package org.fenixedu.academic.ui.renderers;
import pt.ist.fenixWebFramework.rendererExtensions.AutoCompleteInputRenderer;
import pt.ist.fenixWebFramework.renderers.components.HtmlBlockContainer;
import pt.ist.fenixWebFramework.renderers.components.HtmlComponent;
import pt.ist.fenixWebFramework.renderers.components.HtmlHiddenField;
import pt.ist.fenixWebFramework.renderers.components.controllers.HtmlController;
import pt.ist.fenixWebFramework.renderers.components.state.IViewState;
import pt.ist.fenixWebFramework.renderers.components.state.ViewDestination;
import pt.ist.fenixWebFramework.renderers.model.MetaSlot;
/**
* This renderer extends the {@link AutoCompleteInputRenderer} and allows to
* perform a postback whenever a valid option listed as auto-completion is
* chosen.
*
* @author João Neves - JoaoRoxoNeves@ist.utl.pt
*/
public class AutoCompleteInputRendererWithPostBack extends AutoCompleteInputRenderer {
private final String HIDDEN_NAME = "postback";
private String destination;
public String getDestination() {
return destination;
}
/**
* Allows to choose the postback destination. If this property is not
* specified the default "postback" destination is used.
*
* @property
*/
public void setDestination(String destination) {
this.destination = destination;
}
@Override
public HtmlComponent render(Object object, Class type) {
String prefix =
HtmlComponent.getValidIdOrName(((MetaSlot) getInputContext().getMetaObject()).getKey().toString()
.replaceAll("\\.", "_").replaceAll("\\:", "_"));
HtmlHiddenField hidden = new HtmlHiddenField(prefix + HIDDEN_NAME, "");
HtmlBlockContainer container = (HtmlBlockContainer) super.render(object, type);
HtmlHiddenField hiddenValue = null;
for (HtmlComponent childComponent : container.getChildren()) {
if ((childComponent instanceof HtmlHiddenField) && (childComponent.getId().endsWith("_AutoComplete"))) {
hiddenValue = (HtmlHiddenField) childComponent;
}
}
hiddenValue.setOnChange("this.form." + prefix + HIDDEN_NAME + ".value='true';this.form.submit();");
hiddenValue.setController(new PostBackController(hidden, getDestination()));
container.addChild(hidden);
return container;
}
private static class PostBackController extends HtmlController {
private final HtmlHiddenField hidden;
private final String destination;
public PostBackController(HtmlHiddenField hidden, String destination) {
this.hidden = hidden;
this.destination = destination;
}
@Override
public void execute(IViewState viewState) {
if (hidden.getValue() != null && hidden.getValue().equalsIgnoreCase("true")) {
String destinationName = this.destination == null ? "postback" : this.destination;
ViewDestination destination = viewState.getDestination(destinationName);
if (destination != null) {
viewState.setCurrentDestination(destination);
} else {
viewState.setCurrentDestination("postBack");
}
hidden.setValue("false");
viewState.setSkipValidation(true);
}
}
}
}