/*******************************************************************************
* Copyright (c) 2011-2014 Fernando Petrola
*
* This file is part of Dragome SDK.
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the GNU Public License v3.0
* which accompanies this distribution, and is available at
* http://www.gnu.org/licenses/gpl.html
******************************************************************************/
package com.dragome.render.html.components;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import org.w3c.dom.Element;
import com.dragome.commons.javascript.ScriptHelper;
import com.dragome.model.interfaces.Renderer;
import com.dragome.model.interfaces.ValueChangeEvent;
import com.dragome.model.interfaces.ValueChangeHandler;
import com.dragome.model.interfaces.VisualComponent;
import com.dragome.model.interfaces.VisualListBox;
import com.dragome.model.listeners.ClickListener;
import com.dragome.remote.entities.DragomeEntityManager;
import com.dragome.render.canvas.interfaces.Canvas;
import com.dragome.services.ServiceLocator;
import com.dragome.templates.HTMLTemplateRenderer;
public class HTMLListRenderer extends AbstractHTMLComponentRenderer<VisualListBox<Object>>
{
public HTMLListRenderer()
{
}
public Canvas<Element> render(final VisualListBox<Object> visualList)
{
final String id= DragomeEntityManager.add(visualList);
// visualList.addValueChangeHandler(new ValueChangeHandler<Object>()
// {
// public void onValueChange(ValueChangeEvent<Object> event)
// {
// final DomHandler domHandler= ServiceLocator.getInstance().getDomHandler();
// Element elementById= domHandler.getDocument().getElementById(id);
// elementById.setAttribute("value", (String) event.getValue());
// }
// });
final Element selectElement= ServiceLocator.getInstance().getDomHandler().getDocument().createElement("select");
visualList.addValueChangeHandler(new ValueChangeHandler<Object>()
{
public void onValueChange(ValueChangeEvent<Object> event)
{
if (event.getValue() instanceof Collection)
selectValue(selectElement, (Collection) event.getValue());
else
selectValue(selectElement, Arrays.asList(event.getValue()));
}
private void selectValue(final Element selectElement, Collection<Object> values)
{
Renderer<Object> renderer= visualList.getRenderer();
ScriptHelper.put("renderedValues", new Object(), this);
ScriptHelper.eval("renderedValues={}", this);
for (Object object : values)
{
ScriptHelper.put("value", renderer.render(object), this);
ScriptHelper.evalNoResult("renderedValues[value]=true", this);
}
ScriptHelper.put("sel", selectElement, this);
ScriptHelper.evalNoResult("for(var opt, j = 0; opt = sel.node.options[j]; j++) {opt.selected= renderedValues[opt.value]; }", this);
}
});
visualList.addListener(ClickListener.class, new ClickListener()
{
public void clickPerformed(VisualComponent aVisualComponent)
{
ScriptHelper.put("e", selectElement, this);
if (ScriptHelper.evalBoolean("e.node.multiple", this))
{
String values= (String) ScriptHelper.eval("(function (){for (var options = e.node.options, values= [], i = 0, len = options.length; i < len;i++) if (options[i].selected) values.push(options[i].value); return values.join(',')})()", this);
visualList.setSelectedValues((List) Arrays.asList(values.split(",")));
}
else
{
String value= (String) ScriptHelper.eval("e.node.options[e.node.selectedIndex].value", this);
visualList.setValue(value);
}
}
});
selectElement.setAttribute(COMPONENT_ID_ATTRIBUTE, id);
selectElement.setAttribute("size", getSelectElementSize() + "");
selectElement.setAttribute("style", "min-width:300px;");
if (visualList.isMultipleItems())
selectElement.setAttribute("multiple", "multiple");
int i= 1;
String options= "";
for (Object element : visualList.getAcceptableValues())
{
Renderer<Object> renderer= visualList.getRenderer();
String rendered= renderer.render(element);
Object value= visualList.getValue();
String selected= "";
boolean isSelected= visualList.isMultipleItems() && visualList.getSelectedValues().contains(element);
isSelected|= !visualList.isMultipleItems() && element.equals(value);
if (isSelected)
selected= "selected=\"selected\"";
String option= "<option value=\"" + rendered + "\" " + selected + ">" + rendered + "</option>\n";
options+= option;
}
selectElement.setAttribute(HTMLTemplateRenderer.INNER_HTML, options);
addListeners(visualList, selectElement);
Canvas<Element> canvas= ServiceLocator.getInstance().getTemplateManager().getCanvasFactory().createCanvas();
canvas.setContent(selectElement);
return canvas;
}
protected int getSelectElementSize()
{
return 5;
}
}