[richfaces-issues] [JBoss JIRA] Created: (RF-961) Drag'n Drop: dragValue is null, when dragging across different regions

Tue Sep 18 11:22:11 EDT 2007

Drag'n Drop: dragValue is null, when dragging across different regions
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                 Key: RF-961
                 URL: http://jira.jboss.com/jira/browse/RF-961
             Project: RichFaces
          Issue Type: Bug
    Affects Versions: 3.1.0
            Reporter: Maksim Kaszynski
         Assigned To: Maksim Kaszynski
             Fix For: 3.2.0

On the following page, dragValue is null.

In terms of JSF concepts, everything is correct - other regions just don't get processed.
maybe, we should hack it in some way.

<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h"%>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f"%>
<%@ taglib uri="http://richfaces.org/a4j" prefix="a4j"%>
<%@ taglib uri="http://labs.jboss.com/jbossrichfaces/ui/drag-drop" prefix="rich"%>
<%@ taglib uri="http://labs.jboss.com/jbossrichfaces/ui/panel" prefix="p"%>
<%@ taglib uri="http://labs.jboss.com/jbossrichfaces/ui/dataTable" prefix="t"%>

<html>
<head>
</head>
<body>
<f:view>
	<center><rich:dragIndicator id="indicator"></rich:dragIndicator>
	<h:form>
		<h:panelGrid styleClass="generalTable">
			<a4j:region>
			<p:panel>
				<t:dataTable id="iItems" value="#{PjCreationDataBean.initItems}" var="item">
					<t:column>
						<a4j:outputPanel style="border:1px;">
							<rich:dragSupport dragType="item" dragIndicator=":indicator"
								dragValue="#{item}">
								<rich:dndParam name="label" value="#{item.item}" />
							</rich:dragSupport>
							<h:outputText value="#{item.item}" />
						</a4j:outputPanel>
					</t:column>
				</t:dataTable>
			</p:panel>
			</a4j:region>
			<a4j:region>
			<p:panel>
				<rich:dropSupport acceptedTypes="item"
					dropListener="#{WeaponDropListener.processDrop}"
					dropValue="#{PjCreationDataBean.selectedItems}" reRender="sItems">
				</rich:dropSupport>
				<t:dataTable id="sItems"
					value="#{PjCreationDataBean.selectedItems}" var="item">
					<t:column>
						<a4j:outputPanel style="border:1px;">
							<h:outputText value="#{item.item}" />
						</a4j:outputPanel>
					</t:column>
				</t:dataTable>
			</p:panel>
			</a4j:region>
		</h:panelGrid>
		<center>
	</h:form>
</f:view>
</body>
</html>

public class WeaponDropListener implements DropListener{

    public void processDrop(DropEvent event) {
        Dropzone dropZone = (Dropzone) event.getComponent();
        ArrayList<InitItem> selected = (ArrayList) dropZone.getDropValue();
        System.err.print(selected.size());
        Object ob = event.getDragValue();
        System.out.println("DragValue " + event.getDragValue());
        System.out.println("DropValue " + event.getDropValue());
        if(ob == null)
            System.err.print("objeto nulo");
        selected.add((InitItem) event.getDragValue());

    }
}

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