Hi,
I'm repainting all the content of a FlowPanel that have
DraggableWidget<DockPanel>.
I don't know where the application return the error, because the error is
internal of GWT libraries.
The error is caused in this code:
public static void loadArbre(HandlerManager eventBus) {
List<FilaPanel> files = EditorView.getInstance().getFiles();
FlowPanel panell = EditorView.getInstance().getPanell();
files.clear();
*panell.clear();*
List<Fila> filesArbre =
DRGUtils.getArbre().getElementRegistre(1).getElementNivell(1).getFiles();
for(int idFila=0; idFila<filesArbre.size(); idFila++) {
Fila fila = filesArbre.get(idFila);
FilaPanel filaPanel = new FilaPanel(false, idFila+1);
filaPanel.setWidth(FilaPanel.WIDTH_FILA + "px");
filaPanel.recalculaEspaisWidgets(FilaPanel.WIDTH_FILA,
FilaPanel.SPACING_FILA);
files.add(filaPanel);
panell.add(filaPanel);
for(int idElement=0; idElement<fila.getElements().size();
idElement++) {
Component component = fila.getElements().get(idElement);
if(component instanceof Requadre) {
RequadrePanel requadre = new RequadrePanel("" +
((Requadre)component).getId(), false);
requadre.setFila(filaPanel);
filaPanel.addElement(idElement, requadre);
requadre.setHeight(FilaPanel.HEIGHT_FILA);
requadre.setEventBus(eventBus);
DRGUtils.inicialitzaFilesRequadre(((Requadre)component).getId());
for(int idFilaRequadre=0;
idFilaRequadre<((Requadre)component).getFilesRequadre().size();
idFilaRequadre++) {
Fila filaRequadre =
((Requadre)component).getFilesRequadre().get(idFilaRequadre);
FilaRequadrePanel filaRequadrePanel = new
FilaRequadrePanel(false, filaRequadre.getFilaID());
filaRequadrePanel.setWidth(FilaPanel.WIDTH_FILA +
"px");
VariablePanel lastVariable = null;
for(int idVariable=0;
idVariable<filaRequadre.getElements().size(); idVariable++) {
Component componentRequadre =
filaRequadre.getElements().get(idVariable);
if(componentRequadre instanceof Variable) {
VariablePanel areaVariable = new
VariablePanel("" + ((Variable)componentRequadre).getId(), false);
areaVariable.setInRequadre(true);
areaVariable.setRequadre(requadre);
areaVariable.setSizeInRequadre();
areaVariable.setFila(filaPanel);
areaVariable.setFilaRequadre(filaRequadrePanel);
areaVariable.setHeight(FilaPanel.HEIGHT_FILA);
areaVariable.setEventBus(eventBus);
if(idVariable==0) {
requadre.onVariableDinsRequadre(areaVariable, requadre, filaRequadrePanel);
} else {
requadre.onAfegirElementRequadre(areaVariable, lastVariable,
filaRequadrePanel, AreesPanel.EAST, requadre);
}
lastVariable = areaVariable;
}
}
}
} else if(component instanceof Variable) {
VariablePanel arees = new VariablePanel("" +
((Variable)component).getId(), false);
arees.setFila(filaPanel);
arees.setEventBus(eventBus);
filaPanel.addElement(idElement, arees);
arees.setHeight(FilaPanel.HEIGHT_FILA);
}
}
}
}
I think the cause is de *clear* of the object panell that is a FlowPanel.
This method is called in the onDrop event of a object that contains the
FlowPanel panell. So I think the error is because I clear an object on the
event onDrop of the same object. I hope I explain correcty.
This is the exception:
Uncaught exception: java.lang.NullPointerException
at
gwtquery.plugins.draggable.client.events.DragContext.init(DragContext.java:104)
at
gwtquery.plugins.draggable.client.events.DragContext.<init>(DragContext.java:48)
at
gwtquery.plugins.draggable.client.events.AbstractDraggableEvent.<init>(AbstractDraggableEvent.java:41)
at
gwtquery.plugins.draggable.client.events.DragStopEvent.<init>(DragStopEvent.java:37)
at
gwtquery.plugins.draggable.client.Draggable$3.execute(Draggable.java:490)
at
com.google.gwt.core.client.impl.SchedulerImpl$Task$.executeScheduled$(SchedulerImpl.java:50)
at
com.google.gwt.core.client.impl.SchedulerImpl.runScheduledTasks(SchedulerImpl.java:180)
at
com.google.gwt.core.client.impl.SchedulerImpl.flushPostEventPumpCommands(SchedulerImpl.java:347)
at
com.google.gwt.core.client.impl.SchedulerImpl$Flusher.execute(SchedulerImpl.java:78)
at
com.google.gwt.core.client.impl.SchedulerImpl.execute(SchedulerImpl.java:138)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103)
at
com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71)
at
com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:172)
at
com.google.gwt.dev.shell.BrowserChannelServer.reactToMessagesWhileWaitingForReturn(BrowserChannelServer.java:338)
at
com.google.gwt.dev.shell.BrowserChannelServer.invokeJavascript(BrowserChannelServer.java:219)
at
com.google.gwt.dev.shell.ModuleSpaceOOPHM.doInvoke(ModuleSpaceOOPHM.java:136)
at
com.google.gwt.dev.shell.ModuleSpace.invokeNative(ModuleSpace.java:571)
at
com.google.gwt.dev.shell.ModuleSpace.invokeNativeObject(ModuleSpace.java:279)
at
com.google.gwt.dev.shell.JavaScriptHost.invokeNativeObject(JavaScriptHost.java:91)
at com.google.gwt.core.client.impl.Impl.apply(Impl.java)
at com.google.gwt.core.client.impl.Impl.entry0(Impl.java:242)
at sun.reflect.GeneratedMethodAccessor44.invoke(Unknown Source)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.google.gwt.dev.shell.MethodAdaptor.invoke(MethodAdaptor.java:103)
at
com.google.gwt.dev.shell.MethodDispatch.invoke(MethodDispatch.java:71)
at
com.google.gwt.dev.shell.OophmSessionHandler.invoke(OophmSessionHandler.java:172)
at
com.google.gwt.dev.shell.BrowserChannelServer.reactToMessages(BrowserChannelServer.java:293)
at
com.google.gwt.dev.shell.BrowserChannelServer.processConnection(BrowserChannelServer.java:547)
at
com.google.gwt.dev.shell.BrowserChannelServer.run(BrowserChannelServer.java:364)
at java.lang.Thread.run(Thread.java:724)
Thanks in advanced,
David Martínez
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