Desing Nifty GUI Xml does'nt work

Troubleshooting gui
1

Hi.
I’m beginning in Nifty, so when i try to preview the code, i got a NullPointerException, here is the log:

[java]java.lang.NullPointerException
at jada.ngeditor.controller.GUIEditor.saveGui(GUIEditor.java:178)
at com.jme3.gde.gui.NiftyGuiVisualElement.componentHidden(NiftyGuiVisualElement.java:271)
at org.netbeans.core.multiview.MultiViewPeer.hideElement(MultiViewPeer.java:340)
at org.netbeans.core.multiview.MultiViewPeer$SelectionListener.selectionChanged(MultiViewPeer.java:749)
at org.netbeans.core.multiview.MultiViewModel.fireSelectionChanged(MultiViewModel.java:246)
at org.netbeans.core.multiview.MultiViewModel.setActiveDescription(MultiViewModel.java:118)
at org.netbeans.core.multiview.MultiViewModel$BtnGroup.setSelected(MultiViewModel.java:296)
at javax.swing.JToggleButton$ToggleButtonModel.setSelected(JToggleButton.java:254)
at javax.swing.ButtonGroup.setSelected(ButtonGroup.java:164)
at org.netbeans.core.multiview.MultiViewModel$BtnGroup.setSelected(MultiViewModel.java:292)
at org.netbeans.core.multiview.TabsComponent$ButtonMouseListener.mousePressed(TabsComponent.java:424)
at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:280)
at java.awt.AWTEventMulticaster.mousePressed(AWTEventMulticaster.java:279)
at java.awt.Component.processMouseEvent(Component.java:6502)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3320)
at java.awt.Component.processEvent(Component.java:6270)
at java.awt.Container.processEvent(Container.java:2229)
at java.awt.Component.dispatchEventImpl(Component.java:4861)
at java.awt.Container.dispatchEventImpl(Container.java:2287)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4489)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
at java.awt.Container.dispatchEventImpl(Container.java:2273)
at java.awt.Window.dispatchEventImpl(Window.java:2719)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:735)
at java.awt.EventQueue.access$200(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:694)
at java.awt.EventQueue$3.run(EventQueue.java:692)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
at java.awt.EventQueue$4.run(EventQueue.java:708)
at java.awt.EventQueue$4.run(EventQueue.java:706)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:705)
at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
[/java]

And this is what appears:

And my XML code:

[java]<?xml version=“1.0” encoding=“UTF-8”?>
<nifty xmlns=“http://nifty-gui.lessvoid.com/nifty-gui” xmlns:xsi=“XML Schema” xsi:schemaLocation=“https://raw.githubusercontent.com/void256/nifty-gui/1.4/nifty-core/src/main/resources/nifty.xsd”>
<!-- +++++++++++++++++++++++++++++++++++++++ -->
<!-- start screen -->
<!-- +++++++++++++++++++++++++++++++++++++++ -->
<screen id=“home” controller=“mygame.Main”>
<layer id=“background” backgroundColor="#000F" childLayout=“absolute”>
</layer>
<layer id=“foreground” childLayout=“vertical” align=“center”>
<panel id=“top” width=“75%” height=“25%”>

        &lt;/panel&gt;
        &lt;panel id="mid" width="75%" height="50%"&gt;
            
        &lt;/panel&gt;
        &lt;panel id="botton" childLayout="horizontal" width="75%" height="25%"&gt;
            &lt;panel id="botton-left"&gt;
            &lt;/panel&gt;
            &lt;panel id="botton-right"&gt;
            &lt;/panel&gt;
        &lt;/panel&gt;
    &lt;/layer&gt;
&lt;/screen&gt;

</nifty>[/java]

Also, when I try to go back into the editor, the screen freezes on the design.

Can someone help me out?
I’m using JME 3.0
Thanks.

2

Sorry about “Desing”… Design
And the img is here:
Imgur

3

Is your nifty xml in the assets folder?

4

Yes, in Interface.

5

Hello, it seems that your file is corrupted in some ways… I don’t know how sorry :frowning: . Try to create a new file and copy and paste your previous xml content. In the next version will be a better control I apologize for the inconvenience!

6

Found the problem! In the next version will be solved by now just add this elements in the root of the xml :
[xml]
<useControls filename=“nifty-default-controls.xml”/>
<useStyles filename=“nifty-default-styles.xml”/>
[/xml]

7

Thank you, it works! =D