One can now select the technique in the shader node editor through a combo box in the tool bar

jme3-materialeditor/src/com/jme3/gde/materialdefinition/EditableMatDefFile.java

@@ -61,12 +61,9 @@ public class EditableMatDefFile {
     private TechniqueBlock currentTechnique;
     private MaterialDef materialDef;
     private ProjectAssetManager assetManager;
-//    MatParamTopComponent matParamComponent;
     private ShaderGenerator glsl100;
-    private ShaderGenerator glsl150;
-    private final String selectedTechnique = "Default";
-    private final static String GLSL100 = "GLSL100";
-    private final static String GLSL150 = "GLSL150";
+    private ShaderGenerator glsl150;    
+    private final static String GLSL100 = "GLSL100";    
     private Lookup lookup;
     private boolean loaded = false;
     private boolean dirty = false;
@@ -137,7 +134,9 @@ public class EditableMatDefFile {
             }
         }
         if (materialDef != null && !matParseError) {
-            currentTechnique = matDefStructure.getTechniques().get(0);
+            if(currentTechnique == null){
+                currentTechnique = matDefStructure.getTechniques().get(0);
+            }
             registerListener(matDefStructure);
 
             obj.getLookupContents().add(matDefStructure);
@@ -170,7 +169,7 @@ public class EditableMatDefFile {
 
     public String getShaderCode(String version, Shader.ShaderType type) {
         try {
-            material.selectTechnique("Default", SceneApplication.getApplication().getRenderManager());
+            material.selectTechnique(currentTechnique.getName(), SceneApplication.getApplication().getRenderManager());
             Shader s;
             if (version.equals(GLSL100)) {
                 glsl100.initialize(material.getActiveTechnique());
@@ -194,6 +193,10 @@ public class EditableMatDefFile {
     public TechniqueBlock getCurrentTechnique() {
         return currentTechnique;
     }
+    
+    public void setCurrentTechnique(TechniqueBlock tech){
+        this.currentTechnique = tech;
+    }
 
     public MatDefBlock getMatDefStructure() {
         return matDefStructure;

jme3-materialeditor/src/com/jme3/gde/materialdefinition/editor/Bundle.properties

@@ -12,3 +12,4 @@ BackdropPanel.bringToFrontButton.toolTipText=Toggle back/front
 NodeToolBar.codeButton.toolTipText=Display code
 NodeToolBar.deleteButton.toolTipText=Delete node
 NodeToolBar.deleteButton.text=
+MatDefEditorToolBar.jLabel1.text=Technique

jme3-materialeditor/src/com/jme3/gde/materialdefinition/editor/Diagram.java

@@ -5,6 +5,7 @@
 package com.jme3.gde.materialdefinition.editor;
 
 import com.jme3.gde.core.assets.ProjectAssetManager;
+import com.jme3.gde.core.scene.SceneApplication;
 import com.jme3.gde.materialdefinition.dialog.AddAttributeDialog;
 import com.jme3.gde.materialdefinition.dialog.AddMaterialParameterDialog;
 import com.jme3.gde.materialdefinition.dialog.AddNodeDialog;

jme3-materialeditor/src/com/jme3/gde/materialdefinition/editor/MatDefEditorToolBar.form

@@ -0,0 +1,66 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+
+<Form version="1.5" maxVersion="1.9" type="org.netbeans.modules.form.forminfo.JPanelFormInfo">
+  <Properties>
+    <Property name="preferredSize" type="java.awt.Dimension" editor="org.netbeans.beaninfo.editors.DimensionEditor">
+      <Dimension value="[474, 25]"/>
+    </Property>
+  </Properties>
+  <AuxValues>
+    <AuxValue name="FormSettings_autoResourcing" type="java.lang.Integer" value="1"/>
+    <AuxValue name="FormSettings_autoSetComponentName" type="java.lang.Boolean" value="false"/>
+    <AuxValue name="FormSettings_generateFQN" type="java.lang.Boolean" value="true"/>
+    <AuxValue name="FormSettings_generateMnemonicsCode" type="java.lang.Boolean" value="true"/>
+    <AuxValue name="FormSettings_i18nAutoMode" type="java.lang.Boolean" value="true"/>
+    <AuxValue name="FormSettings_layoutCodeTarget" type="java.lang.Integer" value="1"/>
+    <AuxValue name="FormSettings_listenerGenerationStyle" type="java.lang.Integer" value="0"/>
+    <AuxValue name="FormSettings_variablesLocal" type="java.lang.Boolean" value="false"/>
+    <AuxValue name="FormSettings_variablesModifier" type="java.lang.Integer" value="2"/>
+  </AuxValues>
+
+  <Layout>
+    <DimensionLayout dim="0">
+      <Group type="103" groupAlignment="0" attributes="0">
+          <Group type="102" alignment="0" attributes="0">
+              <Component id="jLabel1" min="-2" pref="71" max="-2" attributes="0"/>
+              <EmptySpace max="-2" attributes="0"/>
+              <Component id="techniqueComboBox" min="-2" pref="136" max="-2" attributes="0"/>
+              <EmptySpace min="0" pref="337" max="32767" attributes="0"/>
+          </Group>
+      </Group>
+    </DimensionLayout>
+    <DimensionLayout dim="1">
+      <Group type="103" groupAlignment="0" attributes="0">
+          <Group type="103" alignment="0" groupAlignment="3" attributes="0">
+              <Component id="jLabel1" alignment="3" pref="25" max="32767" attributes="0"/>
+              <Component id="techniqueComboBox" alignment="3" min="-2" max="-2" attributes="0"/>
+          </Group>
+      </Group>
+    </DimensionLayout>
+  </Layout>
+  <SubComponents>
+    <Component class="javax.swing.JLabel" name="jLabel1">
+      <Properties>
+        <Property name="horizontalAlignment" type="int" value="11"/>
+        <Property name="text" type="java.lang.String" editor="org.netbeans.modules.i18n.form.FormI18nStringEditor">
+          <ResourceString bundle="com/jme3/gde/materialdefinition/editor/Bundle.properties" key="MatDefEditorToolBar.jLabel1.text" replaceFormat="org.openide.util.NbBundle.getMessage({sourceFileName}.class, &quot;{key}&quot;)"/>
+        </Property>
+      </Properties>
+    </Component>
+    <Component class="javax.swing.JComboBox" name="techniqueComboBox">
+      <Properties>
+        <Property name="model" type="javax.swing.ComboBoxModel" editor="org.netbeans.modules.form.editors2.ComboBoxModelEditor">
+          <StringArray count="4">
+            <StringItem index="0" value="Item 1"/>
+            <StringItem index="1" value="Item 2"/>
+            <StringItem index="2" value="Item 3"/>
+            <StringItem index="3" value="Item 4"/>
+          </StringArray>
+        </Property>
+      </Properties>
+      <Events>
+        <EventHandler event="actionPerformed" listener="java.awt.event.ActionListener" parameters="java.awt.event.ActionEvent" handler="techniqueComboBoxActionPerformed"/>
+      </Events>
+    </Component>
+  </SubComponents>
+</Form>

jme3-materialeditor/src/com/jme3/gde/materialdefinition/editor/MatDefEditorToolBar.java

@@ -0,0 +1,105 @@
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package com.jme3.gde.materialdefinition.editor;
+
+import com.jme3.gde.materialdefinition.fileStructure.TechniqueBlock;
+import java.awt.Component;
+import java.util.List;
+import javax.swing.DefaultComboBoxModel;
+import javax.swing.DefaultListCellRenderer;
+import javax.swing.JLabel;
+import javax.swing.JList;
+import javax.swing.ListCellRenderer;
+
+/**
+ *
+ * @author Nehon
+ */
+public class MatDefEditorToolBar extends javax.swing.JPanel {
+
+    private MatDefEditorlElement parent;
+    private final DefaultComboBoxModel<TechniqueBlock> comboModel = new DefaultComboBoxModel<TechniqueBlock>();   
+    /**
+     * Creates new form MatDefEditorToolBar
+     */
+    public MatDefEditorToolBar() {
+        initComponents();
+        techniqueComboBox.setModel(comboModel);
+        final DefaultListCellRenderer renderer = new DefaultListCellRenderer();
+        techniqueComboBox.setRenderer(new ListCellRenderer<TechniqueBlock>() {
+
+            public Component getListCellRendererComponent(JList list, TechniqueBlock value, int index, boolean isSelected, boolean cellHasFocus) {
+                JLabel c = (JLabel)renderer.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);
+                c.setText(value.getName());
+                return  c;
+            }
+        });
+        
+    }
+
+    public void setParent(MatDefEditorlElement parent) {
+        this.parent = parent;
+    }
+    
+    public void addTechnique(List<TechniqueBlock> tech){
+        for (TechniqueBlock tech1 : tech) {
+            comboModel.addElement(tech1);
+        }
+        
+    }
+    
+    /**
+     * This method is called from within the constructor to initialize the form.
+     * WARNING: Do NOT modify this code. The content of this method is always
+     * regenerated by the Form Editor.
+     */
+    @SuppressWarnings("unchecked")
+    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
+    private void initComponents() {
+
+        jLabel1 = new javax.swing.JLabel();
+        techniqueComboBox = new javax.swing.JComboBox();
+
+        setPreferredSize(new java.awt.Dimension(474, 25));
+
+        jLabel1.setHorizontalAlignment(javax.swing.SwingConstants.TRAILING);
+        org.openide.awt.Mnemonics.setLocalizedText(jLabel1, org.openide.util.NbBundle.getMessage(MatDefEditorToolBar.class, "MatDefEditorToolBar.jLabel1.text")); // NOI18N
+
+        techniqueComboBox.setModel(new javax.swing.DefaultComboBoxModel(new String[] { "Item 1", "Item 2", "Item 3", "Item 4" }));
+        techniqueComboBox.addActionListener(new java.awt.event.ActionListener() {
+            public void actionPerformed(java.awt.event.ActionEvent evt) {
+                techniqueComboBoxActionPerformed(evt);
+            }
+        });
+
+        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this);
+        this.setLayout(layout);
+        layout.setHorizontalGroup(
+            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
+            .addGroup(layout.createSequentialGroup()
+                .addComponent(jLabel1, javax.swing.GroupLayout.PREFERRED_SIZE, 71, javax.swing.GroupLayout.PREFERRED_SIZE)
+                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
+                .addComponent(techniqueComboBox, javax.swing.GroupLayout.PREFERRED_SIZE, 136, javax.swing.GroupLayout.PREFERRED_SIZE)
+                .addGap(0, 337, Short.MAX_VALUE))
+        );
+        layout.setVerticalGroup(
+            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
+            .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
+                .addComponent(jLabel1, javax.swing.GroupLayout.DEFAULT_SIZE, 25, Short.MAX_VALUE)
+                .addComponent(techniqueComboBox, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
+        );
+    }// </editor-fold>//GEN-END:initComponents
+
+    private void techniqueComboBoxActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_techniqueComboBoxActionPerformed
+        parent.switchTechnique((TechniqueBlock)techniqueComboBox.getSelectedItem());
+    }//GEN-LAST:event_techniqueComboBoxActionPerformed
+
+
+    // Variables declaration - do not modify//GEN-BEGIN:variables
+    private javax.swing.JLabel jLabel1;
+    private javax.swing.JComboBox techniqueComboBox;
+    // End of variables declaration//GEN-END:variables
+}

jme3-materialeditor/src/com/jme3/gde/materialdefinition/editor/MatDefEditorlElement.java

@@ -32,6 +32,7 @@
 package com.jme3.gde.materialdefinition.editor;
 
 import com.jme3.gde.core.assets.ProjectAssetManager;
+import com.jme3.gde.core.scene.SceneApplication;
 import com.jme3.gde.materialdefinition.EditableMatDefFile;
 import com.jme3.gde.materialdefinition.MatDefDataObject;
 import com.jme3.gde.materialdefinition.MatDefMetaData;
@@ -44,6 +45,7 @@ import com.jme3.gde.materialdefinition.fileStructure.leaves.MatParamBlock;
 import com.jme3.gde.materialdefinition.fileStructure.leaves.OutputMappingBlock;
 import com.jme3.gde.materialdefinition.fileStructure.leaves.WorldParamBlock;
 import com.jme3.gde.materialdefinition.navigator.MatDefNavigatorPanel;
+import com.jme3.gde.materialdefinition.shadervisual.MatDefShaderElement;
 import com.jme3.gde.materialdefinition.utils.MaterialUtils;
 import com.jme3.material.Material;
 import com.jme3.shader.Shader;
@@ -69,7 +71,6 @@ import javax.swing.Action;
 import javax.swing.JComponent;
 import javax.swing.JLabel;
 import javax.swing.JPanel;
-import javax.swing.JToolBar;
 import org.netbeans.core.spi.multiview.CloseOperationState;
 import org.netbeans.core.spi.multiview.MultiViewElement;
 import org.netbeans.core.spi.multiview.MultiViewElementCallback;
@@ -80,7 +81,6 @@ import org.openide.filesystems.FileObject;
 import org.openide.filesystems.FileUtil;
 import org.openide.nodes.Children;
 import org.openide.nodes.Node;
-import org.openide.text.EditorSupport;
 import org.openide.util.Exceptions;
 import org.openide.util.Lookup;
 import org.openide.util.LookupEvent;
@@ -101,12 +101,13 @@ import org.openide.windows.TopComponent;
 public final class MatDefEditorlElement extends JPanel implements MultiViewElement {
 
     protected MatDefDataObject obj;
-    private JToolBar toolbar = new JToolBar();
+    private final MatDefEditorToolBar toolbar = new MatDefEditorToolBar();
     private transient MultiViewElementCallback callback;
     InstanceContent content;
     Selectable prevNode;
     MatDefMetaData metaData;
 
+    @SuppressWarnings("LeakingThisInConstructor")
     public MatDefEditorlElement(final Lookup lkp) {
         initComponents();
         obj = lkp.lookup(MatDefDataObject.class);
@@ -115,7 +116,9 @@ public final class MatDefEditorlElement extends JPanel implements MultiViewEleme
         final EditableMatDefFile file = obj.getEditableFile();
         shaderEditPanel1.setVisible(false);
         shaderEditPanel1.setParent(this);
-        reload(file, lkp);
+        toolbar.setParent(this);
+        toolbar.addTechnique(lkp.lookup(MatDefBlock.class).getTechniques());
+        reload(file, lkp);        
     }
 
     private void initDiagram(Lookup lkp) throws NumberFormatException {
@@ -127,7 +130,7 @@ public final class MatDefEditorlElement extends JPanel implements MultiViewEleme
 
         ProjectAssetManager manager = obj.getLookup().lookup(ProjectAssetManager.class);
         final MatDefBlock matDef = obj.getLookup().lookup(MatDefBlock.class);
-        TechniqueBlock technique = getTechnique(matDef);
+        TechniqueBlock technique = getTechnique();
 
         diagram1.setCurrentTechniqueName(technique.getName());
 
@@ -219,6 +222,7 @@ public final class MatDefEditorlElement extends JPanel implements MultiViewEleme
         diagram1.revalidate();
         jScrollPane1.addComponentListener(diagram1);
 
+        mat.selectTechnique(obj.getEditableFile().getCurrentTechnique().getName(), SceneApplication.getApplication().getRenderManager());
         diagram1.refreshPreviews(mat);
         final Lookup.Result<Material> resMat = obj.getLookup().lookupResult(Material.class);
         resMat.addLookupListener(new LookupListener() {
@@ -226,6 +230,7 @@ public final class MatDefEditorlElement extends JPanel implements MultiViewEleme
                 Collection<? extends Material> col = (Collection<? extends Material>) resMat.allInstances();
                 if (!col.isEmpty()) {
                     Material material = col.iterator().next();
+                    material.selectTechnique(obj.getEditableFile().getCurrentTechnique().getName(), SceneApplication.getApplication().getRenderManager());
                     diagram1.refreshPreviews(material);
                 }
             }
@@ -247,6 +252,11 @@ public final class MatDefEditorlElement extends JPanel implements MultiViewEleme
         }
     }
 
+    public void switchTechnique(TechniqueBlock tech) {
+        obj.getEditableFile().setCurrentTechnique(tech);        
+        reload(obj.getEditableFile(), obj.getLookup());
+    }
+
     @Override
     public String getName() {
         return "MatDefVisualElement";
@@ -278,6 +288,7 @@ public final class MatDefEditorlElement extends JPanel implements MultiViewEleme
         Collection<? extends Material> col = (Collection<? extends Material>) resMat.allInstances();
         if (!col.isEmpty()) {
             Material material = col.iterator().next();
+            material.selectTechnique(obj.getEditableFile().getCurrentTechnique().getName(), SceneApplication.getApplication().getRenderManager());
             diagram1.refreshPreviews(material);
         }
 
@@ -510,8 +521,7 @@ public final class MatDefEditorlElement extends JPanel implements MultiViewEleme
     }
 
     public void notifyAddNode(ShaderNodeBlock node, ShaderNodeDefinition def) {
-        MatDefBlock matDef = obj.getLookup().lookup(MatDefBlock.class);
-        TechniqueBlock technique = getTechnique(matDef);
+        TechniqueBlock technique = getTechnique();
         if (def.getType() == Shader.ShaderType.Vertex) {
             technique.addVertexShaderNode(node);
         } else if (def.getType() == Shader.ShaderType.Fragment) {
@@ -526,15 +536,14 @@ public final class MatDefEditorlElement extends JPanel implements MultiViewEleme
     }
 
     public void notifyAddWorldParam(String name) {
-        MatDefBlock matDef = obj.getLookup().lookup(MatDefBlock.class);
         WorldParamBlock param = new WorldParamBlock(name);
-        getTechnique(matDef).addWorldParam(param);
+        getTechnique().addWorldParam(param);
     }
 
     public void notifyRemoveNode(NodePanel node) {
         MatDefBlock matDef = obj.getLookup().lookup(MatDefBlock.class);
         if (node.getType() == NodePanel.NodeType.Fragment || node.getType() == NodePanel.NodeType.Vertex) {
-            TechniqueBlock technique = getTechnique(matDef);
+            TechniqueBlock technique = getTechnique();
             for (ShaderNodeBlock shaderNodeBlock : technique.getShaderNodes()) {
                 if (shaderNodeBlock.getName().equals(node.getName())) {
                     technique.removeShaderNode(shaderNodeBlock);
@@ -543,9 +552,9 @@ public final class MatDefEditorlElement extends JPanel implements MultiViewEleme
         } else if (node.getType() == NodePanel.NodeType.MatParam) {
             matDef.removeMatParam(new MatParamBlock("", node.getKey().replaceAll("MatParam.", ""), "", ""));
         } else if (node.getType() == NodePanel.NodeType.WorldParam) {
-            getTechnique(matDef).removeWorldParam(new WorldParamBlock(node.getKey().replaceAll("WorldParam.", "")));
+            getTechnique().removeWorldParam(new WorldParamBlock(node.getKey().replaceAll("WorldParam.", "")));
         } else if (node.getType() == NodePanel.NodeType.Attribute) {
-            getTechnique(matDef).cleanupMappings("Attr", node.getKey().replaceAll("Attr.", ""));
+            getTechnique().cleanupMappings("Attr", node.getKey().replaceAll("Attr.", ""));
         }
     }
 
@@ -634,8 +643,8 @@ public final class MatDefEditorlElement extends JPanel implements MultiViewEleme
 
     }
 
-    private TechniqueBlock getTechnique(MatDefBlock matDef) {
-        TechniqueBlock technique = matDef.getTechniques().get(0);
+    private TechniqueBlock getTechnique() {
+        TechniqueBlock technique = obj.getEditableFile().getCurrentTechnique();
         return technique;
     }
 

jme3-materialeditor/src/com/jme3/gde/materialdefinition/editor/OutBusPanel.java

@@ -4,6 +4,7 @@
  */
 package com.jme3.gde.materialdefinition.editor;
 
+import com.jme3.gde.core.scene.SceneApplication;
 import com.jme3.gde.materialdefinition.fileStructure.leaves.InputMappingBlock;
 import com.jme3.gde.materialdefinition.fileStructure.leaves.OutputMappingBlock;
 import com.jme3.material.Material;
@@ -183,6 +184,7 @@ public class OutBusPanel extends DraggablePanel implements ComponentListener, Se
             preview.showMaterial(mat);
         } else {
             Material vmat = mat.clone();
+            vmat.selectTechnique(mat.getActiveTechnique().getDef().getName(), SceneApplication.getApplication().getRenderManager());
             vmat.getAdditionalRenderState().setWireframe(true);
             preview.showMaterial(vmat);
         }

jme3-materialeditor/src/com/jme3/gde/materialdefinition/navigator/node/ShaderNodeNode.java

@@ -38,26 +38,11 @@ public class ShaderNodeNode extends AbstractMatDefNode implements Selectable, Pr
     ShaderNodeBlock shaderNode;
     ShaderNodeDefinition def;
     String key = "";
+    String techName = "";
 
-    public ShaderNodeNode(final Lookup lookup, final ShaderNodeBlock shaderNode) {
-//        super(Children.create(new ChildFactory<MappingBlock>() {
-//            @Override
-//            protected boolean createKeys(List<MappingBlock> list) {
-//                list.addAll(shaderNode.getInputs());
-//                List<OutputMappingBlock> out = shaderNode.getOutputs();
-//                if (out != null) {
-//                    list.addAll(shaderNode.getOutputs());
-//                }
-//
-//                return true;
-//            }
-//
-//            @Override
-//            protected Node createNodeForKey(MappingBlock key) {
-//                return new MappingNode(lookup, key);
-//            }
-//        }, true), lookup);
+    public ShaderNodeNode(final Lookup lookup, final ShaderNodeBlock shaderNode, final String techName) {
         super(new MappingNodeChildren(lookup, shaderNode), lookup);
+        this.techName = techName;
         this.shaderNode = shaderNode;
         setName(shaderNode.getName());
         key = makeKey();
@@ -138,9 +123,8 @@ public class ShaderNodeNode extends AbstractMatDefNode implements Selectable, Pr
         }
     }
 
-    private String makeKey() {
-        String defName = lookup.lookup(MatDefDataObject.class).getEditableFile().getCurrentTechnique().getName();
-        return defName + "/" + getName();
+    private String makeKey() {        
+        return techName + "/" + getName();
     }
 
     public String getKey() {

jme3-materialeditor/src/com/jme3/gde/materialdefinition/navigator/node/TechniqueNode.java

@@ -56,7 +56,7 @@ public class TechniqueNode extends AbstractMatDefNode implements Selectable, Pro
 
     }
 
-    protected TechniqueBlock getDef() {
+    public TechniqueBlock getDef() {
         return def;
     }
 
@@ -116,7 +116,7 @@ public class TechniqueNode extends AbstractMatDefNode implements Selectable, Pro
 
         @Override
         protected Node[] createNodes(ShaderNodeBlock key) {
-            return new Node[]{new ShaderNodeNode(lookup, key)};
+            return new Node[]{new ShaderNodeNode(lookup, key, def.getName())};
         }
     }
 }

jme3-materialeditor/src/com/jme3/gde/materialdefinition/shadervisual/MatDefShaderElement.java

@@ -31,12 +31,9 @@
  */
 package com.jme3.gde.materialdefinition.shadervisual;
 
-import com.jme3.gde.core.assets.ProjectAssetManager;
-import com.jme3.gde.materialdefinition.EditableMatDefFile;
 import com.jme3.gde.materialdefinition.MatDefDataObject;
 import javax.swing.Action;
 import javax.swing.JComponent;
-import javax.swing.JEditorPane;
 import javax.swing.JPanel;
 import javax.swing.text.EditorKit;
 import org.netbeans.core.spi.multiview.CloseOperationState;
@@ -58,10 +55,11 @@ position = 3000)
 @Messages("LBL_MatDef_SHADER=Shader")
 public final class MatDefShaderElement extends JPanel implements MultiViewElement {
 
-    private MatDefDataObject obj;
-    private ShaderVisualToolBar toolbar = new ShaderVisualToolBar();
+    private final MatDefDataObject obj;
+    private final ShaderVisualToolBar toolbar = new ShaderVisualToolBar();
     private transient MultiViewElementCallback callback;    
 
+    @SuppressWarnings("LeakingThisInConstructor")
     public MatDefShaderElement(Lookup lkp) {
         obj = lkp.lookup(MatDefDataObject.class);
         assert obj != null;

jme3-materialeditor/src/com/jme3/gde/materials/MaterialPreviewRenderer.java

@@ -147,7 +147,7 @@ public class MaterialPreviewRenderer implements SceneListener {
         for (MatParam matParam : mat.getParams()) {
             dummy.setParam(matParam.getName(), matParam.getVarType(), matParam.getValue());
         }
-        
+        dummy.selectTechnique(mat.getActiveTechnique().getDef().getName(), SceneApplication.getApplication().getRenderManager());
         dummy.getAdditionalRenderState().set(mat.getAdditionalRenderState());        
 
         //creating a dummy geom and assigning the dummy material to it