jmonkeyengine/sdk/jme3-navmesh-gen/src/com/jme3/gde/nmgen/NavMeshAction.java

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package com.jme3.gde.nmgen;

import com.jme3.asset.DesktopAssetManager;
import com.jme3.gde.core.assets.BinaryModelDataObject;
import com.jme3.gde.core.assets.ProjectAssetManager;
import com.jme3.scene.Spatial;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import org.netbeans.api.progress.ProgressHandle;
import org.netbeans.api.progress.ProgressHandleFactory;
import org.openide.DialogDisplayer;
import org.openide.NotifyDescriptor;
import org.openide.NotifyDescriptor.Confirmation;

/**
 *
 * @author sploreg
 */
public class NavMeshAction implements ActionListener {

    private final BinaryModelDataObject context;

    public NavMeshAction(BinaryModelDataObject context) {
        this.context = context;
    }

    public void actionPerformed(ActionEvent ev) {
        final ProjectAssetManager manager = context.getLookup().lookup(ProjectAssetManager.class);
        if (manager == null) {
            return;
        }
        Runnable call = new Runnable() {

            public void run() {
                ProgressHandle progressHandle = ProgressHandleFactory.createHandle("Opening in Nav Mesh Editor");
                progressHandle.start();

                
                final Spatial asset = context.loadAsset();

                if(asset!=null){
                    java.awt.EventQueue.invokeLater(new Runnable() {

                        public void run() {
                            ((DesktopAssetManager)manager.getManager()).clearCache();
                            NavMeshTopComponent composer = NavMeshTopComponent.findInstance();
                            composer.openScene(asset, context, manager);
                        }
                    });
                }else {
                    Confirmation msg = new NotifyDescriptor.Confirmation(
                            "Error opening " + context.getPrimaryFile().getNameExt(),
                            NotifyDescriptor.OK_CANCEL_OPTION,
                            NotifyDescriptor.ERROR_MESSAGE);
                    DialogDisplayer.getDefault().notify(msg);
                }
                progressHandle.finish();
            }
        };
        new Thread(call).start();
    }
    
}