我在NetBeans 8.0平台应用程序中创建了一个TopComponent。我想在它上面显示画布，但是当代码被调用时，会抛出一个worldwind组件和异常:
" java.lang.IllegalStateException异常发生。点击显示详细信息或查看位于您的C:UsersabradfordDesktopNetBeans项目 MTAET MTAET 制造 testuserdir var 日志文件夹。"
. lang。不能找到TopComponent withpreferredID EarthTopComponent，详见IDE日志
对于这个TopComponent依赖于WorldWind.jar文件和Jogl文件。而WorldWind.jar文件只依赖于Jogl文件。我想问的是，是否有人能解释一下为什么worldwind组件不能与TopComponent一起工作。如果有人已经有一段有效的代码来连接它或解决它，那也很棒。我已经有一段时间没有编写Java程序了，我可能一开始对所有这些都有点强烈，所以如果答案是显而易见的，请原谅我。
这是我使用的代码:这是TopComponent
import org.openide.awt.ActionID;
import org.openide.awt.ActionReference;
import org.openide.util.NbBundle;
import org.openide.windows.TopComponent;
@TopComponent.Description(
preferredID = "EarthTopComponent",
persistenceType = TopComponent.PERSISTENCE_ALWAYS
)
@TopComponent.Registration(
mode = "editor",
openAtStartup = true
)
@ActionID(
category = "Window",
id = "EarthTopComponent"
)
@ActionReference(
path = "Menu/Window"
)
@TopComponent.OpenActionRegistration(
displayName = "Earth",
preferredID = "EarthTopComponent"
)
@NbBundle.Messages({"CTL_EarthViewer=Earth View",
"HINT_EarthViewer=This is the Earth View"
})
public class EarthTopComponent extends TopComponent {
public EarthTopComponent() {
setName(Bundle.CTL_EarthViewer());
setToolTipText(Bundle.HINT_EarthViewer());
GUIWorldWind gui = new GUIWorldWind();
add(gui.getFrame());
}
}
_________________________________________________
V This is the Canvas Class V
package Earth;
//Basic Java Imports
import javax.swing.*;
import java.awt.*;
//import java.util.ArrayList;
//imports for layers
import gov.nasa.worldwind.layers.*;
import gov.nasa.worldwind.layers.Earth.*;
//Imports for Geometry
//import gov.nasa.worldwind.render.*;
//import gov.nasa.worldwind.geom.Position;
//import gov.nasa.worldwind.layers.RenderableLayer;
//imports for world wind libraries
import gov.nasa.worldwind.*;
import gov.nasa.worldwind.awt.WorldWindowGLCanvas;
import gov.nasa.worldwind.avlist.AVKey;
public class CanvasPanel extends JPanel
{
//World Wind GUI components
private LayerList layerlist; //Holds all Layers
private WorldWindowGLCanvas canvas; //Displays Model
private Model model; //world and layers
//Swing and AWT GUI components
JPanel mainPanel; //Main focus of the GUI
/*
* Constructs the panel when the class is called
*/
public CanvasPanel()
{
//canvas and layerlist variables
canvas = new WorldWindowGLCanvas();
loadPanel(); //loads the panel
loadLayers(); //loads all default layers
//sets the canvas to fill the panelspace
canvas.setPreferredSize(new Dimension((mainPanel.getWidth() - 100), (mainPanel.getHeight() - 100)));
//Creates a new model to display in the canvas
model = (Model) WorldWind.createConfigurationComponent(AVKey.MODEL_CLASS_NAME);
//adds all relevant layers to the model
model.setLayers(layerlist);
//adds the model to the canvas
canvas.setModel(model);
}
/**
* Sends the Panel when requested
*
* @return mainPanel, as JPanel object
*/
public JPanel getPanel()
{
return mainPanel;
}
/**
* called in the constructor, this method constructs the Swing and AWT
* components of the Panel.
*/
private void loadPanel()
{
//Creates and sets the dimensions of the Panel
mainPanel = new JPanel();
mainPanel.setSize(700, 700);
mainPanel.setBackground(Color.DARK_GRAY);
mainPanel.setBorder(
BorderFactory.createMatteBorder(2, 2, 2, 2, new Color(0, 0, 0))
);
//Adds the canvas to the panel
mainPanel.add(canvas, BorderLayout.CENTER);
}
/**
* Adds relevant layers to layerlist to be added to the model
*/
private void loadLayers()
{
//creates a new layerlist array
layerlist = new LayerList();
//preloading all of the default layers
layerlist.add(new StarsLayer()); //Stars
layerlist.add(new SkyGradientLayer()); //Atmosphere
layerlist.add(new BMNGWMSLayer()); //BlueMarble Globe
layerlist.add(new CountryBoundariesLayer());//Political Boundaries
layerlist.add(new MSVirtualEarthLayer()); //City View
layerlist.add(new NASAWFSPlaceNameLayer()); //Names of Places
layerlist.add(new LatLonGraticuleLayer()); //Lat and Long Grid
}
}
V这把两个放在一起V
protected void displayGUI(final String title){//创建框架对象guiFrame = new JFrame(title);
//sets exit button properties
guiFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
//creates gui components
menuBar = new FileMenuBar();
sideBar = new OptionSideBar();
canvasPanel = new CanvasPanel();
//adds objects to the form
guiFrame.setJMenuBar(menuBar.getMenu());
guiFrame.add(sideBar.getSideBar(), BorderLayout.WEST);
guiFrame.add(canvasPanel.getPanel(), BorderLayout.CENTER);
//loads the form
guiFrame.pack();
//determines the size of the form
Dimension scrnSize = Toolkit.getDefaultToolkit().getScreenSize();
int scrnWidth = guiFrame.getSize().width;
int scrnHeight = guiFrame.getSize().height;
int x = (scrnSize.width - scrnWidth) / 2;
int y = (scrnSize.height - scrnHeight) / 2;
//places form on the screen
guiFrame.setLocation(x,y);
//sets for to visible
guiFrame.setVisible(true);
}
我在尝试一些预生成的代码时偶然发现了答案。下面是一个在NetBeans 8.0平台的顶层组件上使用WorldWindGLCanvas的工作示例。我希望这个答案能帮助到别人，因为我花了很长时间才偶然发现了这个问题。
下面是Topcomponent类。
package Earth;
import gov.nasa.worldwind.*;
import gov.nasa.worldwind.avlist.AVKey;
import gov.nasa.worldwind.awt.WorldWindowGLCanvas;
import java.awt.BorderLayout;
import org.openide.awt.ActionID;
import org.openide.awt.ActionReference;
import org.openide.windows.TopComponent;
import org.openide.util.NbBundle.Messages;
import gov.nasa.worldwind.layers.*;
import gov.nasa.worldwind.layers.Earth.*;
import java.awt.Dimension;
import javax.swing.JInternalFrame;
@TopComponent.Description(
preferredID = "EarthTopComponent",
//iconBase="SET/PATH/TO/ICON/HERE",
persistenceType = TopComponent.PERSISTENCE_ALWAYS
)
@TopComponent.Registration(mode = "explorer", openAtStartup = false)
@ActionID(category = "Window", id = "Earth.EarthTopComponent")
@ActionReference(path = "Menu/Window" /*, position = 333 */)
@TopComponent.OpenActionRegistration(
displayName = "#CTL_EarthAction",
preferredID = "EarthTopComponent"
)
@Messages({
"CTL_EarthAction=Earth",
"CTL_EarthTopComponent=Earth Window",
"HINT_EarthTopComponent=This is the Earth window"
})
public final class EarthTopComponent extends TopComponent {
public EarthTopComponent() {
initcomp();
setName(Bundle.CTL_EarthTopComponent());
setToolTipText(Bundle.HINT_EarthTopComponent());
}
private LayerList layerlist; //Holds all Layers
private WorldWindowGLCanvas canvas; //Displays Model
private Model model; //world and layers
private OptionSideBar sidebar;
private JInternalFrame layersPanel;
private void initcomp()
{
canvas = new WorldWindowGLCanvas();
sidebar = new OptionSideBar();
//Creates a new model to display in the canvas
model = (Model) WorldWind.createConfigurationComponent(AVKey.MODEL_CLASS_NAME);
loadLayers();
//adds all relevant layers to the model
model.setLayers(layerlist);
//adds the model to the canvas
canvas.setModel(model);
setLayout(new BorderLayout());
layersPanel = new JInternalFrame("Layers Panel");
layersPanel.setIconifiable(true);
layersPanel.setSize(new Dimension(150,250 ));
layersPanel.add(sidebar.getSideBar());
layersPanel.setVisible(true);
setLayout(new BorderLayout());
canvas.setSize(new Dimension(500,550));
canvas.setVisible(true);
add(layersPanel,BorderLayout.CENTER);
add(canvas,BorderLayout.CENTER);
}
/**
* Adds relevant layers to layerlist to be added to the model
*/
private void loadLayers()
{
//creates a new layerlist array
layerlist = new LayerList();
//preloading all of the default layers
layerlist.add(new StarsLayer()); //Stars
layerlist.add(new SkyGradientLayer()); //Atmosphere
layerlist.add(new BMNGWMSLayer()); //BlueMarble Globe
layerlist.add(new CountryBoundariesLayer());//Political Boundaries
layerlist.add(new MSVirtualEarthLayer()); //City View
layerlist.add(new NASAWFSPlaceNameLayer()); //Names of Places
layerlist.add(new LatLonGraticuleLayer()); //Lat and Long Grid
}
}
这个问题"cannot find TopComponent with preferredID…"经常发生在加载TopComponent之前。
一个简单的例子:你试图在构造函数中加载失败的东西(在任何深度)。
这条不明确的信息不止一次让我生气!
(此处也回答)