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当我试图拖动TreeView的节点出现此错误未知错误0x80DE0001
ÊRROR：8 0代0 0 0 1用C allbackŤÒ的J ava（Java的id V IEW NotI位 FY d。 rag D rop，grf K ey S tate，pt，pdw E ffect） COMER rror：8 0 de 0 0 0 1 U nknownerror 0 x 8 0 DE 0 0 0 1 E rror：8 0 de 0 0 0 1 in ：（DdD rag D rop（pcd，ID rop S ource P t r（new G lass D rop S ource（obj），false），get DROPEFFECT（ supported A ctions），& Dopop E ffect） C 0 M E R RØR：8 0 dě0 0 0 1 U n所K N O w制备否E R RØ，R 0×8 0 dě0 0 0 1
测试代码：
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import java.util.logging.Level;
import java.util.logging.Logger;
import javafx.application.Application;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.TreeCell;
import javafx.scene.control.TreeItem;
import javafx.scene.control.TreeItem.TreeModificationEvent;
import javafx.scene.control.TreeView;
import javafx.scene.input.ClipboardContent;
import javafx.scene.input.DataFormat;
import javafx.scene.input.DragEvent;
import javafx.scene.input.Dragboard;
import javafx.scene.input.MouseEvent;
import javafx.scene.input.TransferMode;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;
import javafx.util.Callback;
public class MainApp extends Application
{
private EventHandler<TreeModificationEvent<DynamicTreeNodeModel>> branchExpandedEventHandler;
/**
* @param args the command line arguments
*/
public static void main(String[] args)
{
Application.launch(MainApp.class, args);
}
@Override
public void start(Stage primaryStage)
{
primaryStage.setTitle("Example Dynamic Tree");
primaryStage.setResizable(true);
final VBox box = new VBox();
box.setFillWidth(false);
Scene scene = new Scene(box);
primaryStage.setScene(scene);
box.getChildren().add(this.getExampleTree());
primaryStage.show();
}
private TreeView<DynamicTreeNodeModel> getExampleTree()
{
DynamicTreeNodeModel rootNode = new RandomDynamicTreeNodeModel(null, "Root Node");
TreeView<DynamicTreeNodeModel> treeView = new TreeView<>();
treeView.setCellFactory(new Callback<TreeView<DynamicTreeNodeModel>, TreeCell<DynamicTreeNodeModel>>()
{
@Override
public TreeCell call(TreeView<DynamicTreeNodeModel> param)
{
return new DnDCell(param);
}
});
treeView.setPrefSize(1000, 750);
TreeItem rootItem = new TreeItem(rootNode);
branchExpandedEventHandler = new EventHandler<TreeModificationEvent<DynamicTreeNodeModel>>()
{
@Override
public void handle(TreeModificationEvent<DynamicTreeNodeModel> event)
{
// System.out.println("handling event " + event);
TreeItem<DynamicTreeNodeModel> item = event.getTreeItem();
populateTreeItem(item);
}
};
rootItem.addEventHandler(TreeItem.branchExpandedEvent(), branchExpandedEventHandler);
treeView.setShowRoot(true);
treeView.setRoot(rootItem);
populateTreeItem(rootItem);
rootItem.setExpanded(true);
// treeView.setCellFactory(new LearningTreeCellFactory());
return treeView;
}
private void populateTreeItem(TreeItem<DynamicTreeNodeModel> item)
{
DynamicTreeNodeModel node = item.getValue();
boolean isPopulated = node.isPopulated();
boolean areGrandChildrenPopulated = node.areChildenPopulated();
node.populateToDepth(2);
if (!isPopulated)
{
for (DynamicTreeNodeModel childNode : node.getChildren())
{
TreeItem childItem = new TreeItem(childNode);
childItem.addEventHandler(TreeItem.branchExpandedEvent(), branchExpandedEventHandler);
item.getChildren().add(childItem);
}
}
if (!areGrandChildrenPopulated)
{
int i = 0;
int size = node.getChildren().size();
for (TreeItem childItem : item.getChildren())
{
// get cooresponding node in the model
if (i < size)
{
DynamicTreeNodeModel childNode = node.getChildren().get(i);
i++;
for (DynamicTreeNodeModel grandChildNode : childNode.getChildren())
{
TreeItem grandChildItem = new TreeItem(grandChildNode);
grandChildItem.addEventHandler(TreeItem.branchExpandedEvent(), branchExpandedEventHandler);
childItem.getChildren().add(grandChildItem);
}
}
}
}
}
private static interface DynamicTreeNodeModel
{
public String getName();
public void setName(String name);
public boolean isPopulated();
public boolean areChildenPopulated();
public List<DynamicTreeNodeModel> getChildren();
public void setChildren(List<DynamicTreeNodeModel> children);
public DynamicTreeNodeModel getParent();
public void setParent(DynamicTreeNodeModel parent);
public void populateToDepth(int depth);
@Override
public String toString();
}
private static class RandomDynamicTreeNodeModel implements DynamicTreeNodeModel
{
private DynamicTreeNodeModel parent;
private String name;
private List<DynamicTreeNodeModel> children = null;
public RandomDynamicTreeNodeModel(DynamicTreeNodeModel parent, String name)
{
this.parent = parent;
this.name = name;
}
@Override
public String getName()
{
return name;
}
@Override
public void setName(String name)
{
this.name = name;
}
@Override
public boolean isPopulated()
{
if (children == null)
{
return false;
}
return true;
}
@Override
public boolean areChildenPopulated()
{
if (!this.isPopulated())
{
return false;
}
for (DynamicTreeNodeModel child : this.children)
{
if (!child.isPopulated())
{
return false;
}
}
return true;
}
@Override
public List<DynamicTreeNodeModel> getChildren()
{
return children;
}
@Override
public void setChildren(List<DynamicTreeNodeModel> children)
{
this.children = children;
}
@Override
public DynamicTreeNodeModel getParent()
{
return parent;
}
@Override
public void setParent(DynamicTreeNodeModel parent)
{
this.parent = parent;
}
private static Random random = new Random();
@Override
public void populateToDepth(int depth)
{
if (depth <= 0)
{
return;
}
if (children == null)
{
int num = random.nextInt(5);
System.out.println("Random number " + num);
children = new ArrayList(num);
for (int i = 0; i < num; i++)
{
// children.add(new RandomDynamicTreeNodeModel(this, "child " + i));
children.add(new RandomDynamicTreeNodeModel(this, "child " + System.currentTimeMillis()));
try
{
Thread.sleep(100);
}
catch (InterruptedException ex)
{
Logger.getLogger(MainApp.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
int childDepth = depth - 1;
for (DynamicTreeNodeModel child : children)
{
child.populateToDepth(childDepth);
}
}
@Override
public String toString()
{
return this.name;
}
}
public class DnDCell extends TreeCell<DynamicTreeNodeModel>
{
private TreeView<DynamicTreeNodeModel> parentTree;
public DnDCell(final TreeView<DynamicTreeNodeModel> parentTree)
{
this.parentTree = parentTree;
// ON SOURCE NODE.
setOnDragDetected(new EventHandler<MouseEvent>()
{
@Override
public void handle(MouseEvent event)
{
System.out.println("Drag detected on " + item);
if (item == null)
{
return;
}
Dragboard dragBoard = startDragAndDrop(TransferMode.MOVE);
ClipboardContent content = new ClipboardContent();
content.put(DataFormat.PLAIN_TEXT, item.toString());
dragBoard.setContent(content);
event.consume();
}
});
setOnDragDone(new EventHandler<DragEvent>()
{
@Override
public void handle(DragEvent dragEvent)
{
System.out.println("Drag done on " + item);
dragEvent.consume();
}
});
// ON TARGET NODE.
// setOnDragEntered(new EventHandler<DragEvent>() {
// @Override
// public void handle(DragEvent dragEvent) {
// System.out.println("Drag entered on " + item);
// dragEvent.consume();
// }
// });
setOnDragOver(new EventHandler<DragEvent>()
{
@Override
public void handle(DragEvent dragEvent)
{
System.out.println("Drag over on " + item);
if (dragEvent.getDragboard().hasString())
{
String valueToMove = dragEvent.getDragboard().getString();
if (!valueToMove.matches(item.getName()))
{
// We accept the transfer!!!!!
dragEvent.acceptTransferModes(TransferMode.MOVE);
}
}
dragEvent.consume();
}
});
// setOnDragExited(new EventHandler<DragEvent>() {
// @Override
// public void handle(DragEvent dragEvent) {
// System.out.println("Drag exited on " + item);
// dragEvent.consume();
// }
// });
setOnDragDropped(new EventHandler<DragEvent>()
{
@Override
public void handle(DragEvent dragEvent)
{
System.out.println("Drag dropped on " + item);
String valueToMove = dragEvent.getDragboard().getString();
TreeItem<DynamicTreeNodeModel> itemToMove = search(parentTree.getRoot(), valueToMove);
TreeItem<DynamicTreeNodeModel> newParent = search(parentTree.getRoot(), item.getName());
// Remove from former parent.
itemToMove.getParent().getChildren().remove(itemToMove);
// Add to new parent.
newParent.getChildren().add(itemToMove);
newParent.setExpanded(true);
dragEvent.consume();
}
});
}
private TreeItem<DynamicTreeNodeModel> search(final TreeItem<DynamicTreeNodeModel> currentNode, final String valueToSearch)
{
TreeItem<DynamicTreeNodeModel> result = null;
if (currentNode.getValue().getName().matches(valueToSearch))
{
result = currentNode;
}
else if (!currentNode.isLeaf())
{
for (TreeItem<DynamicTreeNodeModel> child : currentNode.getChildren())
{
result = search(child, valueToSearch);
if (result != null)
{
break;
}
}
}
return result;
}
private DynamicTreeNodeModel item;
@Override
protected void updateItem(DynamicTreeNodeModel item, boolean empty)
{
super.updateItem(item, empty);
this.item = item;
String text = (item == null) ? null : item.toString();
setText(text);
}
}
}
你能帮我解决这个问题？
我建议创建一个[简单的例子（MCVE）]（HTTP：//而且JavaFX线程上的'Thread.sleep'永远不是一个好主意，如果在大大简化了代码后问题仍然重现，那么创建一个[错误报告在JavaFX问题跟踪器]（https://wiki.openjdk.java.net/display/OpenJFX/Submitting+a+Bug+Report）。 – jewelsea 2014-09-12 20:29:29