我想在VBox中拖动TitledPane。我在VBox中有n个Titlepane。我想在拖动时改变它们的顺序。我尝试了一些MouseEvents和DragEvents。但它不适合我。
但我需要将Titledpane移动到哪个地方的索引。基于此我需要在后端做一些事情。请帮我。
由于
答案 0 :(得分:5)
这对我有用......
private static final String TAB_DRAG_KEY = "titledpane";
private ObjectProperty<TitledPane> draggingTab;
@Override
public void start(Stage primaryStage) throws Exception {
draggingTab = new SimpleObjectProperty<TitledPane>();
VBox vbox=new VBox();
for(int i=0;i<4;i++) {
final TitledPane pane=new TitledPane();
pane.setText("pane"+(i+1));
vbox.getChildren().add(pane);
pane.setOnDragOver(new EventHandler<DragEvent>() {
@Override
public void handle(DragEvent event) {
final Dragboard dragboard = event.getDragboard();
if (dragboard.hasString()
&& TAB_DRAG_KEY.equals(dragboard.getString())
&& draggingTab.get() != null) {
event.acceptTransferModes(TransferMode.MOVE);
event.consume();
}
}
});
pane.setOnDragDropped(new EventHandler<DragEvent>() {
public void handle(final DragEvent event) {
Dragboard db = event.getDragboard();
boolean success = false;
if (db.hasString()) {
Pane parent = (Pane) pane.getParent();
Object source = event.getGestureSource();
int sourceIndex = parent.getChildren().indexOf(source);
int targetIndex = parent.getChildren().indexOf(pane);
List<Node> nodes = new ArrayList<Node>(parent.getChildren());
if (sourceIndex < targetIndex) {
Collections.rotate(
nodes.subList(sourceIndex, targetIndex + 1), -1);
} else {
Collections.rotate(
nodes.subList(targetIndex, sourceIndex + 1), 1);
}
parent.getChildren().clear();
parent.getChildren().addAll(nodes);
success = true;
}
event.setDropCompleted(success);
event.consume();
}
});
pane.setOnDragDetected(new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent event) {
Dragboard dragboard = pane.startDragAndDrop(TransferMode.MOVE);
ClipboardContent clipboardContent = new ClipboardContent();
clipboardContent.putString(TAB_DRAG_KEY);
dragboard.setContent(clipboardContent);
draggingTab.set(pane);
event.consume();
}
});
}
TitledPane pane=new TitledPane("MAIN",vbox);
primaryStage.setScene(new Scene(pane, 890, 570));
primaryStage.show();
}