Java Region.setPrefSize方法代码示例

import javafx.scene.layout.Region; //导入方法依赖的package包/类
@Override
public void start(Stage primaryStage) throws MalformedURLException {
    Region zoomTarget = createContent();
    zoomTarget.setPrefSize(1000, 1000);
    zoomTarget.setOnDragDetected(evt -> {
        Node target = (Node) evt.getTarget();
        while (target != zoomTarget && target != null) {
            target = target.getParent();
        }
        if (target != null) {
            target.startFullDrag();
        }
    });

    Group group = new Group(zoomTarget);

    // stackpane for centering the content, in case the ScrollPane viewport
    // is larget than zoomTarget
    StackPane content = new StackPane(group);
    group.layoutBoundsProperty().addListener((observable, oldBounds, newBounds) -> {
        // keep it at least as large as the content
        content.setMinWidth(newBounds.getWidth());
        content.setMinHeight(newBounds.getHeight());
    });

    ScrollPane scrollPane = new ScrollPane(content);
    scrollPane.setPannable(true);
    scrollPane.viewportBoundsProperty().addListener((observable, oldBounds, newBounds) -> {
        // use vieport size, if not too small for zoomTarget
        content.setPrefSize(newBounds.getWidth(), newBounds.getHeight());
    });

    content.setOnScroll(evt -> {
        if (evt.isControlDown()) {
            evt.consume();

            final double zoomFactor = evt.getDeltaY() > 0 ? 1.2 : 1 / 1.2;

            Bounds groupBounds = group.getLayoutBounds();
            final Bounds viewportBounds = scrollPane.getViewportBounds();

            // calculate pixel offsets from [0, 1] range
            double valX = scrollPane.getHvalue() * (groupBounds.getWidth() - viewportBounds.getWidth());
            double valY = scrollPane.getVvalue() * (groupBounds.getHeight() - viewportBounds.getHeight());

            // convert content coordinates to zoomTarget coordinates
            Point2D posInZoomTarget = zoomTarget.parentToLocal(group.parentToLocal(new Point2D(evt.getX(), evt.getY())));

            // calculate adjustment of scroll position (pixels)
            Point2D adjustment = zoomTarget.getLocalToParentTransform().deltaTransform(posInZoomTarget.multiply(zoomFactor - 1));

            // do the resizing
            zoomTarget.setScaleX(zoomFactor * zoomTarget.getScaleX());
            zoomTarget.setScaleY(zoomFactor * zoomTarget.getScaleY());

            // refresh ScrollPane scroll positions & content bounds
            scrollPane.layout();

            // convert back to [0, 1] range
            // (too large/small values are automatically corrected by ScrollPane)
            groupBounds = group.getLayoutBounds();
            scrollPane.setHvalue((valX + adjustment.getX()) / (groupBounds.getWidth() - viewportBounds.getWidth()));
            scrollPane.setVvalue((valY + adjustment.getY()) / (groupBounds.getHeight() - viewportBounds.getHeight()));
        }
    });

    StackPane left = new StackPane(new Label("Left Menu"));
    SplitPane root = new SplitPane(left, scrollPane);

    Scene scene = new Scene(root, 800, 600);

    primaryStage.setScene(scene);
    primaryStage.show();
}
 

import javafx.scene.layout.Region; //导入方法依赖的package包/类
private void populateMenu(Map<DocumentType, List<SearchResult>> results) {
    contextMenu.getItems().clear();
    for (Map.Entry<DocumentType, List<SearchResult>> entry : results.entrySet()) {
        boolean first = true;
        for(SearchResult result: entry.getValue()) {
            final SearchResult sr = result;
            final HBox hBox = new HBox();
            hBox.setFillHeight(true);
            Label itemLabel = new Label(result.getName());
            itemLabel.getStyleClass().add("item-label");
            if (first) {
                first = false;
                Label groupLabel = new Label(result.getDocumentType().getPluralDisplayName());
                groupLabel.getStyleClass().add("group-label");
                groupLabel.setAlignment(Pos.CENTER_RIGHT);
                groupLabel.setMinWidth(USE_PREF_SIZE);
                groupLabel.setPrefWidth(70);
                hBox.getChildren().addAll(groupLabel,itemLabel);
            } else {
                Region spacer = new Region();
                spacer.setMinWidth(USE_PREF_SIZE);
                spacer.setPrefWidth(70);
                hBox.getChildren().addAll(spacer,itemLabel);
            }
            // create a special node for hiding/showing popup content
            final Region popRegion = new Region();
            popRegion.getStyleClass().add("search-menu-item-popup-region");
            popRegion.setPrefSize(10, 10);
            hBox.getChildren().add(popRegion);
            final String name = (result.getDocumentType() == DocumentType.SAMPLE) ? result.getName() :
                    result.getPackageName()+
                            ((result.getClassName() != null) ? "."+result.getClassName() : "") +
                            ((result.getName() != null) ? "."+result.getName() : "");
            final String shortDescription = (result.getShortDescription().length() == 160) ? result.getShortDescription() +"..." : result.getShortDescription();
            popRegion.opacityProperty().addListener(new ChangeListener<Number>() {
                @Override public void changed(ObservableValue<? extends Number> observable, Number oldValue, Number newValue) {
                    Platform.runLater( new Runnable() { // TODO runLater used here as a workaround for RT-14396
                        @Override public void run() {
                            if (popRegion.getOpacity() == 1) {
                                infoName.setText(name);
                                infoDescription.setText(shortDescription);
                                Point2D hBoxPos = hBox.localToScene(0, 0);
                                extraInfoPopup.show(getScene().getWindow(),
                                    hBoxPos.getX() + contextMenu.getScene().getX() + contextMenu.getX() - infoBox.getPrefWidth() - 10,
                                    hBoxPos.getY() + contextMenu.getScene().getY() + contextMenu.getY() - 27
                                );
                            }
                        }
                    });
                }
            });
            // create menu item
            CustomMenuItem menuItem = new CustomMenuItem(hBox, true);
            menuItem.getStyleClass().add("search-menu-item");
            contextMenu.getItems().add(menuItem);
            // handle item selection
            menuItem.setOnAction(new EventHandler<ActionEvent>() {
                @Override public void handle(ActionEvent actionEvent) {
                    ///System.out.println("SearchBox.handle menuItem.setOnAction");
                    Ensemble2.getEnsemble2().goToPage(sr.getEnsemblePath(),true);
                }
            });
        }
    }
}
 

import javafx.scene.layout.Region; //导入方法依赖的package包/类
private void initGraphics() {
    main = new Region();
    main.getStyleClass().setAll("main");

    frame = new Region();
    frame.getStyleClass().setAll("frame");

    sectionsCanvas = new Canvas(width, barHeight);
    sections = sectionsCanvas.getGraphicsContext2D();

    currentValuePointer = new Region();
    currentValuePointer.getStyleClass().setAll("normal-current-value-pointer");
    currentValuePointer.setPrefSize(50, 20);
    currentValuePointer.setCache(true);
    currentValuePointer.setCacheHint(CacheHint.SPEED);

    currentValueText = new Text(Double.toString(getSkinnable().getCurrentValue()));
    currentValueText.getStyleClass().setAll("current-value-text");
    currentValueText.setCache(true);
    currentValueText.setCacheHint(CacheHint.SPEED);

    currentValuePointerGroup = new Group(currentValuePointer, currentValueText);
    currentValuePointerGroup.setCache(true);
    currentValuePointerGroup.setCacheHint(CacheHint.SPEED);

    titleText = new Text(getSkinnable().getTitle());
    titleText.getStyleClass().setAll("title");

    unitText = new Text(getSkinnable().getUnit());
    unitText.getStyleClass().setAll("unit");

    pane = new Pane();
    pane.getChildren().setAll(main,
            frame,
            sectionsCanvas,
            unitText,
            titleText,
            currentValuePointerGroup);

    getChildren().setAll(pane);

    resize();
}