Question

我正在使用this制作一个带有磨砂玻璃效果的iOS主题JavaFX2（Java7）应用程序。问题是此代码使用它对ImageView的影响。我希望它对窗口后面的任何东西使用它的效果，如下：

有没有这样做？我也喜欢你在上面的图像周围看到的小阴影效果。

要清楚，我不想要那个滑块或任何东西，只是能够透过窗户看到边缘周围有轻微阴影的效果。不过，我想使用this iOS7-ish effect代替航空。

这可能很重要：我正在使用Undecorator的修改版本。

Answer 1

frosty

import javafx.animation.*;
import javafx.application.*;
import javafx.beans.property.*;
import javafx.embed.swing.SwingFXUtils;
import javafx.geometry.Insets;
import javafx.scene.*;
import javafx.scene.control.Label;
import javafx.scene.effect.*;
import javafx.scene.Cursor;
import javafx.scene.Node;
import javafx.scene.image.*;
import javafx.scene.layout.StackPane;
import javafx.scene.paint.Color;
import javafx.stage.Stage;
import javafx.stage.StageStyle;
import javafx.util.Duration;

public class FrostyTech extends Application {

    private static final double BLUR_AMOUNT = 10;

    private static final Effect frostEffect =
        new BoxBlur(BLUR_AMOUNT, BLUR_AMOUNT, 3);

    private static final ImageView background = new ImageView();
    private static final StackPane layout = new StackPane();

    @Override public void start(Stage stage) {
        layout.getChildren().setAll(background, createContent());
        layout.setStyle("-fx-background-color: null");

        Scene scene = new Scene(
                layout,
                200, 300,
                Color.TRANSPARENT
        );

        Platform.setImplicitExit(false);

        scene.setOnMouseClicked(event -> {
                if (event.getClickCount() == 2) Platform.exit();
        });
        makeSmoke(stage);

        stage.initStyle(StageStyle.TRANSPARENT);
        stage.setScene(scene);
        stage.show();

        background.setImage(copyBackground(stage));
        background.setEffect(frostEffect);

        makeDraggable(stage, layout);
    }

    // copy a background node to be frozen over.
    private Image copyBackground(Stage stage) {
        final int X = (int) stage.getX();
        final int Y = (int) stage.getY();
        final int W = (int) stage.getWidth();
        final int H = (int) stage.getHeight();

        try {
            java.awt.Robot robot = new java.awt.Robot();
            java.awt.image.BufferedImage image = robot.createScreenCapture(new java.awt.Rectangle(X, Y, W, H));

            return SwingFXUtils.toFXImage(image, null);
        } catch (java.awt.AWTException e) {
            System.out.println("The robot of doom strikes!");
            e.printStackTrace();

            return null;
        }
    }

    // create some content to be displayed on top of the frozen glass panel.
    private Label createContent() {
        Label label = new Label("Create a new question for drop shadow effects.\n\nDrag to move\n\nDouble click to close");
        label.setPadding(new Insets(10));

        label.setStyle("-fx-font-size: 15px; -fx-text-fill: green;");
        label.setMaxWidth(250);
        label.setWrapText(true);

        return label;
    }

    // makes a stage draggable using a given node.
    public void makeDraggable(final Stage stage, final Node byNode) {
        final Delta dragDelta = new Delta();
        byNode.setOnMousePressed(mouseEvent -> {
            // record a delta distance for the drag and drop operation.
            dragDelta.x = stage.getX() - mouseEvent.getScreenX();
            dragDelta.y = stage.getY() - mouseEvent.getScreenY();
            byNode.setCursor(Cursor.MOVE);
        });
        final BooleanProperty inDrag = new SimpleBooleanProperty(false);

        byNode.setOnMouseReleased(mouseEvent -> {
            byNode.setCursor(Cursor.HAND);

            if (inDrag.get()) {
                stage.hide();

                Timeline pause = new Timeline(new KeyFrame(Duration.millis(50), event -> {
                    background.setImage(copyBackground(stage));
                    layout.getChildren().set(
                            0,
                            background
                    );
                    stage.show();
                }));
                pause.play();
            }

            inDrag.set(false);
        });
        byNode.setOnMouseDragged(mouseEvent -> {
            stage.setX(mouseEvent.getScreenX() + dragDelta.x);
            stage.setY(mouseEvent.getScreenY() + dragDelta.y);

            layout.getChildren().set(
                    0,
                    makeSmoke(stage)
            );

            inDrag.set(true);
        });
        byNode.setOnMouseEntered(mouseEvent -> {
            if (!mouseEvent.isPrimaryButtonDown()) {
                byNode.setCursor(Cursor.HAND);
            }
        });
        byNode.setOnMouseExited(mouseEvent -> {
            if (!mouseEvent.isPrimaryButtonDown()) {
                byNode.setCursor(Cursor.DEFAULT);
            }
        });
    }

    private javafx.scene.shape.Rectangle makeSmoke(Stage stage) {
        return new javafx.scene.shape.Rectangle(
                stage.getWidth(),
                stage.getHeight(),
                Color.WHITESMOKE.deriveColor(
                        0, 1, 1, 0.08
                )
        );
    }

    /** records relative x and y co-ordinates. */
    private static class Delta {
        double x, y;
    }

    public static void main(String[] args) {
        launch(args);
    }
}

相关问题

Answer 2

您希望操作系统依赖窗口装饰的视觉效果只能通过操作系统提供的API实现。因此被下面的StageStyle.TRANSPARENT淘汰了。

对于JavaFX内容本身，您可以控制stage > scene > root pane层次结构的视觉效果。舞台和场景不支持（而不是旨在）支持高级风格，因此通过在下面设置透明来消除。

@Override
public void start(Stage primaryStage) {
    StackPane root = new StackPane();
    root.setStyle("-fx-background-color: null;");
    root.setPadding(new Insets(10));

    DoubleProperty doubleProperty = new SimpleDoubleProperty(0);

    Region region = new Region();
    region.styleProperty().bind(Bindings
            .concat("-fx-background-radius:20; -fx-background-color: rgba(56, 176, 209, ")
            .concat(doubleProperty)
            .concat(");"));
    region.setEffect(new DropShadow(10, Color.GREY));

    Slider slider = new Slider(0, 1, .3);
    doubleProperty.bind(slider.valueProperty());

    root.getChildren().addAll(region, slider);

    primaryStage.initStyle(StageStyle.TRANSPARENT);
    Scene scene = new Scene(root, 300, 250);
    scene.setFill(Color.TRANSPARENT);

    primaryStage.setTitle("Hello World!");
    primaryStage.setScene(scene);
    primaryStage.show();
}

然而，阴影效果与背景颜色的alpha值不相符。您可以通过将阴影的颜色更改为另一个对比色来观察它。

输出：
enter image description here

Answer 3

扩展Jewlsea的答案..并且仅使用JavaFX的上述示例..

虽然这些类不是公共API，但它确实完全避免了AWT堆栈。这是一个 非公开 示例：

// copy a background node to be frozen over.
    private Image copyBackground(Stage stage) {
        final int X = (int) stage.getX();
        final int Y = (int) stage.getY();
        final int W = (int) stage.getWidth();
        final int H = (int) stage.getHeight();
        final Screen screen = Screen.getPrimary();
        try {

            Robot rbt = com.sun.glass.ui.Application.GetApplication().createRobot();
            Pixels p = rbt.getScreenCapture(
                (int)screen.getBounds().getMinX(),
                (int)screen.getBounds().getMinY(), 
                (int)screen.getBounds().getWidth(), 
                (int)screen.getBounds().getHeight(), 
                true
            );

            WritableImage dskTop = new WritableImage((int)screen.getBounds().getWidth(), (int)screen.getBounds().getHeight());
            dskTop.getPixelWriter().setPixels(
                (int)screen.getBounds().getMinX(),
                (int)screen.getBounds().getMinY(),
                (int)screen.getBounds().getWidth(),
                (int)screen.getBounds().getHeight(),
                PixelFormat.getByteBgraPreInstance(),
                p.asByteBuffer(), 
                (int)(screen.getBounds().getWidth() * 4)
            );

            WritableImage image = new WritableImage(W,H);
            image.getPixelWriter().setPixels(0, 0, W, H, dskTop.getPixelReader(), X, Y);

            return image;
        } catch (Exception e) {
            System.out.println("The robot of doom strikes!");
            e.printStackTrace();

            return null;
        }
    }

添加了小阴影的结果：

    DropShadow shdw = new DropShadow();
    shdw.setBlurType(BlurType.GAUSSIAN);
    shdw.setColor(Color.GAINSBORO);
    shdw.setRadius(10);
    shdw.setSpread(0.12);
    shdw.setHeight(10);
    shdw.setWidth(10);
    layout.setEffect(shdw);

fxScreenCapture

Answer 4

不透明度是Node的一个属性，它是JavaFX中用于显示在屏幕上的内容的父类。 http://docs.oracle.com/javafx/2/api/javafx/scene/Node.html#opacityProperty

因此，您可以在要消失的对象上设置不透明度。然后，您必须添加某种方法来更改所需对象的不透明度。使用图像中的滑块是一种方式，但还有其他方式。

可以使用DropShadow效果... http://docs.oracle.com/javafx/2/api/javafx/scene/effect/DropShadow.html完成投影。我从来没用过它。这有点高，但如果评论中有跟进问题，我可以帮助回答。

JavaFX对后台的影响

4 个答案: