JavaFX 对背景的影响
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JavaFX effect on background
提问by Taconut
I'm using thisto make a iOS-themed JavaFX2 (Java7) application with a frosted glass effect. The problem is that this code uses its effect on an ImageView. I'd like it to use its effect on whatever's behind the window, like this:
我正在使用它来制作具有磨砂玻璃效果的 iOS 主题 JavaFX2 (Java7) 应用程序。问题是这段代码在 ImageView 上使用了它的效果。我希望它对窗口后面的任何东西使用它的效果，如下所示：
Is there anyway to do that? I'd also like that small drop-shadow effect you see around the above image.
有没有办法做到这一点？我也喜欢你在上图周围看到的小阴影效果。
To be clear, I don't want that slider or anything, just the effect of being able to see through the window and having that slight shadow around the edges. I want to use this iOS7-ish effectinstead of aero, though.
明确地说，我不想要那个滑块或任何东西，只想要能够透过窗户看到并在边缘周围有轻微阴影的效果。不过，我想使用这种 iOS7 风格的效果而不是气动效果。
This might be important: I'm using a modified version of Undecorator.
这可能很重要：我使用的是Undecorator的修改版本。
采纳答案by jewelsea
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);
}
}
Related Questions
相关问题
回答by Jose Martinez
The opacity is a property of Node, which is the parent class in JavaFX for things that show up on the screen. http://docs.oracle.com/javafx/2/api/javafx/scene/Node.html#opacityProperty
不透明度是 Node 的一个属性，它是 JavaFX 中显示在屏幕上的东西的父类。 http://docs.oracle.com/javafx/2/api/javafx/scene/Node.html#opacityProperty
So you can just set the opacity on the object that you want to have fade away. You then have to add some sort of way to change the opacity on the desired object. Using the slider from your image is one way, but there are others.
因此，您只需在要淡化的对象上设置不透明度即可。然后，您必须添加某种方式来更改所需对象的不透明度。使用图像中的滑块是一种方法，但还有其他方法。
Drop shadows can be done using the DropShadow effect... http://docs.oracle.com/javafx/2/api/javafx/scene/effect/DropShadow.html. I have never used it. This is a little high level but if there are follow up questions in the comments I can help answer them.
可以使用 DropShadow 效果完成投影... http://docs.oracle.com/javafx/2/api/javafx/scene/effect/DropShadow.html。我从未使用过它。这有点高，但如果评论中有后续问题，我可以帮助回答。
回答by Uluk Biy
The visual effect that you want for OS dependent window decoration, can only be achieved through the APIs that OS provides. And thus was eliminated by StageStyle.TRANSPARENTbelow.
依赖于操作系统的窗口装饰你想要的视觉效果，只能通过操作系统提供的 API 来实现。就这样被StageStyle.TRANSPARENT下面淘汰了。
For JavaFX content itself, you can control the visuals of the stage > scene > root panehierarchy. Stage and scene do not (and not aimed to) support advanced stylings so were eliminated by setting as transparent below.
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（也不旨在）支持高级样式，因此通过在下面设置为透明来消除。
@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();
}
However the drop shadow effect does not play well with alpha value of the background color. You can observe it by changing the shadow's color to another contrast one.
然而，阴影效果在背景颜色的 alpha 值下效果不佳。您可以通过将阴影的颜色更改为另一种对比色来观察它。
Output:
输出：
回答by jdub1581
To expand on Jewlsea's answer .. And using the above example with JavaFX ONLY ..
扩展Jewlsea的答案..并仅使用JavaFX的上述示例..
While the classes are not public API, it does avoid the AWT stack completely. Here is a non publicexample :
虽然这些类不是公共 API，但它确实完全避免了 AWT 堆栈。这是一个非公开的例子：
// 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;
}
}
Results with a small dropshadow added:
添加了一个小阴影的结果：
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);
