在javafx 2.0中创建未修饰的阶段

Question

我想在javafx 2.0中创建一个自定义阶段.我希望我的舞台在屏幕上投下阴影,因为其他窗口掉落了......我尝试使用以下代码:

public class ChatWindow {
final private Stage stage = new Stage(StageStyle.UNDECORATED);
private Scene scene;
private Group rg;
private Text t = new Text();
private double initx = 0, inity = 0;

public ChatWindow() {

    rg = new Group();
    scene = new Scene(rg, 320, 240);
    //scene.setFill(null);
    scene.setFill(new Color(0, 0, 0, 0));
    stage.setScene(scene);
    stage.show();
    setupStage();
}

private void setupStage() {
    Rectangle r = new Rectangle(5, 5, stage.getWidth() - 10, stage.getHeight() - 10);
    r.setFill(Color.STEELBLUE);
    r.setEffect(new DropShadow());
    rg.setOnMousePressed(new EventHandler<MouseEvent>() {
        public void handle(MouseEvent me) {
            initx = me.getScreenX() - stage.getX();// - me.getSceneX(); 
            inity = me.getScreenY() - stage.getY();
        }
    });
    rg.setOnMouseDragged(new EventHandler<MouseEvent>() {

        public void handle(MouseEvent me) {
            stage.setX(me.getScreenX() - initx);
            stage.setY(me.getScreenY() - inity);
        }
    });
    rg.getChildren().add(r);
    rg.getChildren().add(t);
}

public void setVisible() {
    stage.show();
}
}

我可以看到阴影落下,但实际上它们是一个白色的背景,它的下降.所以,它的无用,就像在彩色屏幕上看到的缺陷一样,会让它看起来很难看.

这是在白色屏幕上拍摄的屏幕:

这在彩色屏幕上:

请问解决这个问题？请帮忙.

Answer 1

您应该设置样式StageStyle.TRANSPARENT,请参阅下一个代码:

public class ChatWindow extends Application {

    @Override
    public void start(final Stage stage) throws Exception {
        stage.initStyle(StageStyle.TRANSPARENT); // here it is

        Group rg = new Group();
        Scene scene = new Scene(rg, 320, 240, Color.TRANSPARENT);
        stage.setScene(scene);
        stage.show();

        Rectangle r = new Rectangle(5, 5, stage.getWidth() - 10, stage.getHeight() - 10);
        r.setFill(Color.STEELBLUE);
        r.setEffect(new DropShadow());
        rg.getChildren().add(r);
    }

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