[Java FX 2] Stage with rounded corners and background image

转自：http://apilevel.wordpress.com/2012/10/11/java-fx-stage-with-rounded-corners-with-background-image/

I recently had a requirement of making the window of a Java FX application with rounded corners and a background image. It is simple making rounded corners but difficult with a background image filling the main stage.

After googling around i found the following discussion that says, it seems to be difficult or not possible with Java FX as of now.

https://forums.oracle.com/forums/thread.jspa?threadID=2415144

Following is a best work-around the idea is to clip the rounded corners using setClip method of the node(in the example StackPane) :

Here is an example source code [Tested with Java FX 2.2]:

=========================RoundedTest.java==========================

=========================RoundedTest.java==========================

package stage.background3;import javafx.application.Application;import javafx.event.ActionEvent;import javafx.event.EventHandler;import javafx.scene.Scene;import javafx.scene.control.Button;import javafx.scene.layout.StackPane;import javafx.scene.paint.Color;import javafx.scene.shape.Rectangle;import javafx.stage.Stage;import javafx.stage.StageStyle;public class TestStage5 extends Application {@Overridepublic void start(Stage primaryStage) {Button btn = new Button();btn.setText("Close");btn.setOnAction(new EventHandler<ActionEvent>() {@Overridepublic void handle(ActionEvent event) {System.exit(0);}});StackPane root = new StackPane();root.getChildren().add(btn);root.setId("ROOTNODE");Rectangle rect = new Rectangle(1024, 768);rect.setArcHeight(60.0);rect.setArcWidth(60.0);root.setClip(rect);Scene scene = new Scene(root, 1024, 768);primaryStage.initStyle(StageStyle.TRANSPARENT);scene.setFill(Color.TRANSPARENT);primaryStage.setTitle("Hello World!");primaryStage.setScene(scene);primaryStage.getScene().getStylesheets().setAll(TestStage5.class.getResource("main.css").toString());primaryStage.show();}public static void main(String[] args) {launch(args);}}

==========================main.css================================

#ROOTNODE {-fx-background-radius: 30;-fx-background-image:url('Tulips.jpg');-fx-border-radius: 30;-fx-border-width:5;-fx-border-color:blue;}

==========================main.css================================

following is is how the output looks like: