Wobbly left contents in SplitPane when moving divider in JavaFX 11 onwards

[Jason Shattu]

Hi all,

this code highlights the problem running on JavaFX 11+,

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.SplitPane;
import javafx.scene.control.TextArea;
import javafx.stage.Stage;

public class DemoBug extends Application
{

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

     public void start(Stage primaryStage) {

         TextArea textArea = new TextArea("I am Wobbly\nwhen you move 
the\n divider\nthis TextArea can be any component\nfor the problem to 
happen");

         SplitPane s = new SplitPane(textArea, new TextArea("def"));

         primaryStage.setScene(new Scene(s,300,300));
         primaryStage.show();

     }
}


Thanks,
Jason

------ Original Message ------
From: "Kevin Rushforth" <kevin.rushforth at oracle.com>
To: openjfx-dev at openjdk.java.net
Sent: 13/04/2019 13:58:12
Subject: Re: child z ordering

>See Parent::viewOrder.
>
>-- Kevin
>
>On 4/12/2019 12:32 PM, James Dunsdon wrote:
>>Hi,
>>
>>I'm wondering if there is any consideration towards being able to modify child Z ordering. Currently it only seems based on add order. There are a few use cases where slight overlapping might be desired in which case z ordering should be independently controllable of layout order. toFront(), toBack() only seem to work with Groups. I've given a code example of a use case below. My current workaround is to use rotations to created the desired effect.
>>
>>
>>import javafx.application.Application;
>>import javafx.geometry.Pos;
>>import javafx.scene.Node;
>>import javafx.scene.Parent;
>>import javafx.scene.Scene;
>>import javafx.scene.layout.HBox;
>>import javafx.scene.layout.VBox;
>>import javafx.scene.paint.Color;
>>import javafx.scene.shape.Circle;
>>import javafx.scene.shape.Rectangle;
>>import javafx.stage.Stage;
>>
>>public class Main extends Application {
>>
>>     @Override
>>     public void start(Stage primaryStage) throws Exception{
>>         Parent root = new VBox(createDefaultBehavior(), createPreferredBehavior());
>>         primaryStage.setTitle("Hello World");
>>         primaryStage.setScene(new Scene(root, 300, 275));
>>         primaryStage.show();
>>     }
>>
>>     private Node createDefaultBehavior(){
>>         HBox box = new HBox(createCircle(), createRectangle());
>>         box.setAlignment(Pos.CENTER_LEFT);
>>         box.setSpacing(-10);
>>         return box;
>>     }
>>
>>     /*
>>     in this case since we are using symmetric shapes the node rotations are unnecessary,
>>     however they would be required for most content
>>      */
>>     private Node createPreferredBehavior(){
>>         Node circle = createCircle();
>>         circle.setRotate(-180);
>>         Node rectangle = createRectangle();
>>         rectangle.setRotate(-180);
>>         HBox box = new HBox(rectangle, circle);
>>         box.setAlignment(Pos.CENTER_RIGHT);
>>         box.setRotate(180);
>>         box.setSpacing(-10);
>>         return box;
>>     }
>>
>>     private Node createCircle(){
>>         Circle circle = new Circle(30, Color.RED);
>>         circle.setStroke(Color.GOLDENROD);
>>         circle.setStrokeWidth(4.0);
>>         return circle;
>>     }
>>
>>     private Node createRectangle(){
>>         Rectangle rectangle = new Rectangle(100, 40, Color.GREEN);
>>         rectangle.setStroke(Color.GOLDENROD);
>>         rectangle.setStrokeWidth(4.0);
>>         return rectangle;
>>     }
>>
>>
>>     public static void main(String[] args) {
>>         launch(args);
>>     }
>>}
>>
>>
>>Thanks,
>>
>>James Dunsdon
>>
>>(nervous first time poster)
>>
>>
>>
>