FULL PRODUCT VERSION :


ADDITIONAL OS VERSION INFORMATION :
Windows 7 Professional
Service Pack 1

A DESCRIPTION OF THE PROBLEM :
The layoutChildren method of the TabPaneSkin sets the Pos of the TabContentArea everytime to TOP_LEFT, independend of the settings of inline styles or additional styleSheets.

The Problem is the code snippet in TabPaneSkin at Line 605:
tabContent.setAlignment(Pos.TOP_LEFT);

Removing this and extend modena.css would be very fine.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Creating the class FXTabPaneTest and the cssFile TabPaneStyle (Codes are appended)
See the TabPane and do some of the following:
- Click on the "SomeText"-Label
- Switch the window focus to another window
- Resize the window

The Label jumps into the center and on layoutChildren of the TabPane it jumps to the TOP_LEFT Pos.



EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The Label should stay in the center. (or any other pos that is defined in css)
ACTUAL -
The Label jumps into the center and on layoutChildren of the TabPane it jumps to the TOP_LEFT Pos.



REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
========================== FXTabPaneTest.java
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.Tab;
import javafx.scene.control.TabPane;
import javafx.stage.Stage;

import java.net.URL;

public class FXTabPaneTest extends Application {

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

  @Override
  public void start(Stage primaryStage) throws Exception {
    TabPane tabPane = new TabPane();

    URL url = getClass().getResource("TabPaneStyle.css");
    tabPane.getStylesheets().add(url.toExternalForm());

    Label label = new Label("SomeText");
    tabPane.getTabs().add(new Tab("Text", label));

    primaryStage.setScene(new Scene(tabPane, 300, 300));
    primaryStage.show();
  }
}

========================== TabPaneStyle.css
.tab-pane > .tab-content-area {
     -fx-alignment: center;
 }
---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
Not really possible.