import javafx.animation.KeyFrame;
import javafx.animation.KeyValue;
import javafx.animation.Timeline;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.HBox;
import javafx.scene.paint.Color;
import javafx.stage.Stage;
import javafx.stage.StageStyle;
import javafx.util.Duration;

/**
 * @author Uladzimir Rybau
 * @since 09.09.11
 */
public class OpacityTest extends Application
{
    public static void main( String[] args )
    {
        launch( args );
    }

    public void start( Stage stage )
    {
        stage.setTitle( "Opacity Test" );
        stage.setOpacity( 0.1 );

        stage.initStyle( StageStyle.TRANSPARENT );

        HBox root = new HBox();
        Button button = new Button( "Button 1" );
        button.setPrefSize( 300, 300 );
        root.getChildren().addAll( button, new Button( "Button 2" ), new Button( "Button 3" ) );

        Scene scene = new Scene( root, -1, -1, Color.AQUAMARINE );

        stage.setScene( scene );
        stage.sizeToScene();

        Timeline timeline = new Timeline();
        timeline.setCycleCount( 1 );

        double startOpacity = 0.1;
        double endOpacity = 1.0;
        //endOpacity = 0.9;

        timeline.getKeyFrames().addAll
            (
                new KeyFrame( Duration.ZERO, new KeyValue( stage.opacityProperty(), startOpacity ) ),
                new KeyFrame( new Duration( 3000 ), new KeyValue( stage.opacityProperty(), endOpacity ) )
            );

        stage.show();
        timeline.play();
    }
}