JavaFX closing application modal dialog


I'm using <a href="https://stackoverflow.com/questions/14168064/how-to-create-a-javafx-dialog" rel="nofollow">this</a> example to create application modal dialog. When I click exit button on my dialog (red one in top right corner) everything works fine. Dialog gets closed and then I can open it normaly. But when I try to add a Button which closes my dialog, everything works fine until I try to reopen it. After that, it throws me a IllegalStateException (I'll update answer with this exception if needed).

This is an event handler which demonstrates how I close a dialog:

btnClose.setOnAction(new EventHandler<ActionEvent>() { @Override public void handle(ActionEvent event) { dialog.close(); } });

Can someone tell me how to properly close application modal dialog? Thanks in advance.



I see you found your issue, guess I just keep my answer with the sample code in case somebody else has a similar issue.

<hr />

Your btnClose action works for me, so the issue is probably in some code which you have not posted.

Here is a sample I created to test it:

import javafx.application.Application; import javafx.event.*; import javafx.geometry.Pos; import javafx.scene.*; import javafx.scene.control.*; import javafx.scene.layout.*; import javafx.stage.*; public class DialogClosing extends Application { @Override public void start(final Stage stage) { final Button showDialog = new Button("Show Dialog"); showDialog.setOnAction(new EventHandler<ActionEvent>() { @Override public void handle(ActionEvent actionEvent) { showDialog(stage, showDialog); } }); StackPane layout = new StackPane(); layout.getChildren().setAll( showDialog ); layout.setStyle("-fx-padding: 10px;"); stage.setScene( new Scene( layout ) ); stage.show(); } private Stage showDialog(Window parent, final Node showControlNode) { showControlNode.setDisable(true); final Stage dialog = new Stage(); dialog.initOwner(parent); dialog.initStyle(StageStyle.UTILITY); dialog.setX(parent.getX()); dialog.setY(parent.getY() + parent.getHeight()); Button closeDialog = new Button("Close Dialog"); closeDialog.setOnAction(new EventHandler<ActionEvent>() { @Override public void handle(ActionEvent actionEvent) { dialog.close(); } }); dialog.setOnHidden(new EventHandler<WindowEvent>() { @Override public void handle(WindowEvent windowEvent) { showControlNode.setDisable(false); } }); VBox layout = new VBox(10); layout.setAlignment(Pos.CENTER); layout.getChildren().addAll( new Label("Hello World!"), closeDialog ); layout.setStyle("-fx-padding: 10px;"); Scene scene = new Scene( layout, 125, 100 ); dialog.setScene(scene); dialog.show(); return dialog; } public static void main(String[] args) { launch(args); } }

<img alt="closingtimeoutput" class="b-lazy" data-src="https://i.stack.imgur.com/xskGX.png" data-original="https://i.stack.imgur.com/xskGX.png" src="https://etrip.eimg.top/images/2019/05/07/timg.gif" />


Ok, nevermind. Things fixed. Sorry for inconvenience. The problem was I declared my Stage as static.


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