Dialog can't be blocked when FileChooser is open - javafx

Question

I have question about blocking Dialog window when I'm opening FileChooser. When I open FileChooser from main app window I don't have any problem with blocking main window of app (using fileChooser.showOpenDialog(Main.getPrimaryStage);). But I have problem when I'm opening Filechooser from Dialog. I can't focus on main app window, because Dialog has property dialog.initOwner(Main.getPrimaryStage());, but I still can focus on Dialog and open next FileChooser, over and over again. App image view. What can I do with this ?

Answer 1

You can get a reference to the window used to display a dialog from its dialogPane, via:
Window dialogWindow = dialog.getDialogPane().getScene().getWindow();
Using this, you can make the "owner" of the file chooser the dialog's window:
Window dialogWindow = dialog.getDialogPane().getScene().getWindow();
File file = fileChooser.showOpenDialog(dialogWindow);
Here's a SSCCE:
import java.io.File;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.ButtonType;
import javafx.scene.control.Dialog;
import javafx.scene.control.DialogPane;
import javafx.scene.layout.StackPane;
import javafx.stage.FileChooser;
import javafx.stage.Stage;
import javafx.stage.Window;
public class DialogFileChooser extends Application {
#Override
public void start(Stage primaryStage) {
Button button = new Button("Open Dialog...");
button.setOnAction(e -> createDialog(primaryStage).show());
StackPane root = new StackPane(button);
Scene scene = new Scene(root, 400, 400);
primaryStage.setScene(scene);
primaryStage.show();
}
private Dialog<ButtonType> createDialog(Window owner) {
DialogPane dialogPane = new DialogPane();
dialogPane.getButtonTypes().add(ButtonType.CLOSE);
Dialog<ButtonType> dialog = new Dialog<>();
dialog.setDialogPane(dialogPane);
Button openFile = new Button("Open File...");
FileChooser fileChooser = new FileChooser();
openFile.setOnAction(e -> {
Window dialogWindow = dialog.getDialogPane().getScene().getWindow();
File file = fileChooser.showOpenDialog(dialogWindow);
System.out.println(file);
});
dialogPane.setContent(new StackPane(openFile));
dialog.initOwner(owner);
return dialog ;
}
public static void main(String[] args) {
launch(args);
}
}