Introduction to JavaFX Dialogs

Transcript

1. Introduction to JavaFX Dialogs HASUNUMA Kenji k.hasunuma@coppermine.jp @khasunuma
2. Overview
3. JavaFX Dialogs (8u40) • Alert - returns any ButtonType • TextInputDialog - returns input text • ChoiceDialog - returns choosen item • Dialog - superclass of all dialogs
4. Alert - INFORMATION
5. Alert - WARNING
6. Alert - ERROR
7. Alert - CONFIRMATION
8. Alert - NONE
9. TextInputDialog
10. ChoiceDialog
11. Usage
12. Dialog on code • Works instead of Stage. • Often, exists into a controller as a part of event procedures. • showAndWait() - show and wait, then returns a value as Optional<R>. • show() - show and wait, then returns no value.
13. Layout DialogPane ButtonTypes Graphic HeaderText ContentText Dialog
14. // Create a dialog Alert alert = new Alert(INFORMATION); ! // Setting properties alert.setTitle("Title (INFORMATION)"); alert.setHeaderText("Header Text"); alert.setContentText("Content Text"); ! // Show and obtain the result Optional<ButtonType> result = alert.showAndWait(); ! // Another way if the result is needless // alert.show();
15. Result types Dialog Result type Alert ButtonType ! OK, CANCEL, CLOSE, APPLY, FINISH, YES, NO, NEXT, PREVIOUS TextInputDialog String ChoiceDialog Type of choosen item
16. Tips
17. I want such a dialog... How?
18. I want such a dialog... How? // Add following code alert.setHeaderText(null);
19. /** * Tips #2: the way to resize a dialog. */ public class SomeController { @FXML public void onClick(ActionEvent event) { . . . Alert alert = new Alert(INFORMATION); // Using following methods to resize; // setPrefWidth, setPrefHeight and setPrefSize alert.getDialogPane().setPrefSize(400.0, 300.0); Optional<String> result = dialog.showAndWait(); /* Handle the result */ } }
20. /** * Tips #3: Simple dialog-based application. */ public class DialogApp extends Application { @Overrides public void start(Stage stage) throws Exception { TextInputDialog dialog = new TextInputDialog(); /* setting the dialog */ Optional<String> result = dialog.showAndWait(); /* handle the result */ } public static void main(String...args) { launch(args); } }
21. Conclusion
22. • The representation of JavaFX dialogs are Dialog and their subclasses. • JavaFX Dialog looks like Stage, but is not Stage. • At first create and configure a dialog, and call showAndWait method.
23. Introduction to JavaFX Dialogs HASUNUMA Kenji k.hasunuma@coppermine.jp @khasunuma