The Optional showAndWait() method presents the dialog and waits for a user response before dismissing the dialog. The dialog's title is specified by calling void setTitle(String title), its header text is specified by calling void setHeaderText(String headerText), and its content text is set by calling void setContentText(String contentText). The Alert(Alert.AlertType alertType) constructor is called to initialize an Alert dialog object to a specific alertType. Clicking each button demonstrates either the confirmation, error, information, or warning dialog with custom or default header text. Listing 2 describes an application whose user interface consists of eight buttons in a horizontal line. HboxForm.getChildren().addAll(btn1, btn2, btn3, btn4, btn5, btn6, btn7, Information dialog without header messageĪlert alert = new Alert(AlertType.WARNING) ĪtContentText("The battery charge is low.") Information dialog with header messageĪlert alert = new Alert(AlertType.INFORMATION) ĪtContentText("The time is currently 10PM.") Confirmation dialog without header messageĪlert alert = new Alert(AlertType.ERROR) ĪtContentText("Paper not loaded") Confirmation dialog with header messageĪlert alert = new Alert(AlertType.CONFIRMATION) ĪtContentText("Do you want to exit the " + Public class AlertDemo extends void start(Stage primaryStage) Listing 2 presents an application that demonstrates all of the possibilities. Q: Can you present a JavaFX application that demonstrates the various alert dialogs?Ī: Listing 1 revealed the use of Alert for presenting an error dialog. A text-input dialog presents a text-input control and solicits the input of text.Ī: JavaFX supports alert dialogs via the class and its nested AlertType enum. A choice dialog presents a list of items and allows at most one of these items to be chosen. An alert dialog presents a confirmation, error, information, or warning message. Q: What standard dialogs does JavaFX support?Ī: JavaFX supports alert, choice, and text-input standard dialogs. Q: Can you provide me with more information about JavaFX's support for accessibility?Ī: Check out The New JavaFX Accessibility API, which is a video that provides a complete presentation on JavaFX's accessibility support. This time, you should hear "Enter temperature in degrees" instead of "Degrees".
#LAYOUT INSIDE BUTTONBAR JAVAFX CODE#
While experimenting, insert the following line of code after tLabelFor(txtDegrees) : tAccessibleText("Enter temperature in degrees.") You should not hear the computer voice utter "Degrees". Comment out this code and listen to the result. As well as describing the window, Narrator speaks the digits as they are enteredīecause of tLabelFor(txtDegrees), Narrator speaks "Degrees, editable text" instead of "editable text" when the text field has the focus. Switch away from this window and run TempVerter as follows: java TempVerterįigure 2 presents this application's user interface. Narrator presents a configuration window for choosing various preferences
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