In the following code I have a TextField and a Button. I need to disable the Button when ever the TextField is empty, so that I can avoid entering empty values to the database. How can I make the button disabled ?
private VBox addVBox() {
VBox vb1 = new VBox();
vb1.setPadding(new Insets(15, 20, 25, 20));
vb1.setSpacing(15);
vb1.setStyle("-fx-background-color: #333333;");
final Label label = new Label("Staff Details");
label.setFont(Font.font("Arial", FontWeight.BOLD, 20));
label.setTextFill(Color.WHITE);
TableColumn sub = new TableColumn("Staff Name");
sub.setMinWidth(400);
sub.setCellValueFactory(
new PropertyValueFactory<Staff, String>("subName"));
table.setItems(data);
table.getColumns().addAll(sub);
addSubName = new TextField();
addSubName.setPromptText("Staff Name");
addSubName.setPrefSize(200, 30);
final Button b2 = new Button("Add");
b2.setFont(Font.font("Calibri", FontWeight.BOLD, 17));
b2.setPrefSize(70, 30);
b2.setStyle(" -fx-base: #0066ff;");
b2.setTextFill(Color.BLACK);
b2.setOnAction(new EventHandler<ActionEvent>() {
@Override
public void handle(ActionEvent e) {
msg = addSubName.getText();
try {
enterStaff();
} catch ( ClassNotFoundException | SQLException ex) {
Logger.getLogger(AddStaff.class.getName()).log(Level.SEVERE, null, ex);
}
data.add(new Staff(addSubName.getText()));
addSubName.clear();
}
});
hb.getChildren().addAll(addSubName, b2);
hb.setSpacing(5);
vb1.getChildren().addAll(label, table, hb);
return vb1;
}
Similar to Uluk's answer, but using the Bindings fluent API:
btn.disableProperty().bind(
Bindings.isEmpty(textField1.textProperty())
.and(Bindings.isEmpty(textField2.textProperty()))
.and(Bindings.isEmpty(textField3.textProperty()))
);
Also note that, this new overloaded method of Bindings
is added in JavaFX-8 and not avaliable in JavaFX-2.