I'm programming with a library that I don't know the code, only the methods, and I can't modify it. I tried to make a tableview of "flights" and it works but I don't know how to put a name(or ID) for each fly. Can someone help me? Thanks. Some code here:
public class StageController {
#FXML private TableView<Flight> flightsTable;
#FXML private TableColumn<Flight, String> flightColumn;
public void start(Airport air){
final AirportFlights a = Data.getInstance().getAirportFlights(air);
ObservableList<Flight> flights = FXCollections.observableArrayList(a.getArrivals().getFlights().values());
flightsTable.setItems(flights);
}
You need to declare a valueFactory for your tablecolumn. If you have a field name inside your Flight class then, you can do :
flightColumn.setCellValueFactory(
new PropertyValueFactory<Flight, String>("name"));
Related
I want to create a JavaFX fxml based dialog, where the user can enter a bunch of integer and double values. I created the dialog in SceneBuilder using for each of the values a dedicated TextField.
Intentionally I am not using Binding between the TextFields and the model. In order to NOT add a ChangeListener or set a TextFormatter to each of these TextFields in the controller again and again, I created a dedicated IntegerTextField and DoubleTextField class, e.g.
public class IntegerTextField extends TextField {
protected static Pattern decimalPattern = Pattern.compile("^-?\\d+$"); // Double ("-?\\d*(\\.\\d{0,1})?");
public IntegerTextField() {
super();
setTextFormatter(new TextFormatter<>(c -> (decimalPattern.matcher(c.getControlNewText()).matches()) ? c : null ));
}
public int getInt() {
try {
return Integer.parseInt(getText());
}
catch (NumberFormatException e) {
return 0;
}
}
}
and in the Controller class I replaced the previous
#FXML private TextField setsTextField;
with
#FXML private IntegerTextField setsTextField;
When I got the
javafx.fxml.LoadException:...Can not set util.IntegerTextField field ctrl.ExerciseEditorCtrl.setsTextField to javafx.scene.control.TextField
I realized that this implicit downcasting doesn't work.
Is there a way to do this properly with fxml or is it neccessary to have the dialog setup in a java class when using IntegerTextField?
I am building an application using JavaFX. What I am trying to do is generate a message according to the user input values. So there are one text-field and one combo-box and one check-box per row and there are many rows like the following.
Let's say I will generate three different messages according to the user values. So I need to check whether those fields are empty or not and check each field's value to generate a specific message. Checking fields are okay for just three rows like the above. But I have 10 fields. So I have to check each and generate or append my own message. And also if the user checked the check-box need to group all checked row values. So what I am asking is there any good way (best practice) to achieve what I need or an easy one also? I have tried with HashMap and ArrayList. But those are not working for this.
Really appreciate it if anybody can help me. Thanks in advance.
I would probably recommend a custom node that you create on your own like below. This example is not supposed to have the same functionality as your application but just to show how to create and use custom nodes. I kept your idea in mind when creating this example it has your textfield combobox and checkbox and they are a little easier to manage. Give it a run and let me know if you have any questions
public class Main extends Application {
#Override
public void start(Stage stage) {
VBox vBox = new VBox();
vBox.setAlignment(Pos.CENTER);
ArrayList<String> itemList = new ArrayList<>(Arrays.asList("Dog", "Cat", "Turkey"));
ArrayList<HBoxRow> hBoxRowArrayList = new ArrayList<>();
for (int i = 0; i<3; i++) {
HBoxRow hBoxRow = new HBoxRow();
hBoxRow.setComboBoxValues(FXCollections.observableList(itemList));
hBoxRowArrayList.add(hBoxRow);
vBox.getChildren().add(hBoxRow.gethBox());
}
Button printTextfieldsButton = new Button("Print Textfields");
printTextfieldsButton.setOnAction(event -> {
for (HBoxRow hBoxRow : hBoxRowArrayList) {
System.out.println("hBoxRow.getTextFieldInput() = " + hBoxRow.getTextFieldInput());
}
});
vBox.getChildren().add(printTextfieldsButton);
stage.setScene(new Scene(vBox));
stage.show();
}
//Below is the custom Node
public class HBoxRow {
HBox hBox = new HBox();
ComboBox<String> comboBox = new ComboBox<>();
TextField textField = new TextField();
CheckBox checkBox = new CheckBox();
public HBoxRow(){
hBox.setAlignment(Pos.CENTER);
textField.setPrefWidth(150);
comboBox.setPrefWidth(150);
checkBox.setOnAction(event -> {
textField.setDisable(!textField.isDisabled());
comboBox.setDisable(!comboBox.isDisabled());
});
hBox.getChildren().addAll(checkBox, textField, comboBox);
}
public void setComboBoxValues(ObservableList observableList) {
comboBox.setItems(observableList);
}
public HBox gethBox(){
return hBox;
}
public String getTextFieldInput(){
return textField.getText();
}
}
}
I have a group of ToggleButtons that need to find out their id. Currently I can check the id in the getSource() and toString() method like this:
#FXML
public void btnCell(ActionEvent actionEvent) {
System.out.println(actionEvent.getSource());
}
Prints: ToggleButton[id=btn00, styleClass=toggle-button]''
Can I extract the id without relying on some shady substring busniess on that string?
hope it helps:
import javafx.scene.Node;
....
#FXML
public void btnCell(ActionEvent actionEvent) {
final Node source = (Node) actionEvent.getSource();
String id = source.getId();
Scene scene = source.getScene();
scene.lookup("#"+id).getStyleClass() ;
}
In case this is still relevant, I use a whole bunch of programmatically generated buttons (representing menu items in a POS application), identified through MyButton.setUserData(MyProdID), which is loaded from the product IDs in a database table. Then you can get that with MyButton.getUserData() in the ActionEvent handler.
I have the following controller that is instantiated many times on my gui. The reason is beacause it has a tableview that gets filled with different kind of data. Looks like this
class Controller {
#FXML
TableView<Map<String, String> myTable;
private Manager manager;
//Each TableView has different ammount of columns with different names that get dynamically added to the table view using this function
public void setUpColumns(List<TableColumn<Map<String, String>, String>> columns){
myTable.getColumns().addAll(columns);
addContextMenuToColumnHeaders();
}
private addContextMenuToColumnHeaders(){
for (TableColumn<Map<String, String>, ?> tc : myTable.getColumns()){
ContextMenu addToGraphContextMenu = createAddToGraphContextMenu(tc);
tc.setContextMenu(addToGraphContextMenu);
}
}
private ContextMenu createAddToGraphContextMenu(TableColumn<Map<String, String> String> tc){
for (MangerHandledObject mHO : manager.getHandledObjects()){
MenuItem menuItem = new MenuItem(mHO.getName());
menuItem.setOnAction(new EventHandler<ActionEvent>(){
#Override
public void handle(ActionEvent event){
//I want each menu item to have access to the column that is added to get the name of the column. Even after dynamically adding new menuItems
manager.callMethod(tc.getName());
}
});
}
}
}
The manager handled objects are not static. So the are added and deleted from the list that the manager keeps. I tried this
contextMenu.setOnShowing(......)
and before showing it will always check for the list from the manager and re-make the context menu items. But the problems is that when this executes I don't have access to the columns anymore. Is there any way to bypass this? Should I implement my own context menu to have a field of the column Name?
It worked. But I had to add at least one dummy MenuItem on my context menu in order for it to appear.
I am new to JavaFx and hence I cannot find a solution to solve my problem
Suppose I have following application structure :
- views
- first.fxml -> this has a button called btnSend and a textfield called txtEnter
- second.fxml -> this has a textarea called txtView
- Controller
- FirstController -> controller for First
- SecondController -> controller for second
- Modal
- AppModal -> here I have a getter and a setter method ,
as getText() and setText(String text)
- App
- Main.java -> This one used FXMLLoader to load first.fxml and second.fxml together.
What is the optimal/best way to display the text in SecondController passing it from FirstController. I mean, I enter a text in txtEnter and press the button btnSend and after pressing the button I want the text to be displayed in txtView which is using another controller.
I have read a lot about the observers pattern and JavaFX properties can be used to solve this, but unfortunately I am unable to implement a working solution.
I would be humbly thankful if you experts can help me in this. I know its not correct but can anyone please give me a working solution for the above project structure.
Thanks in advance.
Use an observable StringProperty in the model:
public class AppModel {
private final StringProperty text = new SimpleStringProperty();
public StringProperty textProperty() {
return text ;
}
public final String getText() {
return textProperty().get();
}
public final void setText(String text) {
textProperty().set(text);
}
}
Make your controllers have access to the model:
public class FirstController {
private final AppModel model ;
#FXML
private TextField textEnter ;
public FirstController(AppModel model) {
this.model = model ;
}
// action event handler for button:
#FXML
private void sendText() {
model.setText(textEnter.getText());
}
}
and
public class SecondController {
private final AppModel model ;
#FXML
private TextArea txtView ;
public SecondController(AppModel model) {
this.model = model ;
}
public void initialize() {
// update text area if text in model changes:
model.textProperty().addListener((obs, oldText, newText) ->
txtView.setText(newText));
}
}
The slightly tricky part now is that the controllers don't have a no-arg constructor, which means the default mechanism for the FXMLLoader to create them won't work. The easiest way is to set them manually. Remove both the <fx:controller> attributes from the FXML files, and then in your Main class do
AppModel model = new AppModel();
FXMLLoader firstLoader = new FXMLLoader(getClass().getResource("first.fxml"));
firstLoader.setController(new FirstController(model));
Parent firstUI = firstLoader.load();
FXMLLoader secondLoader = new FXMLLoader(getClass().getResource("second.fxml"));
secondLoader.setController(new SecondController(model));
Parent secondUI = secondLoader.load();
If you prefer to keep the <fx:controller> attributes in the FXML files, you can use a controllerFactory instead, which essentially instructs the FXMLLoader as to how to create a controller:
AppModel model = new AppModel();
Callback<Class<?>, Object> controllerFactory = type -> {
if (type == FirstController.class) {
return new FirstController(model);
} else if (type == SecondController.class) {
return new SecondController(model);
} else {
try {
return type.newInstance() ; // default behavior - invoke no-arg construtor
} catch (Exception exc) {
System.err.println("Could not create controller for "+type.getName());
throw new RuntimeException(exc);
}
}
};
FXMLLoader firstLoader = new FXMLLoader(getClass().getResource("first.fxml"));
firstLoader.setControllerFactory(controllerFactory);
Parent firstUI = firstLoader.load();
FXMLLoader secondLoader = new FXMLLoader(getClass().getResource("second.fxml"));
secondLoader.setControllerFactory(controllerFactory);
Parent secondUI = secondLoader.load();
You can make the controller factory even more flexible by using (more) reflection; basically you can implement the logic "if the controller type has a constructor taking an AppModel, call that constructor, otherwise call the no-arg constructor".
If you are creating a large application which needs to do a lot of this, then you might consider using afterburner.fx, which is a framework that essentially allows you to inject the model into the controllers using annotations.