I have a ComboBox<Category> which I can easily fill with my ObservableList<Category>.
I want in a initialization popup window to set that ComboBox value to a specific Category.getName(). How can I achieve that?
Select the required item in the SelectionModel of the ComboBox.
comboBox.getSelectionModel().select("oranges");
Here is a sample app to demo this:
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.ComboBox;
import javafx.scene.layout.Pane;
import javafx.stage.Stage;
public class ComboControl extends Application {
#Override public void start(Stage stage) {
ComboBox<String> comboBox = new ComboBox<String>();
comboBox.getItems().addAll(
"apples",
"oranges",
"pears"
);
comboBox.getSelectionModel().select("oranges");
stage.setScene(new Scene(new Pane(comboBox)));
stage.show();
}
public static void main(String[] args) { launch(args); }
}
Related
I am making a Editable ComboBox which show any values contain the input and it works fine.
But the problem is in the input field, whenever i typed Space or arrow buttons the input field keep reseting.
I tried setonKeyPressed and setonKeyTyped too but it isn't solve the problem.
import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.ComboBox;
import javafx.scene.input.KeyEvent;
import javafx.scene.layout.HBox;
import javafx.stage.Stage;
public class Main extends Application {
#Override
public void start(Stage primaryStage) throws Exception{
ObservableList<String> fruit = FXCollections.observableArrayList();
fruit.add("apple");
fruit.add("orange");
fruit.add("banana");
ComboBox myComboBox = new ComboBox();
myComboBox.setEditable(true);
myComboBox.setOnKeyReleased(new EventHandler<KeyEvent>() {
#Override
public void handle(KeyEvent keyEvent) {
myComboBox.getItems().clear();
myComboBox.show();
String input = myComboBox.getEditor().getText();
for ( int i = 0 ; i < fruit.size(); i++) {
if(fruit.get(i).contains(input)) { //Check if the list contains the input
myComboBox.getItems().add(fruit.get(i));
}
}
}
});
HBox hbox = new HBox(myComboBox);
primaryStage.setScene(new Scene(hbox, 300, 275));
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
I'm new new to javafx and I would like just to print the the coordinates of the mouse click.
I've seen examples but I've got an error in the EventHandler line that I don't understand, it says:
anonymous javafxapplication2.JavaFXApplication2$1 is not abstract and does not override abstract method handle(Event) in EventHandler
What's the problem? Thanks!
package javafxapplication2;
import javafx.application.Application;
import javafx.event.Event;
import javafx.event.EventHandler;
import javafx.event.EventType;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.input.MouseEvent;
import javafx.scene.shape.Line;
import javafx.stage.Stage;
public class JavaFXApplication2 extends Application {
#Override
public void start(Stage primaryStage) {
Line line = new Line();
Group root = new Group(line);
Scene scene = new Scene(root, 800, 800);
scene.addEventHandler(MouseEvent.MOUSE_CLICKED, new EventHandler() {
#Override
public void handle(MouseEvent event) {
System.out.println(event.getX());
System.out.println(event.getY());
}
}
primaryStage.setTitle("Disegna linee");
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
From looking at the documentation here on javafx handlers I believe your problem is that you need to provide the type to the new eventHandler like
scene.addEventHandler(MouseEvent.MOUSE_CLICKED,
new EventHandler<MouseEvent>() { // Was missing the <MouseEvent>
#Override
public void handle(MouseEvent event) { ... };
});
I am trying to run this application in which I used event-handling and it won't compile and won't show anything. I am currently using NetBeans 8.1. What is that I did wrong. Also it is not showing any errors.
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.HBox;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
public class event extends Application {
public void start(Stage primaryStage)
{
HBox pane = new HBox();
pane.setAlignment(Pos.CENTER);
Button btOk = new Button("OK");
Button btCancel = new Button("Cancel");
OkHandlerClass handler1 = new OkHandlerClass();
btOk.setOnAction(handler1);
CancelHandlerClass handler2 = new CancelHandlerClass();
pane.getChildren().addAll(btOk, btCancel);
Scene scene = new Scene(pane);
primaryStage.setTitle("Handle the fucking event");
primaryStage.setScene(scene);
primaryStage.show();
}
class OkHandlerClass implements EventHandler<ActionEvent>{
public void handle(ActionEvent e) {
System.out.println("OK button clicked");
}
}
class CancelHandlerClass implements EventHandler<ActionEvent>{
public void handle(ActionEvent event) {
System.out.println("Cancel button clicked");
}
}
public static void main(String[] args) {
launch(args);
}
}
I need to bring to front JavaFX FXML window from itself. Something like this:
procedure (boolean close)
{
if(close)
current_window.toFront();
}
How should I get this window(scene) ?
Try this
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.VBox;
import javafx.scene.text.Font;
import javafx.scene.text.Text;
import javafx.stage.Stage;
public class Main extends Application {
#Override
public void start(Stage stage) {
Text text = new Text("!");
text.setFont(new Font(40));
VBox box = new VBox();
box.getChildren().add(text);
final Scene scene = new Scene(box,300, 250);
scene.setFill(null);
stage.setScene(scene);
stage.show();
stage.toFront();
}
public static void main(String[] args) {
launch(args);
}
}
If you have access to any of the nodes, you can use the following
((Stage)node.getScene().getWindow()).toFront();
I have a ListView and I want it to change the selected item when I click a different item. For example, I have:
result.getSelectionModel().select(0);
I want to change that .select(0) to .select(x), where x is the index on that ListView, from a mouse click. I'm not sure if I explained it correctly.
Hope you can help, thanks!
The default behaviour of a ListView is to select the item the user clicks. There is nothing you need to code to achieve this.
Just run the following sample and click on the list items and you will see the selection change.
import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.scene.Scene;
import javafx.scene.control.ListView;
import javafx.stage.Stage;
public class ListViewViewer extends Application {
#Override
public void start(Stage stage) {
ListView<String> list = new ListView<>();
ObservableList<String> items = FXCollections.observableArrayList(
"Single", "Double", "Suite", "Family App");
list.setItems(items);
list.getSelectionModel().select(0);
stage.setScene(new Scene(list));
stage.show();
list.requestFocus();
}
public static void main(String[] args) {
launch(args);
}
}