I made a circle and added as a child to a group. then I added the group as a child to a layout(Region). I added Region to the scene. I made both with different colours but I cannot see the circle
Analog_clock.java
package analog_clock;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.StackPane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.stage.Stage;
public class Analog_clock extends Application {
#Override
public void start(Stage primaryStage) {
Circle circle = new Circle();
circle.setCenterX(100.0f);
circle.setCenterY(100.0f);
circle.setRadius(50.0f);
circle.setFill(Color.ALICEBLUE);
Group g = new Group();
g.getChildren().add(circle);
Background_region_ bg = new Background_region_();
bg.getChildrenUnmodifiable().add(g);
Scene scene = new Scene(bg, 300, 250);
scene.getStylesheets().add(this.getClass().getResource("style.css").toExternalForm());
primaryStage.setTitle("Hello World!");
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
Background_Region_.java
package analog_clock;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.Region;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
public class Background_region_ extends Region
{
//CONSTRUCTOR
public Background_region_()
{
setStyle("-fx-background-color: #ACACE6");
}
}
style.css
.circle{-fx-stroke: #cdd0d7;}
The problem is the Region Class only has an Unmodifiable List of children via its public API, that means, the only way to add children to it is to subclass it (e.g Pane). So use Pane or another subclass, something like this for example:
Pane bg = new Pane();
bg.setBackground(new Background(new BackgroundFill(Color.web("#ACACE6"), null,null)));
bg.getChildren().add(g);
Use Pane instead of Region. Region is a special parent class for control's developers.
Next line throws exception in your code:
bg.getChildrenUnmodifiable().add(g);
Note word "Unmodifiable". It means your are not supposed and can't modify this list.
Related
I was trying to learn JavaFX and used the code on this video: https://www.youtube.com/watch?v=FLkOX4Eez6o.
I have Google it but could not find a solution.
Then Eclipse IDE shows this error:
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
public class Testes extends Application{
Button botao;
public static void main(String[] args) {
launch(args);
}
#Override
public void start(Stage primaryStage) throws Exception {
primaryStage.setTitle("Controle de processos");
botao = new Button();
botao.setText("+");
StackPane layout = new StackPane();
layout.getChildren().add(botao);
Scene cena = new Scene(layout, 300, 250);
primaryStage.setScene(cena);
primaryStage.show();
}
}
I am trying to create a program to teach people about GNU/Linux and the command line, I have my main.java
package sample;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;
public class Main extends Application {
Stage window;
public static void main(String[] args) {
launch(args);
}
#Override
public void start(Stage primaryStage) throws Exception {
window = primaryStage;
Parent root = FXMLLoader.load(getClass().getResource("login.fxml"));
primaryStage.setTitle("Learnix");
primaryStage.setScene(new Scene(root, 800, 500));
primaryStage.show();
}
}
And the controller to go with it.
package sample;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import java.io.IOException;
public class loginController {
public Button loginBtn;
public void loginBtnClick() throws IOException {
System.out.println("You are logged in");
}
}
I have tried things such as:
FXMLLoader.load(getClass().getResource("lessons.fxml"));
But I can't figure out how to get it to swap scenes. I have seen many tutorials on YouTube and it Stack Overflow but many of them have all of the JavaFX on the main.java and not in separate files as I am using scenebuilder.
Thank you.
You can either call Stage.setScene() to change the whole scene or just substitute a root to the new one by Scene.setRoot():
Parent newRoot = FXMLLoader.load(getClass().getResource("lessons.fxml"));
primaryStage.getScene().setRoot(newRoot);
Is it possible to use a Node as a mouse cursor? I'm thinking in a ProgressIndicator. For example a determinate one, letting the user know how much percentage of the current task is done.
Probably the most reliable way to do this is to set the cursor to Cursor.NONE, and have a label with the progress indicator as its graphic, which tracks the mouse coordinates.
I tried using an ImageCursor which updated, but nothing appeared: I am guessing the images couldn't be computed quickly enough.
Here's an SSCCE of the first technique:
import javafx.application.Application;
import javafx.beans.binding.Bindings;
import javafx.concurrent.Service;
import javafx.concurrent.Task;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Cursor;
import javafx.scene.ImageCursor;
import javafx.scene.Node;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.ProgressIndicator;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.Pane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;
public class ProgressIndicatorAsCursor extends Application {
#Override
public void start(Stage primaryStage) {
Button button = new Button("Start");
Service<Void> service = new Service<Void>() {
#Override
public Task<Void> createTask() {
return new Task<Void>() {
#Override
public Void call() throws Exception {
for (int i = 1 ; i <= 1000; i++) {
Thread.sleep(10);
updateProgress(i, 1000);
}
return null ;
}
};
}
};
button.disableProperty().bind(service.runningProperty());
button.setOnAction(e -> service.restart());
ProgressIndicator pi = new ProgressIndicator();
pi.progressProperty().bind(service.progressProperty());
Pane pane = new Pane();
// fill pane with rectangle as task progresses:
Rectangle rectangle = new Rectangle();
rectangle.setFill(Color.CORNFLOWERBLUE);
rectangle.setX(0);
rectangle.widthProperty().bind(pane.widthProperty());
rectangle.heightProperty().bind(pane.heightProperty().multiply(service.progressProperty()));
rectangle.yProperty().bind(pane.heightProperty().subtract(rectangle.heightProperty()));
pane.getChildren().add(rectangle);
Label label = new Label();
label.graphicProperty().bind(
Bindings.when(service.runningProperty())
.then(pi)
.otherwise((ProgressIndicator)null));
pane.setOnMouseEntered(e ->
pane.getChildren().add(label));
pane.setOnMouseExited(e ->
pane.getChildren().remove(label));
pane.setOnMouseMoved(e -> label.relocate(e.getX(), e.getY()));
pane.cursorProperty().bind(
Bindings.when(service.runningProperty())
.then(Cursor.NONE)
.otherwise(Cursor.DEFAULT));
BorderPane.setAlignment(button, Pos.CENTER);
BorderPane.setMargin(button, new Insets(10));
BorderPane root = new BorderPane(pane, new Rectangle(0,0,0,20), null, button, null);
primaryStage.setScene(new Scene(root, 400, 600));
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
Sees it's impossible, but you could obtain the cursor property and keep updating it with an image as your desire.
so maybe I'm not using the method how it's intended to be used but a video I watched by youtube user thenewboston used it exactly like this and it worked just fine. Help would be appreciated
package checkers;
import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.FlowLayout;
import javafx.scene.Scene ;
import javafx.scene.control.*;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.HBox;
import javafx.application.*;
import javafx.stage.*;
public class Checkers extends Application {
Stage window;
public void start(Stage primaryStage) throws Exception {
window = primaryStage;
window.setTitle("Title");
HBox layout = new HBox();
Button startButton = new Button("Start");
Button quitButton = new Button("Quit");
layout.getChildren().addAll(startButton, quitButton);
Scene startScene = new Scene(layout, 400, 300);
window.setScene(startScene);
window.show();
}
public static void main(String[] args) {
launch(args);
}
}
`
The error I am receiving is as follows -
"The method addAll(int, Collection) in the type List is not applicable for the arguments (Button, Button)"
You imported the wrong type of Button. You want import javafx.scene.control.Button; not import java.awt.Button;
I want my ball to change color everytime i click on it, but i wont get it to work. Also im wondering about the movement of my ball. I wonder how you can change the path its going. so it can down up and down and other ways instead of just from left to right.
import javafx.animation.KeyFrame;
import javafx.animation.KeyValue;
import javafx.animation.Timeline;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.geometry.Rectangle2D;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.effect.Bloom;
import javafx.scene.effect.Effect;
import javafx.scene.effect.Glow;
import javafx.scene.effect.Light;
import javafx.scene.effect.Lighting;
import javafx.scene.effect.MotionBlur;
import javafx.scene.input.KeyCode;
import javafx.scene.input.KeyEvent;
import javafx.scene.layout.HBox;
import javafx.scene.layout.Pane;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.stage.Screen;
import javafx.stage.Stage;
import javafx.util.Duration;
public class TimelineSample extends Application {
Timeline timeline;
private void init(Stage primaryStage) {
Group root = new Group();
primaryStage.setResizable(false);
primaryStage.setScene(new Scene(root, 280, 120));
Circle circle = new Circle(25, 25, 20, Color.BLUE);
Light.Distant light = new Light.Distant();
light.setAzimuth(-135.0);
Lighting lighting = new Lighting();
lighting.setLight(light);
lighting.setSurfaceScale(5.0);
circle.setEffect(lighting);
timeline = new Timeline();
timeline.setCycleCount(Timeline.INDEFINITE);
timeline.setAutoReverse(true);
timeline.getKeyFrames().addAll
(new KeyFrame(Duration.ZERO, new KeyValue(circle.translateXProperty(),
0)),
new KeyFrame(new Duration(4000), new KeyValue(circle
.translateXProperty(), 205)));
root.getChildren().add(circle);
root.requestFocus();
root.setOnKeyPressed(e -> {
if (e.getCode().equals(KeyCode.ENTER)) {
timeline.play();
circle.setFill(Color.PINK);
}
});
root.setOnMousePressed(event -> {
if (circle.contains(event.getX(), event.getY())) {
circle.setFill(Color.BLACK);
if (circle.getFill().equals(Color.BLACK))
circle.setFill(Color.YELLOW);
else if (circle.getFill().equals(Color.BLUE))
circle.setFill(Color.BROWN);
else if (circle.getFill().equals(Color.YELLOW))
circle.setFill(Color.BROWN);
else if (circle.getFill().equals(Color.BROWN))
circle.setFill(Color.BLACK);
}
});
}
#Override
public void stop() {
timeline.stop();
}
#Override
public void start(Stage primaryStage) throws Exception {
init(primaryStage);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
It does not change the color (just once to yellow) because before your check you set it to black and then it is converted to yellow.
if (circle.contains(event.getX(), event.getY())) {
circle.setFill(Color.BLACK); // <-- so it is black
if (circle.getFill().equals(Color.BLACK)) // <-- uhh..it is black..let's change to yellow
circle.setFill(Color.YELLOW);
else if (circle.getFill().equals(Color.BLUE))
circle.setFill(Color.BROWN);
else if (circle.getFill().equals(Color.YELLOW))
circle.setFill(Color.BROWN);
else if (circle.getFill().equals(Color.BROWN))
circle.setFill(Color.BLACK);
}
And it is getting from left to right because your using the X-Property instead of the Y-Property.