I am trying to figure out how to center and bind a label perfectly at the bottom of a scene. I have a simple test application here to show what I am working with and what my issue is.
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.layout.Pane;
import javafx.stage.Stage;
public class LabelTest extends Application {
#Override
public void start(Stage stage) throws Exception {
Pane root = new Pane();
Scene scene = new Scene(root, 400, 400);
Label label = new Label("Testing testing 1 2 3");
label.layoutXProperty().bind(scene.widthProperty().divide(2).subtract(label.getWidth() / 2)); //Should align label to horizontal center, but it is off
label.layoutYProperty().bind(scene.heightProperty().subtract(label.getHeight() + 35)); //Aligns the label to bottom of scene
root.getChildren().add(label);
stage.setScene(scene);
stage.show();
}
}
The logic behind my positioning makes sense to me, so I am not sure why it is not horizontally centered. I have included a screenshot below to show what the output looks like:
And below is more of what I am wanting it to look like (still off by a bit, but you get the point)
Thanks in advance to anyone who helps me out!
Let layout managers do the layout for you:
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
public class LabelTest extends Application {
#Override
public void start(Stage stage) throws Exception {
Label label = new Label("Testing testing 1 2 3");
BorderPane root = new BorderPane();
//center label by
//BorderPane.setAlignment(label, Pos.CENTER);
//root.setBottom(label);
//OR
root.setBottom(new StackPane(label));
Scene scene = new Scene(root, 400, 400);
stage.setScene(scene);
stage.show();
}
public static void main(String[] args) {
launch(args);
}
}
The issue is you are taking the values of width/height at the time of binding. And at this instance it will be 0 as they are not yet rendered. You need bind those properties as well for computing.
label.layoutXProperty().bind(scene.widthProperty().divide(2).subtract(label.widthProperty().divide(2)));
label.layoutYProperty().bind(scene.heightProperty().subtract(label.heightProperty().add(35)));
Related
I want to draw Lines in JavaFX but the program seems not to listen to the coordinates and directly draws it in the middle (i.e. center) with the same length.
Code:
package application;
import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.layout.AnchorPane;
import javafx.scene.layout.StackPane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Line;
import javafx.stage.Stage;
public class Main extends Application {
#Override
public void start(Stage stage) {
Line line = new Line(200,200,250,250);
StackPane root = new StackPane();
root.setPadding(new Insets(15));
final Scene scene = new Scene(root, 400, 250);
scene.setFill(null);
root.getChildren().addAll(line);
stage.setTitle("JavaFX Line");
stage.setScene(scene);
stage.show();
}
public static void main(String[] args) {
launch(args);
}
}
Result:
Line in Center
A StackPane is a layout pane which means that it will place any node according to its own rules which may come as a surprise as in your case. Instead you could just use a Pane which will place your line at the place you have specified. It may be a good idea to place this Pane inside your StackPane so that it fills the whole space.
In JavaFX, is there a way to "autofit" elements on a page so they take up the entire thing?
Currently, I'm trying to make the window have two buttons that together take up the entire canvas, but I am not sure how to do that, given that it is possible to stretch the window, etc. I've tried playing around with Button.setPrefSize, but the button size stays the same, it just shows you a window with two outsized buttons, the text of which is not visible.
What I currently have
What I want (but for any window size)
Here's one way (code here but also possible in Scene Builder and FXML):
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.AnchorPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.Priority;
import javafx.stage.Stage;
public class TestApplication extends Application {
#Override
public void start(Stage stage) throws Exception {
Button button1 = new Button("Button1");
HBox.setHgrow(button1, Priority.SOMETIMES);
button1.setMaxWidth(Double.MAX_VALUE);
button1.setMaxHeight(Double.MAX_VALUE);
Button button2 = new Button("Button2");
HBox.setHgrow(button2, Priority.SOMETIMES);
button2.setMaxWidth(Double.MAX_VALUE);
button2.setMaxHeight(Double.MAX_VALUE);
HBox hBox = new HBox(button1, button2);
AnchorPane.setLeftAnchor(hBox, 0.0);
AnchorPane.setRightAnchor(hBox, 0.0);
AnchorPane.setTopAnchor(hBox, 0.0);
AnchorPane.setBottomAnchor(hBox, 0.0);
AnchorPane rootContainer = new AnchorPane(hBox);
Scene scene = new Scene(rootContainer, 600, 600);
stage.setScene(scene);
stage.show();
}
public static void main(String[] args) {
launch();
}
}
I have a problem using custom Fonts in Javafx 8.
Whenever I try to display a text it gets convertet to upper case A's
my code goes as follows:
package main;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.canvas.Canvas;
import javafx.scene.canvas.GraphicsContext;
import javafx.scene.layout.Pane;
import javafx.scene.paint.Color;
import javafx.scene.text.Font;
import javafx.stage.Stage;
public class Main extends Application {
private Canvas can;
private GraphicsContext gc;
public static void main(String[] args) {
launch(args);
}
#Override
public void start(Stage stage) throws Exception {
Pane root = new Pane();
Scene scene = new Scene(root, 800, 400);
stage.setTitle("Test");
can = new Canvas(scene.getWidth(), scene.getHeight());
gc = can.getGraphicsContext2D();
root.getChildren().add(can);
stage.setResizable(false);
stage.setScene(scene);
stage.show();
InputStream is = Main.class.getResourceAsStream("Font/SSF4ABUKET.ttf");
Font font = Font.loadFont(is, 30);
gc.setFont(font);
gc.setFill(Color.RED);
gc.fillText("This is a test", 10, 200);
}
}
If I try this Font in a normal Text Editor (e.g. Open Office) it works perfectly fine.
Thanks for your help in advance.
So I am trying to learn Java now that I know JavaScript and PHP. I am working in Netbeans with JavaFX and I am trying to create a program that creates 5 buttons. (This is modifying the code that comes with Netbeans when creating a new JavaFX Application.) If I change the y-argument of the scene to be less than the y of all of the buttons, it will not display the remaining buttons and it will not be able scroll down. This is what I have so far. How do I enable it to scroll down so all buttons can be seen? I know that I can just change the scene back to its old height but I want to learn about scrolling with JavaFX.
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.GridPane;
import javafx.stage.Stage;
import javax.swing.JScrollPane;
public class JavaFXApplication1 extends Application {
#Override
public void start(Stage primaryStage) {
GridPane root = new GridPane();
Button[] btn=new Button[5];
for(int i=0;i<5;i++){
btn[i] = new Button();
btn[i].setText(i+"");
GridPane.setRowIndex(btn[i],i);
root.getChildren().addAll(btn[i]);
btn[i].setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent event) {
System.out.println("This is a button");
}
});
}
Scene scene = new Scene(root, 300, 50);
primaryStage.setTitle("Hello World!");
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
Using ScrollPane to set root as:
ScrollPane sp = new ScrollPane();
sp.setContent(root);
Scene scene = new Scene(sp, 300, 50);
I'm writing a small game. And i want a pause menu over the blured game menu to be shown when esc is pressed in the middle of the game.
What I do is that i make a new scene which has a stackPane wrapping the past root and the pause menu root and then i set the opacity of the past root 0.4 .
Then when the resume button in the pause menu is clicked i change the opacity back to 1 and set the past scene on stage but then its freezed. does anyone know why? can anyone help me achieve this?
Here is the part i make the new scene and then i put this on stage:
StackPane wrapper = new StackPane();
previousScene = main.getPrimaryStage().getScene();
previousScene.getRoot().setOpacity(.4);
vBox.setId("pausedWrapper");
wrapper.getChildren().add(previousScene.getRoot());
wrapper.getChildren().add(vBox);
scene = new Scene(wrapper, 1200, 700);
return scene;
Here is the part i change it back to where it was:
resumeGame.setOnAction(event -> {
System.out.println("game resumed!");
previousScene.getRoot().setOpacity(1);
main.getPrimaryStage().setScene(previousScene);
});
But then it does not work and the opacity does not change back to normal and the strange thing is when i check the sound on box the music is played but the box does not get checked like everything works but the view is freezed.
A node cannot be part of two different scene graphs. This happens in your code to the root of previousScene, because it is part of both previousScene and the new scene you create in your first block of code. Most likely what is happening is that it is removed from the first scene when you add it to the second (though it is hard to tell from the code you posted).
Consider instead using a Popup to display the pauseMenu on top of the existing window, or just use a modal Stage with undecorated StageStyle, as in the following SSCCE:
import javafx.animation.Animation;
import javafx.animation.TranslateTransition;
import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.effect.GaussianBlur;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.Pane;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.stage.Modality;
import javafx.stage.Popup;
import javafx.stage.Stage;
import javafx.stage.StageStyle;
import javafx.util.Duration;
public class PauseExample extends Application {
#Override
public void start(Stage primaryStage) {
Rectangle rect = new Rectangle(50, 50, 50, 50);
rect.setFill(Color.CORAL);
TranslateTransition animation = createAnimation(rect);
Button pauseButton = new Button("Pause");
Pane pane = new Pane(rect);
pane.setMinSize(600, 150);
BorderPane root = new BorderPane(pane, null, null, pauseButton, new Label("This is\nthe main\nscene"));
pauseButton.setOnAction(e -> {
animation.pause();
root.setEffect(new GaussianBlur());
VBox pauseRoot = new VBox(5);
pauseRoot.getChildren().add(new Label("Paused"));
pauseRoot.setStyle("-fx-background-color: rgba(255, 255, 255, 0.8);");
pauseRoot.setAlignment(Pos.CENTER);
pauseRoot.setPadding(new Insets(20));
Button resume = new Button("Resume");
pauseRoot.getChildren().add(resume);
Stage popupStage = new Stage(StageStyle.TRANSPARENT);
popupStage.initOwner(primaryStage);
popupStage.initModality(Modality.APPLICATION_MODAL);
popupStage.setScene(new Scene(pauseRoot, Color.TRANSPARENT));
resume.setOnAction(event -> {
root.setEffect(null);
animation.play();
popupStage.hide();
});
popupStage.show();
});
BorderPane.setAlignment(pauseButton, Pos.CENTER);
BorderPane.setMargin(pauseButton, new Insets(5));
Scene scene = new Scene(root);
primaryStage.setScene(scene);
primaryStage.show();
}
private TranslateTransition createAnimation(Rectangle rect) {
TranslateTransition animation = new TranslateTransition(Duration.seconds(1), rect);
animation.setByX(400);
animation.setCycleCount(Animation.INDEFINITE);
animation.setAutoReverse(true);
animation.play();
return animation;
}
public static void main(String[] args) {
launch(args);
}
}