I have a stack pane that when the mouse enters, I create a pane, stick some text in it, and display it near the mouse.
StatisticsController.java
stackPane.setOnMouseEntered(event -> {
Pane pane = new Pane();
Text text = new Text("Example Text");
//Add the text to the pane and set it near the mouse
pane.getChildren().add(text);
pane.setLayoutY(event.getSceneY() - 50);
pane.setLayoutX(event.getSceneX() - 100);
//add the style class to give it a blueBG background
pane.getStyleClass().add("blueBG");
// add it too our root
getRoot().getChildren().add(pane);
});
As you can see below when the Pane and text appear when I roll over the stackPane (the black circle and question mark in the image).
However it doesn't have the blue background I'm looking for.
What I find strange is if instead of adding it to the root and I add it to an existing Vbox, it styles correctly (Here I roll over the same stackPane):
So:
//Styles Correctly
getInfoBox().getChildren().add(pane);
// Adds but does not style
getRoot().getChildren().add(pane);
Some things that may be worth noting:
1)getInfoBox() is a static getter. I have multiple controllers which extend a MasterController which has static instance variables to things all controllers would want to be able to access - like the infoBox, to display information.
2)The root is a BorderPane made in the Main class:
Main.java
//Create the root
BorderPane root = new BorderPane();
// I've cut it out to save space but this repeats 4 times to set
//an .fxml file for the top, left, right and bottom of the borderPane ///
FXMLLoader headerLoader = new FXMLLoader(getClass().getResource("/view/header.fxml"));
Parent headerRoot = headerLoader.load();
root.setTop(headerRoot);
//------------------------------------------//
//Set the static reference in the MasterController
MasterController.setRoot(root);
Scene scene = new Scene(root,1366,768);
primaryStage.setScene(scene);
primaryStage.show();
3) The css files are all declared in the .fxml files using Scene Builder. The top, bottom, left, right .fxml files all have the same css (main.css). So does the statistic.fxml which is loaded on button click into the center (you can see in the image)
Suggestion: Could it be because the CSS is not defined for the Scene or BorderPane itself, it only applies to nodes added into the borderPane sections? If so how would I go about letting the enter Scene/Stage use the same css and would that negate adding in the css to each .fxml?
Edit:
When adding this code to the main to apply the CSS to the scene:
Scene scene = new Scene(root,1366,768);
scene.getStylesheets().add(getClass().getResource("/css/main.css").toExternalForm());
primaryStage.setScene(scene);
primaryStage.show();
I get this:
So the CSS for the text is now working, but not for the Pane? I have no idea why this might happen.
// ---- REPRODUCTION -- //
Main.java
package sample;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;
public class Main extends Application {
#Override
public void start(Stage primaryStage) throws Exception{
BorderPane bp = new BorderPane();
MasterController.setRoot(bp);
Parent left = FXMLLoader.load(getClass().getResource("left.fxml"));
Parent right = FXMLLoader.load(getClass().getResource("right.fxml"));
bp.setLeft(left);
bp.setRight(right);
Scene scene = new Scene(bp, 600, 400);
scene.getStylesheets().add(getClass().getResource("main.css").toExternalForm());
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
MasterController.java
package sample;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.VBox;
public class MasterController {
private static VBox rightBox;
private static BorderPane root;
public static VBox getRightBox() {
return rightBox;
}
public static void setRightBox(VBox rightBox) {
MasterController.rightBox = rightBox;
}
public static BorderPane getRoot() {
return root;
}
public static void setRoot(BorderPane root) {
MasterController.root = root;
}
}
LeftController.java
package sample;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import java.io.IOException;
public class LeftController extends MasterController {
#FXML
public void loadCenter(ActionEvent event) {
try {
FXMLLoader loader = new FXMLLoader(getClass().getResource("center.fxml"));
Parent center = loader.load();
getRoot().setCenter(center);
} catch (IOException e){
e.printStackTrace();
}
}
}
CenterController.java
package sample;
import javafx.application.Platform;
import javafx.fxml.FXML;
import javafx.scene.layout.Pane;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.VBox;
import javafx.scene.text.Text;
public class CenterController extends MasterController {
#FXML
private VBox center;
public void initialize() {
Platform.runLater(this::build);
}
public void build() {
center.getChildren().add(new Text("loaded"));
StackPane stackPane = new StackPane();
Text text = new Text("ROLL OVER");
stackPane.getChildren().add(text);
center.getChildren().add(stackPane);
stackPane.setOnMouseEntered(event -> {
getRightBox().getChildren().clear();
Pane pane1 = new Pane();
Text exampleText1 = new Text("Example Text");
pane1.getStyleClass().add("blueBG");
Pane pane2 = new Pane();
Text exampleText2 = new Text("Example Text");
pane2.getStyleClass().add("blueBG");
pane1.getChildren().add(exampleText1);
pane2.getChildren().add(exampleText2);
pane1.setLayoutY(event.getSceneY() + 40);
pane1.setLayoutX(event.getSceneX() - 40);
getRoot().getChildren().add(pane1);
getRightBox().getChildren().add(pane2);
});
}
}
RightController.java
package sample;
import javafx.application.Platform;
import javafx.fxml.FXML;
import javafx.scene.layout.VBox;
public class RightController extends MasterController {
#FXML
private VBox rightBox;
public void initialize() {
setRightBox(rightBox);
}
}
left.fxml
<?xml version="1.0" encoding="UTF-8"?>
<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<VBox maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="200.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="sample.LeftController">
<children>
<Button mnemonicParsing="false" onAction="#loadCenter" prefHeight="38.0" prefWidth="200.0" text="Click me to load center" />
</children>
</VBox>
center.fxml
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.text.*?>
<?import javafx.scene.layout.*?>
<VBox fx:id="center" alignment="TOP_CENTER" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="200.0" stylesheets="#main.css" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="sample.CenterController">
<children>
<Text strokeType="OUTSIDE" strokeWidth="0.0" text="Center" />
</children>
</VBox>
right.fxml
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.text.*?>
<?import javafx.scene.layout.*?>
<VBox fx:id="rightBox" alignment="TOP_CENTER" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="200.0" stylesheets="#main.css" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="sample.RightController">
<children>
<Text strokeType="OUTSIDE" strokeWidth="0.0" text="Right Box" />
</children>
</VBox>
main.css
.blueBG {
-fx-background-color: aqua;
}
You should get the following result. You can see the pane is being styled correctly when added to the right, but not when added too the root.
BorderPane only applies layout to the center, left, right, top and bottom children. It's however the parent of a layout (or the scene in case of a root) that sets the size of a Region during a layout pass (or not, like in this case).
The result is that the style is applied to the Pane, but the size of the Pane remains 0. You can verify this by adding
pane1.resize(100, 100);
to the event handler to set the size of the pane.
You need to use a different kind of layout as parent for pane1's size to become non-empty or resize it yourself.
Related
I am currently migrating all my .form files over to .fxml and I'm having a bit trouble loading another page within the same window.
With .form method I was able to establish a card layout and switch it within that.
What I would do is create a card layout and have the forms load in there.
I created a few test .fxml and some basic code. It loads the second one but in a new window and I'm trying to avoid that and load it within the same window.
index.fxml
<?xml version="1.0" encoding="UTF-8"?>
<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="480.0" prefWidth="320.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="Test">
<children>
<Button id="btnbuy" fx:id="btnbuy" layoutX="134.0" layoutY="2.0" mnemonicParsing="false" onAction="#loadSecondFxml" text="Purchase" />
<Button id="btnSell" fx:id="btnsell" layoutX="140.0" layoutY="454.0" mnemonicParsing="false" text="Sell" />
</children>
</AnchorPane>
MainPage.fxml
<?xml version="1.0" encoding="UTF-8"?>
<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<AnchorPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="480.0" prefWidth="320.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="Test">
<children>
<Pane layoutX="6.0" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="480.0" prefWidth="320.0">
<children>
<Label layoutX="146.0" layoutY="232.0" text="You got here" />
</children></Pane>
</children>
</AnchorPane>
Test.java
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.stage.Stage;
public class Test extends Application {
private MainPage parentForm;
//private Panel panel;
public Button btnbuy;
public Button btnsell;
public Test(){
}
public void start(Stage primaryStage) throws Exception{
Parent root = FXMLLoader.load(getClass().getResource("Index.fxml"));
primaryStage.setTitle("Hello World");
primaryStage.setScene(new Scene(root, 320, 480));
primaryStage.show();
}
public void loadSecondFxml() throws Exception{
Stage primaryStage = new Stage();
Parent root = FXMLLoader.load(getClass().getResource("MainPage.fxml"));
primaryStage.setTitle("Hi");
primaryStage.setScene(new Scene(root, 320, 480));
primaryStage.show();
}
public static void main(String args[]){
launch(args);
}
}
I know it has something to do with the setscene portion. But I'm having trouble trying to get the syntax right.
There are multiple ways of doing this. Which one works best for you depends on your needs:
Replacing the root
By replacing the root you can replace all the contents shown in a window.
#Override
public void start(Stage primaryStage) {
final Region r1 = new Region();
r1.setStyle("-fx-background-color: yellow;");
final Region r2 = new Region();
r2.setStyle("-fx-background-color: blue;");
final Scene scene = new Scene(r1);
scene.setOnMouseClicked(evt -> {
scene.setRoot(scene.getRoot() == r1 ? r2 : r1); // swap roots
});
primaryStage.setScene(scene);
primaryStage.show();
}
Modifying part of the scene
By modifying a parent in the scene you can change the display.
BorderPane
This layout allows you to easily replace it's (up to) 5 nodes:
#Override
public void start(Stage primaryStage) {
final Region r1 = new Region();
r1.setStyle("-fx-background-color: yellow;");
final Region r2 = new Region();
r2.setStyle("-fx-background-color: blue;");
final BorderPane root = new BorderPane(r1);
Button btn = new Button("swap");
btn.setOnAction(evt -> {
root.setCenter(root.getCenter() == r1 ? r2 : r1);
});
root.setTop(btn);
final Scene scene = new Scene(root, 400, 400);
primaryStage.setScene(scene);
primaryStage.show();
}
Modifying the child list of some other layout
This can be a bit more complex than using BorderPane, but Panes and Group allow you to modify the children list to modify the layout:
#Override
public void start(Stage primaryStage) {
final Region r1 = new Region();
r1.setStyle("-fx-background-color: yellow;");
VBox.setVgrow(r1, Priority.ALWAYS);
final Region r2 = new Region();
r2.setStyle("-fx-background-color: blue;");
VBox.setVgrow(r2, Priority.ALWAYS);
final VBox root = new VBox();
Button btn = new Button("swap");
btn.setOnAction(evt -> {
root.getChildren().set(1, root.getChildren().get(1) == r1 ? r2 : r1);
});
root.getChildren().addAll(btn, r1);
final Scene scene = new Scene(root, 400, 400);
primaryStage.setScene(scene);
primaryStage.show();
}
Something like TabPane may also suit your needs.
Using something like this with fxmls requires you to provide access to the object managing the replacement. You can read about this topic here: Passing Parameters JavaFX FXML
You shouldn't use the Application class as controller class though. This violates the single responsibility principle. Also you create a new instance of the class every time a fxml with the class specified as value of the fx:controller attribute is loaded. The Application class is supposed to be the "entry point" of your program.
I have created a new JavaFx project.
In the project I have a Main class, a Controller class and a design file.
When I click on "New products" I want to load a new fxml file named new_product.fxml.
However I get a error when I click the "New product" button:
Caused by: java.lang.NullPointerException
at sample.Main.changeScene(Main.java:33)
at sample.Controller.buttonNewProductOnMouseClicked(Controller.java:21)
In Main.java line 33 is the primaryStage. Looks like my controller can't access it?
package sample;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;
import java.io.IOException;
public class Main extends Application {
Stage primaryStage;
#Override
public void start(Stage primaryStage) throws Exception{
this.primaryStage = primaryStage;
Parent root = FXMLLoader.load(getClass().getResource("sample.fxml"));
Scene primaryScene = new Scene(root, 300, 275);
primaryStage.setScene(primaryScene);
primaryStage.show();
}
public void changeScene(String fxml){
Parent pane = null;
try {
pane = FXMLLoader.load(getClass().getResource(fxml));
} catch (IOException e) {
e.printStackTrace();
}
Scene scene = new Scene( pane );
primaryStage.setScene(scene);
}
public static void main(String[] args) {
launch(args);
}
}
My design file
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.geometry.Insets?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.layout.BorderPane?>
<?import javafx.scene.layout.HBox?>
<BorderPane xmlns="http://javafx.com/javafx/8.0.121" xmlns:fx="http://javafx.com/fxml/1" fx:controller="sample.Controller">
<top>
<HBox prefHeight="100.0" prefWidth="200.0" BorderPane.alignment="CENTER">
<children>
<Button fx:id="buttonProducts" mnemonicParsing="false" onMouseClicked="#buttonProductsOnMouseClicked" text="Products" />
<Button fx:id="buttonNewProduct" mnemonicParsing="false" onMouseClicked="#buttonNewProductOnMouseClicked" text="New products">
<HBox.margin>
<Insets left="5.0" />
</HBox.margin></Button>
</children>
</HBox>
</top>
<center>
<Label text="Label" BorderPane.alignment="CENTER" />
</center>
</BorderPane>
The Controller class for the design file
package sample;
import javafx.fxml.FXML;
import javafx.scene.control.Button;
public class Controller {
#FXML
private Button buttonProducts;
#FXML
private Button buttonNewProduct;
public void buttonProductsOnMouseClicked(javafx.scene.input.MouseEvent mouseEvent) {
buttonProducts.setText("You have clicked on me!");
}
public void buttonNewProductOnMouseClicked(javafx.scene.input.MouseEvent mouseEvent) {
buttonNewProduct.setText("You have clicked on me!");
Main mainclass = new Main();
mainclass.changeScene("new_product/new_product.fxml");
}
}
I have seen a similar question being asked, however my problem is that I want the stage to maintain full screen mode during the entirety of the scene change ie not simply adding stage.setFullScreen(true) at the end of it, which causes a momentary but very noticeable exit from full screen. Hiding the stage before changing scenes doesn't really help either, as there is a noticeable disappearance . Here's my code:
Main:
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 {
#Override
public void start(Stage primaryStage) throws Exception{
Parent root = FXMLLoader.load(getClass().getResource("sample.fxml"));
primaryStage.setTitle("Hello World");
primaryStage.setScene(new Scene(root));
primaryStage.setFullScreen(true);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
Controller:
package sample;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.layout.AnchorPane;
import javafx.stage.Stage;
public class Controller {
#FXML
private AnchorPane pane;
#FXML
void doSomething(ActionEvent event) throws Exception {
Stage stage = (Stage) pane.getScene().getWindow();
Parent parent = FXMLLoader.load(getClass().getResource("sample2.fxml"));
Scene scene = new Scene(parent);
stage.setScene(scene);
stage.setFullScreen(true);
stage.show();
}
}
Sample:
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.layout.AnchorPane?>
<AnchorPane fx:id="pane" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-
Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0"
xmlns="http://javafx.com/javafx/8.0.111" xmlns:fx="http://javafx.com/fxml/1"
fx:controller="sample.Controller">
<children>
<Button layoutX="180.0" layoutY="188.0" mnemonicParsing="false"
onAction="#doSomething" prefHeight="25.0" prefWidth="241.0" text="Do Something"
/>
</children>
</AnchorPane>
Sample2
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.layout.AnchorPane?>
<AnchorPane fx:id="pane" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-
Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" style="-fx-background-color: blue;"
xmlns="http://javafx.com/javafx/8.0.111" xmlns:fx="http://javafx.com/fxml/1"
fx:controller="sample.Controller">
<children>
<Button layoutX="180.0" layoutY="188.0" mnemonicParsing="false"
onAction="#doSomething" prefHeight="25.0" prefWidth="241.0" text="Do Something"
/>
</children>
</AnchorPane>
As you can see, if you run the code and press the button, there is a momentary exit from full screen. Is there any way to fix this, other than using the same fxml file?
Thanks a lot.
I didn't clearly understood what you are saying. I think you need a stage of size equals to Computer screen resolution and switch between the two screens. If yes then the following files will help you do so. If you want to come back to first scene from second scene then keep another button to load the first scene or keep a static variable and switch between the scenes by incrementing the variable and show the scene based on odd or even. Like for odd value of the variable show first scene and for even values show second scene.
Other process is getting the children of the stage. This gives you a ObservableList. Now clear the list and then add the respective scene to the list and show the stage.
Main class:
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.geometry.Rectangle2D;
import javafx.scene.Group;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Screen;
import javafx.stage.Stage;
public class Main extends Application {
#Override
public void start(Stage primaryStage) throws Exception{
Parent root = FXMLLoader.load(getClass().getResource("sample.fxml"));
primaryStage.setTitle("Hello World");
Scene scene = new Scene(root, 500, 200);
primaryStage.setScene(scene);
Rectangle2D primaryScreenBounds = Screen.getPrimary().getVisualBounds();
//set Stage boundaries to visible bounds of the main screen
primaryStage.setX(primaryScreenBounds.getMinX());
primaryStage.setY(primaryScreenBounds.getMinY());
primaryStage.setWidth(primaryScreenBounds.getWidth());
primaryStage.setHeight(primaryScreenBounds.getHeight());
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
Controller Class:
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.geometry.Rectangle2D;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.layout.AnchorPane;
import javafx.stage.Screen;
import javafx.stage.Stage;
public class Controller {
#FXML
private AnchorPane pane;
#FXML
void doSomething(ActionEvent event) throws Exception {
Stage stage = (Stage) pane.getScene().getWindow();
Parent parent = FXMLLoader.load(getClass().getResource("sample2.fxml"));
Scene scene = new Scene(parent, 500, 200);
stage.setScene(scene);
Rectangle2D primaryScreenBounds = Screen.getPrimary().getVisualBounds();
//set Stage boundaries to visible bounds of the main screen
stage.setX(primaryScreenBounds.getMinX());
stage.setY(primaryScreenBounds.getMinY());
stage.setWidth(primaryScreenBounds.getWidth());
stage.setHeight(primaryScreenBounds.getHeight());
stage.show();
}
}
I could not find anything on the topic anywhere i looked. I would like to add a rectangle to my AnchorPane (anchorPaneOne) that is inside my ScrollPane (scrollPane) but whatever i see to do i keep getting errors.
Here is my code:
Main Class:
package application;
import javafx.application.Application;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.ScrollPane;
import javafx.scene.layout.AnchorPane;
import javafx.scene.shape.Rectangle;
import javafx.stage.Stage;
public class Main extends Application {
#FXML
ScrollPane scrollPane;
#FXML
AnchorPane main;
#FXML
AnchorPane anchorPaneOne;
public void start(Stage primaryStage) {
try {
Parent root = FXMLLoader.load(getClass().getResource("/fxml/Main.fxml"));
Scene scene = new Scene(root,600,400);
primaryStage.setScene(scene);
primaryStage.setTitle("Stack Overflow Example");
primaryStage.show();
Rectangle r = new Rectangle();
//It will not let me do anchorPaneOne.getChildren().add(r);
} catch(Exception e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
launch(args);
}
}
Main.fxml:
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.control.*?>
<?import java.lang.*?>
<?import javafx.scene.layout.*?>
<AnchorPane fx:id="main" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1">
<children>
<ScrollPane fx:id="scrollPane" prefHeight="400.0" prefWidth="600.0">
<content>
<AnchorPane fx:id="anchorPaneOne" minHeight="0.0" minWidth="0.0" prefHeight="800.0" prefWidth="585.0" />
</content>
</ScrollPane>
</children>
</AnchorPane>
Any assistance would be appreciated.
Thanks
The loader needs to know where to inject the instances to - without the field anchorPaneOne can't be instantiated and remains null. That's done by the controller property which must be set before actually loading the ui:
// create a loader
FXMLLoader loader = new FXMLLoader(getClass().getResource(resource));
// set this instance as its controller
loader.setController(this);
// load the ui
Parent root = loader.load();
Scene scene = new Scene(root, 600, 400);
primaryStage.setScene(scene);
primaryStage.setTitle("Stack Overflow Example");
primaryStage.show();
Rectangle r = new Rectangle(100, 100);
// now the field is instantiated and can be accessed without NPE
anchorPaneOne.getChildren().add(r);
Is there a way to draw a radial gradient from black to transparent over the entire scene of a JavaFX stage?
I want to achieve something like this:
Here is a quick answer which uses a StackPane as the scene root to allow addition of an overlay with a radial gradient background varying from black to transparent.
You can adjust the radial gradient colors or radius, e.g. make the inner color Color.BLACK.deriveColor(0, 1, 1, 0.2), to change the amount of highlight and intensity in the effect.
Gradients such as this can be set in CSS as well, so you could use CSS rather than Java code to style the effect if you wished.
The output of this implementation suffers a little bit from banding of the radial gradient (not sure how to improve that further), but it's kind of OK depending on your tolerance.
import javafx.application.Application;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.effect.BoxBlur;
import javafx.scene.layout.*;
import javafx.scene.paint.*;
import javafx.stage.Stage;
// java 8
// click on the scene to place a shaded lens effect over the scene.
public class ShadedScene extends Application {
#Override
public void start(Stage stage) {
StackPane layout = new StackPane(
new Label("Click to shade/unshade")
);
layout.setPrefSize(400, 300);
Scene scene = new Scene(layout);
makeShadeable(scene);
stage.setScene(scene);
stage.show();
}
/**
* Applies a lens effect gradient to a scene root node.
* The effect is kind of like a flashlight shining against the wall in the dark.
*
* For the gradient to be applied, the scene's root must be defined and a Pane
* to which the effect can added and removed as a child.
*
* #param scene the scene to have the effect applied.
*/
private void makeShadeable(Scene scene) {
if (scene.getRoot() == null ||
!(scene.getRoot() instanceof Pane)) {
return;
}
Pane shade = new Pane();
RadialGradient shadePaint = new RadialGradient(
0, 0, 0.5, 0.5, 1, true, CycleMethod.NO_CYCLE,
new Stop(1, Color.BLACK),
new Stop(0, Color.TRANSPARENT)
);
shade.setBackground(
new Background(
new BackgroundFill(
shadePaint, null, new Insets(-10)
)
)
);
// blur helps reduce visible banding of the radial gradient.
shade.setEffect(new BoxBlur(5, 5, 3));
Pane root = (Pane) scene.getRoot();
scene.setOnMouseClicked(event -> {
if (root.getChildren().contains(shade)) {
root.getChildren().remove(shade);
} else {
root.getChildren().add(shade);
}
});
}
public static void main(String[] args) {
launch(args);
}
}
There are other ways to accomplish something similar to the desired effect. For example the technique below applies an inner shadow and color adjustment to the root pane directly, so it requires no additional nodes.
private void makeShadeableByInnerShadow(Scene scene) {
InnerShadow shade = new InnerShadow();
shade.setWidth(120);
shade.setHeight(120);
shade.setInput(new ColorAdjust(0, 0, -0.3, 0));
Parent root = scene.getRoot();
scene.setOnMouseClicked(event -> {
if (root.getEffect() == null) {
root.setEffect(shade);
} else {
root.setEffect(null);
}
});
}
Considering your example, you could post this on http://pt.stackoverflow.com. as most of your interface is in Brazilian Portuguese.
The answer is exactly what jewelsea posted. But as I was also answering when I got notified that there was an answer, I posted mine as well.
Test.java
package br;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;
public class Test extends Application {
public static Stage thisStage;
#Override
public void start(Stage stage) throws Exception {
thisStage = stage;
Parent root = FXMLLoader.load(getClass().getResource("doc.fxml"));
Scene scene = new Scene(root);
scene.getStylesheets().add(getClass().getResource("style.css").toExternalForm());
stage.setScene(scene);
stage.setTitle("Happy Client - Overlay");
stage.show();
}
public static void main(String[] args) {
launch(args);
}
}
TestController.java
package br;
import java.net.URL;
import java.util.ResourceBundle;
import javafx.event.EventHandler;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.Pane;
public class TestController implements Initializable{
#FXML Pane mainPane;
#FXML Pane overlayPane;
#Override
public void initialize(URL arg0, ResourceBundle arg1) {
overlayPane.getStyleClass().add("grad");
overlayPane.toFront();
overlayPane.addEventHandler(MouseEvent.MOUSE_PRESSED,
new EventHandler<MouseEvent>(){
#Override
public void handle(MouseEvent arg0) {
overlayPane.toBack();
}
});
}
}
doc.fxml
<?xml version="1.0" encoding="UTF-8"?>
<?import java.lang.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.shape.*?>
<StackPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="br.TestController">
<children>
<Pane fx:id="mainPane" prefHeight="98.0" prefWidth="600.0">
<children>
<TableView layoutX="-2.0" layoutY="99.0" prefHeight="300.0" prefWidth="600.0">
<columns>
<TableColumn prefWidth="75.0" text="Nome" />
<TableColumn prefWidth="75.0" text="RG" />
<TableColumn prefWidth="75.0" text="CPF" />
<TableColumn prefWidth="75.0" text="Idade" />
</columns>
</TableView>
<Label layoutX="162.0" layoutY="41.0" style="-fx-font-size: 32;" text="Informe o cliente" />
<Line endX="500.0" layoutX="100.0" layoutY="98.0" startX="-100.0" />
</children>
</Pane>
<Pane fx:id="overlayPane" opacity="0.8" prefHeight="200.0" prefWidth="200.0" />
</children>
</StackPane>
style.css
.grad{
-fx-padding: 40;
-fx-background-color: radial-gradient(center 50% 50%, radius 140%, rgba(200,200,200,70) 5%,rgba(0,0,0,100) 35%);
}
Note that you will have to use a StackPane and not other such as AnchorPane because if you set the style directly on an AnchorPane the style would not work for your elements above it such as your table, as you may see below: