CODEWITHSUNDEEP
javajavafx
Yjuq
Yjuq

Reputation: 51

Use Custom Control in FXML Document

How can I use a custom control in a FXML document? I know here are many answers about that, but all examples extends from existing controls like buttons, labels or even panels. But I extend from the 'Control' class and it don't work.

public class MyControl extends Control {
}

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.Scene?>
<?import javafx.scene.layout.Pane?>
<?import .MyControl?>

<Scene xmlns:fx="http://javafx.com/fxml/1">
    <width>800</width>
    <height>600</height>

    <Pane fx:id="pane">
        <MyControl></MyControl>
    </Pane>
</Scene>

If I extend from any other control like a button or something, it works fine. What I need to do?

Upvotes: 3

Views: 140

Answers (1)

turikhay
turikhay

Reputation: 297

Basically, in JavaFX Control don't work like that, it always need a Skin<C> in order to render. Try this:

import javafx.scene.control.Control;
import javafx.scene.control.Skin;
import javafx.scene.control.SkinBase;
import javafx.scene.layout.Pane;

public class MyControl extends Control {
    @Override
    protected Skin<?> createDefaultSkin() {
        return new SkinBase<MyControl>(this) {
            {
                Pane pane = new Pane();
                pane.prefWidthProperty().bind(getSkinnable().prefWidthProperty());
                pane.prefHeightProperty().bind(getSkinnable().prefHeightProperty());
                pane.setStyle("-fx-background-color: red");
                getChildren().add(pane);
            }
        };
    }
}

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.Scene?>
<?import javafx.scene.layout.Pane?>
<?import MyControl?>

<Scene xmlns:fx="http://javafx.com/fxml/1">
    <width>800</width>
    <height>600</height>

    <Pane fx:id="pane">
        <MyControl prefWidth="500" prefHeight="500"></MyControl>
    </Pane>
</Scene>

But this is just an example. You should explore better ways to create custom Controls, check for createDefaultSkin() in regular classes like Button and Checkbox.

Upvotes: 1

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