javafx
CSS

次の例は、CSSからカスタムNodeスタイル指定できるカスタムプロパティを追加する方法を示しています。

ここで2つのDoublePropertyがRectangleクラスに追加され、CSSのwidthとheight設定できます。

カスタムノードのスタイリングには、次のCSSを使用できます。

 StyleableRectangle {
    -fx-fill: brown;
    -fx-width: 20;
    -fx-height: 25;
    -fx-cursor: hand;
}

カスタムノード

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import javafx.beans.property.DoubleProperty;
import javafx.css.CssMetaData;
import javafx.css.SimpleStyleableDoubleProperty;
import javafx.css.StyleConverter;
import javafx.css.Styleable;
import javafx.css.StyleableDoubleProperty;
import javafx.css.StyleableProperty;
import javafx.scene.paint.Paint;
import javafx.scene.shape.Rectangle;

public class StyleableRectangle extends Rectangle {
    
    // declaration of the new properties
    private final StyleableDoubleProperty styleableWidth = new SimpleStyleableDoubleProperty(WIDTH_META_DATA, this, "styleableWidth");
    private final StyleableDoubleProperty styleableHeight = new SimpleStyleableDoubleProperty(HEIGHT_META_DATA, this, "styleableHeight");

    public StyleableRectangle() {
        bind();
    }

    public StyleableRectangle(double width, double height) {
        super(width, height);
        initStyleableSize();
        bind();
    }

    public StyleableRectangle(double width, double height, Paint fill) {
        super(width, height, fill);
        initStyleableSize();
        bind();
    }

    public StyleableRectangle(double x, double y, double width, double height) {
        super(x, y, width, height);
        initStyleableSize();
        bind();
    }
    
    private void initStyleableSize() {
        styleableWidth.set(getWidth());
        styleableHeight.set(getHeight());
    }
    
    private final static List<CssMetaData<? extends Styleable, ?>> CLASS_CSS_META_DATA;
    
    // css metadata for the width property
    // specify property name as -fx-width and
    // use converter for numbers
    private final static CssMetaData<StyleableRectangle, Number> WIDTH_META_DATA = new CssMetaData<StyleableRectangle, Number>("-fx-width", StyleConverter.getSizeConverter()) {

        @Override
        public boolean isSettable(StyleableRectangle styleable) {
            // property can be set iff the property is not bound
            return !styleable.styleableWidth.isBound();
        }

        @Override
        public StyleableProperty<Number> getStyleableProperty(StyleableRectangle styleable) {
            // extract the property from the styleable
            return styleable.styleableWidth;
        }
    };
    
    // css metadata for the height property
    // specify property name as -fx-height and
    // use converter for numbers
    private final static CssMetaData<StyleableRectangle, Number> HEIGHT_META_DATA = new CssMetaData<StyleableRectangle, Number>("-fx-height", StyleConverter.getSizeConverter()) {

        @Override
        public boolean isSettable(StyleableRectangle styleable) {
            return !styleable.styleableHeight.isBound();
        }

        @Override
        public StyleableProperty<Number> getStyleableProperty(StyleableRectangle styleable) {
            return styleable.styleableHeight;
        }
    };
    
    static {
        // combine already available properties in Rectangle with new properties
        List<CssMetaData<? extends Styleable, ?>> parent = Rectangle.getClassCssMetaData();
        List<CssMetaData<? extends Styleable, ?>> additional = Arrays.asList(HEIGHT_META_DATA, WIDTH_META_DATA);

        // create arraylist with suitable capacity
        List<CssMetaData<? extends Styleable, ?>> own = new ArrayList(parent.size()+ additional.size());

        // fill list with old and new metadata
        own.addAll(parent);
        own.addAll(additional);
        
        // make sure the metadata list is not modifiable
        CLASS_CSS_META_DATA = Collections.unmodifiableList(own); 
    }
    
    // make metadata available for extending the class
    public static List<CssMetaData<? extends Styleable, ?>> getClassCssMetaData() {
        return CLASS_CSS_META_DATA;
    }
    
    // returns a list of the css metadata for the stylable properties of the Node
    @Override
    public List<CssMetaData<? extends Styleable, ?>> getCssMetaData() {
        return CLASS_CSS_META_DATA;
    }
    
    private void bind() {
        this.widthProperty().bind(this.styleableWidth);
        this.heightProperty().bind(this.styleableHeight);
    }


    // -------------------------------------------------------------------------
    // ----------------------- PROPERTY METHODS --------------------------------
    // -------------------------------------------------------------------------
    
    public final double getStyleableHeight() {
        return this.styleableHeight.get();
    }

    public final void setStyleableHeight(double value) {
        this.styleableHeight.set(value);
    }

    public final DoubleProperty styleableHeightProperty() {
        return this.styleableHeight;
    }

    public final double getStyleableWidth() {
        return this.styleableWidth.get();
    }

    public final void setStyleableWidth(double value) {
        this.styleableWidth.set(value);
    }

    public final DoubleProperty styleableWidthProperty() {
        return this.styleableWidth;
    }

}