parubok / swing-fx-properties Goto Github PK

import io.github.parubok.swingfx.beans.property.ObjectProperty;
import io.github.parubok.swingfx.beans.property.SimpleObjectProperty;
import io.github.parubok.swingfx.beans.value.ChangeListener;

import javax.swing.*;
import javax.swing.event.ListSelectionListener;
import java.util.Objects;

import static io.github.parubok.fxprop.ClientProps.PROP_SELECTED_ITEM;

public abstract class SelectedListItemPropertyImpl {
    private static final ListSelectionListener ITEM_LISTENER = e -> {
        JList<?> list = (JList<?>) e.getSource();
        ObjectProperty p = (ObjectProperty) list.getClientProperty(PROP_SELECTED_ITEM);
        if (!Objects.equals(list.getSelectedValue(), p.get())) {
            p.set(list.getSelectedValue());
        }
    };
    private static final ChangeListener FX_PROP_LISTENER = (observable, oldValue, newValue) -> {
        ObjectProperty<?> p = (ObjectProperty) observable;
        JList<?> list = (JList) p.getBean();
        if (!Objects.equals(newValue, list.getSelectedValue())) {
            list.setSelectedValue(newValue,false);
        }
    };
    static <E> ObjectProperty<E> getProperty(JList<E> list) {
        Objects.requireNonNull(list, "list");
        ObjectProperty<E> p = (ObjectProperty) list.getClientProperty(PROP_SELECTED_ITEM);
        if (p == null) {
            p = new SimpleObjectProperty<>(list, "selectedItem", list.getSelectedValue());
            list.putClientProperty(PROP_SELECTED_ITEM, p);
            list.addListSelectionListener(ITEM_LISTENER);
            p.addListener(FX_PROP_LISTENER);
        }
        return p;
    }
}

public abstract class ExtraSwingPropertySupport {

    public static <E> ObjectProperty<E> selectedItemProperty(JList<E> list) {
        return SelectedListItemPropertyImpl.getProperty(list);
    }

}