se.wfh.libs.common.gui.widgets.WComboBox Maven / Gradle / Ivy

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Some helper classes i needed for several projects (GUI / Swing parts)

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package se.wfh.libs.common.gui.widgets;

import java.util.Arrays;
import java.util.Collection;

import javax.swing.DefaultComboBoxModel;
import javax.swing.JComboBox;

import se.wfh.libs.common.gui.exceptions.ChangeVetoException;
import se.wfh.libs.common.gui.widgets.base.AbstractWComponent;
import se.wfh.libs.common.gui.widgets.base.EnumSelection;

public class WComboBox extends AbstractWComponent> implements
		EnumSelection {
	private static final long serialVersionUID = 1L;

	private final DefaultComboBoxModel model;

	public WComboBox(final Collection items) {
		this(items, null);
	}

	@SuppressWarnings("unchecked")
	public WComboBox(final Collection items, E value) {
		super(new JComboBox<>(), value);

		JComboBox component = getComponent();

		model = new DefaultComboBoxModel<>();
		if (items != null) {
			items.forEach(item -> model.addElement(item));
		}
		component.setModel(model);

		setValue(value);
		component.addActionListener(event -> setValue((E) model.getSelectedItem()));
	}

	public WComboBox(final E[] items) {
		this(Arrays.asList(items));
	}

	public void addElement(final E element) {
		model.addElement(element);
	}

	public void clear() {
		model.removeAllElements();
	}

	@Override
	protected void currentValueChanging(E newVal) throws ChangeVetoException {
		getComponent().setSelectedItem(newVal);
	}

	@Override
	public boolean isReadonly() {
		return !getComponent().isEnabled();
	}

	public void removeElement(final E element) {
		model.removeElement(element);
	}

	@Override
	public void setReadonly(boolean readonly) {
		getComponent().setEnabled(!readonly);
	}
}