ContextMenu.java

package husacct.graphics.presentation.menubars;

import java.awt.Component;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;

import javax.swing.ImageIcon;
import javax.swing.JMenuItem;
import javax.swing.JPopupMenu;

import husacct.ServiceProvider;
import husacct.common.Resource;
import husacct.common.locale.ILocaleService;
import husacct.graphics.presentation.UserInputListener;

public class ContextMenu extends JPopupMenu {
	private static final long serialVersionUID = -6033808567664371902L;
	protected ILocaleService localeService = ServiceProvider.getInstance().getLocaleService();

	private ArrayList<UserInputListener> listeners = new ArrayList<UserInputListener>();

	private JMenuItem zoomIn;
	private JMenuItem zoomOut;
	private JMenuItem hide;
	private JMenuItem restore;

	private boolean hasSelection = false;
	private boolean hasHiddenFigures = false;
	private boolean canZoomout = false;

	public ContextMenu() {

		ImageIcon icon;

		icon = new ImageIcon(Resource.get(Resource.ICON_ZOOM));
		zoomIn = new JMenuItem(localeService.getTranslatedString("ZoomIn"), icon);
		add(zoomIn);

		icon = new ImageIcon(Resource.get(Resource.ICON_BACK));
		zoomOut = new JMenuItem(localeService.getTranslatedString("ZoomOut"), icon);
		add(zoomOut);

		addSeparator();

		icon = new ImageIcon(Resource.get(Resource.ICON_FIGURES_HIDE));
		hide = new JMenuItem(localeService.getTranslatedString("HideModules"), icon);
		add(hide);

		icon = new ImageIcon(Resource.get(Resource.ICON_FIGURES_SHOW));
		restore = new JMenuItem(localeService.getTranslatedString("RestoreHiddenModules"), icon);
		add(restore);

		hookupEventHandlers();
	}

	public void addListener(UserInputListener listener) {
		listeners.add(listener); // GraphicsPresentationController
	}

	private void hookupEventHandlers() {
		zoomIn.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				triggerZoomIn();
			}
		});

		zoomOut.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				triggerZoomOut();
			}
		});

		hide.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				triggerHideModules();
			}
		});

		restore.addActionListener(new ActionListener() {
			@Override
			public void actionPerformed(ActionEvent e) {
				triggerRestoreModules();
			}
		});
	}

	public void removeListener() {
		listeners.clear();
	}

	public void setCanZoomout(boolean newValue) {
		canZoomout = newValue;
	}

	public void setHasHiddenFigures(boolean newValue) {
		hasHiddenFigures = newValue;
	}

	public void setHasSelection(boolean newValue) {
		hasSelection = newValue;
	}

	@Override
	public void show(Component invoker, int x, int y) {
		updateMenuItems();
		super.show(invoker, x, y);
	}

	protected void triggerHideModules() {
		for (UserInputListener l : listeners)
			l.moduleHide();
	}

	protected void triggerRestoreModules() {
		for (UserInputListener l : listeners)
			l.moduleRestoreHiddenModules();
	}

	protected void triggerZoomIn() {
		for (UserInputListener l : listeners)
			l.zoomIn();
	}

	private void triggerZoomOut() {
		for (UserInputListener l : listeners)
			l.zoomOut();
	}

	private void updateMenuItems() {
		hide.setEnabled(hasSelection);
		zoomIn.setEnabled(hasSelection);
		restore.setEnabled(hasHiddenFigures);
		zoomOut.setEnabled(canZoomout);
	}
}