/*
 * The Unified Mapping Platform (JUMP) is an extensible, interactive GUI 
 * for visualizing and manipulating spatial features with geometry and attributes.
 *
 * Copyright (C) 2003 Vivid Solutions
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 * 
 * For more information, contact:
 *
 * Vivid Solutions
 * Suite #1A
 * 2328 Government Street
 * Victoria BC  V8T 5G5
 * Canada
 *
 * (250)385-6040
 * www.vividsolutions.com
 */

package com.vividsolutions.jump.workbench.ui.zoom;

import java.util.Arrays;
import java.util.Iterator;

import javax.swing.ImageIcon;
import javax.swing.JComponent;
import javax.swing.JMenuItem;

import com.vividsolutions.jts.geom.Envelope;
import com.vividsolutions.jump.geom.EnvelopeUtil;
import com.vividsolutions.jump.util.StringUtil;
import com.vividsolutions.jump.workbench.WorkbenchContext;
import com.vividsolutions.jump.workbench.model.Layer;
import com.vividsolutions.jump.workbench.plugin.AbstractPlugIn;
import com.vividsolutions.jump.workbench.plugin.EnableCheck;
import com.vividsolutions.jump.workbench.plugin.EnableCheckFactory;
import com.vividsolutions.jump.workbench.plugin.MultiEnableCheck;
import com.vividsolutions.jump.workbench.plugin.PlugInContext;
import com.vividsolutions.jump.workbench.ui.images.IconLoader;


public class ZoomToLayerPlugIn extends AbstractPlugIn {
    public ZoomToLayerPlugIn() {
    }

    public boolean execute(PlugInContext context) throws Exception {
        reportNothingToUndoYet(context);
        context.getLayerViewPanel().getViewport().zoom(EnvelopeUtil.bufferByFraction(
                envelopeOfSelectedLayers(context), 0.03));

        return true;
    }

    private Envelope envelopeOfSelectedLayers(PlugInContext context) {
        Envelope envelope = new Envelope();

        for (Iterator i = Arrays.asList(context.getLayerNamePanel()
                                               .getSelectedLayers()).iterator();
                i.hasNext();) {
            Layer layer = (Layer) i.next();
            envelope.expandToInclude(layer.getFeatureCollectionWrapper().getEnvelope());
        }

        return envelope;
    }

    public MultiEnableCheck createEnableCheck(
        final WorkbenchContext workbenchContext) {
        EnableCheckFactory checkFactory = new EnableCheckFactory(workbenchContext);

        return new MultiEnableCheck().add(checkFactory.createWindowWithLayerNamePanelMustBeActiveCheck())
                                     .add(checkFactory.createAtLeastNLayersMustBeSelectedCheck(
                1)).add(new EnableCheck() {
                public String check(JComponent component) {
                    ((JMenuItem) component).setText(getName() +
                        StringUtil.s(
                            workbenchContext.getLayerNamePanel()
                                            .getSelectedLayers().length));

                    return null;
                }
            });
    }
    
    public static final ImageIcon ICON = IconLoader.icon("zoom.gif");

}