org.polymap.core.project.ui.properties.EnvelopPropertySource.java Source code

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Here is the source code for org.polymap.core.project.ui.properties.EnvelopPropertySource.java

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/* 
 * polymap.org
 * Copyright 2012, Polymap GmbH. All rights reserved.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software 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
 * Lesser General Public License for more details.
 */
package org.polymap.core.project.ui.properties;

import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.text.NumberFormat;

import org.geotools.geometry.jts.ReferencedEnvelope;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import org.eclipse.ui.views.properties.IPropertyDescriptor;
import org.eclipse.ui.views.properties.IPropertySource;
import org.polymap.core.runtime.Polymap;

/**
 * 
 *
 * @author <a href="http://www.polymap.de">Falko Brutigam</a>
 */
public class EnvelopPropertySource implements IPropertySource {

    private static Log log = LogFactory.getLog(EnvelopPropertySource.class);

    // instance *******************************************

    private ReferencedEnvelope envelop;

    private double minx, miny, maxx, maxy;

    protected final NumberFormat nf;

    /** True if editable. */
    private PropertyChangeListener listener;

    public EnvelopPropertySource(ReferencedEnvelope envelop) {
        this.envelop = envelop;

        nf = NumberFormat.getInstance(Polymap.getSessionLocale());
        nf.setMaximumFractionDigits(6);
    }

    public boolean isEditable() {
        return listener != null;
    }

    public EnvelopPropertySource setEditable(PropertyChangeListener listener) {
        this.listener = listener;
        return this;
    }

    public IPropertyDescriptor[] getPropertyDescriptors() {
        return new IPropertyDescriptor[] {
                new NumberPropertyDescriptor("minx", "MinX").setFormat(nf).setEditable(isEditable()),
                new NumberPropertyDescriptor("miny", "MinY").setFormat(nf).setEditable(isEditable()),
                new NumberPropertyDescriptor("maxx", "MaxX").setFormat(nf).setEditable(isEditable()),
                new NumberPropertyDescriptor("maxy", "MaxY").setFormat(nf).setEditable(isEditable()) };
    }

    public Object getEditableValue() {
        if (envelop != null) {
            return nf.format(envelop.getMinX()) + " : " + nf.format(envelop.getMaxX()) + " - "
                    + nf.format(envelop.getMinY()) + " : " + nf.format(envelop.getMaxY());
        } else {
            return "-";
        }
    }

    public Object getPropertyValue(Object id) {
        if (id.equals("minx")) {
            return minx = envelop.getMinX();
        } else if (id.equals("miny")) {
            return miny = envelop.getMinY();
        } else if (id.equals("maxx")) {
            return maxx = envelop.getMaxX();
        } else if (id.equals("maxy")) {
            return maxy = envelop.getMaxY();
        }
        return null;
    }

    public void setPropertyValue(Object id, Object value) {
        log.info("id=" + id + ", value=" + value);
        if (id.equals("minx")) {
            minx = ((Number) value).doubleValue();
        } else if (id.equals("miny")) {
            miny = ((Number) value).doubleValue();
        } else if (id.equals("maxx")) {
            maxx = ((Number) value).doubleValue();
        } else if (id.equals("maxy")) {
            maxy = ((Number) value).doubleValue();
        }
        envelop.init(minx, maxx, miny, maxy);

        if (listener != null) {
            listener.propertyChange(new PropertyChangeEvent(this, "envelop", null, envelop));
        }
    }

    public boolean isPropertySet(Object id) {
        return false;
    }

    public void resetPropertyValue(Object id) {
        throw new RuntimeException("not yet implemented.");
    }
}