DemSelector.java

/*
 * Copyright (C) 2011 Brockmann Consult GmbH (info@brockmann-consult.de)
 *
 * 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 3 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, see http://www.gnu.org/licenses/
 */

package org.esa.snap.ui;

import org.esa.snap.core.dataop.dem.ElevationModelDescriptor;
import org.esa.snap.core.dataop.dem.ElevationModelRegistry;
import org.esa.snap.core.param.ParamChangeEvent;
import org.esa.snap.core.param.ParamChangeListener;
import org.esa.snap.core.param.ParamParseException;
import org.esa.snap.core.param.ParamValidateException;
import org.esa.snap.core.param.Parameter;
import org.esa.snap.core.param.editors.RadioButtonEditor;

import javax.swing.AbstractButton;
import javax.swing.BorderFactory;
import javax.swing.ButtonGroup;
import javax.swing.JPanel;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;

public class DemSelector extends JPanel {

    private Parameter _paramProductDem;
    private Parameter _paramExternalDem;
    private Parameter _paramDem;

    public DemSelector() {
        this(null);
    }

    public DemSelector(ParamChangeListener paramChangeListener) {
        createParameter(paramChangeListener);
        createUI();
        updateUIState();
    }

    public boolean isUsingProductDem() {
        return (Boolean) _paramProductDem.getValue();
    }

    public void setUsingProductDem(final boolean usingProductDem) throws ParamValidateException {
        _paramProductDem.setValue(usingProductDem);
    }

    public boolean isUsingExternalDem() {
        return (Boolean) _paramExternalDem.getValue();
    }

    public void setUsingExternalDem(final boolean usingExternalDem) throws ParamValidateException {
        _paramExternalDem.setValue(usingExternalDem);
    }

    public String getDemName() {
        return _paramDem.getValueAsText();
    }

    public void setDemName(String demName) throws ParamValidateException, ParamParseException {
        _paramDem.setValueAsText(demName);
    }

    private void createUI() {
        this.setLayout(new GridBagLayout());
        this.setBorder(BorderFactory.createTitledBorder("Digital Elevation Model (DEM)"));            /*I18N*/

        final GridBagConstraints gbc = GridBagUtils.createDefaultConstraints();
        final ButtonGroup buttonGroup = new ButtonGroup();
        buttonGroup.add((AbstractButton) _paramProductDem.getEditor().getComponent());
        buttonGroup.add((AbstractButton) _paramExternalDem.getEditor().getComponent());

        GridBagUtils.setAttributes(gbc, "insets.top=3, fill=HORIZONTAL");
        gbc.gridy++;
        GridBagUtils.addToPanel(this, _paramProductDem.getEditor().getComponent(), gbc);
        gbc.gridy++;
        GridBagUtils.addToPanel(this, _paramExternalDem.getEditor().getComponent(), gbc, "weightx=1");
        GridBagUtils.addToPanel(this, _paramDem.getEditor().getComponent(), gbc, "weightx=999");
    }

    private void updateUIState() {
        _paramDem.setUIEnabled(isUsingExternalDem());
    }

    private void createParameter(final ParamChangeListener delegate) {
        ParamChangeListener paramChangeListener = new ParamChangeListener() {
            public void parameterValueChanged(final ParamChangeEvent event) {
                updateUIState();
                if (delegate != null) {
                    delegate.parameterValueChanged(event);
                }
            }
        };

        _paramProductDem = new Parameter("useProductDem", Boolean.FALSE);
        _paramProductDem.getProperties().setLabel("Use elevation from tie-points");        /*I18N*/
        _paramProductDem.getProperties().setEditorClass(RadioButtonEditor.class);
        _paramProductDem.addParamChangeListener(paramChangeListener);

        _paramExternalDem = new Parameter("useExternalDem", Boolean.TRUE);
        _paramExternalDem.getProperties().setLabel("Use external DEM");      /*I18N*/
        _paramExternalDem.getProperties().setEditorClass(RadioButtonEditor.class);
        _paramExternalDem.addParamChangeListener(paramChangeListener);

        final ElevationModelDescriptor[] descriptors = ElevationModelRegistry.getInstance().getAllDescriptors();
        final String[] demValueSet = new String[descriptors.length];
        for (int i = 0; i < descriptors.length; i++) {
            demValueSet[i] = descriptors[i].getName();
        }
        _paramDem = new Parameter("dem", "");
        _paramDem.getProperties().setLabel("Elevation Model:");     /*I18N*/
        _paramDem.getProperties().setValueSetBound(true);
        if (demValueSet.length != 0) {
            _paramDem.setValue(demValueSet[0], null);
            _paramDem.getProperties().setValueSet(demValueSet);
        }
        _paramDem.addParamChangeListener(paramChangeListener);
    }

}