de.fhg.igd.mapviewer.server.wms.wizard.pages.LayersDialog.java Source code

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Here is the source code for de.fhg.igd.mapviewer.server.wms.wizard.pages.LayersDialog.java

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/*
 * Copyright (c) 2016 Fraunhofer IGD
 * 
 * All rights reserved. This program and the accompanying materials are made
 * available under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 3 of the License,
 * or (at your option) any later version.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution. If not, see <http://www.gnu.org/licenses/>.
 * 
 * Contributors:
 *     Fraunhofer IGD <http://www.igd.fraunhofer.de/>
 */
package de.fhg.igd.mapviewer.server.wms.wizard.pages;

import java.util.List;

import org.eclipse.jface.dialogs.TitleAreaDialog;
import org.eclipse.jface.viewers.BaseLabelProvider;
import org.eclipse.jface.viewers.CheckStateChangedEvent;
import org.eclipse.jface.viewers.CheckboxTableViewer;
import org.eclipse.jface.viewers.ICheckStateListener;
import org.eclipse.jface.viewers.ICheckStateProvider;
import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.ITableLabelProvider;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.TableColumn;

import de.fhg.igd.mapviewer.server.wms.capabilities.Layer;

/**
 * Dialog for selecting and ordering {@link Layer}s
 * 
 * @author Simon Templer
 */
public class LayersDialog extends TitleAreaDialog {

    /**
     * Check state provider for {@link Layer}s
     */
    private static class LayerCheckStateProvider implements ICheckStateProvider {

        /**
         * @see ICheckStateProvider#isChecked(java.lang.Object)
         */
        @Override
        public boolean isChecked(Object element) {
            if (element instanceof Layer) {
                return ((Layer) element).isSelected();
            } else {
                return false;
            }
        }

        /**
         * @see ICheckStateProvider#isGrayed(java.lang.Object)
         */
        @Override
        public boolean isGrayed(Object element) {
            return false;
        }

    }

    /**
     * Label provider for {@link Layer}s
     */
    private static class LayerLabelProvider extends BaseLabelProvider implements ITableLabelProvider {

        /**
         * @see ITableLabelProvider#getColumnImage(java.lang.Object, int)
         */
        @Override
        public Image getColumnImage(Object element, int columnIndex) {
            return null;
        }

        /**
         * @see ITableLabelProvider#getColumnText(java.lang.Object, int)
         */
        @Override
        public String getColumnText(Object element, int columnIndex) {
            if (element instanceof Layer) {
                Layer layer = (Layer) element;
                switch (columnIndex) {
                case 0:
                    return layer.getDisplayName();
                case 1:
                    return layer.getDescription();
                default:
                    return null;
                }
            } else {
                return element.toString();
            }
        }

    }

    private final List<Layer> layers;

    /**
     * Constructor
     * 
     * @param parentShell the shell
     * @param layers the layer list
     */
    public LayersDialog(Shell parentShell, final List<Layer> layers) {
        super(parentShell);

        this.layers = layers;
    }

    /**
     * @see TitleAreaDialog#createContents(Composite)
     */
    @Override
    protected Control createContents(Composite parent) {
        Control control = super.createContents(parent);

        setMessage(Messages.LayersDialog_0);
        setTitle(Messages.LayersDialog_1);

        return control;
    }

    /**
     * @see TitleAreaDialog#createDialogArea(Composite)
     */
    @Override
    protected Control createDialogArea(Composite parent) {
        Composite page = new Composite(parent, SWT.NONE);
        GridData data = new GridData(SWT.FILL, SWT.FILL, true, true);
        page.setLayoutData(data);
        page.setLayout(new FillLayout());

        CheckboxTableViewer table = CheckboxTableViewer.newCheckList(page, SWT.V_SCROLL | SWT.BORDER);

        TableColumn names = new TableColumn(table.getTable(), SWT.NONE);
        names.setWidth(200);
        names.setText(Messages.LayersDialog_2);
        TableColumn descs = new TableColumn(table.getTable(), SWT.NONE);
        descs.setWidth(200);
        descs.setText(Messages.LayersDialog_3);

        // labels
        table.setLabelProvider(new LayerLabelProvider());
        table.setCheckStateProvider(new LayerCheckStateProvider());
        table.addCheckStateListener(new ICheckStateListener() {

            @Override
            public void checkStateChanged(CheckStateChangedEvent event) {
                ((Layer) event.getElement()).setSelected(event.getChecked());
            }

        });

        // content
        table.setContentProvider(new IStructuredContentProvider() {

            @Override
            public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
                // ignore
            }

            @Override
            public void dispose() {
                // ignore
            }

            @Override
            @SuppressWarnings("unchecked")
            public Object[] getElements(Object inputElement) {
                return ((List<Layer>) inputElement).toArray();
            }
        });

        table.setInput(layers);
        table.getTable().setLinesVisible(true);
        table.getTable().setHeaderVisible(true);

        // pack columns
        names.pack();
        descs.pack();

        return page;
    }

}