eu.esdihumboldt.hale.ui.codelist.inspire.internal.CodeListSelectionDialog.java Source code

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Here is the source code for eu.esdihumboldt.hale.ui.codelist.inspire.internal.CodeListSelectionDialog.java

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/*
 * Copyright (c) 2012 Data Harmonisation Panel
 * 
 * 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:
 *     Data Harmonisation Panel <http://www.dhpanel.eu>
 */

package eu.esdihumboldt.hale.ui.codelist.inspire.internal;

import java.lang.reflect.InvocationTargetException;
import java.util.Collection;

import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.jface.dialogs.ProgressMonitorDialog;
import org.eclipse.jface.operation.IRunnableWithProgress;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.StructuredViewer;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerFilter;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.dialogs.FilteredTree;
import org.eclipse.ui.dialogs.PatternFilter;

import eu.esdihumboldt.hale.common.inspire.codelists.CodeListRef;
import eu.esdihumboldt.hale.common.inspire.codelists.RegistryCodeLists;
import eu.esdihumboldt.hale.ui.util.selector.AbstractViewerSelectionDialog;

/**
 * Dialog for selecting a {@link CodeListRef}.
 * 
 * @author Simon Templer
 */
public class CodeListSelectionDialog extends AbstractViewerSelectionDialog<CodeListRef, TreeViewer> {

    /**
     * Create a dialog for selecting a {@link CodeListRef}.
     * 
     * @param parentShell the parent shell
     * @param initialSelection the initial selection
     */
    public CodeListSelectionDialog(Shell parentShell, CodeListRef initialSelection) {
        super(parentShell, "Select a code list", initialSelection);
    }

    /**
     * @see AbstractViewerSelectionDialog#createViewer(Composite)
     */
    @Override
    protected TreeViewer createViewer(Composite parent) {
        PatternFilter patternFilter = new PatternFilter();
        patternFilter.setIncludeLeadingWildcard(true);
        FilteredTree tree = new FilteredTree(parent, SWT.SINGLE | SWT.H_SCROLL | SWT.V_SCROLL | SWT.BORDER,
                patternFilter, true);
        tree.getViewer().setComparator(new CodeListComparator());

        // set filter to only accept code list selection (must be set after
        // pattern filter is created)
        setFilters(new ViewerFilter[] { new ViewerFilter() {

            @Override
            public boolean select(Viewer viewer, Object parentElement, Object element) {
                return element instanceof CodeListRef;
            }
        } });

        return tree.getViewer();
    }

    /**
     * @see AbstractViewerSelectionDialog#setupViewer(StructuredViewer, Object)
     */
    @Override
    protected void setupViewer(final TreeViewer viewer, final CodeListRef initialSelection) {
        viewer.setLabelProvider(new CodeListLabelProvider());
        viewer.setContentProvider(new CodeListContentProvider());

        ProgressMonitorDialog dlg = new ProgressMonitorDialog(getShell());
        final Display display = Display.getCurrent();
        try {
            dlg.run(true, false, new IRunnableWithProgress() {

                @Override
                public void run(IProgressMonitor monitor) throws InvocationTargetException, InterruptedException {
                    monitor.beginTask("Loading available code lists from INSPIRE registry",
                            IProgressMonitor.UNKNOWN);

                    final Collection<CodeListRef> codeLists = RegistryCodeLists.loadCodeLists().values();

                    display.asyncExec(new Runnable() {

                        @Override
                        public void run() {
                            viewer.setInput(codeLists);

                            if (initialSelection != null) {
                                viewer.setSelection(new StructuredSelection(initialSelection));
                            }
                        }
                    });

                    monitor.done();
                }
            });
        } catch (InvocationTargetException | InterruptedException e) {
            throw new IllegalStateException("Failed to load code lists", e);
        }
    }

    /**
     * @see AbstractViewerSelectionDialog#getObjectFromSelection(ISelection)
     */
    @Override
    protected CodeListRef getObjectFromSelection(ISelection selection) {
        if (!selection.isEmpty() && selection instanceof IStructuredSelection) {
            Object element = ((IStructuredSelection) selection).getFirstElement();
            if (element instanceof CodeListRef) {
                return (CodeListRef) element;
            }
        }

        return null;
    }

}