eu.esdihumboldt.hale.ui.templates.webtemplates.WebTemplatesDialog.java Source code

Introduction

Here is the source code for eu.esdihumboldt.hale.ui.templates.webtemplates.WebTemplatesDialog.java

Source

/*
 * Copyright (c) 2013 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.templates.webtemplates;

import java.awt.Desktop;
import java.io.IOException;
import java.util.List;

import org.eclipse.jface.layout.TreeColumnLayout;
import org.eclipse.jface.viewers.ColumnWeightData;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.StyledCellLabelProvider;
import org.eclipse.jface.viewers.StyledString;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.TreeViewerColumn;
import org.eclipse.jface.viewers.ViewerCell;
import org.eclipse.jface.viewers.ViewerComparator;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.MouseAdapter;
import org.eclipse.swt.events.MouseEvent;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.dialogs.FilteredTree;
import org.eclipse.ui.dialogs.PatternFilter;

import de.fhg.igd.slf4jplus.ALogger;
import de.fhg.igd.slf4jplus.ALoggerFactory;
import eu.esdihumboldt.hale.ui.util.selector.AbstractViewerSelectionDialog;

/**
 * Dialog for selecting a web template to load.
 * 
 * @author Simon Templer
 */
public class WebTemplatesDialog extends AbstractViewerSelectionDialog<WebTemplate, TreeViewer> {

    private static final ALogger log = ALoggerFactory.getLogger(WebTemplatesDialog.class);
    private TreeColumnLayout layout;
    private final List<WebTemplate> templates;

    /**
     * Create a dialog to select a web template to load.
     * 
     * @param parentShell the parent shell
     * @param templates the templates to display
     */
    public WebTemplatesDialog(Shell parentShell, List<WebTemplate> templates) {
        super(parentShell, "Select a project template to load", null, false, 600, 400);
        this.templates = templates;
    }

    @Override
    protected TreeViewer createViewer(Composite parent) {
        layout = new TreeColumnLayout();
        PatternFilter patternFilter = new PatternFilter();
        patternFilter.setIncludeLeadingWildcard(true);
        FilteredTree tree = new FilteredTree(parent, SWT.SINGLE | SWT.H_SCROLL | SWT.V_SCROLL | SWT.BORDER,
                patternFilter, true) {

            @Override
            protected Control createTreeControl(Composite parent, int style) {
                Control c = super.createTreeControl(parent, style);
                c.setLayoutData(null);
                c.getParent().setLayout(layout);
                return c;
            }
        };
        return tree.getViewer();
    }

    @Override
    protected void setupViewer(final TreeViewer viewer, WebTemplate initialSelection) {
        // this label provider is used for filtering (I guess)
        viewer.setLabelProvider(new LabelProvider() {

            @Override
            public String getText(Object element) {
                if (element instanceof WebTemplate) {
                    return ((WebTemplate) element).getName();
                }
                return super.getText(element);
            }

        });

        viewer.getTree().setHeaderVisible(true);
        //      viewer.getTree().setLinesVisible(true);

        // main column
        TreeViewerColumn mainColumn = new TreeViewerColumn(viewer, SWT.NONE);
        mainColumn.setLabelProvider(new StyledCellLabelProvider() {

            @Override
            public void update(ViewerCell cell) {
                Object element = cell.getElement();

                StyledString text = new StyledString();
                if (element instanceof WebTemplate) {
                    WebTemplate template = (WebTemplate) element;

                    text.append(template.getName());
                } else {
                    text.append(element.toString());
                }

                cell.setText(text.getString());
                cell.setStyleRanges(text.getStyleRanges());

                super.update(cell);
            }
        });
        mainColumn.getColumn().setText("Template");
        layout.setColumnData(mainColumn.getColumn(), new ColumnWeightData(7));

        // link column
        if (Desktop.isDesktopSupported()) {
            TreeViewerColumn linkColumn = new TreeViewerColumn(viewer, SWT.CENTER);
            linkColumn.setLabelProvider(new LinkLabels());

            // listener that reacts on link cell clicks
            viewer.getTree().addMouseListener(new MouseAdapter() {

                @Override
                public void mouseDown(MouseEvent e) {
                    if (e.button == 1) {
                        ViewerCell cell = viewer.getCell(new Point(e.x, e.y));
                        if (cell != null && cell.getColumnIndex() == 1 && cell.getTextBounds().contains(e.x, e.y)) {
                            Object element = cell.getElement();
                            if (element instanceof WebTemplate) {
                                try {
                                    Desktop.getDesktop().browse(((WebTemplate) element).getSite());
                                } catch (IOException e1) {
                                    log.error("Could not launch browser", e1);
                                }
                            }
                        }
                    }
                }
            });

            layout.setColumnData(linkColumn.getColumn(), new ColumnWeightData(1));
        }

        viewer.setComparator(new ViewerComparator());

        viewer.setContentProvider(new WebTemplatesContentProvider());
        viewer.setInput(templates);
    }

    @Override
    protected WebTemplate getObjectFromSelection(ISelection selection) {
        if (selection instanceof IStructuredSelection && !selection.isEmpty()) {
            Object element = ((IStructuredSelection) selection).getFirstElement();
            if (element instanceof WebTemplate) {
                return (WebTemplate) element;
            }
        }

        return null;
    }

}