net.sf.freeqda.view.projectview.ProjectViewer.java Source code

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Here is the source code for net.sf.freeqda.view.projectview.ProjectViewer.java

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/*******************************************************************************
 * FreeQDA,  a software for professional qualitative research data 
 * analysis, such as interviews, manuscripts, journal articles, memos
 * and field notes.
 *
 * Copyright (C) 2011 Dirk Kitscha, Jrg groe Schlarmann
 *
 * 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 net.sf.freeqda.view.projectview;

import net.sf.freeqda.common.projectmanager.ProjectDataModifiedListener;
import net.sf.freeqda.common.projectmanager.ProjectManager;
import net.sf.freeqda.common.projectmanager.TextCategoryNode;
import net.sf.freeqda.common.projectmanager.TextNode;

import org.eclipse.jface.action.MenuManager;
import org.eclipse.jface.viewers.DecoratingLabelProvider;
import org.eclipse.jface.viewers.DoubleClickEvent;
import org.eclipse.jface.viewers.IDoubleClickListener;
import org.eclipse.jface.viewers.ILabelDecorator;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Menu;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.handlers.IHandlerService;
import org.eclipse.ui.part.ViewPart;

public class ProjectViewer extends ViewPart implements ProjectDataModifiedListener {

    public static final String ID = "net.sf.freeqda.projectview.ProjectViewer"; //$NON-NLS-1$
    private static final String EDITOR_COMMAND_ID = "net.sf.freeqda.common.callEditor"; //$NON-NLS-1$

    private static final ProjectManager PROJECT_MANAGER = ProjectManager.getInstance();

    private TreeViewer treeViewer;
    private Composite parentComposite;

    public ProjectViewer() {
        ProjectManager.registerProjectModifiedListener(this);
    }

    @Override
    public void createPartControl(Composite parent) {
        parentComposite = parent;
        parent.setLayout(new FillLayout(SWT.HORIZONTAL));

        ILabelDecorator documentDecorator = PlatformUI.getWorkbench().getDecoratorManager().getLabelDecorator();

        treeViewer = new TreeViewer(parent, SWT.NONE);
        treeViewer.setContentProvider(new TextTreeContentProvider(TextTreeContentProvider.SHOW_CATEGORY_AND_TEXT));
        treeViewer.setLabelProvider(new DecoratingLabelProvider(new TextTreeLabelProvider(), documentDecorator));

        Tree tree = treeViewer.getTree();
        tree.setLinesVisible(true);
        tree.setBackground(new Color(parent.getDisplay(), 255, 255, 255));

        /*
         *  First we create a menu Manager
         */
        MenuManager menuManager = new MenuManager();
        Menu menu = menuManager.createContextMenu(treeViewer.getTree());

        /*
         *  Set the MenuManager
         */
        treeViewer.getTree().setMenu(menu);
        getSite().registerContextMenu(menuManager, treeViewer);

        treeViewer.setInput(PROJECT_MANAGER);
        treeViewer.expandAll();

        /*
         *  Make the selection available
         */
        getSite().setSelectionProvider(treeViewer);

        hookDoubleClickCommand();

        parent.setEnabled(false);
    }

    private void hookDoubleClickCommand() {
        treeViewer.addDoubleClickListener(new IDoubleClickListener() {
            public void doubleClick(DoubleClickEvent event) {
                openSelectedTextInEditor();
            }
        });
    }

    public void openSelectedTextInEditor() {

        /*
         * If we have a selected TextNode then open the editor
         */
        ISelection selection = getSite().getSelectionProvider().getSelection();
        if (selection != null && selection instanceof IStructuredSelection) {
            Object obj = ((IStructuredSelection) selection).getFirstElement();
            if ((obj != null) && (obj instanceof TextNode)) {
                IHandlerService handlerService = (IHandlerService) getSite().getService(IHandlerService.class);
                try {
                    handlerService.executeCommand(EDITOR_COMMAND_ID, null);
                } catch (Exception ex) {
                    ex.printStackTrace();
                    throw new RuntimeException(EXCEPTION_INVALID_OBJECT);
                }
            }
        }
    }

    private static final String EXCEPTION_INVALID_OBJECT = Messages.ProjectViewer_InvalidObject;

    @Override
    public void setFocus() {
        treeViewer.getControl().setFocus();
    }

    @Override
    public void ProjectDataModified() {
        refresh(null);
        parentComposite.setEnabled(PROJECT_MANAGER.isActive());
    }

    public void refresh(TextCategoryNode rootNode) {
        //FIXME save changes on refresh?
        if (rootNode == null) {
            treeViewer.refresh();
            treeViewer.expandAll();
        } else {
            treeViewer.refresh(rootNode);
            treeViewer.expandToLevel(rootNode, TreeViewer.ALL_LEVELS);
        }
    }
}