at.bitandart.zoubek.mervin.swt.comments.CommentListViewer.java Source code

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Here is the source code for at.bitandart.zoubek.mervin.swt.comments.CommentListViewer.java

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/*******************************************************************************
 * Copyright (c) 2016 Florian Zoubek.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    Florian Zoubek - initial API and implementation
 *******************************************************************************/
package at.bitandart.zoubek.mervin.swt.comments;

import java.util.List;

import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.ui.forms.widgets.FormToolkit;

import at.bitandart.zoubek.mervin.swt.comments.data.IComment;
import at.bitandart.zoubek.mervin.swt.comments.data.ICommentColumn;
import at.bitandart.zoubek.mervin.swt.comments.data.ICommentGroup;
import at.bitandart.zoubek.mervin.swt.comments.data.ICommentProvider;

/**
 * A {@link Viewer} that manages the content of a {@link CommentList} widget.
 * 
 * @author Florian Zoubek
 *
 */
public class CommentListViewer extends Viewer {

    private CommentList commentListControl;
    private ICommentProvider commentProvider;

    private Object input;

    public CommentListViewer(Composite parent, FormToolkit toolkit, int style) {
        commentListControl = new CommentList(parent, style, toolkit);
    }

    @Override
    public Control getControl() {
        return commentListControl;
    }

    @Override
    public Object getInput() {
        return input;
    }

    @Override
    public ISelection getSelection() {
        // This viewer does not support selection (yet)
        return StructuredSelection.EMPTY;
    }

    @Override
    public void refresh() {

        if (commentProvider != null) {

            commentListControl.clearData();

            List<ICommentColumn> commentColumns = commentProvider.getCommentColumns(input);

            for (ICommentColumn commentColumn : commentColumns) {
                commentListControl.addCommentColumn(commentColumn);
            }
            if (!commentColumns.isEmpty()) {
                List<ICommentGroup> commentGroups = commentProvider.getCommentGroups(input);
                for (ICommentGroup commentGroup : commentGroups) {

                    commentListControl.addCommentGroup(commentGroup);
                    for (ICommentColumn commentColumn : commentColumns) {
                        List<IComment> comments = commentProvider.getComments(input, commentGroup, commentColumn);
                        for (IComment comment : comments) {
                            commentListControl.addComment(commentGroup, commentColumn, comment);
                        }
                    }
                }
            }

            commentListControl.layout(true, true);
        }

    }

    @Override
    public void setInput(Object input) {
        this.input = input;
    }

    @Override
    public void setSelection(ISelection selection, boolean reveal) {
        // This viewer does not support selection (yet)
    }

    /**
     * @return the comment list control used by this viewer
     */
    public CommentList getCommentListControl() {
        return commentListControl;
    }

    /**
     * sets the provider that is used to update the controls of this viewer.
     * 
     * @param commentProvider
     *            the provider to use.
     */
    public void setCommentProvider(ICommentProvider commentProvider) {
        this.commentProvider = commentProvider;
    }

}