com.skratchdot.electribe.fileexplorer.views.FileExplorerDragSourceAdapter.java Source code

Introduction

Here is the source code for com.skratchdot.electribe.fileexplorer.views.FileExplorerDragSourceAdapter.java

Source

/*******************************************************************************
 * Copyright (c) 2009-2013 SKRATCHDOT.COM
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * http://www.eclipse.org/legal/epl-v10.html
 *  
 * Contributors:
 *     JEFF |:at:| SKRATCHDOT |:dot:| COM
 *******************************************************************************/
package com.skratchdot.electribe.fileexplorer.views;

import java.io.File;
import java.util.ArrayList;
import java.util.Iterator;

import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.swt.dnd.DragSourceAdapter;
import org.eclipse.swt.dnd.DragSourceEvent;
import org.eclipse.swt.dnd.FileTransfer;

public class FileExplorerDragSourceAdapter extends DragSourceAdapter {
    private Viewer viewer;

    public FileExplorerDragSourceAdapter(Viewer viewer) {
        super();
        this.viewer = viewer;
    }

    @Override
    public void dragFinished(DragSourceEvent event) {
        super.dragFinished(event);
    }

    @Override
    public void dragSetData(DragSourceEvent event) {
        super.dragSetData(event);

        String[] files = this.getFileListFromSelection();

        if (files.length > 0) {
            if (FileTransfer.getInstance().isSupportedType(event.dataType)) {
                event.data = files;
            }
        } else {
            event.doit = false;
        }
    }

    @Override
    public void dragStart(DragSourceEvent event) {
        super.dragStart(event);

        String[] files = this.getFileListFromSelection();

        event.doit = (files.length > 0);

    }

    private String[] getFileListFromSelection() {
        IStructuredSelection selection = (IStructuredSelection) viewer.getSelection();

        ArrayList<String> fileList = new ArrayList<String>();
        for (Iterator<?> i = selection.iterator(); i.hasNext();) {
            Object current = i.next();
            if (current instanceof File) {
                String filePath = ((File) current).getAbsolutePath();
                fileList.add(filePath);
            }
        }
        String[] files = new String[fileList.size()];
        fileList.toArray(files);

        return files;
    }

}