com.siteview.mde.internal.ui.views.plugins.PluginsDragAdapter.java Source code

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Here is the source code for com.siteview.mde.internal.ui.views.plugins.PluginsDragAdapter.java

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/*******************************************************************************
 *  Copyright (c) 2000, 2008 IBM Corporation and others.
 *  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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package com.siteview.mde.internal.ui.views.plugins;

import java.util.ArrayList;
import java.util.Iterator;
import org.eclipse.jface.viewers.ISelectionProvider;
import org.eclipse.jface.viewers.IStructuredSelection;
import com.siteview.mde.internal.core.FileAdapter;
import org.eclipse.swt.dnd.*;
import org.eclipse.swt.widgets.Control;

public class PluginsDragAdapter extends DragSourceAdapter {
    ISelectionProvider selectionProvider;

    /**
     * NavigatorDragAction constructor comment.
     */
    public PluginsDragAdapter(ISelectionProvider provider) {
        selectionProvider = provider;
    }

    /**
     * Returns the data to be transferred in a drag and drop
     * operation.
     */
    public void dragSetData(DragSourceEvent event) {

        //resort to a file transfer
        if (!FileTransfer.getInstance().isSupportedType(event.dataType))
            return;

        FileAdapter[] files = getSelectedFiles();

        // Get the path of each file and set as the drag data
        final int len = files.length;
        String[] fileNames = new String[len];
        for (int i = 0, length = len; i < length; i++) {
            fileNames[i] = files[i].getFile().getAbsolutePath();
        }
        event.data = fileNames;
    }

    /**
     * All selection must be files or folders.
     */
    public void dragStart(DragSourceEvent event) {

        // Workaround for 1GEUS9V
        DragSource dragSource = (DragSource) event.widget;
        Control control = dragSource.getControl();
        if (control != control.getDisplay().getFocusControl()) {
            event.doit = false;
            return;
        }

        FileAdapter[] files = getSelectedFiles();

        if (files.length == 0) {
            event.doit = false;
            return;
        }
        event.doit = true;
    }

    private FileAdapter[] getSelectedFiles() {
        IStructuredSelection selection = (IStructuredSelection) selectionProvider.getSelection();
        ArrayList files = new ArrayList();
        for (Iterator iter = selection.iterator(); iter.hasNext();) {
            Object obj = iter.next();
            if (obj instanceof FileAdapter)
                files.add(obj);
            else
                return new FileAdapter[0];
        }
        return (FileAdapter[]) files.toArray(new FileAdapter[files.size()]);
    }
}