com.agynamix.simidude.frontend.gui.ClipboardTableDragSource.java Source code

Introduction

Here is the source code for com.agynamix.simidude.frontend.gui.ClipboardTableDragSource.java

Source

/*
 * Copyright by AGYNAMIX(R). All rights reserved. 
 * This file is made available under the terms of the
 * license this product is released under.
 * 
 * For details please see the license file you should have
 * received, or go to:
 * 
 * http://www.agynamix.com
 * 
 * Contributors: agynamix.com (http://www.agynamix.com)
 */
package com.agynamix.simidude.frontend.gui;

import java.util.logging.Logger;

import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.swt.dnd.DND;
import org.eclipse.swt.dnd.DragSource;
import org.eclipse.swt.dnd.DragSourceEvent;
import org.eclipse.swt.dnd.DragSourceListener;
import org.eclipse.swt.dnd.FileTransfer;
import org.eclipse.swt.dnd.ImageTransfer;
import org.eclipse.swt.dnd.TextTransfer;
import org.eclipse.swt.dnd.Transfer;
import org.eclipse.swt.widgets.TableItem;

import com.agynamix.platform.log.ApplicationLog;
import com.agynamix.simidude.clipboard.ClipboardTable;
import com.agynamix.simidude.clipboard.IClipboardItem;
import com.agynamix.simidude.clipboard.SourceDataManager;
import com.agynamix.simidude.source.ISourceData.SourceType;
import com.agynamix.simidude.source.impl.FileSourceData;
import com.agynamix.simidude.source.impl.ImageSourceData;

public class ClipboardTableDragSource implements DragSourceListener {

    final ClipboardTable clipboardTable;
    final TableViewer tableViewer;
    final SourceDataManager sourceDataManager;

    final DragSource dragSource;

    Transfer[] currentTransfer = null;

    Logger log = ApplicationLog.getLogger(ClipboardTableDragSource.class);

    public ClipboardTableDragSource(ClipboardTable clipboardTable, SourceDataManager sourceDataManager) {
        this.clipboardTable = clipboardTable;
        this.tableViewer = clipboardTable.getTableViewer();
        this.sourceDataManager = sourceDataManager;
        dragSource = new DragSource(tableViewer.getControl(), DND.DROP_COPY);
        dragSource.setTransfer(new Transfer[] { TextTransfer.getInstance(), FileTransfer.getInstance() });
        dragSource.addDragListener(this);
    }

    public void dragStart(DragSourceEvent event) {
        IClipboardItem item = getSelectedItem();
        if (item != null) {
            event.doit = true;
            clipboardTable.setDragInProgress(true);
            switch (item.getType()) {
            case FILE:
                if (sourceDataManager.isRetrieveContentsNeeded(item)) {
                    currentTransfer = new Transfer[] { TextTransfer.getInstance() };
                } else {
                    currentTransfer = new Transfer[] { TextTransfer.getInstance(), FileTransfer.getInstance() };
                }
                break;
            case TEXT:
                currentTransfer = new Transfer[] { TextTransfer.getInstance() };
                break;
            case IMAGE:
                currentTransfer = new Transfer[] { ImageTransfer.getInstance() };
                break;
            }
            dragSource.setTransfer(currentTransfer);
        } else {
            event.doit = false;
        }
    }

    public void dragSetData(DragSourceEvent event) {
        IClipboardItem item = getSelectedItem();
        if (item == null) {
            return;
        }
        event.image = item.getImage();

        //    final ModelProvider mp = ((SimidudeApplicationContext)ApplicationBase.getContext()).getModelProvider();
        //    final ISourceData sourceData = item.getSourceData();

        if (TextTransfer.getInstance().isSupportedType(event.dataType)) {
            switch (item.getType()) {
            case TEXT:
                event.data = item.getDescription();
                break;
            case FILE:
                event.data = item.getDescription();
                break;
            }
        } else if (FileTransfer.getInstance().isSupportedType(event.dataType)) {
            switch (item.getType()) {
            case FILE:
                FileSourceData fsd = (FileSourceData) item.getSourceData();
                event.data = new String[] { fsd.getLocalFilename() };
                //          System.out.println("Local Filename: "+fsd.getLocalFilename());
                break;
            case TEXT:
                // we should not get here.
                event.data = new String[] { item.getDescription() };
                break;
            }
        } else if (ImageTransfer.getInstance().isSupportedType(event.dataType)) {
            if (item.getType() == SourceType.IMAGE) {
                ImageSourceData isd = (ImageSourceData) item.getSourceData();
                event.data = isd.getImageData();
            } else {
                log.warning("Cannot support ImageTransfer for Types other than images!");
            }
        }
    }

    protected IClipboardItem getSelectedItem() {
        ISelection s = tableViewer.getSelection();
        if (s instanceof IStructuredSelection) {
            IStructuredSelection ss = (IStructuredSelection) s;
            Object item = ss.getFirstElement();
            if (item instanceof IClipboardItem) {
                return (IClipboardItem) item;
            }
        }
        return null;
    }

    public void dragFinished(DragSourceEvent event) {
        if (event.detail == DND.DROP_MOVE) {
            TableItem[] tableItems = tableViewer.getTable().getSelection();
            if ((tableItems != null) && (tableItems.length > 0)) {
                sourceDataManager.removeItem((IClipboardItem) tableItems[0].getData());
            }
        }
        // We have File.deleteOnExit() enabled, so lets see how this goes.
        //    IClipboardItem item = getSelectedItem();
        //    ((TextSourceData)item.getSourceData()).removeTempFile();
        clipboardTable.setDragInProgress(false);
    }

}