Application: gvSIG desktop

package org.gvsig.app.extension;

import java.awt.datatransfer.DataFlavor;

import java.awt.datatransfer.Transferable;

import java.awt.dnd.DropTarget;

import java.awt.dnd.DropTargetDragEvent;

import java.awt.dnd.DropTargetDropEvent;

import java.awt.dnd.DropTargetEvent;

import java.awt.dnd.DropTargetListener;

import java.io.File;

import java.util.List;

import javax.swing.TransferHandler;

import org.gvsig.andami.PluginsLocator;

import org.gvsig.andami.PluginsManager;

import org.gvsig.andami.actioninfo.ActionInfo;

import org.gvsig.andami.actioninfo.ActionInfoManager;

import org.gvsig.andami.plugins.Extension;

import org.gvsig.app.ApplicationLocator;

import org.gvsig.app.ApplicationManager;

import org.gvsig.app.project.ProjectManager;

import org.gvsig.app.project.documents.DocumentManager;

import org.gvsig.app.project.documents.view.ViewManager;

import org.gvsig.app.project.documents.view.gui.IView;

import org.gvsig.app.project.documents.view.toc.DnDJTree;

import org.gvsig.app.project.documents.view.toc.TocItemBranch;

import org.gvsig.app.project.documents.view.toc.gui.TOC;

import org.gvsig.tools.observer.Notification;

import org.gvsig.tools.observer.Observable;

import org.gvsig.tools.observer.Observer;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

public class AddLayerDropingFile extends Extension implements Runnable, Observer, DropTargetListener  {

    private static final Logger logger = LoggerFactory.getLogger(AddLayerDropingFile.class);

    private ActionInfo addLayerAction = null;

    public void initialize() {

    }

    public void execute(String actionCommand) {

    }

    public void postInitialize() {

        PluginsManager pluginManager = PluginsLocator.getManager();

        pluginManager.addStartupTask("RegisterDropFilesOnTheView", this, true, 800);

    }

    public boolean isEnabled() {

        return false;

    }

    public boolean isVisible() {

        return false;

    }

    public void run() {

        ActionInfoManager actionManager = PluginsLocator.getActionInfoManager();

        addLayerAction = actionManager.getAction("view-layer-add");

        if( addLayerAction==null ) {

            logger.warn("can't locate addLayer action, don't enable drop of files in the view.");

            return;

        }

        ApplicationManager application = ApplicationLocator.getManager();

        ProjectManager pm = application.getProjectManager();

        ViewManager viewManager = (ViewManager) pm.getDocumentManager(ViewManager.TYPENAME);

        viewManager.addObserver(this);

    }

    public void update(Observable observable, Object notificationArg) {

        Notification notification = (Notification)notificationArg;

        if( notification.isOfType(DocumentManager.NOTIFY_AFTER_GETMAINWINDOW) ) {

            enableDragInView((IView) notification.getValue());

        }

    }

    private void enableDragInView(IView view) {

        DropTarget dt = new DropTarget(view.getMapControl(),this);

    }

    public void dragEnter(DropTargetDragEvent dtde) {

    }

    public void dragOver(DropTargetDragEvent dtde) {

    }

    public void dropActionChanged(DropTargetDragEvent dtde) {

    }

    public void dragExit(DropTargetEvent dte) {

    }

    public void drop(DropTargetDropEvent dtde) {

        Transferable tr = dtde.getTransferable();

        if (!tr.isDataFlavorSupported(DataFlavor.javaFileListFlavor)) {

                dtde.rejectDrop();

                return;

        }

        dtde.acceptDrop(dtde.getDropAction());

        List<File> fileNames;

        try {

            fileNames = (List<File>)tr.getTransferData(DataFlavor.javaFileListFlavor);

        } catch (Exception e) {

            try {

                dtde.rejectDrop();

            } catch(Exception ex) {

            }

            logger.warn("Can't retrieve droped files.",e);

            return;

        }

        dtde.dropComplete(true);

        addLayerAction.execute(fileNames);

    }

}