/*******************************************************************************
* Copyright (c) 2006 Sybase, Inc. 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:
* Sybase, Inc. - initial API and implementation
*******************************************************************************/
package org.eclipse.jst.pagedesigner.dnd.internal;
import org.eclipse.core.resources.IWorkspace;
import org.eclipse.core.resources.IWorkspaceRoot;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.Path;
import org.eclipse.gef.EditPartViewer;
import org.eclipse.gef.Request;
import org.eclipse.gef.dnd.AbstractTransferDropTargetListener;
import org.eclipse.jface.util.LocalSelectionTransfer;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.jst.jsf.common.ui.internal.guiutils.Alerts;
import org.eclipse.jst.pagedesigner.PDPlugin;
import org.eclipse.jst.pagedesigner.dnd.LocalDropRequest;
import org.eclipse.jst.pagedesigner.viewer.IHTMLGraphicalViewer;
import org.eclipse.swt.dnd.DND;
import org.eclipse.swt.dnd.DropTargetEvent;
/**
* @author mengbo
*/
public class LocalSelectionDropTargetListener extends
AbstractTransferDropTargetListener {
/**
* @param viewer
*/
public LocalSelectionDropTargetListener(EditPartViewer viewer) {
super(viewer, LocalSelectionTransfer.getTransfer());
}
/*
* (non-Javadoc)
*
* @see org.eclipse.gef.dnd.AbstractTransferDropTargetListener#createTargetRequest()
*/
protected Request createTargetRequest() {
LocalDropRequest request = new LocalDropRequest();
request.setLocation(getDropLocation());
request.setLocalObject(getCurrentLocalObject());
return request;
}
/**
* @return the current local object
*/
private Object getCurrentLocalObject() {
ISelection sel = LocalSelectionTransfer.getTransfer().getSelection();
if (sel instanceof IStructuredSelection) {
return ((IStructuredSelection) sel).getFirstElement();
}
return null;
}
/*
* (non-Javadoc)
*
* @see org.eclipse.gef.dnd.AbstractTransferDropTargetListener#updateTargetRequest()
*/
protected void updateTargetRequest() {
LocalDropRequest dropRequest = (LocalDropRequest) getTargetRequest();
dropRequest.setLocation(getDropLocation());
dropRequest.setLocalObject(getCurrentLocalObject());
}
/*
* (non-Javadoc)
*
* @see org.eclipse.gef.dnd.AbstractTransferDropTargetListener#setCurrentEvent(org.eclipse.swt.dnd.DropTargetEvent)
*/
public void setCurrentEvent(DropTargetEvent currentEvent) {
super.setCurrentEvent(currentEvent);
if (currentEvent != null) {
if (currentEvent.detail != DND.DROP_NONE) {
currentEvent.detail = DND.DROP_COPY;
}
}
}
/*
* (non-Javadoc)
*
* @see org.eclipse.swt.dnd.DropTargetListener#dragOperationChanged(org.eclipse.swt.dnd.DropTargetEvent)
*/
public void dragOperationChanged(DropTargetEvent event) {
// switch the insert or update
if ((event.detail & (DND.DROP_COPY)) != 0) {
LocalDropEditPolicy.setCheckUpdate(false);
} else {
LocalDropEditPolicy.setCheckUpdate(true);
}
super.dragOperationChanged(event);
}
/*
* (non-Javadoc)
*
* @see org.eclipse.swt.dnd.DropTargetListener#drop(org.eclipse.swt.dnd.DropTargetEvent)
*/
public void drop(DropTargetEvent event) {
String path = ((IHTMLGraphicalViewer) getViewer()).getModel()
.getBaseLocation();
IWorkspace workspace = ResourcesPlugin.getWorkspace();
IWorkspaceRoot root = workspace.getRoot();
IPath filePath = new Path(path);
if (root.getFile(filePath).exists()) {
getViewer().getControl().setFocus();
super.drop(event);
LocalDropEditPolicy.setCheckUpdate(true);
} else {
Alerts alert = PDPlugin.getAlerts();
alert.info("LocalSelectionDropTargetListener.MessageDialog.Title", //$NON-NLS-1$
"LocalSelectionDropTargetListener.MessageDialog.Message"); //$NON-NLS-1$
}
}
}