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/*******************************************************************************
* Copyright (c) 2004, 2007 Boeing.
* 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:
* Boeing - initial API and implementation
*******************************************************************************/
package org.eclipse.osee.framework.ui.skynet.util;
import java.util.ArrayList;
import java.util.Collection;
import java.util.logging.Level;
import org.eclipse.osee.framework.jdk.core.type.OseeCoreException;
import org.eclipse.osee.framework.jdk.core.util.Collections;
import org.eclipse.osee.framework.logging.OseeLog;
import org.eclipse.osee.framework.skynet.core.artifact.Artifact;
import org.eclipse.osee.framework.skynet.core.artifact.ArtifactData;
import org.eclipse.osee.framework.ui.skynet.HTMLTransferFormatter;
import org.eclipse.osee.framework.ui.skynet.artifact.ArtifactTransfer;
import org.eclipse.osee.framework.ui.skynet.internal.Activator;
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.DropTarget;
import org.eclipse.swt.dnd.DropTargetAdapter;
import org.eclipse.swt.dnd.DropTargetEvent;
import org.eclipse.swt.dnd.FileTransfer;
import org.eclipse.swt.dnd.HTMLTransfer;
import org.eclipse.swt.dnd.TextTransfer;
import org.eclipse.swt.dnd.Transfer;
import org.eclipse.swt.widgets.Control;
/**
* @author Jeff C. Phillips
*/
public abstract class SkynetDragAndDrop {
private final String viewId;
private DragSource source;
private DropTarget target;
public SkynetDragAndDrop(Control dragAndDropControl, String viewId) {
this(dragAndDropControl, dragAndDropControl, viewId);
}
/**
* Caller may optionally pass null for either the dragSource or dropTarget when both are not needed
*/
public SkynetDragAndDrop(Control dragSource, Control dropTarget, String viewId) {
this.viewId = viewId;
if (dragSource != null) {
source = new DragSource(dragSource, DND.DROP_MOVE | DND.DROP_COPY);
setupDragSupport();
}
if (dropTarget != null) {
target = new DropTarget(dropTarget, DND.DROP_MOVE | DND.DROP_COPY);
setupDropSupport();
}
}
private void setupDragSupport() {
source.setTransfer(new Transfer[] {
HTMLTransfer.getInstance(),
ArtifactTransfer.getInstance(),
TextTransfer.getInstance()});
source.addDragListener(new DragSourceListener() {
@Override
public void dragFinished(DragSourceEvent event) {
// do nothing
}
@Override
public void dragSetData(DragSourceEvent event) {
performDataTransafer(event);
}
@Override
public void dragStart(DragSourceEvent event) {
// do nothing
}
});
}
private void performDataTransafer(DragSourceEvent event) {
if (HTMLTransfer.getInstance().isSupportedType(event.dataType)) {
htmlTransferDragSetData(event);
} else if (ArtifactTransfer.getInstance().isSupportedType(event.dataType)) {
artifactTransferDragSetData(event);
} else if (TextTransfer.getInstance().isSupportedType(event.dataType)) {
textTransferDragSetData(event);
}
}
private void setupDropSupport() {
target.setTransfer(new Transfer[] {
FileTransfer.getInstance(),
TextTransfer.getInstance(),
ArtifactTransfer.getInstance()});
target.addDropListener(new DropTargetAdapter() {
@Override
public void dragOperationChanged(DropTargetEvent event) {
operationChanged(event);
}
@Override
public void drop(DropTargetEvent event) {
performDrop(event);
}
@Override
public void dragOver(DropTargetEvent event) {
try {
performDragOver(event);
} catch (Exception ex) {
OseeLog.log(Activator.class, Level.SEVERE, ex);
}
}
@Override
public void dropAccept(DropTargetEvent event) {
// do nothing
}
});
}
public void performDragOver(DropTargetEvent event) throws OseeCoreException {
// provided for subclass implementation
}
public void artifactTransferDragSetData(DragSourceEvent event) {
try {
if (getArtifacts() != null && getArtifacts().length > 0) {
event.data = new ArtifactData(getArtifacts(), "work", viewId);
}
} catch (Exception ex) {
// OSEELog.logException(ChangeReportView.class, ex, true);
}
}
public void htmlTransferDragSetData(DragSourceEvent event) {
try {
if (getArtifacts() != null && getArtifacts().length > 0) {
event.data = HTMLTransferFormatter.getHtml(getArtifacts());
}
} catch (Exception ex) {
// OSEELog.logException(ChangeReportView.class, ex, true);
}
}
public void textTransferDragSetData(DragSourceEvent event) {
try {
if (getArtifacts() != null && getArtifacts().length > 0) {
Artifact[] artifacts = getArtifacts();
Collection<String> names = new ArrayList<String>(artifacts.length);
for (Artifact artifact : artifacts) {
names.add(artifact.getName());
}
event.data = Collections.toString(names, null, ", ", null);
}
} catch (Exception ex) {
// OSEELog.logException(ChangeReportView.class, ex, true);
}
}
/**
* Override this method to supply the base class with artifacts to be used for drag and drop.
*/
public abstract Artifact[] getArtifacts() throws Exception;
/**
* Override this method to implement the drop operation.
*/
public void performDrop(DropTargetEvent event) {
if (event.data instanceof ArtifactData) {
performArtifactDrop(((ArtifactData) event.data).getArtifacts());
} else if (event.data instanceof String[]) {
performFileDrop((String[]) event.data);
} else if (event.data instanceof String) {
performTextDrop((String) event.data);
}
}
public void operationChanged(DropTargetEvent event) {
// provided for subclass implementation
}
/**
* override this method and its cousins rather than performDrop in order to have the drop data preprocessed and
* passed in the desired form
*/
public void performTextDrop(String text) {
// provided for subclass implementation
}
/**
* override this method and its cousins rather than performDrop in order to have the drop data preprocessed and
* passed in the desired form
*/
public void performArtifactDrop(Artifact[] dropArtifacts) {
// provided for subclass implementation
}
/**
* override this method and its cousins rather than performDrop in order to have the drop data preprocessed and
* passed in the desired form
*/
public void performFileDrop(String[] fileNames) {
// provided for subclass implementation
}
}
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