Eclipse插件开发- view to view drag drop

package public_project.view.dnd;

import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerDropAdapter;
import org.eclipse.swt.dnd.DND;
import org.eclipse.swt.dnd.DropTargetEvent;
import org.eclipse.swt.dnd.TransferData;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.TreeItem;

import public_project.view.model.descriptors.ProjectDetail;
import public_project.view.model.descriptors.ProjectGroup;

public class ViewDropListener extends ViewerDropAdapter {

private TreeViewer treeViewer;

public ViewDropListener(Viewer viewer) {
super(viewer);
this.treeViewer = (TreeViewer) viewer;
}
@Override
public void drop(DropTargetEvent event) {
if (event.data == null) {
event.detail = DND.DROP_NONE;
return;
}
String [] strData = (String[]) event.data;
String text = (String) strData[0];
if (event.item == null) {
MessageDialog.openWarning(Display.getCurrent().getActiveShell(), "哈哈！！", "哈哈哈！！！！你想多了。！！！功能太鸡肋，不开放！！");
} else {
TreeItem item = (TreeItem) event.item;
Object objItem = item.getData();
if(objItem instanceof ProjectGroup){
ProjectGroup group = (ProjectGroup) objItem;
ProjectDetail [] details = group.getProjectDetail();
String addProjectName = text.substring(text.lastIndexOf("\\")+1);
//	        	  genJar(addProjectName);
//	        	  ftpUpload();
if(details != null && details.length >0){
//判断是否存在
for(ProjectDetail detail : details){
if(addProjectName.equals(detail.getProjectName())){
return;
}
}
ProjectDetail detail1 = new ProjectDetail();
detail1.setProjectName(addProjectName);
detail1.setProjectStatus("0");
group.addProjectDetail(detail1);
treeViewer.refresh();
}else{
ProjectDetail detail1 = new ProjectDetail();
detail1.setProjectName(addProjectName);
detail1.setProjectStatus("0");
group.addProjectDetail(detail1);
treeViewer.refresh();
}
}
}

super.drop(event);
}

@Override
public boolean performDrop(Object data) {

return false;
}

@Override
public boolean validateDrop(Object target, int operation,
TransferData transferType) {
return true;
}

}

package public_project.view.dnd;

import org.eclipse.swt.dnd.DragSourceEvent;
import org.eclipse.swt.dnd.DragSourceListener;

public class ViewDragListener implements DragSourceListener{

@Override
public void dragStart(DragSourceEvent event) {
System.out.println();
}

@Override
public void dragSetData(DragSourceEvent event) {
System.out.println();
}

@Override
public void dragFinished(DragSourceEvent event) {
System.out.println();
}

}

int operations = DND.DROP_COPY | DND.DROP_MOVE;
Transfer[] transferTypes = new Transfer[]{FileTransfer.getInstance()};
treeViewer.addDropSupport(operations, transferTypes, new ViewDropListener(treeViewer));
treeViewer.addDragSupport(operations, transferTypes, new ViewDragListener());