Java by API/org.eclipse.swt.dnd/DragSource

DragSource: addDragListener(DragSourceListener lis)

   <source lang="java">

import org.eclipse.swt.SWT; import org.eclipse.swt.dnd.DND; import org.eclipse.swt.dnd.DragSource; import org.eclipse.swt.dnd.DragSourceAdapter; import org.eclipse.swt.dnd.DragSourceEvent; import org.eclipse.swt.dnd.DropTarget; import org.eclipse.swt.dnd.DropTargetAdapter; import org.eclipse.swt.dnd.DropTargetEvent; import org.eclipse.swt.dnd.TextTransfer; import org.eclipse.swt.dnd.Transfer; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.Table; import org.eclipse.swt.widgets.TableColumn; import org.eclipse.swt.widgets.TableItem; public class MainClass {

 public static void main(String[] a) {
   final Display display = new Display();
   final Shell shell = new Shell(display);
   shell.setSize(250, 200);
   shell.setLayout(new FillLayout());
   Table table = new Table(shell, SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL);
   Transfer[] types = new Transfer[] { TextTransfer.getInstance() };
   DragSource source = new DragSource(table, DND.DROP_MOVE | DND.DROP_COPY);
   source.setTransfer(types);
   source.addDragListener(new DragSourceAdapter() {
     public void dragSetData(DragSourceEvent event) {
       DragSource ds = (DragSource) event.widget;
       Table table = (Table) ds.getControl();
       TableItem[] selection = table.getSelection();
       StringBuffer buff = new StringBuffer();
       for (int i = 0, n = selection.length; i < n; i++) {
         buff.append(selection[i].getText());
       }
       event.data = buff.toString();
     }
   });
   DropTarget target = new DropTarget(table, DND.DROP_MOVE | DND.DROP_COPY | DND.DROP_DEFAULT);
   target.setTransfer(types);
   target.addDropListener(new DropTargetAdapter() {
     public void dragEnter(DropTargetEvent event) {
       if (event.detail == DND.DROP_DEFAULT) {
         event.detail = (event.operations & DND.DROP_COPY) != 0 ? DND.DROP_COPY : DND.DROP_NONE;
       }
       for (int i = 0, n = event.dataTypes.length; i < n; i++) {
         if (TextTransfer.getInstance().isSupportedType(event.dataTypes[i])) {
           event.currentDataType = event.dataTypes[i];
         }
       }
     }
     public void dragOver(DropTargetEvent event) {
       event.feedback = DND.FEEDBACK_SELECT | DND.FEEDBACK_SCROLL;
     }
     public void drop(DropTargetEvent event) {
       if (TextTransfer.getInstance().isSupportedType(event.currentDataType)) {
         DropTarget target = (DropTarget) event.widget;
         Table table = (Table) target.getControl();
         String data = (String) event.data;
         TableItem item = new TableItem(table, SWT.NONE);
         item.setText(new String[] { data });
         table.redraw();
       }
     }
   });
   TableColumn column = new TableColumn(table, SWT.NONE);
   TableItem item = new TableItem(table, SWT.NONE);
   item.setText(new String[] { "A" });
   item = new TableItem(table, SWT.NONE);
   item.setText(new String[] { "B" });
   item = new TableItem(table, SWT.BORDER);
   item.setText(new String[] { "C" });
   column.pack();
   shell.open();
   while (!shell.isDisposed()) {
     if (!display.readAndDispatch())
       display.sleep();
   }
   display.dispose();
 }

}

      </source>
   
  
 
  

new DragSource(Control control, int style)

   <source lang="java">

import org.eclipse.swt.SWT; import org.eclipse.swt.dnd.DND; import org.eclipse.swt.dnd.DragSource; import org.eclipse.swt.dnd.DragSourceAdapter; import org.eclipse.swt.dnd.DragSourceEvent; import org.eclipse.swt.dnd.DropTarget; import org.eclipse.swt.dnd.DropTargetAdapter; import org.eclipse.swt.dnd.DropTargetEvent; import org.eclipse.swt.dnd.TextTransfer; import org.eclipse.swt.dnd.Transfer; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.Table; import org.eclipse.swt.widgets.TableColumn; import org.eclipse.swt.widgets.TableItem; public class MainClass {

 public static void main(String[] a) {
   final Display display = new Display();
   final Shell shell = new Shell(display);
   shell.setSize(250, 200);
   shell.setLayout(new FillLayout());
   Table table = new Table(shell, SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL);
   Transfer[] types = new Transfer[] { TextTransfer.getInstance() };
   DragSource source = new DragSource(table, DND.DROP_MOVE | DND.DROP_COPY);
   source.setTransfer(types);
   source.addDragListener(new DragSourceAdapter() {
     public void dragSetData(DragSourceEvent event) {
       DragSource ds = (DragSource) event.widget;
       Table table = (Table) ds.getControl();
       TableItem[] selection = table.getSelection();
       StringBuffer buff = new StringBuffer();
       for (int i = 0, n = selection.length; i < n; i++) {
         buff.append(selection[i].getText());
       }
       event.data = buff.toString();
     }
   });
   DropTarget target = new DropTarget(table, DND.DROP_MOVE | DND.DROP_COPY | DND.DROP_DEFAULT);
   target.setTransfer(types);
   target.addDropListener(new DropTargetAdapter() {
     public void dragEnter(DropTargetEvent event) {
       if (event.detail == DND.DROP_DEFAULT) {
         event.detail = (event.operations & DND.DROP_COPY) != 0 ? DND.DROP_COPY : DND.DROP_NONE;
       }
       for (int i = 0, n = event.dataTypes.length; i < n; i++) {
         if (TextTransfer.getInstance().isSupportedType(event.dataTypes[i])) {
           event.currentDataType = event.dataTypes[i];
         }
       }
     }
     public void dragOver(DropTargetEvent event) {
       event.feedback = DND.FEEDBACK_SELECT | DND.FEEDBACK_SCROLL;
     }
     public void drop(DropTargetEvent event) {
       if (TextTransfer.getInstance().isSupportedType(event.currentDataType)) {
         DropTarget target = (DropTarget) event.widget;
         Table table = (Table) target.getControl();
         String data = (String) event.data;
         TableItem item = new TableItem(table, SWT.NONE);
         item.setText(new String[] { data });
         table.redraw();
       }
     }
   });
   TableColumn column = new TableColumn(table, SWT.NONE);
   TableItem item = new TableItem(table, SWT.NONE);
   item.setText(new String[] { "A" });
   item = new TableItem(table, SWT.NONE);
   item.setText(new String[] { "B" });
   item = new TableItem(table, SWT.BORDER);
   item.setText(new String[] { "C" });
   column.pack();
   shell.open();
   while (!shell.isDisposed()) {
     if (!display.readAndDispatch())
       display.sleep();
   }
   display.dispose();
 }

}

      </source>