Make a dropped data type depend on a target item in table : SWT Drag Drop « SWT « Java Tutorial

Java Tutorial
1. Language
2. Data Type
3. Operators
4. Statement Control
5. Class Definition
6. Development
7. Reflection
8. Regular Expressions
9. Collections
10. Thread
11. File
12. Generics
13. I18N
14. Swing
15. Swing Event
16. 2D Graphics
17. SWT
18. SWT 2D Graphics
19. Network
20. Database
21. Hibernate
22. JPA
23. JSP
24. JSTL
25. Servlet
26. Web Services SOA
27. EJB3
28. Spring
29. PDF
30. Email
31. J2ME
32. J2EE Application
33. XML
34. Design Pattern
35. Log
36. Security
37. Apache Common
38. Ant
39. JUnit
Java
Java Source Code / Java Documentation
Java Open Source
Jar File Download
Java Articles
Java Products
Java by API
Photoshop Tutorials
Maya Tutorials
Flash Tutorials
3ds-Max Tutorials
Illustrator Tutorials
GIMP Tutorials
C# / C Sharp
C# / CSharp Tutorial
C# / CSharp Open Source
ASP.Net
ASP.NET Tutorial
JavaScript DHTML
JavaScript Tutorial
JavaScript Reference
HTML / CSS
HTML CSS Reference
C / ANSI-C
C Tutorial
C++
C++ Tutorial
Ruby
PHP
Python
Python Tutorial
Python Open Source
SQL Server / T-SQL
SQL Server / T-SQL Tutorial
Oracle PL / SQL
Oracle PL/SQL Tutorial
PostgreSQL
SQL / MySQL
MySQL Tutorial
VB.Net
VB.Net Tutorial
Flash / Flex / ActionScript
VBA / Excel / Access / Word
XML
XML Tutorial
Microsoft Office PowerPoint 2007 Tutorial
Microsoft Office Excel 2007 Tutorial
Microsoft Office Word 2007 Tutorial
Java Tutorial » SWT » SWT Drag Drop 
17. 114. 10. Make a dropped data type depend on a target item in table
Make a dropped data type depend on a target item in table
/*******************************************************************************
 * Copyright (c) 2000, 2005 IBM Corporation 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
//package org.eclipse.swt.snippets;
/*
 * Make a dropped data type depend on a target item in table
 
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 */
import java.io.File;

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.FileTransfer;
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.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableItem;

public class DropTypeOnTable {

  public static void main(String[] args) {
    Display display = new Display();
    Shell shell = new Shell(display);
    shell.setLayout(new FillLayout());
    Label label1 = new Label(shell, SWT.BORDER);
    label1.setText("Drag Source");
    final Table table = new Table(shell, SWT.BORDER);
    for (int i = 0; i < 4; i++) {
      TableItem item = new TableItem(table, SWT.NONE);
      if (i % == 0)
        item.setText("Drop a file");
      if (i % == 1)
        item.setText("Drop text");
    }
    DragSource dragSource = new DragSource(label1, DND.DROP_COPY);
    dragSource
        .setTransfer(new Transfer[] { TextTransfer.getInstance(), FileTransfer.getInstance() });
    dragSource.addDragListener(new DragSourceAdapter() {
      public void dragSetData(DragSourceEvent event) {
        if (FileTransfer.getInstance().isSupportedType(event.dataType)) {
          File file = new File("temp");
          event.data = new String[] { file.getAbsolutePath() };
        }
        if (TextTransfer.getInstance().isSupportedType(event.dataType)) {
          event.data = "once upon a time";
        }
      }
    });
    DropTarget dropTarget = new DropTarget(table, DND.DROP_COPY | DND.DROP_DEFAULT);
    dropTarget
        .setTransfer(new Transfer[] { TextTransfer.getInstance(), FileTransfer.getInstance() });
    dropTarget.addDropListener(new DropTargetAdapter() {
      FileTransfer fileTransfer = FileTransfer.getInstance();

      TextTransfer textTransfer = TextTransfer.getInstance();

      public void dragEnter(DropTargetEvent event) {
        if (event.detail == DND.DROP_DEFAULT)
          event.detail = DND.DROP_COPY;
      }

      public void dragOperationChanged(DropTargetEvent event) {
        if (event.detail == DND.DROP_DEFAULT)
          event.detail = DND.DROP_COPY;
      }

      public void dragOver(DropTargetEvent event) {
        event.detail = DND.DROP_NONE;
        TableItem item = (TableItemevent.item;
        if (item == null)
          return;
        int itemIndex = table.indexOf(item);
        if (itemIndex % == 0) {
          int index = 0;
          while (index < event.dataTypes.length) {
            if (fileTransfer.isSupportedType(event.dataTypes[index]))
              break;
            index++;
          }
          if (index < event.dataTypes.length) {
            event.currentDataType = event.dataTypes[index];
            event.detail = DND.DROP_COPY;
            return;
          }
        else {
          int index = 0;
          while (index < event.dataTypes.length) {
            if (textTransfer.isSupportedType(event.dataTypes[index]))
              break;
            index++;
          }
          if (index < event.dataTypes.length) {
            event.currentDataType = event.dataTypes[index];
            event.detail = DND.DROP_COPY;
            return;
          }
        }
      }

      public void drop(DropTargetEvent event) {
        TableItem item = (TableItemevent.item;
        if (item == null) {
          event.detail = DND.DROP_NONE;
          return;
        }
        if (fileTransfer.isSupportedType(event.currentDataType)) {
          String[] files = (String[]) event.data;
          if (files != null && files.length > 0) {
            item.setText(files[0]);
          }
        }
        if (textTransfer.isSupportedType(event.currentDataType)) {
          String text = (Stringevent.data;
          if (text != null) {
            item.setText(text);
          }
        }
      }

    });
    shell.setSize(300150);
    shell.open();
    while (!shell.isDisposed()) {
      if (!display.readAndDispatch())
        display.sleep();
    }
    display.dispose();
  }
}
17. 114. SWT Drag Drop
17. 114. 1. Dragging and Dropping
17. 114. 2. Drag selected text in Text to LabelDrag selected text in Text to Label
17. 114. 3. Drag and Drop inside TableDrag and Drop inside Table
17. 114. 4. Drag and Drop example snippet: determine data types available (win32 only)Drag and Drop example snippet: determine data types available (win32 only)
17. 114. 5. Drag and Drop: define a default operation (in this example, Copy)Drag and Drop: define a default operation (in this example, Copy)
17. 114. 6. Drag and Drop: define my own data transfer typeDrag and Drop: define my own data transfer type
17. 114. 7. Drag leaf items in a treeDrag leaf items in a tree
17. 114. 8. Drag text between two labelsDrag text between two labels
17. 114. 9. Drag and Drop: determine native data types available (motif only)
17. 114. 10. Make a dropped data type depend on a target item in tableMake a dropped data type depend on a target item in table
www.java2java.com | Contact Us
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.