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  fredsa

Summary

Library providing easy to use drag-and-drop capabilities to Google Web Toolkit (GWT) projects.

Questions?

If you have questions, please post them on http://groups.google.com/group/gwt-dnd and I (or someone else) will try to answer them as best as possible. Using the forum means that others can benefit from any answers and feedback you get. It is always the fastest way to get an answer to a new question.

Is your project using drag and drop?

I'd like to know if you're using gwt-dnd on your project, and how useful (or not) this library is to you. You can send me an email at fred@allen-sauer.com.

Getting started with your own drag-and-drop projects

Read the wiki here: http://code.google.com/p/gwt-dnd/wiki/GettingStarted

Working examples

If a picture is worth a thousand words, then maybe a working demo is worth 1386 lines of source code?

Features

OOTB (Out of the Box) provided drag-and-drop or drag-and-move behaviors

DropController Description Example Use
SimpleDropController For simple drop targets which allows a widget to be dropped on them. A trash can icon.
AbsolutePositionDropController Drag-and-Move widgets around an AbsolutePanel. Moving drawing elements around on a flow chart.
GridConstrainedDropController Similar to AbsolutePositionDropController, but constrains the position of the draggable widgets to a specified grid. Allows for 'snap to grid' functionality.
IndexedDropController Allows you to move children among the elements of a supported IndexedPanel. The current GWT version provides this capability for DeckPanel, HorizontalPanel and VerticalPanel. The included helper class IndexedFlowPanel adds this capability to FlowPanel (although you have to use the helper subclass instead). WYSIWYG HTML editor.
BoundaryDropController All drag operations are ultimately constrained by a panel you specify. By default this panel is RootPanel.get() which means you can drag widgets over the entire page. For use as part of the gwt-dnd implementation.
NoOverlapDropController Does not allow widgets to overlap when dropped. WYSIWYG HTML layout editor.
FlexTableRowDropController Rearrange rows in a FlexTable. Users rearrange results of a query.
AbstractDropController Create your own controllers from this base class. Anything you can dream up.

Feedback

Please let me know what you think. Suggestions are always welcome.

Projects using gwt-dnd

Send me an email to add your project to this list.

Project Description
gwt-mosaic highly usable, feature rich toolkit for creating Rich Internet Applications and an easy to use API
Sliding Block Puzzle Solver You create the puzzle, and the computer solves it for you. You can find out how here.
Nouvelle Cuisine Build a web portal with no infrastructure; edit site content via an online Google Spreadsheet; that's it!
City Builder Build cities for Final Fantasy Crystal Chronicles
wibokr.com Dashboard, wiki & blog
MoonDisk.com Desktop-like online share platform and file manager with security, sharing and viewing features, and more ...
fabset Upload and organize your clothes.
chamaeleo A gwt based project management application with Gantt chart support and reports
scenechronize Film and television production software.
JustAToDoList.com Online To-Do List Manager.
gwt-diagrams Diagrams library for Google Web Toolkit (GWT).
Future Earth library Library of GWT Widgets.
MyHippocampus Take your ideas, knowledge, & influences and let you connect, visualize & store them in a way that turns them into building blocks, resources which you can draw upon to aid your creative endeavors.
Keywatch Free, open source monitoring system that provides the adaptability of a modern monitoring system without being complex or hard to configure.
gwt-scheduler GWT widget that provides an easy event scheduling UI.

Third Party gwt-dnd Tutorials

Other drag-and-drop projects

The following projects are not related to gwt-dnd. However, they may still be of interest to you if you have specific needs that these projects address.

Project Description
gwt-dnd-tree Project which extends the GWT TreeItem component, adding drag-and-drop support. Note, this is a separate project which does not utilize the gwt-dnd library.
dragmovedrop Provided as a patch to the GWT source code.
rocket-gwt GWT Extension library.

Other GWT projects by the same author

Project Description
gwt-voices Provides sound support for your GWT applications.
gwt-log Provides logging support for your GWT applications.

Commercial Support Options

Commercial support is available at http://allen-sauer.com/gwt/.