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Java Industry News Sneak Peek: Tapestry Palette - My First Eclipse Plugin
Sneak Peek: Tapestry Palette - My First Eclipse Plugin
By: Mike Henderson
Sep. 22, 2004 12:00 AM
In working with Tapestry I find myself getting confused by the number of
components and their parameters, even when using the excellent Spindle plugin. I
haven't written an Eclipse
plugin yet so I put together a plugin, building on the Spindle classes to browse
the components available in my project. The Palette consists of a tree of Tapestry components, organized by namespace. Selecting a component in the tree displays a summary in the lower part of the view showing the component description and listing required and optional parameters along with their descriptions. Once I got this far I looked into using the Palette as a source for component editing data. I reviewed the Eclipse drag and drop API and eclipse extensions for adding drag and drop functionality to existing views and editors. I was able to add drop functionality to the Spindle TemplateEditor so that dragging a component out of the Palette onto the editor inserts a <span> tag with an implicit component declaration, including attributes for required parameters at the current insertion point (you have to click in the editor at the point at which you want the component declaration to be inserted). If a range of text is selected and the dragged component allows a body the span will wrap the selection, otherwise an error dialog appears. Warning: The drop/editing code works on Linux but not on Mac OS X. This is my first cut at the plugin, there is only minimal error checking. The Palette requires that a Tapestry project (created with Spindle) is the current project and there is at least one open source code editor in the workspace when the Palette is opened. It refreshes too often and there are some issues with resizing the view. The plugin requires that the Spindle plugin is installed. Download the plugin: tapestry-palette-0.01.zip Unzip in your Eclipse install directory and restart Eclipse. To open the Palette use the Window > Show View > Other > Tapestry > Palette menu. Make sure a Tapestry project is the current project and at least one editor window is open.
I'd like to add support for adding component
declarations to the specification file, a wizard for setting component id and
parameter values and support for inserting tags other than <span> for
certain components, such as <input> tags for components representing form
elements.
Many of the components, especially in the contrib library are missing descriptions and many components, have no descriptions for their parameters. I'm working on getting the drag and drop working on Mac OS X so I can work on this on my powerbook.
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