// gallery_xds.js - version 0.1 - Spry Pre-Release 1.6.1

//

// Copyright (c) 2006. Adobe Systems Incorporated.

// All rights reserved.

// Redistribution and use in source and binary forms, with or without

// modification, are permitted provided that the following conditions are met:

//

//   * Redistributions of source code must retain the above copyright notice,

//     this list of conditions and the following disclaimer.

//   * Redistributions in binary form must reproduce the above copyright notice,

//     this list of conditions and the following disclaimer in the documentation

//     and/or other materials provided with the distribution.

//   * Neither the name of Adobe Systems Incorporated nor the names of its

//     contributors may be used to endorse or promote products derived from this

//     software without specific prior written permission.

//

// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE

// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

// POSSIBILITY OF SUCH DAMAGE.



// Create a data filter that will add some custom columns to

// our data set that the region template will make use of. Using

// our own custom column allows our template to be agnostic to the

// format of the data loaded by the data set. Of course this function

// will need to be modified if the developer uses one of their own custom

// data formats.



function PhotosFilter(ds, row, rowIndex)

{

	// The regions that use our data set expect 2 columns to exist. They

	// are the "path" and "thumbpath" columns which must contain complete

	// paths which are relative to the HTML page, or site relative, to the

	// images to load.

	// 

	// Since the XML file that Photoshop outputs splits the the directory path

	// and the image filename across different nodes in the XML tree. We need

	// to merge them into a single column value so things are easier to deal

	// with. We need to do the same for the thumbnail image.



	row.path = row["large/@base"] + row["photos/photo/@path"];

	row.thumbpath = row["thumbnail/@base"] + row["photos/photo/@thumbpath"];

	return row;

}



// Create a data set that will load the XML that describes all of

// the photos in our initial gallery. Make sure that the data set uses

// our PhotosFilter() function so that anytime data is loaded, our

// custom columns are created.



var dsPhotos = new Spry.Data.XMLDataSet("gallery-all.xml", "/gallery", { subPaths: "photos/photo", filterDataFunc: PhotosFilter });



// Register an onPostUpdate observer on the "thumbnails" region of the page.

// Anytime the markup for the region gets regenerated, we need to re-attach

// the thumbnail behaviors and reset the current thumbnail to the first one

// in the viewer.



Spry.Data.Region.addObserver("thumbnails", { onPostUpdate: function()

{

	if (gThumbViewer)

	{

		// The thumbnails region has been updated with

		// new content. If gThumbViewer is not null, we

		// know that we already created our widgets, so

		// all we really have to do, is make sure that the

		// thumb viewer adds the grow, shrink, and click

		// behaviors to the new thumbnails.



		gThumbViewer.attachBehaviors();

		gThumbViewer.select(0);

		return;

	}



	// The thumbnails region has updated for the very first

	// time, so lets create the gallery widgets. After this

	// call, gThumbViewer should be non-null, so we should

	// never hit this code again.



	InitializeGallery();



	// Now that we've created our widgets, override the default

	// link behavior for each link in the galleryLinks section

	// so that they load new XML into our dsPhotos data set instead

	// of taking us to new pages.



	Spry.$$("#galleryLinks a").addEventListener("click", function(e)

	{

		gSlideShowControl.stop();

		dsPhotos.setURL(this.href);

		dsPhotos.loadData();

		return false;

	}, false);

}});