Picasa Web Albums have added an embeddable slideshow to their feature set. The slideshow uses Flash, and an option to create one shows up when you are logged in and viewing one of your albums - the option to "Embed Slideshow" now appears above the "Link to this Album" entry in the left sidebar. When you chose the "Embed Slideshow" link it pops up a small wizard that allows you to set the size the photos show at, and also whether captions are shown or not. The results of this is to give you a scrap of HTML that you can paste into a blog entry or a webpage.
The resultant slideshow shows your images, but does have a permanent Picasa shutter image in the bottom right hand corner obscuring part of your photos. To make it worse, its not just the shutter image, but also an "arty" turned over corner, that takes up even more of your image area - I'm not inclined to use the feature with that there all the time. This is obviously aimed fairly squarely at the My Space user - though My Space have taken action before over advertisements appearing in such widgets.
When you mouse over the slideshow, additional controls appear, allowing you to pause, step forward, or step back, and to turn captions on or off. There is also a link to the photo albums of the user whose images are shown in the slideshow - though in Firefox 2 at least this link is ineffectual since Firefox rightly prevents such popups from occurring (since Flash applications are notorious for causing those horrible advertising popups we have grown to hate). Clicking on the shutter icon turns the slideshow into a text info page - and this shows a little more info about the person whose photos are being shown - and a manual link to the album itself (this is not blocked by Firefox, since it requires a manual click to happen before the link is followed). One nice touch of this text view is that (despite being in Flash which normally does away with all the web browser conventions we expect), right clicking on the link does offer an "open in new window" option - of course in Firefox you really want the twin options of open in new window or open in new tab, but its nice that at least some thought has been made about this.
PicasaWeb has a help page about this feature.
Customizing the Slideshow
The popup wizard offers you a choice of sizes for the slideshow, and also whether captions are shown or not. However by manually editing the HTML fragment it produces, further customization is possible.
The HTML is of the form
<embed
type="application/x-shockwave-flash"
src="http://picasaweb.google.com/s/c/bin/slideshow.swf"
flashvars="host=picasaweb.google.com&captions=1&RGB=0x000000&feed=http%3A%2F%2Fpicasaweb.google.com%2Fdata%2Ffeed%2Fapi%2Fuser%2Ftester%2Falbumid%2F5061951474333359457%3Fkind%3Dphoto%26alt%3Drss%26authkey%3D3V8IljiqEO0"
pluginspage="http://www.macromedia.com/go/getflashplayer"
height="192"
width="288">
Easy manual customizations are to:
- adjust the height and width parameters (and yes you can use numbers other than those the wizard offers)
- change the background colour - which is specified as black above via the RBG=0x000000 setting