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I had to create a Presentation some days ago. As we needed a little slideshow of pictures, within that presentation, I decided to create a little Sliteshow with OpenLaszlo. Maybe it’s useful for you, so you can use it under the terms of the GPL.

Here is a little Example, created with “Visualslider”:
Visualslider.swf

And this one ist quite the same, but with Slides sliding “circles”:
Visualslider_c.swf

You can click on the Slides, to navigate through them. Also you can use the cursor keys, to do the same. With the key “t” you can toggle between automatical sliding and manual sliding.

And here is the source code:
visualslider.lzx (2009-07-06)

A little Documentation:

<visualslider>

• Description:
  The container view
• Attributes:
  currentslide – (readonly) returns the selected slide
  slideduration – the time in ms for the slide-animation
  circular – boolean for circular-sliding
  timerms – the time in ms for automatical sliding
  istimerstarted – (readonly) returns a boolean whether automatical sliding is started or not
• Methods:
  slideUp() – select next slide
  slideDown() – select previous slide
  slideTo(n) – select the nth slide
  startTimer() – start automatical sliding
  stopTimer() – stop automatical sliding

<visualsliderview>

• Description:
  A slider-view. Must be placed in <visualslider>
• Attributes:
  originalwidth – the 100%-width of the view
  originalheight – the 100%-height of the view
  currentslide – (readonly) returns a boolean whether this visualsliderview is selected or not
  shadow – boolean to display a shadow under the visualsliderview
  factor – (readonly) returns a scale-factor with reference to originalwidth and originalheight (useful to scale subviews)
  slidenumber – (readonly) returns the number of the slider
• Events:
  onstop – Fires when the animation is finished
  onstart – Fires when the animation is started

Here you can find the zipped source code of the example. This may be helpful to create your own slideshow:
visualslider.tar (2009-07-06)