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Seminar 9. Using Preloaders and Conditio... > Overview of Preloader or Gate Page

Overview of Preloader or Gate Page

For you to view a Macromedia Flash Web site over the Internet, the site needs to download or stream to the end-user’s machine. Depending on the size and com-plexity of the movie, this could be a matter of seconds or minutes. Today, many Flash developers use a preloader to entertain the site visitor while the rest of the site streams down in the background. The preloader lets the visitor know that the site hasn’t locked up and that he will soon be into the site. The preloader acts as a gate page, to disallow the visitor into the site until enough of the movie has streamed down, ensuring that the movie plays without glitches or unassigned delays. The site is experienced as it was designed. This seminar focuses on the creation of a preloader.

Preloader functionality can be composed of a short animation that plays continuously until enough of the site has streamed down to the end-user’s machine, or it can be just ActionScript that occurs behind the scene for checking to see how much of the site is downloaded to the end-user’s computer. A preloader is composed of a conditional loop that evaluates the streaming of the site and, based on whether the site is downloaded, determines when the rest of the movie can be played. ActionScript is used to create the conditional loop for this functionality.


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