MACROMEDIA DIRECTOR MX 2004-GETTING STARTED WITH DIRECTOR Uživatelský manuál stáhnout pdf (Strana 28)

WEBXTRA HELP: EVENTS

A new addition to WebXtra since version 4 is the concept of events. The Xtra sprite

will generate scripting events that are sent directly to scripts attached to it, and pass

the normal message chain in Director, reaching frame and movie scripts if they are

not handled at the sprite level. This avoids the need to poll the browser for

information continuously, as your scripts will be informed of any changes

necessary. All events pass the "spriteRef" as the first parameter, and this value can

be used to extract information about the sprite that generated the event directly.

Some events accept return values to indicate how the browser should react to a

specific situation. Using events it is possible for example to block the creation of

popup windows or authorize navigation to a specific link or URL, before it takes

place. If you need more information please study the "WebBrowser_Behavior"

script, attached to the "Complete Browser" example that ships with the Xtra. This is

a good example of a simple behavior showing how your scripts can intercept events

and act on them.

It is not necessary to implement a script to handle all events if you are not planning

to use them: the Xtra will assume default values if an event is not handled. You can

implement handlers only for the events that are appropriate for your movie, or you

can use the pre-made behaviors available at our site as a starting point for your own

scripts. Below are the events generated by WebXtra 4:

displayScrollBars(spriteRef) - Generated by the sprite when a browser window is

create or refreshed, to control the display of outer scroll bars in the main window

frame. Scripts can return FALSE to prevent scroll bars from appearing. The default

behavior of the browser is to automatically create scroll bars.

Lingo example:

on displayScrollBars spriteRef

return false

end

JavaScript syntax example:

function displayScrollBars(spriteRef){

return false

}

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MACROMEDIA DIRECTOR MX 2004-GETTING STARTED WITH DIRECTOR Uživatelský manuál Strana 28