What you really want to keep track of is, probably, the NAME OF THE FRAME
where the user was before he/she clicked your Next button or made some
other choice, e. g. from a menu of frames or features.
Frames have numbers, but you may also give every frame a name or label. You
can type these labels in the Score, in the line above the sprite
channels... You'd better look at your manual where it has pictures that
illustrate frame labels.
Sure, you can save the name of the last frame your user visited in a global
variable, as you seem to be doing. Make sure you spell the name
consistently, e.g.
global gPreviousFrame
gPreviousFrame = "MyOpeningFrame"
The "on mouseDown" handler is not the best place for saving the frame's
label in your global variable. Better put this in each frame's script:
on beginSprite me
global gPreviousFrame
gPreviousFrame = the frameLabel
end beginSprite
That way, the value of gPreviousFrame will always be accurate.
If you create a button for the user to go back to where he was just before,
that buttons's script should be like this:
on mouseDown me
global gPreviousFrame
go to frame gPreviousFrame
end mouseDown
This scheme, of course, will only let your user go one step back, because
you're saving only one "previous" frame name. It is probably more useful to
save the entire sequence of frames that the user has visited. To do that,
you need to learn about linear lists. Then your global variable may be,
e.g., a list like this one:
["MyOpeningFrame", "TheLastFrame", "TheGlossaryFrame", "HelpFrame"]
and your user can go back one step or forward one step from any frame.
Slava
At 04:15 AM 9/9/2001 +0000, you wrote:
>Hi,
>
>If I wanted to keep track of the previous screen,
>
>
>my movie script reads:
>
>global gPreviousScreen
>on StartMovie
>set gPrevious = 0
>end StartMovie
>
>
>
>my sprite script ( which is a left arrow button) reads:
>
>on mousedown
>global gPreviousScreen
>CurrScreen = sprite(6) -gPreviousScreen
>sprite(6) =CurrScreen
>updatestage
>end
>
>
>Is this the way to keep track?
>
>
>Thanks for your help!
>
>
>
>
>
>
>
>
>
>
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