if then else

Hi, I hope the group can help me out again.
I would like to use variables and condition them with if,
else, endif,
set, print macros. In other words all the wizz-bang stuff in
tweebox.

However I want the full control of my own Tiddlywiki so I
can have all
sort of other plugins, e.g BreadcrumbsPlugin,
SinglePageModePlugin,
and a host of others. Plus Tweebox seems to be missing
control of
setting variables, e.g. the <<option>> macro.
Not being able to input
the variables is a show stopper for my project.

Does someone have <<If>>, <<else>>,
<<endif>> <<set>>, and
<<print>>
macros which can be used in TW 2.x?

Or alternately, is the guy who developed Tweebox and Jonah
following
this group? If so would those macros be available so I can
take the
code and implement them into the latest TW version?

Thanks,
Joe


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> I would like to use variables and condition them with
if, else, endif,
> set, print macros. In other words all the wizz-bang
stuff in tweebox.

I'm not very familiar with Tweebox, so that might explain
why I don't 
fully understand what you need.
Generally speaking, conditional statements can be
implemented using 
JavaScript code - so either with evaluated parameters (see
[1]) or with 
inline scripting ([2]).

Could you give us a concise example of what you need to do?


-- F.


[1] http://tinyurl.com/yw59q8 
(http://groups.google.com/group/TiddlyWiki/browse_thr
ead/thre
ad/991885b303b11360)

[2] ht
tp://www.TiddlyTools.com/#InlineJavascriptPlugin

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Hmmmm, I'll have to investigate the InlineJavaScriptPlugin.
I've heard
banter about it, true, but hadn't thought it applied to what
I need.

Okay, here's what I want to do: This is a simplified example
using the
Tweebox syntax:

You are standing at the edge of a cliff, there is nowhere to
run.
Trolls are chasing you.
[[Fight Trolls]]
<<if $haveMountainClimbingGear >>
Or you can climb down the cliff with the mountain climbing
gear you
had the foresight to bring with you.
[[Descend Cliff]]
<<endif>>

And of course, in some previous tiddler there would be a
macro
assigning true to $haveMountainClimbingGear if the
appropriate
conditions there are met.


On Oct 14, 3:58 pm, FND <Ace_No...gmx.net> wrote:
> > I would like to use variables and condition them
with if, else, endif,
> > set, print macros. In other words all the
wizz-bang stuff in tweebox.
>
> I'm not very familiar with Tweebox, so that might
explain why I don't
> fully understand what you need.
> Generally speaking, conditional statements can be
implemented using
> JavaScript code - so either with evaluated parameters
(see [1]) or with
> inline scripting ([2]).
>
> Could you give us a concise example of what you need to
do?
>
> -- F.
>
> [1]http://tinyurl.com/yw59q8
> (http://groups.google.com/group/TiddlyWiki/browse_thr
ead/thre
> ad/991885b303b11360)
>
> [2]ht
tp://www.TiddlyTools.com/#InlineJavascriptPlugin


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> Hmmmm, I'll have to investigate the
InlineJavaScriptPlugin. I've heard
> banter about it, true, but hadn't thought it applied to
what I need.

Using
   ht
tp://www.TiddlyTools.com/#InlineJavascriptPlugin
your example could be written this way:
-----
You are standing at the edge of a cliff, there is nowhere to
run.
Trolls are chasing you.
[[Fight Trolls]]
{{hidden{
<script>if(haveMountainClimbingGear)place.style.displa
y="block";</
script>
Or you can climb down the cliff with the mountain climbing
gear you
had the foresight to bring with you.
[[Descend Cliff]]
}}}

where:
"hidden" is a CSS class, defined as:
   .hidden { display:none; }
and
   haveMountainClimbingGear is a javascript variable, which
is set in
some other tiddler by using this javascript code:
  
<script>haveMountainClimbingGear=true;</script>

HTH,
-e
Eric Shulman
TiddlyTools / ELS Design Studios


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Thanks, I'll give it a try right now!!!

On Oct 14, 6:47 pm, Eric Shulman <elsdes...gmail.com> wrote:
> > Hmmmm, I'll have to investigate the
InlineJavaScriptPlugin. I've heard
> > banter about it, true, but hadn't thought it
applied to what I need.
>
> Using
>    ht
tp://www.TiddlyTools.com/#InlineJavascriptPlugin
> your example could be written this way:
> -----
> You are standing at the edge of a cliff, there is
nowhere to run.
> Trolls are chasing you.
> [[Fight Trolls]]
> {{hidden{
>
<script>if(haveMountainClimbingGear)place.style.displa
y="block";</
> script>
> Or you can climb down the cliff with the mountain
climbing gear you
> had the foresight to bring with you.
> [[Descend Cliff]]
>
> }}}
>
> where:
> "hidden" is a CSS class, defined as:
>    .hidden { display:none; }
> and
>    haveMountainClimbingGear is a javascript variable,
which is set in
> some other tiddler by using this javascript code:
>   
<script>haveMountainClimbingGear=true;</script>
>
> HTH,
> -e
> Eric Shulman
> TiddlyTools / ELS Design Studios


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Simon, in your example, how is

 haveMountainClimbingGear

defined?

also the " <<endif>> " was just
included by mistake, right? (I didn't
see a preceeding "if" anywhere)



Eric, Is there an advantage to using inline javascript for
this kind
of thing, or is it just preference?


Thanks to both of you in advance,
 DP


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The only way I know how to define a variable is going into
the TW file
and adding a line under
config.options = {
What's a better way to define a variable, because this
doesn't seem to
be working.

Is this a definition?
<<showWhen
store.fetchTiddler("Inventory").tags.contains(&quo
t;MountainClimbingGear")
If so, where does it go? StyleSheets or some place like
that?

Your 3 examples leave me a bit confused. I can enter either
style of
syntax right into the code?

thanks, Joe

On Oct 15, 3:16 pm, "Simon Baird"
<simon.ba...gmail.com> wrote:
> On 10/15/07, Dave Parker <cedar...telus.net> wrote:
>
>
>
> > Simon, in your example, how is
>
> > haveMountainClimbingGear
>
> defined?
>
> No idea really. But something more practical might look
like this:
>
> <<showWhen
store.fetchTiddler("Inventory").tags.contains(&quo
t;MountainClimbingGear")
>
>
>
> (use tags in a particular tiddler to indicate the items
carried).
>
> Or this:
> <<showWhen
hasInventoryItem("MountainClimingGear") >>
>
> (Make up your own function. Requires some coding)
>
> also the " <<endif>> " was just
included by mistake, right? (I didn't
>
> > see a preceeding "if" anywhere)
>
> Oh yeah sorry. Pasting error.
>
> But note that the corresponding example using the
hideIfShowIf plugin from
> here:http://rgplugins.tiddlyspot.com/#%5B%5BhideIfs
howIf%20plugin%5D%5D
> look like this:
>
> <<showIf
hasInventoryItem("MountainClimingGear")>>
> [[Descend Cliff]]
> <<endIf>>
>
> Which is more readable.
>
> However (for those still with me), I think some kind of
a preprocessing
> language might be of use for many TiddlyWiki
applications, eg:
>
> C style:
>
> #if hasInventoryItem("MountainClimingGear")
> [[Descend Cliff]]
> #endif
>
> jsp/asp style maybe:
>
> <% if
(hasInventoryItem("MountainClimingGear")) { %>
> [[Descend Cliff]]
> <% } %>
>
> this one is good because it's using javascript (not a
made up syntax).
>
> <% if
(hasInventoryItem("MountainClimingGear")) { %>
> You have ropes. You may [[Descend Cliff]]
> <% } else { %>
> In desperation you can [[Jump]].
> <% } %>
>
> Eric, do you think InlineJavascript could be made to
work in this way, eg?
>
> <script>if
(hasInventoryItem("MountainClimingGear"))
</script>
> [[Descend Cliff]]
> <script> } </script>
>
> Simon.
>
> --
> simon.ba...gmail.com


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> The only way I know how to define a variable is going
into the TW file
> and adding a line under config.options = {

Hacking the source is generally a bad idea.
Instead, you could create a new tiddler to initialize your
variables: 
Tag it with "systemConfig", then add something
like this:
     foo = {};
     foo.bar = "baz";
* "foo" would be your global category (e.g.
"textAdventure")
* "bar" would be the name of your variable (e.g.
"inventory")
* "baz" would be the desired value (e.g.
"MountainClimbingGear")

> Is this a definition?
> <<showWhen
>
store.fetchTiddler("Inventory").tags.contains(&quo
t;MountainClimbingGear")
> If so, where does it go? StyleSheets or some place like
that?

No, that checks whether the tiddler "Inventory"
contains a tag 
"MountainClimbingGear".
Using InlineJavaScriptPlugin, you could update your variable
in any 
tiddler by inserting something like
     <script>foo.bar =
"zab";</script>
However, making this conditional (so it's only executed,
say, when the 
user clicks a button) will require some thinking - and most
likely at 
least basic coding skills.

> Your 3 examples leave me a bit confused. I can enter
either style of
> syntax right into the code?

I think Simon was just thinking aloud there, suggesting a
framework for 
a potential plugin...


-- F.

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