DropMenu: passing characters to &post parameter [was with hover images]

I’m just hazzling around with DropMenu. After getting the collapsing/expanding stuff done by CSS (and thanks to the great tutorial!) I wonder how I could reproduce my legacy hover-effect. I used the Dropmenu &post parameter to inject the required code:
<img src="ar_grey.gif" class="passive" /><img src="ar_red.gif" class="active" />
Dropmenu placed the stuff at the right position, but, due to a special-character issue the code gets cut off just at the first "=" character.
Are there any escape characters for DropMenu/ModX parameter formatting, like a backslash or something like this?

Thanks for any advice!

Quote from: ppaulousek at Jun 17, 2006, 06:59 AM

Are there any escape characters for DropMenu/ModX parameter formatting, like a backslash or something like this?

In PHP, if you want to use double quotation marks inside a string that is already surrounded by double quotation marks, you prepend it with a backslash. The same thing applies to single quotations inside strings surrounded by single quotation marks.

So, replace this: <img src="ar_grey.gif" class="passive" />
with this: <img src=\"ar_grey.gif\" class=\"passive\" />

That should do the trick.

Thanks, but I tried this before. But unfortunately it did not do the job. I also put this stuff (escaped) in a chunk and passed this as the parameter.
The result was always the same:

<li class="here"><a href="index.php?id=1" title="Introduction to MODx">Home’<img src</a>

Seems that Dropmenu only accepts plain strings and does no escaping at all.

There is a way to pass that kind of thing to snippets, I seem to recall it in connection with the RSS feed snippets. You might want to check the forum for the discussions on them.

Quote from: ppaulousek at Jun 17, 2006, 08:55 AM

Thanks, but I tried this before. But unfortunately it did not do the job. I also put this stuff (escaped) in a chunk and passed this as the parameter.
The result was always the same:

<li class="here"><a href="index.php?id=1" title="Introduction to MODx">Home’<img src</a>

Seems that Dropmenu only accepts plain strings and does no escaping at all.

There’s a tick just after "Home" in the code above, that might be a clue. Could you copy and paste the exact way that you’re calling the snippet?

this is my chunk named "ahover":

’<img src\="ar_grey.gif" class\="passive" /><img src\="ar_red.gif" class\="active" />’

and this is the DropMenu-call:

[[DropMenu? &post={{ahover}}]]

and this is the result:

<li class="here"><a href="index.php?id=1" title="Introduction to MODx">Home’<img src\</a>

I’m still clueless, maybe I’m using the wrong "backtick"-character? I thought of diving into the Snippet-Code and put "rawurldecode($post)" in the return statement after having rawurlencoded the chunk ....

Why do you have your chunk HTML enclosed in single-quotes?

Since I use double-quotes within the content. But whatever I enclose the "&post" (or the chunk) in, and even if I don’t enclose it at all: Result is always a string cut off before the first "=" sign: <img src \". Escaping obviously doesn’t work, but I think it should...
:’(

I solved my issue by storing the chunk in rawurlencoded-format

and by replacing [tt]$post[/tt] in the return-statement of the Dropmenu-source with [tt]rawurldecode($post)[/tt].
I guess this is a type of hack, but as far as I can see there should be no drawback, since if no special characters are passed the encoding will return the string unchanged.
It simply enhances the scope of parameter-data which can be passed to Dropmenu.

Anyway: My html-source now looks as I want it to.

I was wondering why documents inside a folder do not get the $pre and $post data attached, so I looked and
found in the DropMenu code (line #250):

Adding the $pre and $post strings here fixed it, now all of the menu-items have their pre and post.
Strange, though. Why were those parameters omitted?