With a few caveats, this code mostly works. Basically I take a stream of
tiddlers sorted by the "created" field, and then insert a year/month label
whenever the year/month changes.
!!! breaker test
<$macrocall $name=breaker variable="myvar" input="n/a" pos=6 reset="y"
ending="" />
<$list filter="[tag[Journal]!is[system]has[created]sort[created]]">
<b><$macrocall $name=breaker variable="myvar" input={{!!created}} pos=6
reset="N" ending="<br/>" /> </b>
<$view field="title"/><br/>
</$list>
So if you want the sub-lists to be sorted in a different order than the
month data ... you're out of luck.
This is the only way I could find to do it without actually writing a
widget that does it all. Widgets are messy to write -- at least at this
point in my TW5 development. What I used instead was a javascript macro to
break out labels. Code below. There are several parameters
(variable,input,pos,ending,reset) that you need to pass to the macro. I can
document them a little better if people find they are actually using the
code. I figure this is more of a starter kit.
Something to be aware of is that the creation date field may not be the
field you want. It apparently shows the UTC date of the actual moment the
tiddler created, which may not be the same as the journal date. In fact,
depending on where you live, it may be be on a different day than than the
day in the tiddler title. When I created a journal tiddler at night, for
instance, the creation date was already on the following day. For this
reason, it might be better to alter the Journal template code to create and
update a separate "journaldate" field that has the datestamp in a form that
matches the journal title.
Javascript macros are tiddlers that have their type set to
"javascript/application" and an addtional module-type field of "macro". Be
absolutely sure to backup your data before trying this, because a single
byte mistake can crash your TW, requiring you to manually edit the tw file
with a text editor.
The breaker macro gets called once before the listing begins to clear out a
global variable and then called in a second way inside the listing.
By looking at the code, I think you can readily see how to change it if you
want a different way of representing months/years. Here's the code for the
breaker:
/*\
title: $:/MAS/breaker.js
type: application/javascript
author: MAS
module-type: macro
Break when first n characters of parameter change. User needs to reset.
\*/
(function(){
/*jslint node: true, browser: true */
/*
Information about this macro
*/
exports.name = "breaker";
exports.params = [{name:"variable",default:"masstuff"},{name:"input",default
:""},{name: "pos",default:0},{name:"ending",default:""},{name:"reset",
default:"n"}];
/*
Run the macro
*/
exports.run = function() {
var variable=arguments[0] ;
var input = arguments[1] ;
var pos = arguments[2] ;
var ending = arguments[3] ;
var reset = arguments[4] ;
/* For reset at start of loop */
if(reset==="y" || reset==="Y") {
$tw[variable]=input ;
return "" ;
}
var slc = input.slice(0,pos) ;
var twslc = $tw[variable] ;
if(slc==twslc) { return "" ; }
$tw[variable] = slc ;
var year = slc.slice(0,4) ;
var mo={"01":"January","02":"February","03":"March" ,"04":"April" ,"05":
"May" ,"06":"June","07":"July","08":"August","09":"September","10":"October"
,"11":"November","12":"December"}[slc.slice(4,6)] ;
return year+" "+mo+ending ;
};
})();
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