From MediaWiki.org

You may see this example live at wiki.swiftlytilting.com

Contents 1 Winter 2.0 1.1 Code 2 Winter 1.5 2.1 Code 2.2 Explanation

[edit] Winter 2.0

The following code is valid for Winter 2.1.0 and above

[edit] Code

{{#nocache}}

{{#
||    Initialize variables and functions 
}}

{{#function | ShowDay || 
   {{#if | {{#1 != 00}} ||
      {{#if | {{#1 != {{CURRENTDAY}} }} ||
         <span style=";;padding:.25em; margin:.5em; 
         margin-bottom:1.5em;margin-right:.5em; width:2em;">
      ||
         <span style="background-color:#ccccff;;padding:.25em; margin:.5em; margin-bottom:1.5em;margin-right:.5em; width:2em;">
      }}
   ||
      <span style="background-color:#ffffff;color:#ffffff;padding:.25em; margin:.5em; 
      margin-bottom:1.5em;margin-right:.5em; width:2em;">
   }}{{#1}}</span>
}}

{{#array | month | 31 |  28 | 31 | 30 | 31 | 30 | 31 |  31 |  30 |  31 |  30 |  31 }}
{{#days_in_month | @= | {{#month | {{#op {{CURRENTMONTH}} - 1 }} }} }}
{{#WeekStart | @= | {{#op | 8 - ( ( {{CURRENTDAY}}  -  {{CURRENTDOW}} ) mod  7 ) }} }}

{{#
||    Draw calendar 
}}

<div style="border:1px solid black;width:22em;text-align:center;padding-bottom:.5em">{{#showday | {{CURRENTMONTHNAME}} {{CURRENTYEAR}} }}

{{#for | {{#i = 0}} || {{#i | < | {{#WeekStart}} }} || {{#i ++}} || 
   {{#ShowDay| 00 }} 
}}
{{#for | {{#day = 1}} ||  {{#day | <= | {{#days_in_month}} }} || {{#null}} ||
   {{#for | {{#i | = | {{#WeekStart}} }} || {{#i < 7}} || {{#i ++}} {{#day ++}}  ||
      {{#ShowDay | {{#if | {{#day | > | {{#days_in_month}} }} || 00 || {{#if | {{#day < 10}} || 0}}{{#day}} }} }} 
   }}

   <div style="clear:left"> </div>
   {{#WeekStart @= 0}} 
}}

</div>

[edit] Winter 1.5

The following code is valid for Winter 1.3 and above.

[edit] Code

{{#nocache}}
{{#setvar| MONTH_01 | 31 }}
{{#setvar| MONTH_02 | 28 }}
{{#setvar| MONTH_03 | 31 }}
{{#setvar| MONTH_04 | 30 }}
{{#setvar| MONTH_05 | 31 }}
{{#setvar| MONTH_06 | 30 }}
{{#setvar| MONTH_07 | 31 }}
{{#setvar| MONTH_08 | 31 }}
{{#setvar| MONTH_09 | 30 }}
{{#setvar| MONTH_10 | 31 }}
{{#setvar| MONTH_11 | 30 }}
{{#setvar| MONTH_12 | 31 }}
{{#setvar | days_in_month | {{#var|MONTH_{{CURRENTMONTH}} }} }}
{{#function | ShowDay || <span style="background-color:#cccccc;;padding:.25em;margin:.5em; margin-bottom:1.5em;margin-right:.5em; width:2em;">{{#1}}</span>
}}
{{#setvar| WeekStart | {{#op | 8 | - | {{#op | {{#op | {{CURRENTDAY}} | - | {{CURRENTDOW}} }} | mod | 7 }} }} }}
<div style="border:1px solid black;width:22em;text-align:center;padding-bottom:.5em"> 
<span style="background-color:#cccccc; padding:.25em; margin:.5em; margin-bottom:1.5em; margin-right:.5em; width:2em;">{{CURRENTMONTHNAME}} {{CURRENTYEAR}}</span>

{{#for | {{#setvar|i|0}} || {{#i| < |{{#WeekStart}} }} || {{#i|++}} 
|| {{#ShowDay| 00 }} 
}}{{#for | {{#setvar | day | 1}} ||  {{#day | <= | {{#days_in_month}} }} || {{#null}} 
||  {{#for | {{#setvar|i|{{#WeekStart}}}} || {{#i | < | 7}} || {{#i|++}} {{#day|++}}  
|| {{#ShowDay | {{#if|{{#day|<|10}}|0}}{{#if|{{#day | > | {{#days_in_month}}}}| 00 |{{#day}}}} }} }}
 <div style="clear:left"> </div>
{{#setvar|WeekStart|0}}}}
</div>

[edit] Explanation

The above code will produce a simple calendar for the current month. Lets take a look at each section of code to get a better idea of whats going on.

{{#nocache}}

Disables the cache so that the calendar is drawn each time. Otherwise the calendar page would only show the current month when it was cached.

{{#setvar| MONTH_1  | 31 }}
{{#setvar| MONTH_2  | 28 }}
{{#setvar| MONTH_3  | 31 }}
{{#setvar| MONTH_4  | 30 }}
{{#setvar| MONTH_5  | 31 }}
{{#setvar| MONTH_6  | 30 }}
{{#setvar| MONTH_7  | 31 }}
{{#setvar| MONTH_8  | 31 }}
{{#setvar| MONTH_9  | 30 }}
{{#setvar| MONTH_10 | 31 }}
{{#setvar| MONTH_11 | 30 }}
{{#setvar| MONTH_12 | 31 }}
{{#setvar | days_in_month | {{#var|MONTH_{{CURRENTMONTH}} }} }}

The above setvar commands demonstrate how to create rudimentary arrays. Wiki variables like CURRENTMONTH are replaced before Winter ever sees them, so MONTH_{{CURRENTMONTH}} appears as MONTH_11 to Winter.

{{#function | ShowDay || <span style="background-color:#cccccc;;padding:.25em;margin:.5em; margin-bottom:1.5em;margin-right:.5em; width:2em;">{{#1}}</span>
}}

Define a function to display the date box. this is to make the loop code easier to read

{{#setvar| WeekStart | {{#op | 8 | - | {{#op | {{#op | {{CURRENTDAY}} | - | {{CURRENTDOW}} }} | mod | 7 }} }} }}

Sets WeekStart to ( 8 - ((CURRENTDAY - CURRENTDOW) mod 7)) which will away give you the day of the week that the month started on in the form of 0 - 6 just like CURRENTDOW.

<div style="border:1px solid black;width:22em;text-align:center;padding-bottom:.5em"> 
<span style="background-color:#cccccc; padding:.25em; margin:.5em; margin-bottom:1.5em; margin-right:.5em; width:2em;">{{CURRENTMONTHNAME}} {{CURRENTYEAR}}</span>

Draw the calendar header in html

{{#for | {{#setvar|i|0}} || {{#i| < |{{#WeekStart}} }} || {{#i|++}} 
|| {{#ShowDay| 00 }} 

Adds the blank days before the start day (note: the closing }} is in the code below)

}}{{#for | {{#setvar | day | 1}} ||  {{#day | <= | {{#days_in_month}} }} || {{#null}} 
||  {{#for | {{#setvar|i|{{#WeekStart}}}} || {{#i | < | 7}} || {{#i|++}} {{#day|++}}  
|| {{#ShowDay | {{#if|{{#day|<|10}}|0}}{{#if|{{#day | > | {{#days_in_month}}}}| 00 |{{#day}}}} }} }}
 <div style="clear:left"> </div>
{{#setvar|WeekStart|0}}}}

This nested for loop draws out each box, first by day then by week. It is equivalent to the following PHP code:

for ($day = 1; $day <= $days_in_month;)
{  for ($i = $WeekStart; $i < 7; $i++, $day++)
   { ShowDay( (($day < 10) ? : "0" : "") . (($day > $days_in_month) : 00 : $day)
   }
   echo '<div "style=clear:left"></div>';
   $WeekStart = 0;
}

Pleawe note this code:

ShowDay( (($day < 10) ? : "0" : "") . (($day > $days_in_month) : 00 : $day)

displays a leading 0 if the date is less than 10, or 00 if the date is greater than the days in the month.

</div>

Closes box