jonnyfolk has asked for the wisdom of the Perl Monks concerning the following question:

From an array @dates and using Date::Calc we can create a series of required calendar months: 
while ( defined $dates[0] ) {
    my $days = $dates[0];
    my ( $year, $month, $day ) = Add_Delta_Days( 1, 1, 1, $days - 1 );
    my $new_c = new HTML::CalendarMonth ( year => $year, month => $mon
+th ); 
}

[download]
How might I create the empty calendars of , say, June and July if the first date in @days creates a date in May, and the second a date in August?

Replies are listed 'Best First'.
Re: printing calendars using HTML::CalendarMonth
by borisz (Canon) on Feb 08, 2004 at 22:22 UTC
    Find the first date and the last. Then generate a cal for every month in between.
    Boris
[reply]
      The lines I am currently thinking along is to analyse the difference between dates[0] and dates[1]. If the difference is 2 or more to insert calendars according to the difference. However I am still tripping up somewhere and I believe that it is the test on populating the calendar with days.

      Perhaps a kindly monk would show me the error of my ways...

      while ( defined $dates[0] ) {
    my $new_c;
    
    my $days = $dates[0];
    my $days1 = $dates[1];
    my ( $year, $month, $day ) = Add_Delta_Days( 1, 1, 1, $days - 1 );
    my ( $year1, $month1, $day1 );
    unless (! $days1) {
        ( $year1, $month1, $day1 ) = Add_Delta_Days( 1, 1, 1, $days1 -
+ 1 );
    }
    my $diffmonth = $month1 - $month;
    if ($diffmonth >= 2) {
    my $count = 0;
        while  ($count < $diffmonth) {
            $count += 1;
            $month++;
            $new_c = new HTML::CalendarMonth ( year => $year1, month =
+> $month ); 
            push (@cals, $new_c);
        }
    }    else {
        $new_c = new HTML::CalendarMonth ( year => $year, month => $mo
+nth ); 
        push (@cals, $new_c);        
        @dates = CreateCal( $year, $month, @dates );
        push( @cals, $new_c );
    }
}

# Embolden headers
foreach my $calnum ( 0 .. $#cals ) {
   my $cal = $cals[$calnum];
   if (@{ $days[$calnum] }) {
       my @color = @{ $days[$calnum] }; # the days to be colored
   }
   $cal->item( $cal->month, $cal->year )->wrap_content( font({ size =>
+ '2' }) );
   $cal->item( $cal->dayheaders )->wrap_content( font({ size => '2' })
+ ); 
   $cal->item( @color )->wrap_content( font({ size => 3, color => 'red
+' }) );
}

# Generate container table
my $t = new HTML::ElementTable ( maxrow => 36, maxcol => 4 );

my $row = 0;
# Populate container table
for my $calnum ( 0 .. $#cals ) {
  my $col = $calnum % 4;
  my $row = int( $calnum / 4 );
  $t->cell( $row, $col )->push_content( $cals[$calnum] );
}


print $t->as_HTML;

print end_html();

exit(0);

sub CreateCal {
  my ( $cyear, $cmonth, @dates ) = @_;
  my ( @day, @temp );
  foreach my $days ( @dates ) {
    my ( $year, $month, $day ) = Add_Delta_Days( 1, 1, 1, $days - 1 );
    if ( $year == $cyear && $month == $cmonth ) {
      push ( @day, $day );
    } else {
      push ( @temp, $days );
    }
  }
  push ( @days, [ @day ] ); # store the days of each calendar
  return @temp;
}

      [download]
      Thanks due as always to Mr. Muskrat and mojotoad for their help with this code (the mistakes are my own :) )
[reply]
[d/l]
[select]
        Im not sure if this is what you asked for. But maybe you can improve it. 
        
# creates a array of HTML::CalendarMonth from two dates
# with every month inbetween. Dates are in days since 1.1.1
#
# return arrayref of HTML::CalendarMonth objects.
#
sub create_cal {
  my ( $d, $d2 ) = sort @_;
  my @cal;
  my @d  = Add_Delta_Days( 1, 1, 1, $d - 1 );
  my @d2 = Add_Delta_Days( 1, 1, 1, $d2 - 1 );
  while (1) {
    push @cal, HTML::CalendarMonth->new( year => $d[0], month => $d[1]
+ );
    last if ( $d[0] == $d2[0] && $d[1] == $d2[1] );
    if ( ++$d[1] > 12 ) {
      $d[0]++;
      $d[1] = 1;
    }
  }
  return \@cal;
}

        [download]
        Boris
[reply]
[d/l]

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