document tabbing support by adding in the textformatting notes

document --tabwidth argument
document AXIS color

git-svn-id: svn://svn.oetiker.ch/rrdtool/trunk/program@325 a5681a0c-68f1-0310-ab6d-d61299d08faa

diff --git a/doc/rrdgraph.src b/doc/rrdgraph.src
index df7a836..b829a7b 100644 (file)
--- a/doc/rrdgraph.src
+++ b/doc/rrdgraph.src
@@ -291,15 +291,16 @@ would look like this:
 
 B<[-c|--color I<COLORTAG>#I<rrggbb>[I<aa>]]>
 
-Override the default colors for the standard elements of the graph.
-The I<COLORTAG> is one of C<BACK> ground, C<CANVAS>, C<SHADEA> for the
-left and top border, C<SHADEB> for the right and bottom border, C<GRID>,
-C<MGRID> for the major grid, C<FONT>, C<FRAME> and axis, C<ARROW>.
-Each color is composed out of three hexadecimal numbers specifying
-its color component (00 is off, FF is maximum) of red, green and blue.
-Optionally you may add another hexadecimal number specifying the
-transparency (FF is solid).
-You may set this option several times to alter multiple defaults.
+Override the default colors for the standard elements of the graph. The
+I<COLORTAG> is one of C<BACK> background, C<CANVAS> for the background of
+the actual graph, C<SHADEA> for the left and top border, C<SHADEB> for the
+right and bottom border, C<GRID>, C<MGRID> for the major grid, C<FONT> for
+the color of the font, C<AXIS> for the axis of the graph and finaly C<ARROW>
+for the arrow head pointing to the future. Each color is composed out of
+three hexadecimal numbers specifying its color component (00 is off, FF is
+maximum) of red, green and blue. Optionally you may add another hexadecimal
+number specifying the transparency (FF is solid). You may set this option
+several times to alter multiple defaults.
 
 A green arrow is made by: C<--color ARROW:00FF00>
 
@@ -332,6 +333,10 @@ B<[-F|--force-rules-legend]>
 
 Force the generation of HRULE and VRULE legend even if those HRULE or VRULE will not be drawn because out of graph boundaries (mimics behaviour of pre 1.0.42 versions).
 
+B<[-T|--tabwidth E<lt>valueE<gt>]>
+
+By default the tab-width is 40 pixels, use this option to change it.
+
 B<[-b|--base E<lt>valueE<gt>]>
 
 If you are graphing memory (and NOT network traffic) this switch

diff --git a/doc/rrdgraph_graph.src b/doc/rrdgraph_graph.src
index d9b2d9c..907ff18 100644 (file)
--- a/doc/rrdgraph_graph.src
+++ b/doc/rrdgraph_graph.src
@@ -262,4 +262,39 @@ a variable here.
 
 =back
 
+=head1 NOTES on legend arguments
+
+=head2 Escaping the colon
+
+In a ':' in a I<legend> argument will mark the end of the legend. To
+enter a ':' into a legend, the colon must be escaped with a backslash '\:'.
+Beware, that many environments look for backslashes themselves, so it may
+be necessary to write two backslashes so that one is passed onto rrd_graph.
+
+=head2 String Formatting
+
+The text printed below the actual graph can be formated by appending special
+escaped characters at the end of a text. When ever such a character occurs,
+all pending text is pushed onto the graph according to the character
+specified.
+
+Valid markers are: B<\j> for justified, B<\l> for left aligned, B<\r> for
+right aligned and B<\c> for centered. In the next section there is an
+example showing how to use centered formating.
+
+Normally there are two space characters inserted between every two items
+printed into the graph. The space following a string can be suppressed by
+putting a B<\g> at the end of the string. The B<\g> also ignores any space
+inside the string if it is at the very end of the string. This can be used
+in connection with B<%s> to suppress empty unit strings.
+
+ GPRINT:a:MAX:%lf%s\g
+
+A special case is COMMENT:B<\s> this inserts some additional vertical space
+before placing the next row of legends.
+
+If you are using the proportional font in your graph, you can use tab characters
+or the sequence B<\t> to lin-up legend elements. Note that the tabs inserted are
+relative to the start of the current legend element!
+
 =include see_also