Inductiveload: New page: *Return to SpecCommandLineDrawing This module specifies the method for drawing an SVG object from parameters entered by the "command line". It contains: #A dictionary holding possible...

2009-01-21T01:45:13Z

New page: *Return to SpecCommandLineDrawing This module specifies the method for drawing an SVG object from parameters entered by the "command line". It contains: #A dictionary holding possible...

New page

*Return to [[SpecCommandLineDrawing]]

This module specifies the method for drawing an SVG object from parameters entered by the "command line". It contains:
#A dictionary holding possible parameters (except general style paramters - these are found in the [[SpecCommandLineDrawing/DraftAssDir|global association module]]), along with the type of the parameter and the default value, which will be used if the user doesn't specify. For example, if the user enters <tt>circle r:50</tt>, the circle will be centred at <tt>(0,0)</tt>.
#A function called <tt>draw_SVG()</tt>, which puts the parameters into the correct position in the SVG, and draws it using, in this case, the inkex helper module.
#A function used to perform overrides for redundant parameters. For example, in the circle case, the radius only is used in drawing the circle. However, if the user enters a diameter and not radius, the default radius (100) would be used unless this function sets the radius to the diameter/2.

==Draft Code==
<pre>
#!/usr/bin/env python
'''

######DESCRIPTION######

This script contains routines for drawing circles using command line parameters
formatted by command_line.py

import inkex, simplestyle
import command_line

command_dictionary = { 'circle':{
'r':{'t':'scalar', 'd':100}, #radius if r given, overrides diameter
'd':{'t':'scalar'}, #diameter
'c':{'t':'point' , 'd':(0,0)} #centre uses the inkscape position, if given
}}

def draw_SVG(params, parent):
style = command_line.create_SVG_style_dict(params)

attribs = {'style':simplestyle.formatStyle(style),
'cx': str(params['c'][0]),
'cy': str(params['c'][1]),
'r': str(params['r'])
}
inkex.etree.SubElement(parent, inkex.addNS('circle','svg'), attribs )

def set_defaults(params):

#r overrides d
if 'd' in params and 'r' not in params:
params['r'] = params['d']/2.0

return
</pre>

SpecCommandLineDrawing/DraftSubmodule - Revision history

Inductiveload: New page: *Return to SpecCommandLineDrawing This module specifies the method for drawing an SVG object from parameters entered by the "command line". It contains: #A dictionary holding possible...