fglsvgcanvas: SVG drawing module

Table 1. fglsvgcanvas user defined types (fglsvgcanvas.4gl)
Type Description 
PUBLIC TYPE t_svg_rect RECORD
    x DECIMAL,
    y DECIMAL,
    width DECIMAL,
    height DECIMAL
  END RECORD
 The t_svg_rect type defines the position and dimensions of a rectangle.
Table 2. fglsvgcanvas constants (fglsvgcanvas.4gl)
Constant Description
SVGATT_* constants List of predefined SVG attributes.
Table 3. fglsvgcanvas utility functions (fglsvgcanvas.4gl)
Function Description 
animateTransform(
   attributeName STRING, attributeType STRING,
   type STRING, from STRING, to STRING,
   by STRING, begin STRING, dur STRING,
   repeatCount STRING )
  RETURNS om.DomNode
 Produces an SVG "animateTransform" element. 
circle(
   cx DECIMAL,
   cy DECIMAL,
   r DECIMAL )
  RETURNS om.DomNode
 Produces an SVG "circle" element. 
clean( cid SMALLINT )
 Deletes all SVG elements inside the SVG canvas. 
clipPath_rect(
   id STRING,
   x DECIMAL,
   y DECIMAL,
   width DECIMAL,
   height DECIMAL )
  RETURNS om.DomNode
 Produces an SVG "clipPath" element with a "rect" element. 
color_shade(
   source STRING,
   factor DECIMAL )
 RETURNS STRING
 Applies a shade factor to an RGB color. 
color_tint(
   source STRING,
   factor DECIMAL )
 RETURNS STRING
 Applies a tint factor to an RGB color. 
create( name STRING )
 RETURNS SMALLINT
 Creates a new SVG canvas handler. 
createChars( value STRING )
  RETURNS om.DomNode
 Produces a SVG DOM text node. 
createElement(
   tagName STRING,
   id STRING )
  RETURNS om.DomNode
 Produces a SVG DOM element with the tag name specified as parameter. 
defs(
   id STRING )
  RETURNS om.DomNode
 Produces a SVG "defs" element. 
destroy( cid SMALLINT )
 Releases resources allocated for the SVG canvas. 
display( cid SMALLINT )
 Displays the SVG canvas. 
ellipse(
   cx DECIMAL,
   cy DECIMAL,
   rx DECIMAL,
   ry DECIMAL )
  RETURNS om.DomNode
 Produces a SVG "ellipse" element. 
filter(
   id STRING,
   x STRING,
   y STRING,
   width STRING,
   height STRING )
  RETURNS om.DomNode
 Produces the SVG "filter" element. 
finalize( )
 Releases the fglsvgcanvas library. 
g(
   id STRING )
  RETURNS om.DomNode
 Produces a SVG "g" element. 
getBBox( cid SMALLINT, id STRING )
     RETURNS t_svg_rect
 Returns the bounding box of an SVG element. 
getItemId( cid SMALLINT )
     RETURNS STRING
 Returns SVG element id after a user action. 
image(
   href STRING,
   x DECIMAL,
   y DECIMAL,
   width DECIMAL,
   height DECIMAL,
   preserveAspectRatio STRING )
  RETURNS om.DomNode
 Produces a SVG "image" element. 
initialize( )
 Prepares the fglsvgcanvas library for use. 
line(
   x1 DECIMAL,
   y1 DECIMAL,
   x2 DECIMAL,
   y2 DECIMAL )
  RETURNS om.DomNode
 Produces a SVG "line" element. 
linearGradient(
   id STRING,
   x1 STRING,
   y1 STRING,
   x2 STRING,
   y2 STRING,
   spreadMethod STRING,
   gradientTransform STRING,
   gradientUnits STRING )
  RETURNS om.DomNode
 Produces a SVG "linearGradient" element. 
marker(
   id STRING,
   markerUnits STRING,
   refX DECIMAL,
   refY DECIMAL,
   markerWidth DECIMAL,
   markerHeight DECIMAL,
   orient STRING )
  RETURNS om.DomNode
 Produces a SVG "marker" element. 
mask(
   id STRING,
   x STRING,
   y STRING,
   width STRING,
   height STRING,
    node om.DomNode,
    name STRING )
 Produces a SVG "mask" element. 
nl_to_tspan(
   text om.DomNode,
   x STRING,
   y STRING,
   dx STRING,
   dy STRING,
   content STRING )
 Converts a string to a SVG "text" element with "tspan" sub-elements. 
path(
   d STRING )
  RETURNS om.DomNode
 Produces a SVG "path" element. 
pattern(
   id STRING,
   x DECIMAL,
   y DECIMAL,
   width DECIMAL,
   height DECIMAL,
   patternUnits STRING,
   patternContentUnits STRING,
   patternTransform STRING,
   preserveAspectRatio STRING )
  RETURNS om.DomNode
 Produces a SVG "pattern" element. 
polygon(
   points STRING )
  RETURNS om.DomNode
 Produces a SVG "polygon" element. 
polyline(
   points STRING )
  RETURNS om.DomNode
 Produces a SVG "polyline" element. 
radialgradient(
   id STRING,
   cx STRING,
   cy STRING,
   fx STRING,
   fy STRING,
   r STRING,
   spreadMethod STRING,
   gradientTransform STRING,
   gradientUnits STRING )
  RETURNS om.DomNode
 Produces a SVG "radialGradient" element. 
rect(
   x DECIMAL,
   y DECIMAL,
   width DECIMAL,
   height DECIMAL,
   rx DECIMAL,
   ry DECIMAL )
  RETURNS om.DomNode
 Produces a SVG "rect" element. 
removeElement(
    node om.DomNode )
 Deletes a SVG element from the SVG canvas. 
setAttributes(
    node om.DomNode,
    attrs om.SaxAttributes )
 Sets the SVG attributes from an attribute set. 
setCurrent(
   cid SMALLINT )
 Selects the SVG canvas handler for subsequent SVG canvas API calls. 
setRootSVGAttributes(
   id STRING,
   width STRING,
   height STRING,
   viewBox STRING,
   preserveAspectRatio STRING )
  RETURNS om.DomNode
 Produces the root SVG element. 
stop(
   offset STRING,
   color STRING,
   opacity STRING )
  RETURNS om.DomNode
 Produces a SVG "stop" element for gradients. 
styleAttributeList(
   attrs om.SaxAttributes )
 RETURNS STRING
 Builds a string with a list of attributes to be used in a style attribute. 
styleDefinition(
   selector STRING,
   attrs om.SaxAttributes )
 RETURNS STRING
 Produces a CSS style definition with a selection and list of attributes. 
styleList(
    content STRING )
  RETURNS om.DomNode
 Produces a CSS style list. 
svg(
   id STRING,
   x STRING,
   y STRING,
   width STRING,
   height STRING,
   viewBox STRING,
   preserveAspectRatio STRING
  RETURNS om.DomNode
 Produces a SVG "svg" element. 
text(
   x DECIMAL,
   y DECIMAL,
   content STRING,
   class STRING )
  RETURNS om.DomNode
 Produces a SVG "text" element. 
text_path(
   x DECIMAL,
   y DECIMAL,
   content STRING,
   path STRING
   class STRING )
  RETURNS om.DomNode
 Produces the SVG "text" element with a "textPath" sub-element. 
text_tref(
   x DECIMAL,
   y DECIMAL,
   tref STRING,
   class STRING )
  RETURNS om.DomNode
 Produces the SVG "text" element with a "tref" sub-element. 
title( text STRING )
  RETURNS om.DomNode
 Produces a SVG "title" element. 
tspan(
   x DECIMAL,
   y DECIMAL,
   dx STRING,
   dy STRING,
   style STRING,
   content STRING )
  RETURNS om.DomNode
 Produces a SVG "tspan" element. 
url( name STRING )
 RETURNS STRING
 Produces a "url(#name)" reference for SVG elements. 
use(
   name STRING,
   x DECIMAL,
   y DECIMAL )
  RETURNS om.DomNode
 Produces a SVG "use" element.