++ed by:
AZAWAWI KEEDI ZMUGHAL

3 PAUSE user(s)
5 non-PAUSE user(s).

Morgane Oger

NAME

SVG::Element - Generate the element bits for SVG.pm

VERSION

1.22

AUTHOR

Ronan Oger, ronan@roasp.com

SEE ALSO

perl(1),SVG,SVG::XML,SVG::Element,SVG::Parser, SVG::Manual

http://www.roasp.com/

http://www.perlsvg.com/

http://www.roitsystems.com/

http://www.w3c.org/Graphics/SVG/

tag (alias: element)

$tag = $SVG->tag($name, %attributes)

Generic element generator. Creates the element named $name with the attributes

specified in %attributes. This method is the basis of most of the explicit

element generators.

Example:

    my $tag = $SVG->tag('g', transform=>'rotate(-45)');

anchor

$tag = $SVG->anchor(%attributes)

Generate an anchor element. Anchors are put around objects to make them

'live' (i.e. clickable). It therefore requires a drawn object or group element

as a child.

Example:

    # generate an anchor    

    $tag = $SVG->anchor(

        -href=>'http://here.com/some/simpler/SVG.SVG'

    );

    # add a circle to the anchor. The circle can be clicked on.

    $tag->circle(cx=>10,cy=>10,r=>1);



    # more complex anchor with both URL and target

    $tag = $SVG->anchor(

          -href   => 'http://somewhere.org/some/other/page.html',

          -target => 'new_window'

    );

circle

$tag = $SVG->circle(%attributes)

Draw a circle at (cx,cy) with radius r.

Example:

    my $tag = $SVG->circlecx=>4, cy=>2, r=>1);

ellipse

$tag = $SVG->ellipse(%attributes)

Draw an ellipse at (cx,cy) with radii rx,ry.

Example:

    my $tag = $SVG->ellipse(

        cx=>10, cy=>10,

        rx=>5, ry=>7,

        id=>'ellipse',

        style=>{

            'stroke'=>'red',

            'fill'=>'green',

            'stroke-width'=>'4',

            'stroke-opacity'=>'0.5',

            'fill-opacity'=>'0.2'

        }

    );

rectangle (alias: rect)

$tag = $SVG->rectangle(%attributes)

Draw a rectangle at (x,y) with width 'width' and height 'height' and side radii

'rx' and 'ry'.

Example:

    $tag = $SVG->rectangle(

        x=>10, y=>20,

        width=>4, height=>5,

        rx=>5.2, ry=>2.4,

        id=>'rect_1'

    );

image

 $tag = $SVG->image(%attributes)

Draw an image at (x,y) with width 'width' and height 'height' linked to image

resource '-href'. See also "use".

Example:

    $tag = $SVG->image(

        x=>100, y=>100,

        width=>300, height=>200,

        '-href'=>"image.png", #may also embed SVG, e.g. "image.SVG"

        id=>'image_1'

    );

Output:

    <image xlink:href="image.png" x="100" y="100" width="300" height="200"/>

use

$tag = $SVG->use(%attributes)

Retrieve the content from an entity within an SVG document and apply it at

(x,y) with width 'width' and height 'height' linked to image resource '-href'.

Example:

    $tag = $SVG->use(

        x=>100, y=>100,

        width=>300, height=>200,

        '-href'=>"pic.SVG#image_1",

        id=>'image_1'

    );

Output:

    <use xlink:href="pic.SVG#image_1" x="100" y="100" width="300" height="200"/>

According to the SVG specification, the 'use' element in SVG can point to a

single element within an external SVG file.

polygon

$tag = $SVG->polygon(%attributes)

Draw an n-sided polygon with vertices at points defined by a string of the form

'x1,y1,x2,y2,x3,y3,... xy,yn'. The "get_path" method is provided as a

convenience to generate a suitable string from coordinate data.

Example:

    # a five-sided polygon

    my $xv = [0,2,4,5,1];

    my $yv = [0,0,2,7,5];



    $points = $a->get_path(

        x=>$xv, y=>$yv,

        -type=>'polygon'

    );



    $c = $a->polygon(

        %$points,

        id=>'pgon1',

        style=>\%polygon_style

    );

SEE ALSO:

"polyline", "path", "get_path".

polyline

$tag = $SVG->polyline(%attributes)

Draw an n-point polyline with points defined by a string of the form

'x1,y1,x2,y2,x3,y3,... xy,yn'. The "get_path" method is provided as a

convenience to generate a suitable string from coordinate data.

Example:

    # a 10-pointsaw-tooth pattern

    my $xv = [0,1,2,3,4,5,6,7,8,9];

    my $yv = [0,1,0,1,0,1,0,1,0,1];



    $points = $a->get_path(

        x=>$xv, y=>$yv,

        -type=>'polyline',

        -closed=>'true' #specify that the polyline is closed.

    );



    my $tag = $a->polyline (

        %$points,

        id=>'pline_1',

        style=>{

            'fill-opacity'=>0,

            'stroke-color'=>'rgb(250,123,23)'

        }

    );

line

$tag = $SVG->line(%attributes)

Draw a straight line between two points (x1,y1) and (x2,y2).

Example:

    my $tag = $SVG->line(

        id=>'l1',

        x1=>0, y1=>10,

        x2=>10, y2=>0

    );

To draw multiple connected lines, use "polyline".

text

$text = $SVG->text(%attributes)->cdata();

$text_path = $SVG->text(-type=>'path');

$text_span = $text_path->text(-type=>'span')->cdata('A');

$text_span = $text_path->text(-type=>'span')->cdata('B');

$text_span = $text_path->text(-type=>'span')->cdata('C');

define the container for a text string to be drawn in the image.

Input:

    -type     = path type (path | polyline | polygon)

    -type     = text element type  (path | span | normal [default])

Example:

    my $text1 = $SVG->text(

        id=>'l1', x=>10, y=>10

    )->cdata('hello, world');



    my $text2 = $SVG->text(

        id=>'l1', x=>10, y=>10, -cdata=>'hello, world');



    my $text = $SVG->text(

        id=>'tp', x=>10, y=>10 -type=>path)

        ->text(id=>'ts' -type=>'span')

        ->cdata('hello, world');

SEE ALSO:

    L<"desc">, L<"cdata">.

title

$tag = $SVG->title(%attributes)

Generate the title of the image.

Example:

    my $tag = $SVG->title(id=>'document-title')->cdata('This is the title');

desc

$tag = $SVG->desc(%attributes)

Generate the description of the image.

Example:

    my $tag = $SVG->desc(id=>'document-desc')->cdata('This is a description');

comment

$tag = $SVG->comment(@comments)

Generate the description of the image.

Example:

    my $tag = $SVG->comment('comment 1','comment 2','comment 3');

$tag = $SVG->pi(@pi)

Generate a set of processing instructions

Example:

    my $tag = $SVG->pi('instruction one','instruction two','instruction three');



    returns: 

      <lt>?instruction one?<gt>

      <lt>?instruction two?<gt>

      <lt>?instruction three?<gt>

script

$tag = $SVG->script(%attributes)

Generate a script container for dynamic (client-side) scripting using

ECMAscript, Javascript or other compatible scripting language.

Example:

    my $tag = $SVG->script(-type=>"text/ecmascript");



    # populate the script tag with cdata

    # be careful to manage the javascript line ends.

    # qq|text| or qq§text§ where text is the script 

    # works well for this.



    $tag->cdata(qq|function d(){

        //simple display function

        for(cnt = 0; cnt < d.length; cnt++)

            document.write(d[cnt]);//end for loop

        document.write("<BR>");//write a line break

      }|

    );

path

$tag = $SVG->path(%attributes)

Draw a path element. The path vertices may be imputed as a parameter or

calculated usingthe "get_path" method.

Example:

    # a 10-pointsaw-tooth pattern drawn with a path definition

    my $xv = [0,1,2,3,4,5,6,7,8,9];

    my $yv = [0,1,0,1,0,1,0,1,0,1];



    $points = $a->get_path(

        x => $xv,

        y => $yv,

        -type   => 'path',

        -closed => 'true'  #specify that the polyline is closed

    );



    $tag = $SVG->path(

        %$points,

        id    => 'pline_1',

        style => {

            'fill-opacity' => 0,

            'fill-color'   => 'green',

            'stroke-color' => 'rgb(250,123,23)'

        }

    );

SEE ALSO:

"get_path".

get_path

$path = $SVG->get_path(%attributes)

Returns the text string of points correctly formatted to be incorporated into

the multi-point SVG drawing object definitions (path, polyline, polygon)

Input: attributes including:

    -type     = path type (path | polyline | polygon)

    x         = reference to array of x coordinates

    y         = reference to array of y coordinates

Output: a hash reference consisting of the following key-value pair:

    points    = the appropriate points-definition string

    -type     = path|polygon|polyline

    -relative = 1 (define relative position rather than absolute position)

    -closed   = 1 (close the curve - path and polygon only)

Example:

    #generate an open path definition for a path.

    my ($points,$p);

    $points = $SVG->get_path(x=&gt\@x,y=&gt\@y,-relative=&gt1,-type=&gt'path');

 

    #add the path to the SVG document

    my $p = $SVG->path(%$path, style=>\%style_definition);



    #generate an closed path definition for a a polyline.

    $points = $SVG->get_path(

        x=>\@x,

        y=>\@y,

        -relative=>1,

        -type=>'polyline',

        -closed=>1

    ); # generate a closed path definition for a polyline



    # add the polyline to the SVG document

    $p = $SVG->polyline(%$points, id=>'pline1');

Aliases: get_path set_path

animate

$tag = $SVG->animate(%attributes)

Generate an SMIL animation tag. This is allowed within any nonempty tag. Refer\

to the W3C for detailed information on the subtleties of the animate SMIL

commands.

Inputs: -method = Transform | Motion | Color

  my $an_ellipse = $SVG->ellipse(

      cx=>30,cy=>150,rx=>10,ry=>10,id=>'an_ellipse',

      stroke=>'rgb(130,220,70)',fill=>'rgb(30,20,50)'); 



  $an_ellipse-> animate(

      attributeName=>"cx",values=>"20; 200; 20",dur=>"10s", repeatDur=>'indefinite');



  $an_ellipse-> animate(

      attributeName=>"rx",values=>"10;30;20;100;50",

      dur=>"10s", repeatDur=>'indefinite');



  $an_ellipse-> animate(

      attributeName=>"ry",values=>"30;50;10;20;70;150",

      dur=>"15s", repeatDur=>'indefinite');



  $an_ellipse-> animate(

      attributeName=>"rx",values=>"30;75;10;100;20;20;150",

      dur=>"20s", repeatDur=>'indefinite');



  $an_ellipse-> animate(

      attributeName=>"fill",values=>"red;green;blue;cyan;yellow",

      dur=>"5s", repeatDur=>'indefinite');



  $an_ellipse-> animate(

      attributeName=>"fill-opacity",values=>"0;1;0.5;0.75;1",

      dur=>"20s",repeatDur=>'indefinite');



  $an_ellipse-> animate(

      attributeName=>"stroke-width",values=>"1;3;2;10;5",

      dur=>"20s",repeatDur=>'indefinite');

group

$tag = $SVG->group(%attributes)

Define a group of objects with common properties. groups can have style,

animation, filters, transformations, and mouse actions assigned to them.

Example:

    $tag = $SVG->group(

        id        => 'xvs000248',

        style     => {

            'font'      => [ qw( Arial Helvetica sans ) ],

            'font-size' => 10,

            'fill'      => 'red',

        },

        transform => 'rotate(-45)'

    );

defs

$tag = $SVG->defs(%attributes)

define a definition segment. A Defs requires children when defined using SVG.pm

Example:

    $tag = $SVG->defs(id  =>  'def_con_one',);

style

$SVG->style(%styledef)

Sets/Adds style-definition for the following objects being created.

Style definitions apply to an object and all its children for all properties for

which the value of the property is not redefined by the child.

mouseaction

$SVG->mouseaction(%attributes)

Sets/Adds mouse action definitions for tag

$SVG->attrib($name, $value)

Sets/Adds attributes of an element.

Retrieve an attribute:

    $svg->attrib($name);

Set a scalar attribute:

    $SVG->attrib $name, $value

Set a list attribute:

    $SVG->attrib $name, \@value

Set a hash attribute (i.e. style definitions):

    $SVG->attrib $name, \%value

Remove an attribute:

    $svg->attrib($name,undef);

Aliases: attr attribute

cdata

$SVG->cdata($text)

Sets cdata to $text. SVG.pm allows you to set cdata for any tag. If the tag is

meant to be an empty tag, SVG.pm will not complain, but the rendering agent will

fail. In the SVG DTD, cdata is generally only meant for adding text or script

content.

Example:

    $SVG->text(

        style => {

            'font'      => 'Arial',

            'font-size' => 20

        })->cdata('SVG.pm is a perl module on CPAN!');



    my $text = $SVG->text(style=>{'font'=>'Arial','font-size'=>20});

    $text->cdata('SVG.pm is a perl module on CPAN!');

Result:

    E<lt>text style="font: Arial; font-size: 20" E<gt>SVG.pm is a perl module on CPAN!E<lt>/text E<gt>

SEE ALSO:

  L<"CDATA"> L<"desc">, L<"title">, L<"text">, L<"script">.

CDATA

 $script = $SVG->script();

 $script->CDATA($text);

Generates a <![CDATA[ ... ]]> tag with the contents of $text rendered exactly as supplied. SVG.pm allows you to set cdata for any tag. If the tag is

meant to be an empty tag, SVG.pm will not complain, but the rendering agent will

fail. In the SVG DTD, cdata is generally only meant for adding text or script

content.

Example:

      my $text = qq§

        var SVGDoc;

        var groups = new Array();

        var last_group;

        

        /*****

        *

        *   init

        *

        *   Find this SVG's document element

        *   Define members of each group by id

        *

        *****/

        function init(e) {

            SVGDoc = e.getTarget().getOwnerDocument();

            append_group(1, 4, 6); // group 0

            append_group(5, 4, 3); // group 1

            append_group(2, 3);    // group 2

        }§;

        $SVG->script()->CDATA($text);

Result:

    E<lt>script E<gt>

      <gt>![CDATA[

        var SVGDoc;

        var groups = new Array();

        var last_group;

        

        /*****

        *

        *   init

        *

        *   Find this SVG's document element

        *   Define members of each group by id

        *

        *****/

        function init(e) {

            SVGDoc = e.getTarget().getOwnerDocument();

            append_group(1, 4, 6); // group 0

            append_group(5, 4, 3); // group 1

            append_group(2, 3);    // group 2

        }

        ]]E<gt>

SEE ALSO:

  L<"cdata">, L<"script">.

filter

$tag = $SVG->filter(%attributes)

Generate a filter. Filter elements contain "fe" filter sub-elements.

Example:

    my $filter = $SVG->filter(

        filterUnits=>"objectBoundingBox",

        x=>"-10%",

        y=>"-10%",

        width=>"150%",

        height=>"150%",

        filterUnits=>'objectBoundingBox'

    );



    $filter->fe();

SEE ALSO:

"fe".

fe

$tag = $SVG->fe(-type=>'type', %attributes)

Generate a filter sub-element. Must be a child of a "filter" element.

Example:

    my $fe = $SVG->fe(

        -type     => 'DiffuseLighting'  # required - element name omiting 'fe'

        id        => 'filter_1',

        style     => {

            'font'      => [ qw(Arial Helvetica sans) ],

            'font-size' => 10,

            'fill'      => 'red',

        },

        transform => 'rotate(-45)'

    );

Note that the following filter elements are currently supported:

  • feBlend

  • feColorMatrix

  • feComponentTransfer

  • feComposite

  • feConvolveMatrix

  • feDiffuseLighting

  • feDisplacementMap

  • feDistantLight

  • feFlood

  • feFuncA

  • feFuncB

  • feFuncG

  • feFuncR

  • feGaussianBlur

  • feImage

  • feMerge

  • feMergeNode

  • feMorphology

  • feOffset

  • fePointLight

  • feSpecularLighting

  • feSpotLight

  • feTile

  • feTurbulence

SEE ALSO:

"filter".

pattern

$tag = $SVG->pattern(%attributes)

Define a pattern for later reference by url.

Example:

    my $pattern = $SVG->pattern(

        id     => "Argyle_1",

        width  => "50",

        height => "50",

        patternUnits        => "userSpaceOnUse",

        patternContentUnits => "userSpaceOnUse"

    );

set

$tag = $SVG->set(%attributes)

Set a definition for an SVG object in one section, to be referenced in other

sections as needed.

Example:

    my $set = $SVG->set(

        id     => "Argyle_1",

        width  => "50",

        height => "50",

        patternUnits        => "userSpaceOnUse",

        patternContentUnits => "userSpaceOnUse"

    );

stop

$tag = $SVG->stop(%attributes)

Define a stop boundary for "gradient"

Example:

   my $pattern = $SVG->stop(

       id     => "Argyle_1",

       width  => "50",

       height => "50",

       patternUnits        => "userSpaceOnUse",

       patternContentUnits => "userSpaceOnUse"

   );

$tag = $SVG->gradient(%attributes)

Define a color gradient. Can be of type linear or radial

Example:

    my $gradient = $SVG->gradient(

        -type => "linear",

        id    => "gradient_1"

    );

GENERIC ELEMENT METHODS

The following elements are generically supported by SVG:

  • altGlyph

  • altGlyphDef

  • altGlyphItem

  • clipPath

  • color-profile

  • cursor

  • definition-src

  • font-face-format

  • font-face-name

  • font-face-src

  • font-face-url

  • foreignObject

  • glyph

  • glyphRef

  • hkern

  • marker

  • mask

  • metadata

  • missing-glyph

  • mpath

  • switch

  • symbol

  • tref

  • view

  • vkern

See e.g. "pattern" for an example of the use of these methods.

1 POD Error

The following errors were encountered while parsing the POD:

Around line 1241:

Non-ASCII character seen before =encoding in 'qq§text§'. Assuming ISO8859-1