Tk::XMLViewer - Tk widget to display XML


Tk::XMLViewer - Tk widget to display XML


  use Tk::XMLViewer;
  $xmlviewer = $top->XMLViewer->pack;
  $xmlviewer->insertXML(-file => "test.xml");
  $xmlviewer->insertXML(-text => '<?xml version="1.0" encoding="ISO-8859-1" ?><a><bla /><foo>bar</foo></a>');


Tk::XMLViewer is an widget inherited from Tk::Text which displays XML in a hierarchical tree. You can use the plus and minus buttons to hide/show parts of the tree.


Tk::XMLViewer supports all option of Tk::Text and additionally the following:

-tagcolor => $color
Foreground color of tags.

-attrkeycolor => $color
Foreground color of attribute keys.

-attrvalcolor => $color
Foreground color of attribute values.

-commentcolor => $color
Foreground color of comment sections.

The text tags xml_tag, xml_attrkey, xml_attrval, and xml_comment are defined for the corresponding XML elements. If you want to customize further you can configure the tags directly, for example:

    $xmlviewer->tagConfigure('xml_comment', -foreground => "white",
                             -background => "red", -font => "Helvetica 6");


Insert XML into the XMLViewer widget. Use the -file argument to insert a file and -text to insert an XML string.

Dump the contents of an Tk::Text widget into an XML string. This is meant as a alternative to the Tk::Text::dump method (in fact, DumpXML is implemented with the help of dump).

The output of DumpXML can be used as input for the XMLViewer widget, which is useful in debugging Tk::Text tags.

Use the static variant of DumpXML for Tk::Text widgets and the method variant for XMLViewer widgets.

    $xml_string1 = Tk::XMLViewer::DumpXML($text_widget);
    $xml_string2 = $xmlviewer->DumpXML;

Set indent with for XML tags

Insert XML Menu into Text widget menu.

Returns type of source used for last insertXML (-file or -text)

Returns filename (source type -file) or XML text (source type -text) used for last insertXML.

Returns hash of standard XML decl and DOCTYPE elements:
    my %xmlheader = $xmlviewer->GetInfo;

Elements for XMLdecl: Version Encoding Standalone Elements for DOCTYPE: Name Sysid Pubid Internal


Perl/Tk does not support Unicode, yet. For perl 5.6.0 and newer, unicode characters are translated to ISO-8859-1 chars, if possible. For older perls, there is no conversion (unless Unicode::String is installed), so unicode characters will show as binary values.

DumpXML will not work with nested text tags.

There should be only one insertXML operation at one time (these is probably only an issue with threaded operations, which do not work in Perl/Tk anyway).

Viewing of large XML files is slow.

head1 TODO

 - show to depth n: close everything from depth n+1
 - create menu item "close selected region"
 - DTD validation (is this possible with XML::Parser?)


Slaven Rezic, <>

Some additions by Jerry Geiger <>.


the XML::Parser manpage(3), the Tk::Text manpage(3).

 Tk::XMLViewer - Tk widget to display XML