NAME

Tk::Tree::JSON - JSON tree widget

SYNOPSIS

 use Tk::Tree::JSON;

 $top = MainWindow->new;

 $json_tree = $top->JSON(?options?);
 $json_tree = $top->ScrolledJSON(?options?);

 $json_tree->load_json_file("file.json");
 $json_tree->load_json_string(
        '[2008, "Tk::Tree::JSON", null, false, true, 30.12]');

DESCRIPTION

JSON graphically displays the tree of JSON structures loaded from either a JSON file or a JSON string.

JSON enables Perl/Tk applications with a widget that allows visual representation and interaction with JSON structure trees.

Target applications may include JSON viewers, editors and the like.

STANDARD OPTIONS

JSON is a subclass of Tk::Tree and therefore inherits all of its standard options.

Details on standard widget options can be found at Tk::options.

WIDGET-SPECIFIC OPTIONS

Name: arraySymbol

Class: ArraySymbol

Switch: -arraysymbol

Set the symbol representing JSON arrays.

Default value: [].

Name: objectSymbol

Class: ObjectSymbol

Switch: -objectsymbol

Set the symbol representing JSON objects.

Default value: {}.

Name: nameValueSep

Class: NameValueSep

Switch: -namevaluesep

Set the separator to add between names and values of JSON objects.

Default value: : .

Name: valueMaxLength

Class: VALUEMaxLength

Switch: -valuemaxlength

Set the maximum number of characters to be displayed for JSON text values. Content of such values is trimmed to a length of valueMaxLength characters.

Default value: 80.

Name: valueLongSymbol

Class: VALUELongSymbol

Switch: -valuelongsymbol

Set the symbol to append to JSON text values with length greater than valueMaxLength characters.

Default value: ....

WIDGET METHODS

The JSON method creates a widget object. This object supports the configure and cget methods described in Tk::options which can be used to enquire and modify the options described above. The widget also inherits all the methods provided by the generic Tk::Widget class.

An JSON is not scrolled by default. The ScrolledJSON method creates a scrolled JSON.

The following additional methods are available for JSON widgets:

$json_tree->load_json_file($json_filename)

Load a JSON structure from a file into the tree. If the tree is already loaded with a JSON structure, no reloading occurs and a warning message is issued.

Return value: none.

Example(s):

 # load JSON structure from file document.json into the tree
 $json_tree->load_json_file('document.json');

$json_tree->load_json_string($json_string)

Load a JSON structure represented by a string into the tree. If the tree is already loaded with a JSON structure, no reloading occurs and a warning message is issued.

Return value: none.

Example(s):

 # load JSON structure from json string into the tree
 $json_tree->load_json_string('{"name1": "text1", "name2": "text2"}');

$json_tree->get_value()

For the currently selected element, retrieve the value of the underlying JSON structure according to the following logic:

• JSON structure is either a string, number, true, false or null: full text content of JSON structure is retrieved

• JSON structure is a name/value pair where value is neither a JSON array nor a JSON object: full text content of value is retrieved

• JSON structure is none of the above: undef is retrieved

Return value: Full text content of JSON structure represented by selected element if it is either a string, number, true, false, null or a non-array non-object value of a name/value pair, or undef if it is either an array or object.

Example(s):

 # retrieve value of currently selected element
 $value = $json_tree->get_value();

EXAMPLES

A JSON viewer using Tk::Tree::JSON can be found in the examples directory included with this module.

VERSION

Tk::Tree::JSON version 0.01.

AUTHOR

Santos, José.

BUGS

Please report any bugs or feature requests to bug-tk-tree-json at rt.cpan.org or through the web interface at http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Tk-Tree-JSON. The author will be notified and there will be automatic notification about progress on bugs as changes are made.

SUPPORT

Documentation for this module can be found with the following perldoc command:

    perldoc Tk::Tree::JSON

Additional information at:

• RT: CPAN's request tracker

  http://rt.cpan.org/NoAuth/Bugs.html?Dist=Tk-Tree-JSON

• AnnoCPAN: Annotated CPAN documentation

  http://annocpan.org/dist/Tk-Tree-JSON

• CPAN Ratings

  http://cpanratings.perl.org/d/Tk-Tree-JSON

• Search CPAN

  http://search.cpan.org/dist/Tk-Tree-JSON

COPYRIGHT AND LICENSE

Copyright (c) 2008 José Santos. All rights reserved.

This program is free software. It can redistributed and/or modified under the same terms as Perl itself.

ACKNOWLEDGEMENTS

Thanks to my family.

DEDICATION

I dedicate Tk::Tree::JSON to Dr. Gabriel.

cpanm Tk::Tree::JSON

perl -MCPAN -e shell
install Tk::Tree::JSON