cr_json_widget

This widget visualises a tree structure, where a node can be any widget.

Examples

Getting Started

  1. Add plugin to your project:
     dependencies:
         cr_json_widget: ^1.0.0
    

Usage

CrJsonWidget

This widget display all children as simple ListView and that it does not have good performance with huge jsons.

  1. Create JsonController:

     final _jsonController = JsonController(
         allNodesExpanded: false,
         uncovered: 3,
     );
    

    allNodesExpanded - Sets whether the json tree is expanded by default

    uncovered - Sets the value to what nesting by default the json tree will be expanded

  2. Add widget: 2.1 Accepts json as Map <String, Any> and builds the tree automatically:

         ...
         final data = <String, dynamic>{
             'integer': 1, 
             'string': 'test', 
         }
         ...
         CrJsonWidget(
             ..
             json: data
         )
         ...
    

    2.2 Accepts your custom List

         CrJsonWidget(
             ..
         jsonNodes: [
             JsonNode(
                 content: const Text(
                     'root1',
                     style: TextStyle(
                         fontWeight: FontWeight.bold,
                         color: Colors.red,
                     ),
                 ),
             ),
             JsonNode(
                 content: const Text(
                     'root2',
                     style: TextStyle(
                         fontWeight: FontWeight.bold,
                         color: Colors.deepPurpleAccent,
                     ),
                 ),
                 children: [
                     JsonNode(
                         content: const Text('child21'),
                     ),
                     JsonNode(
                         content: const Text('child22'),
                     ),
                     JsonNode(
                         content: const Text('root23'),
                         children: [
                             JsonNode(
                                 content: const Text('child231'),
                             ),
                         ],
                         ),
                     ],
                 ),
             ],
         ),
    

Full implementation example:

    ...
    CrJsonWidget(
        iconOpened: Icon(
            Icons.arrow_drop_down,
            size: _iconSize,
        ),
        iconClosed: Icon(
            Icons.arrow_right,
            size: _iconSize,
        ),
        indentHeight: 5,
        indentLeftEndJsonNode: _iconSize,
        jsonNodes: [
            JsonNode(
                content: const Text(
                    'root1',
                    style: TextStyle(
                        fontWeight: FontWeight.bold,
                        color: Colors.red,
                    ),
                ),
            ),
            JsonNode(
                content: const Text(
                    'root2',
                    style: TextStyle(
                        fontWeight: FontWeight.bold,
                        color: Colors.deepPurpleAccent,
                    ),
                ),
                children: [
                    JsonNode(
                        content: const Text('child21'),
                    ),
                    JsonNode(
                        content: const Text('child22'),
                    ),
                    JsonNode(
                        content: const Text('root23'),
                        children: [
                            JsonNode(
                                content: const Text('child231'),
                            ),
                        ],
                        ),
                    ],
                ),
            ],
        jsonController: _jsonController,
    ),

iconOpened - Custom icon for opening a node

iconClosed - Custom icon for closing a node

indentHeight - Vertical indent between levels

indentLeftEndJsonNode - The starting position of the ending node (Recommended size is the size of the icon)

json - Parsed json

jsonNodes - List of root level json nodes

jsonController - Json controller to manage the json state

Json Recycler Widgets

Use these widgets, if you have huge jsons. Since these widgets have builders, huge jsons don't affect its performance in any way.

  1. Create JsonRecyclerController:
      final _jsonController = JsonRecyclerController(
      saveClosedHistory: false,
      showStandardJson: false,
      isExpanded: true,
    );

isExpanded - Sets whether the json tree is expanded by default

saveClosedHistory - The parameter defines whether the previously opened child tabs should be saved or not

showStandardJson - Will show json with curly braces

jsonKeyColor - Json key color in the tree

intColor - Set color of int parameters in the tree of json

doubleColor - Set color of double parameters in the tree of json

stringColor- Set color of string parameters in the tree of json

nullColor- Set color of null parameters in the tree of json

boolColor - Set color of bool parameters in the tree of json

objectColor - Set color of object parameters in the tree of json

standardJsonBackgroundColor - Set background color of widget

iconOpened - Custom icon for opening a node

iconClosed - Custom icon for сlosing a node

fontWeight - Set font weignt of text. By default FontWeight.bold

horizontalSpaceMultiplier- The distance by which the left child element will be offset from the parent

verticalOffset - The space by which the child element will be offset from the parent

additionalIndentChildElements - Additional indentation for aligning child elements depending on the size of the parent icon

  1. Add widget:

❗ Since the CrJsonRecyclerWidget has a builder in it, you must set the height or you will get an error

2.1 CrJsonRecyclerWidget:

        ...
        final data = <String, dynamic>{
            'integer': 1, 
            'string': 'test', 
        }
        ...
       CrJsonRecyclerWidget(
             ..
              json: data,
            ),
        ...

json - Parsed json

jsonController - Json controller to manage the json state

Full implementation example:

      ...
      Expanded(
          child: CrJsonRecyclerWidget(
            json: json,
            jsonController: _jsonController,
          ),
        ),
      ...

2.2 CrJsonRecyclerSliver:

        ...
        final data = <String, dynamic>{
            'integer': 1, 
            'string': 'test', 
        }
        ...
              CrJsonRecyclerSliver(
                 ...
                  json: json,
              ),
       ...

json - Parsed json

jsonController - Json controller to manage the json state

Full implementation example:

        ...
        CustomScrollView(
              slivers: [
                    CrJsonRecyclerSliver(
                          jsonController: _jsonController,
                          json: json,
                    ),
              ],
          ),
        ...

Libraries

cr_json_color
cr_json_recycler
cr_json_widget