property-grid

React property-grid

Install

$ npm install --save property-grid

Usage

Please make sure you have a global React variable pointing to the ReactJS library!

Basic usage:

/**
 * The onChange function can expect the following params:
 * @param  {Event} event The React event that triggered the change
 * @param  {Object} prop  The property on which the change was triggered (This is the corresponding object)
 * @param  {String} value The new value
 * @param  {Object[]} path Array with all the parents of the property, including the property itself
 */
function onChange(event, prop, value, path){
    path = path.map(function(prop){
        return prop.name
    })
    console.log(prop.name + ' has a new value: "' + value + '". Full path is ' + path.join('/'))
}

React.renderComponent(
    <PropertyGrid
        properties={properties}
        autoUpdate={true}
        onChange={onChange}
        value={value}
    >
    </PropertyGrid>,
    document.body
)

Complete example:

var React = require('react')
var PropertyGrid = require('property-grid')

//build your value object
var value = {
    name: 'Property grid',
    style: {
        border: '2px solid red',
        padding: {
            top: 10
        },
        position: {
            type: 'absolute'
        }
    }
}

//build the properties that should be displayed in the property grid
var properties = [
    {
        name: 'name'
    },
    {
        name: 'style',
        items: [
            {
                name: 'border'
            },
            {
                name: 'padding',
                items: [
                    {name: 'top'},
                    {name: 'bottom'}
                ]
            },
            {
                name: 'position',
                items: [
                    {
                        name  : 'type',
                        //you can specify a custom editor to be used
                        editor: function(props){
                            return React.DOM.select(props, [
                                React.DOM.option({key: 'abs', value: 'absolute'}, 'absolute'),
                                React.DOM.option({key: 'rel', value: 'relative'}, 'relative')
                            ])
                        }
                    },
                    {
                        name: 'top'
                    },
                    {
                        name: 'left'
                    }
                ]
            }
        ]
    }
]

React.renderComponent(
    <PropertyGrid
        properties={properties}
        autoUpdate={true}
        value={value}
    >
    </PropertyGrid>,
    document.body
)

Understanding value & valueProvider

You can either use the property grid with a value object, or with a valueProvider.

value

Usage with a value object means you want to exactly map the structure of your property grid to your object. Note that nesting properties should be the same:

Example:

var value = {
    name: '',
    text: 'my label',
    style: {
        top: '10',
        left: '10',
        position: 'relative'
    }
}

var properties = [
    {
        name: 'name'
    },
    {
        name: 'text',
        label: 'inner text'
    },
    {
        name: 'style',
        items: [
            {
                name: 'top'
            },
            {
                name: 'left'
            },
            {
                name: 'position'
            }
        ]
    }
]

Notice the structure of the properties exactly matches the structure of the value object. This is the simplest use-case for the property grid. In this case, you can even use autoUpdate={true} and your value object will be updated with the values from the property grid. In this case when your onChange function is called, the value object is already up-to-date, and you can use this function just to update other parts of your app.

valueProvider

In a more complex scenario, where your property grid structure does not exactly match your value object, you will need to use a valueProvider function together with the onChange function.

Here is an example:

var value = {
    name: 'my app',
    style: {
        top: 10,
        left: 20,
        position: 'relative',
        border: '10px solid red'
    }
}
var properties = [
    {
        name: 'name'
    },
    {
        name: 'style',
        items: [
            {
                name: 'position',
                items: [
                    { name: 'type' },
                    { name: 'top'  },
                    { name: 'left' }
                ]
            }
        ]
    }
]

//notice the structure in properties differs from the value object

//the path is an array of properties
//For example when style -> position -> top changes
//the valueProvider function is called with prop being { name: 'top' }
//and path being all parent nodes from root to the prop (including prop)
function valueProvider(prop, path){
    var name = prop.name
    path = path.map(function(p){ return p.name}).join('.')

    //for a quick demo, we just hardcode different property mappings,
    //but in a real example, you will want to optimize this
    if (path == 'style.position.top'){
        return value.style.top
    }
    if (path == 'style.position.left'){
        return value.style.left
    }
    if (path == 'style.position.type'){
        return value.style.position
    }
    if (path == 'style.border'){
        return value.style.border
    }
    return value[path]
}

//when a property changes, the onChange function will be called
//with event, prop, value, path args. prop and path are the same as given to the valueProvider
//while event being the event that triggered the change,
//and value being the new value that should be set for the prop property.
function onChange(event, prop, value, path){
    if (path == 'style.position.top'){
        value.style.top = value
    }
    if (path == 'style.position.left'){
        value.style.left = value
    }
    if (path == 'style.position.type'){
        value.style.position = value
    }
    if (path == 'style.border'){
        value.style.border = value
    }
    value[path] = value

    //you have to manually re-render the property grid
    //so that new values take effect
}

In the above scenario, don't forget to re-render the property grid, as it wont update itself with the new values.

CSS Styles

Please either manually include index.css in your page or require it in your webpack module. It includes normalize.css

Example with webpack

require('~property-grid/index.css')

//or, if you use stylus, include index.styl
require('~property-grid/index.styl')

var PropertyGrid = require('property-grid')

...

Or you can import the stylesheet directly in your css with webpack css loader

@import '~property-grid/index.css'

.your-app .property-grid {
    margin-top: 5px
}

If you already include normalize.css in your project, and don't want to have it included again, just use ~property-grid/index-no-normalize.css or ~property-grid/index-no-normalize.styl.

Changelog

2.0.0

• update params sent to the onChange listener. The params sent now are:

  • event
  • prop (Object)
  • value (String)
  • path (Object[])

  In order to obtain the full string path from an onChange call, just map path to prop.name:

  function onChange(event, prop, value, path){
      path = path.map(function(prop){ return prop.name })
  }

1.2.1