extjs-carto

Native components for ExtJS to interact with Carto map layers, data and visualizations.

CartoMap.js

Configs

Name	Type	Default	Description
cartoMap	L.map	L.map	The leaflet map for this component.
zoom	Number	4	A zoom value to initialize the cartoMap with.
scrollWheelZoom	Boolean	true	true to allow the map to be scrolled by the mouse wheel.
basemap	String Object L.tileLayer	'positronLite'	The basemap to be used for the cartoMap.
bounds	LatLngBounds	null	The bounds of the cartoMap.
minZoom	Number	3	The minimum possible zoom level of the cartoMap.
maxZoom	Number	18	The maximum possible zoom level of the cartoMap.
mapLock	Boolean	false	true for the map to update the filters in every store found in storesToLock when the cartoMap bounds change.
layers	Carto.util.LayerCollection	null	A collection of the layers of the cartoMap.
selection	Ext.data.Model	null	The selected record of the cartoMap.
selectedAction	String String[]	null	The actions to take when a record is selected.
stores	Ext.data.Store	null	The stores associated with each subLayer of the cartoMap.
storesToLock	String[]	null	An array of storeIds to be passed the cartoMap's bounds when mapLock is true.

Instance Properties

Name	Type	Default	Description
maskWhileLoading	Boolean	false	true to mask the map component while tiles are loading.
loadingMessage	String	'Loading Tiles...'	The message to display while the tiles are loading.

Binding

The map's selection is two-way bindable, similarly to other Extjs components. This means it plays well with things like grids.

Example

{
    xtype: 'grid',
    bind: {
        selection: '{selectedItem}',
        store: '{sampleStore}'
    }
}, {
    xtype: 'cartoMap',
    bind: {
        selection: '{selectedItem}'
    },
    basemap: 'darkMatterLite',
    layers: [{
        subLayers: [{
            bind: '{sampleStore}'
        }]
    }]
}

Available Basemaps

• positron
• positronLite
• positronLabelsBelow
• darkMatter
• darkMatterLite
• darkMatterLabelsBelow
• cartoWorldEco
• cartoWorldFlatBlue
• cartoWorldMidnightCommander
• cartoAntique
• toner
• tonerLite
• tonerLabelsBelow
• tonerBackground
• tonerLines
• tonerHybrid
• watercolor

Example Usage

{
    xtype: 'cartoMap',
    basemap: 'darkMatterLite'
}

Available Selected Actions

• placeMarker
• panTo

Example Usage

{
    xtype: 'cartoMap',
    selectedAction: 'panTo'
}

{
    xtype: 'cartoMap',
    selectedAction: ['panTo', 'placeMarker']
}

Layers

Layers are a combination of data (from SQL) and styling (from CartoCSS) that render the map. Carto has multiple different types of layers (see the demo for some examples), but there are some configs common to them all.

Configs

Name	Type	Default	Description
cartoLayer	Layer	null	The underlying Layer object.
layerId	String	Auto-generated id	The key by which this layer can be retrieved, removed, etc.
username	String	''	The username for the associated carto account.
table	String	''	The table that this layer draws from.
hidden	Boolean	false	Set to true to hide this layer.
mapZIndex	Number	null	Defines the order that the layers are rendered on the map.

Layer Groups

Carto can combine multiple layers into one layer group that is created and rendered as one layer, rather than multiple.

Configs

Name	Type	Default	Description
subLayers	Carto.util.SubLayerCollection	null	The collection of Carto.sublayer.SubLayerBase objects associated with this layer group.

SubLayers

Configs

Name	Type	Default	Description
layer	Carto.layer.LayerGroup	null	The Carto.layer.LayerGroup that owns this subLayer.

See also: Carto.mixin.DataContainingLayer

Torque Layers

Torque layers combine with Carto.css.Torque to create powerful layer objects that can accomplish much more than traditional map layers.

See also: Carto.mixin.DataContainingLayer

Example Usage

{
    xtype: 'cartoMap',
    layers: [{
        type: 'torque',
        css: {
            type: 'torque' // or heatmap, torquecat
        },
        ...
    }]
}

DataContainingLayer.js

Most layers (like [Carto.layer.Torque] and Carto.sublayer.SubLayerBase) contain data. This mixin defines the SQL, CartoCss, and store functionality for layers that render data.

Configs

Name	Type	Default	Description
store	Carto.CartoStore	null	A Carto.CartoStore associated with this layer. If defined, it will create the SQL for this layer.
sql	String	''	SQL for this layer to use when it is created.
css	Object String String[]	Carto.css.Point	The CartoCSS definition for this layer.
selection	Ext.data.Model	null	The layer's current selected record.
interactivity	Object	null	Use enable: true to enable interactity on this layer.

CartoCSS

CartoCSS defines how a layer is styled on the map. There are multiple types that are available to be used as-is or extended as appropriate.

Name	Type	Description
point	Carto.css.Point	A generic point-based style.
line	Carto.css.Line	A generic line-based style.
polygon	Carto.css.Polygon	A generic polygon-based style.
intensity	Carto.css.Intensity	Point style with multiplying effect.
heatmap	Carto.css.HeatMap	Torque style with multiplying effect.
torque	Carto.css.Torque	Torque style for showing time-based effects.
torquecat	Carto.css.TorqueCat	Torque style with added categorical grouping.

Example Usage

{
    css: {
        type: 'point',
        // the value config will extend, not overwrite
        value: {
            markerColor: 'blue'
        }
    }
}

CartoStore.js

Configs

Name	Type	Default	Description
groupBy	Carto.CartoGroupBy	null	A groupBy object defining the GROUP BY clause of the Carto.CartoProxy's SQL.

CartoProxy.js

Configs

Name	Type	Default	Description

CartoGroupBy.js

This is an SQL helper object for defining the GROUP BY clause in the SQL.

Configs

Name	Type	Default	Description
fields	Object[] String[]	null	An array of field configs, in the order they should be presented in the GROUP BY clause.
countName	String	'cnt'	The name of the field that should contain the counts of the different groups.

In addition, the Carto.CartoGroupBy object uses optional extra properties of the Ext.data.field.Field that are not native.

Name	Type	Default	Description
property	String	undefined	Specifies the name of the column for this field, if different from the name of the field.
sql	String	undefined	Use this to force the query to use this SQL for this field. Useful for more complicated queries.
aggregateType	String	undefined	An SQL function for aggregating on this field. If specified, this field will not be included in the GROUP BY clause.

Demos

Basic

• Visualization of a Map in Ext JS
• A Map centered on Japan
• A Map with a simple Carto layer
• A Map whose layers can be added and removed

Grid/Map

• Grid and Map bound to Carto Store
• Map with hidden layer and multiple selected actions
• Grid locked to Map bounds (with tooltip)
• Grid and Map with filter options
• Grid and Map with auto filter options
• Grid and Map with combo filter
• Grid and Map with combo filter

Carto Account

• Carto Stores with tables and columns

Chart/Map

• Chart and Map filtered by text input

Layer Demos

• Demonstration of multiple layer types (point, polygon, heatmap, torque)

Store Binding

• Grid and two Maps bound to one Carto Store

Fire Map

• Wildfire Map with two styled layers
• Wildfire Map with styled layer and heatmap layer

Wildfire Exploration

Carto Map Explorer

Presentations

SlideShare - SenchaCon 2016: Integrating Geospatial Maps & Big Data Using CARTO via Ext JS Components

Video can be found here of the talk.