/
utilities.js
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/
utilities.js
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define( [ 'utils/utils' ], function( Utils ) {
/** Create default data request dictionary */
function buildRequestDictionary( chart, dataset_id ) {
var request_dictionary = { groups : [] };
request_dictionary.id = dataset_id ? dataset_id : chart.get( 'dataset_id' );
var group_index = 0;
chart.groups.each( function( group ) {
var columns = {};
for ( var column_key in chart.definition.columns ) {
var column_settings = chart.definition.columns[ column_key ];
columns[ column_key ] = Utils.merge( { index : group.get( column_key ) }, column_settings );
}
request_dictionary.groups.push( Utils.merge({
key : ( ++group_index ) + ':' + group.get( 'key' ),
columns : columns
}, group.attributes ));
});
return request_dictionary;
};
/** Assists in assigning the viewport panels */
function panelHelper( app, options ) {
var self = this;
var process = options.process;
var chart = options.chart;
var request_dictionary = options.request_dictionary || buildRequestDictionary( app.chart );
var render = options.render;
var canvas_list = options.canvas_list;
request_dictionary.query_limit = chart.definition.query_limit;
request_dictionary.success = function() {
try {
if ( chart.settings.get( 'use_panels' ) === 'true' ) {
var valid = true;
for ( var group_index in request_dictionary.groups ) {
var group = request_dictionary.groups[ group_index ];
if (!render( canvas_list[ group_index ], [ group ] ) ) {
valid = false;
break;
}
}
if ( valid ) {
chart.state( 'ok', 'Multi-panel chart drawn.' );
}
} else {
if ( render( canvas_list[ 0 ], request_dictionary.groups ) ) {
chart.state( 'ok', 'Chart drawn.' );
}
}
process.resolve();
} catch ( err ) {
console.debug( 'FAILED: Utilities::panelHelper() - ' + err );
chart.state( 'failed', err );
process.reject();
}
};
request_dictionary.progress = function( percentage ) {
if ( chart.get('state') == 'wait' ) {
chart.state( 'wait', 'Loading data...' + percentage + '%' );
}
};
app.datasets.request( request_dictionary );
};
/** Get domain boundaries value */
function getDomains( groups, keys ) {
function _apply( operator, key ) {
var value = undefined;
for ( var group_index in groups ) {
var value_sub = d3[ operator ]( groups[ group_index ].values, function( d ) { return d[ key ] } );
value = value === undefined ? value_sub : Math[ operator ]( value, value_sub );
}
return value;
};
var result = {};
for( var index in keys ) {
var key = keys[ index ];
result[ key ] = {
min : _apply( 'min', key ),
max : _apply( 'max', key ),
};
}
return result;
};
/** Default series maker */
function makeSeries( groups, keys ) {
var plot_data = [];
for ( var group_index in groups ) {
var group = groups[ group_index ];
var data = [];
for ( var value_index in group.values ) {
var point = [];
if ( keys ) {
for ( var key_index in keys ) {
var column_index = keys[ key_index ];
point.push( group.values[ value_index ][ column_index ] );
}
} else {
for ( var column_index in group.values[ value_index ] ) {
point.push( group.values[ value_index ][ column_index ] );
}
}
data.push( point );
}
plot_data.push( data );
}
return plot_data;
};
/** Default category maker */
function makeCategories( groups, with_index ) {
var array = {};
// identify label columns
var chart_definition = groups[ 0 ];
for ( var key in chart_definition.columns ) {
var column_def = chart_definition.columns[ key ];
if ( column_def.is_label ) {
array[ key ] = [];
}
}
// collect string labels in array
if ( groups && groups[ 0 ] ) {
var group = groups[ 0 ];
for ( var j in group.values ) {
var value_dict = group.values[ j ];
for ( var key in array ) {
array[ key ].push ( String( value_dict[ key ] ) );
}
}
}
// index all values contained in label columns (for all groups)
mapCategories( array, groups );
return { array : array }
};
/** Apply default mapping index all values contained in label columns (for all groups) */
function mapCategories( array, groups ) {
for ( var i in groups ) {
var group = groups[ i ];
for ( var j in group.values ) {
var value_dict = group.values[ j ];
for ( var key in array ) {
value_dict[ key ] = parseInt( j )
}
}
}
};
/** Category make for unique category labels */
function makeUniqueCategories( groups, with_index ) {
var categories = {};
var array = {};
var counter = {};
var chart_definition = groups[ 0 ];
for( var key in chart_definition.columns ) {
var column_def = chart_definition.columns[ key ];
if ( column_def.is_label ) {
categories[ key ] = {};
array[ key ] = [];
counter[ key ] = 0;
}
}
// index all values contained in label columns (for all groups)
for ( var i in groups ) {
var group = groups[ i ];
for ( var j in group.values ) {
var value_dict = group.values[ j ];
for ( var key in categories ) {
var value = String( value_dict[ key ] );
if ( categories[ key ][ value ] === undefined ) {
categories[ key ][ value ] = counter[ key ];
array[ key ].push( with_index ? [counter[key], value] : value );
counter[ key ]++;
}
}
}
}
// convert group values into category indeces
for ( var i in groups ) {
var group = groups[ i ];
for ( var j in group.values ) {
var value_dict = group.values[ j ];
for ( var key in categories ) {
var value = String( value_dict[ key ] );
value_dict[ key ] = categories[ key ][ value ];
}
}
}
return {
categories : categories,
array : array,
counter : counter
}
};
/** Make axis */
function makeTickFormat ( options ) {
var type = options.type;
var precision = options.precision;
var categories = options.categories;
var formatter = options.formatter;
if ( type == 'hide' ) {
formatter( function() { return '' } );
} else if ( type == 'auto' ) {
if ( categories ) {
formatter( function( value ) { return categories[ value ] || '' } );
}
} else {
var d3format = function( d ) {
switch ( type ) {
case 's':
var prefix = d3.formatPrefix( d );
return prefix.scale( d ).toFixed() + prefix.symbol;
default :
return d3.format( '.' + precision + type )( d );
}
};
if ( categories ) {
formatter( function( value ) {
var label = categories[ value ];
if ( label ) {
if ( isNaN( label ) ) {
return label;
} else {
try {
return d3format( label );
} catch ( err ) {
return label;
}
}
} else {
return '';
}
});
} else {
formatter( function( value ) { return d3format( value ) } );
}
}
};
/** Add zoom handler */
function addZoom( options ) {
var scaleExtent = 100;
var yAxis = options.yAxis;
var xAxis = options.xAxis;
var xDomain = options.xDomain || xAxis.scale().domain;
var yDomain = options.yDomain || yAxis.scale().domain;
var redraw = options.redraw;
var svg = options.svg;
var xScale = xAxis.scale();
var yScale = yAxis.scale();
var x_boundary = xScale.domain().slice();
var y_boundary = yScale.domain().slice();
var d3zoom = d3.behavior.zoom();
xScale.nice();
yScale.nice();
function fixDomain( domain, boundary ) {
domain[ 0 ] = Math.min( Math.max( domain[ 0 ], boundary[ 0 ] ), boundary[ 1 ] - boundary[ 1 ]/scaleExtent );
domain[ 1 ] = Math.max( boundary[ 0 ] + boundary[ 1 ] / scaleExtent, Math.min( domain[ 1 ], boundary[ 1 ] ) );
return domain;
};
function zoomed() {
yDomain( fixDomain( yScale.domain(), y_boundary ) );
xDomain( fixDomain( xScale.domain(), x_boundary ) );
redraw();
};
function unzoomed() {
xDomain( x_boundary );
yDomain( y_boundary );
redraw();
d3zoom.scale( 1 );
d3zoom.translate( [ 0 , 0 ] );
};
d3zoom.x( xScale )
.y( yScale )
.scaleExtent( [ 1, scaleExtent ] )
.on( 'zoom', zoomed );
svg.call( d3zoom ).on( 'dblclick.zoom', unzoomed );
return d3zoom;
};
return {
buildRequestDictionary : buildRequestDictionary,
panelHelper : panelHelper,
makeCategories : makeCategories,
makeUniqueCategories : makeUniqueCategories,
makeSeries : makeSeries,
getDomains : getDomains,
mapCategories : mapCategories,
makeTickFormat : makeTickFormat,
addZoom : addZoom
}
});