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44 lines
1.3 KiB
44 lines
1.3 KiB
;(function(undefined) {
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'use strict';
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if (typeof sigma === 'undefined')
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throw 'sigma is not declared';
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// Initialize packages:
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sigma.utils.pkg('sigma.canvas.labels');
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/**
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* This label renderer will just display the label on the right of the node.
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*
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* @param {object} node The node object.
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* @param {CanvasRenderingContext2D} context The canvas context.
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* @param {configurable} settings The settings function.
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*/
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sigma.canvas.labels.def = function(node, context, settings) {
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var fontSize,
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prefix = settings('prefix') || '',
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size = node[prefix + 'size'];
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if (size < settings('labelThreshold'))
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return;
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if (!node.label || typeof node.label !== 'string')
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return;
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fontSize = (settings('labelSize') === 'fixed') ?
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settings('defaultLabelSize') :
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settings('labelSizeRatio') * size;
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context.font = (settings('fontStyle') ? settings('fontStyle') + ' ' : '') +
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fontSize + 'px ' + settings('font');
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context.fillStyle = (settings('labelColor') === 'node') ?
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(node.color || settings('defaultNodeColor')) :
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settings('defaultLabelColor');
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context.fillText(
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node.label,
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Math.round(node[prefix + 'x'] + size + 3),
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Math.round(node[prefix + 'y'] + fontSize / 3)
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);
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};
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}).call(this);
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