plotly.js/src/components/shapes/draw_newshape/defaults.js

The open source javascript graphing library that powers plotly

'use strict';

var Color = require('../../color');
var Lib = require('../../../lib');


function dfltLabelYanchor(isLine, labelTextPosition) {
    // If shape is a line, default y-anchor is 'bottom' (so that text is above line by default)
    // Otherwise, default y-anchor is equal to y-component of `textposition`
    // (so that text is positioned inside shape bounding box by default)
    return isLine ? 'bottom' :
        labelTextPosition.indexOf('top') !== -1 ? 'top' :
        labelTextPosition.indexOf('bottom') !== -1 ? 'bottom' : 'middle';
}

module.exports = function supplyDrawNewShapeDefaults(layoutIn, layoutOut, coerce) {
    coerce('newshape.visible');
    coerce('newshape.name');
    coerce('newshape.showlegend');
    coerce('newshape.legend');
    coerce('newshape.legendwidth');
    coerce('newshape.legendgroup');
    coerce('newshape.legendgrouptitle.text');
    Lib.coerceFont(coerce, 'newshape.legendgrouptitle.font');
    coerce('newshape.legendrank');

    coerce('newshape.drawdirection');
    coerce('newshape.layer');
    coerce('newshape.fillcolor');
    coerce('newshape.fillrule');
    coerce('newshape.opacity');
    var newshapeLineWidth = coerce('newshape.line.width');
    if(newshapeLineWidth) {
        var bgcolor = (layoutIn || {}).plot_bgcolor || '#FFF';
        coerce('newshape.line.color', Color.contrast(bgcolor));
        coerce('newshape.line.dash');
    }

    var isLine = layoutIn.dragmode === 'drawline';
    var labelText = coerce('newshape.label.text');
    var labelTextTemplate = coerce('newshape.label.texttemplate');
    if(labelText || labelTextTemplate) {
        coerce('newshape.label.textangle');
        var labelTextPosition = coerce('newshape.label.textposition', isLine ? 'middle' : 'middle center');
        coerce('newshape.label.xanchor');
        coerce('newshape.label.yanchor', dfltLabelYanchor(isLine, labelTextPosition));
        coerce('newshape.label.padding');
        Lib.coerceFont(coerce, 'newshape.label.font', layoutOut.font);
    }

    coerce('activeshape.fillcolor');
    coerce('activeshape.opacity');
};