# Code coverage report for lib/ViewerHelper.js

## Statements: 19.12% (13 / 68) Branches: 0% (0 / 26) Functions: 7.69% (1 / 13) Lines: 19.12% (13 / 68) Ignored: none

All files » lib/ » ViewerHelper.js

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    1/*jslint node: true */
    /*jshint laxbreak: true */
    "use strict" ;

    var d3 = require("d3");
    var _ = require("underscore");
    var TooltipFactory = require("./TooltipFactory");
    var FeatureFactory = require("./FeatureFactory");
    var VariantFilterDialog = require("./VariantFilterDialog");

    var ViewerHelper = function() {
        var mousedownXY = {x: -1, y: -1}, mouseupXY = {x: -2, y: -2};
        return {
            createSVG: function(container, width, height, fv, clazz) {
                var svg = container
                    .append('svg')
                    .attr('width', width)
                    .attr('height', height)
                    .on('mousedown', function() {
                        mousedownXY = {x: d3.event.pageX, y: d3.event.pageY};
                        mouseupXY = {x: -2, y: -2};
                    })
                    .on('mouseup', function() {
                        mouseupXY = {x: d3.event.pageX, y: d3.event.pageY};
                        if ((mousedownXY.x === mouseupXY.x) && (mousedownXY.y === mouseupXY.y)
                            && !fv.overFeature && fv.selectedFeature ) {
                            ViewerHelper.selectFeature(fv.selectedFeature, fv.selectedFeatureElement, fv);
                        }
                        mousedownXY = {x: -1, y: -1};
                    })
                    .call(fv.zoom);

                if (clazz) {
                    svg.attr('class', clazz);
                }
                svg.append('g').append('path')
                    .classed('up_pftv_shadow', true)
                    .attr('d', 'M-1,-1')
                    .attr('transform', 'translate(-1,-1)')
                    .attr('height', height);

                return svg;
            }
        };
    }();

    ViewerHelper.shadowPath = function (feature, fv, height) {
        var aaWidth = fv.xScale(2) - fv.xScale(1);
        var gapRegion = aaWidth/2;
        var width = aaWidth * (feature.end ? feature.end - feature.begin + 1 : 1);
        var path;
        if (!feature.type) {
            path = 'M-1,-1';
        } else if (FeatureFactory.isContinuous(feature.type.name)) {
            path = 'M' + -(gapRegion) + ',0'
                + 'L' + (-gapRegion+width) + ',0'
                + 'L' + (-gapRegion+width) + ',' + height
                + 'L' + -(gapRegion) + ',' + height
                + 'Z';
        } else {
            path = 'M' + -(gapRegion) + ',0'
                + 'L' + (-gapRegion+width) + ',0'
                + 'L' + (-gapRegion+width) + ',' + height
                + 'L' + (-gapRegion+width-aaWidth) + ',' + height
                + 'L' + (-gapRegion+width-aaWidth) + ',0'
                + 'L' + (-gapRegion+aaWidth) + ',0'
                + 'L' + (-gapRegion+aaWidth) + ',' + height
                + 'L' + (-gapRegion) + ',' + height
                + 'Z';
        }
        return path;
    };

    ViewerHelper.updateShadow = function(feature, fv) {
        var xTranslate = fv.xScale(feature.begin);
        d3.selectAll('.up_pftv_shadow')
            .attr('d', function() {
                var height = d3.select(this).attr('height');
                return ViewerHelper.shadowPath(feature, fv, height);
            })
            .attr('transform', 'translate(' + xTranslate + ',0)');
    };

    ViewerHelper.selectFeature = function(feature, elem, fv) {
        var selectedElem = d3.select(elem);
        var previousSelection = {feature: fv.selectedFeature, elem: fv.selectedFeatureElement};
        if (feature === fv.selectedFeature) {
            fv.selectedFeature = undefined;
            fv.selectedFeatureElement = undefined;
            d3.selectAll('.up_pftv_shadow')
                .attr('d', 'M-1,-1')
                .attr('transform', 'translate(-1,-1)');
        } else {
            fv.selectedFeature = feature;
            fv.selectedFeatureElement = elem;
            this.updateShadow(feature, fv);
        }
        var selectedPath = selectedElem.classed('up_pftv_activeFeature');
        d3.selectAll('svg path.up_pftv_activeFeature').classed('up_pftv_activeFeature', false);
        //it is not active anymore
        selectedElem.classed('up_pftv_activeFeature', !selectedPath);
        fv.updateFeatureSelector();
        if (previousSelection.feature) {
            fv.dispatcher.featureDeselected(
                {feature: previousSelection.feature, color: d3.select(previousSelection.elem).style("fill")}
            );
        }
        if (feature !== previousSelection.feature) {
            if (previousSelection.elem) {
                d3.select(previousSelection.elem).classed('up_pftv_activeFeature', false);
            }
            fv.dispatcher.featureSelected({feature: fv.selectedFeature, color: selectedElem.style("fill")});
        }
    };

    ViewerHelper.addEventsClassAndTitle = function(catTitle, elements, fv, container) {
        elements
            .classed('up_pftv_activeFeature', function(d) {
                return d === fv.selectedFeature;
            })
            .on('click', function(d){
                var elem = d3.select(this);
                if (!elem.classed('up_pftv_variant_hidden')) {
                    if (!elem.classed('up_pftv_activeFeature')) {
                        TooltipFactory.createTooltip(fv, catTitle, d, container);
                    } else {
                        var tooltipContainer = d3.selectAll('.up_pftv_tooltip-container')
                            .transition(20)
                            .style('opacity', 0)
                            .style('display', 'none');
                        tooltipContainer.remove();
                    }
                    ViewerHelper.selectFeature(d, this, fv);
                }
            })
            .on('mouseover', function() {
                fv.overFeature = true;
            })
            .on('mouseout', function() {
                fv.overFeature = false;
            });
    };

    module.exports = ViewerHelper;