+++ /dev/null
-nv.models.legend = function() {
- "use strict";
- //============================================================
- // Public Variables with Default Settings
- //------------------------------------------------------------
-
- var margin = {top: 5, right: 0, bottom: 5, left: 0}
- , width = 400
- , height = 20
- , getKey = function(d) { return d.key }
- , color = nv.utils.defaultColor()
- , align = true
- , rightAlign = true
- , updateState = true //If true, legend will update data.disabled and trigger a 'stateChange' dispatch.
- , radioButtonMode = false //If true, clicking legend items will cause it to behave like a radio button. (only one can be selected at a time)
- , dispatch = d3.dispatch('legendClick', 'legendDblclick', 'legendMouseover', 'legendMouseout', 'stateChange')
- ;
-
- //============================================================
-
-
- function chart(selection) {
- selection.each(function(data) {
- var availableWidth = width - margin.left - margin.right,
- container = d3.select(this);
-
-
- //------------------------------------------------------------
- // Setup containers and skeleton of chart
-
- var wrap = container.selectAll('g.nv-legend').data([data]);
- var gEnter = wrap.enter().append('g').attr('class', 'nvd3 nv-legend').append('g');
- var g = wrap.select('g');
-
- wrap.attr('transform', 'translate(' + margin.left + ',' + margin.top + ')');
-
- //------------------------------------------------------------
-
-
- var series = g.selectAll('.nv-series')
- .data(function(d) { return d });
- var seriesEnter = series.enter().append('g').attr('class', 'nv-series')
- .on('mouseover', function(d,i) {
- dispatch.legendMouseover(d,i); //TODO: Make consistent with other event objects
- })
- .on('mouseout', function(d,i) {
- dispatch.legendMouseout(d,i);
- })
- .on('click', function(d,i) {
- dispatch.legendClick(d,i);
- if (updateState) {
- if (radioButtonMode) {
- //Radio button mode: set every series to disabled,
- // and enable the clicked series.
- data.forEach(function(series) { series.disabled = true});
- d.disabled = false;
- }
- else {
- d.disabled = !d.disabled;
- if (data.every(function(series) { return series.disabled})) {
- //the default behavior of NVD3 legends is, if every single series
- // is disabled, turn all series' back on.
- data.forEach(function(series) { series.disabled = false});
- }
- }
- dispatch.stateChange({
- disabled: data.map(function(d) { return !!d.disabled })
- });
- }
- })
- .on('dblclick', function(d,i) {
- dispatch.legendDblclick(d,i);
- if (updateState) {
- //the default behavior of NVD3 legends, when double clicking one,
- // is to set all other series' to false, and make the double clicked series enabled.
- data.forEach(function(series) {
- series.disabled = true;
- });
- d.disabled = false;
- dispatch.stateChange({
- disabled: data.map(function(d) { return !!d.disabled })
- });
- }
- });
- seriesEnter.append('circle')
- .style('stroke-width', 2)
- .attr('class','nv-legend-symbol')
- .attr('r', 5);
- seriesEnter.append('text')
- .attr('text-anchor', 'start')
- .attr('class','nv-legend-text')
- .attr('dy', '.32em')
- .attr('dx', '8');
- series.classed('disabled', function(d) { return d.disabled });
- series.exit().remove();
- series.select('circle')
- .style('fill', function(d,i) { return d.color || color(d,i)})
- .style('stroke', function(d,i) { return d.color || color(d, i) });
- series.select('text').text(getKey);
-
-
- //TODO: implement fixed-width and max-width options (max-width is especially useful with the align option)
-
- // NEW ALIGNING CODE, TODO: clean up
- if (align) {
-
- var seriesWidths = [];
- series.each(function(d,i) {
- var legendText = d3.select(this).select('text');
- var nodeTextLength;
- try {
- nodeTextLength = legendText.node().getComputedTextLength();
- }
- catch(e) {
- nodeTextLength = nv.utils.calcApproxTextWidth(legendText);
- }
-
- seriesWidths.push(nodeTextLength + 28); // 28 is ~ the width of the circle plus some padding
- });
-
- var seriesPerRow = 0;
- var legendWidth = 0;
- var columnWidths = [];
-
- while ( legendWidth < availableWidth && seriesPerRow < seriesWidths.length) {
- columnWidths[seriesPerRow] = seriesWidths[seriesPerRow];
- legendWidth += seriesWidths[seriesPerRow++];
- }
- if (seriesPerRow === 0) seriesPerRow = 1; //minimum of one series per row
-
-
- while ( legendWidth > availableWidth && seriesPerRow > 1 ) {
- columnWidths = [];
- seriesPerRow--;
-
- for (var k = 0; k < seriesWidths.length; k++) {
- if (seriesWidths[k] > (columnWidths[k % seriesPerRow] || 0) )
- columnWidths[k % seriesPerRow] = seriesWidths[k];
- }
-
- legendWidth = columnWidths.reduce(function(prev, cur, index, array) {
- return prev + cur;
- });
- }
-
- var xPositions = [];
- for (var i = 0, curX = 0; i < seriesPerRow; i++) {
- xPositions[i] = curX;
- curX += columnWidths[i];
- }
-
- series
- .attr('transform', function(d, i) {
- return 'translate(' + xPositions[i % seriesPerRow] + ',' + (5 + Math.floor(i / seriesPerRow) * 20) + ')';
- });
-
- //position legend as far right as possible within the total width
- if (rightAlign) {
- g.attr('transform', 'translate(' + (width - margin.right - legendWidth) + ',' + margin.top + ')');
- }
- else {
- g.attr('transform', 'translate(0' + ',' + margin.top + ')');
- }
-
- height = margin.top + margin.bottom + (Math.ceil(seriesWidths.length / seriesPerRow) * 20);
-
- } else {
-
- var ypos = 5,
- newxpos = 5,
- maxwidth = 0,
- xpos;
- series
- .attr('transform', function(d, i) {
- var length = d3.select(this).select('text').node().getComputedTextLength() + 28;
- xpos = newxpos;
-
- if (width < margin.left + margin.right + xpos + length) {
- newxpos = xpos = 5;
- ypos += 20;
- }
-
- newxpos += length;
- if (newxpos > maxwidth) maxwidth = newxpos;
-
- return 'translate(' + xpos + ',' + ypos + ')';
- });
-
- //position legend as far right as possible within the total width
- g.attr('transform', 'translate(' + (width - margin.right - maxwidth) + ',' + margin.top + ')');
-
- height = margin.top + margin.bottom + ypos + 15;
-
- }
-
- });
-
- return chart;
- }
-
-
- //============================================================
- // Expose Public Variables
- //------------------------------------------------------------
-
- chart.dispatch = dispatch;
- chart.options = nv.utils.optionsFunc.bind(chart);
-
- chart.margin = function(_) {
- if (!arguments.length) return margin;
- margin.top = typeof _.top != 'undefined' ? _.top : margin.top;
- margin.right = typeof _.right != 'undefined' ? _.right : margin.right;
- margin.bottom = typeof _.bottom != 'undefined' ? _.bottom : margin.bottom;
- margin.left = typeof _.left != 'undefined' ? _.left : margin.left;
- return chart;
- };
-
- chart.width = function(_) {
- if (!arguments.length) return width;
- width = _;
- return chart;
- };
-
- chart.height = function(_) {
- if (!arguments.length) return height;
- height = _;
- return chart;
- };
-
- chart.key = function(_) {
- if (!arguments.length) return getKey;
- getKey = _;
- return chart;
- };
-
- chart.color = function(_) {
- if (!arguments.length) return color;
- color = nv.utils.getColor(_);
- return chart;
- };
-
- chart.align = function(_) {
- if (!arguments.length) return align;
- align = _;
- return chart;
- };
-
- chart.rightAlign = function(_) {
- if (!arguments.length) return rightAlign;
- rightAlign = _;
- return chart;
- };
-
- chart.updateState = function(_) {
- if (!arguments.length) return updateState;
- updateState = _;
- return chart;
- };
-
- chart.radioButtonMode = function(_) {
- if (!arguments.length) return radioButtonMode;
- radioButtonMode = _;
- return chart;
- };
-
- //============================================================
-
-
- return chart;
-}
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