mirror of
https://github.com/timberjoegithub/grafana-statusmap.git
synced 2026-07-22 15:53:09 +00:00
432 lines
13 KiB
JavaScript
432 lines
13 KiB
JavaScript
import angular from 'angular';
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import _ from 'lodash';
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import $ from 'jquery';
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import d3 from 'd3';
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import * as d3ScaleChromatic from './libs/d3-scale-chromatic/index';
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import {contextSrv} from 'app/core/core';
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import {tickStep} from 'app/core/utils/ticks';
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let mod = angular.module('grafana.directives');
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const LEGEND_STEP_WIDTH = 2;
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/**
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* Bigger color legend for opacity and spectrum modes editor.
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*/
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mod.directive('optionsColorLegend', function() {
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return {
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restrict: 'E',
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template: '<div class="status-heatmap-color-legend"><svg width="16.8rem" height="24px"></svg></div>',
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link: function(scope, elem, attrs) {
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let ctrl = scope.ctrl;
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let panel = scope.ctrl.panel;
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render();
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ctrl.events.on('render', function() {
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render();
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});
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function render() {
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let legendElem = $(elem).find('svg');
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let legendWidth = Math.floor(legendElem.outerWidth());
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if (panel.color.mode === 'spectrum') {
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let colorScheme = _.find(ctrl.colorSchemes, {value: panel.color.colorScheme});
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let colorScale = getColorScale(colorScheme, legendWidth);
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drawSimpleColorLegend(elem, colorScale);
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} else if (panel.color.mode === 'opacity') {
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let colorOptions = panel.color;
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drawSimpleOpacityLegend(elem, colorOptions);
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}
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}
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}
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};
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});
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/**
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* Graph legend with values.
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*/
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mod.directive('statusHeatmapLegend', function() {
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return {
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restrict: 'E',
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template: '<div class="status-heatmap-color-legend"><svg width="100px" height="6px"></svg></div>',
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link: function(scope, elem, attrs) {
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let ctrl = scope.ctrl;
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let panel = scope.ctrl.panel;
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render();
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ctrl.events.on('render', function() {
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render();
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});
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function render() {
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clearLegend(elem);
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if (!ctrl.panel.legend.show) {
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return
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}
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if (!_.isEmpty(ctrl.cardsData) && !_.isEmpty(ctrl.cardsData.cards)) {
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let rangeFrom = ctrl.cardsData.minValue;
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let rangeTo = ctrl.cardsData.maxValue;
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let maxValue = panel.color.max || rangeTo;
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let minValue = panel.color.min || rangeFrom;
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if (panel.color.mode === 'spectrum') {
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let colorScheme = _.find(ctrl.colorSchemes, {value: panel.color.colorScheme});
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drawColorLegend(elem, colorScheme, rangeFrom, rangeTo, maxValue, minValue);
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} else if (panel.color.mode === 'opacity') {
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let colorOptions = panel.color;
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drawOpacityLegend(elem, colorOptions, rangeFrom, rangeTo, maxValue, minValue);
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} else if (panel.color.mode === 'discrete') {
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let colorOptions = panel.color;
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drawDiscreteColorLegend(elem, colorOptions, ctrl.discreteHelper);
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}
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}
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}
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}
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};
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});
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function drawColorLegend(elem, colorScheme, rangeFrom, rangeTo, maxValue, minValue) {
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let legendElem = $(elem).find('svg');
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let legend = d3.select(legendElem.get(0));
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clearLegend(elem);
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let legendWidth = Math.floor(legendElem.outerWidth()) - 30; // narrow legendWidth by 30px to get space for first and last tick values
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let legendHeight = legendElem.attr("height");
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let rangeStep = (rangeTo - rangeFrom) / (legendWidth/LEGEND_STEP_WIDTH);
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// width in pixels in legend space of unit segment in range space
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// rangeStep * witdhFactor == width in pixels of one rangeStep
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let widthFactor = legendWidth / (rangeTo - rangeFrom);
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let valuesRange = d3.range(rangeFrom, rangeTo, rangeStep);
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let colorScale = getColorScale(colorScheme, maxValue, minValue);
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legend.selectAll(".status-heatmap-color-legend-rect")
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.data(valuesRange)
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.enter().append("rect")
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// translate from range space into pixels
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// and shift all rectangles to the right by 10
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.attr("x", d => d * widthFactor+10)
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.attr("y", 0)
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// rectangles are slightly overlaped to prevent gaps
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.attr("width", LEGEND_STEP_WIDTH+1)
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.attr("height", legendHeight)
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.attr("stroke-width", 0)
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.attr("fill", d => colorScale(d));
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drawLegendValues(elem, colorScale, rangeFrom, rangeTo, maxValue, minValue, legendWidth);
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}
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function drawOpacityLegend(elem, options, rangeFrom, rangeTo, maxValue, minValue) {
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let legendElem = $(elem).find('svg');
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let legend = d3.select(legendElem.get(0));
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clearLegend(elem);
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let legendWidth = Math.floor(legendElem.outerWidth()) - 30; // narrow legendWidth by 30px to get space for first and last tick values
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let legendHeight = legendElem.attr("height");
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let rangeStep = (rangeTo - rangeFrom) / (legendWidth/LEGEND_STEP_WIDTH);
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// width in pixels in legend space of unit segment in range space
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// rangeStep * witdhFactor == width in pixels of one rangeStep
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let widthFactor = legendWidth / (rangeTo - rangeFrom);
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let valuesRange = d3.range(rangeFrom, rangeTo, rangeStep);
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let opacityScale = getOpacityScale(options, maxValue, minValue);
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legend.selectAll(".status-heatmap-opacity-legend-rect")
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.data(valuesRange)
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.enter().append("rect")
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// translate from range space into pixels
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// and shift all rectangles to the right by 10
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.attr("x", d => d * widthFactor+10)
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.attr("y", 0)
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// rectangles are slightly overlaped to prevent gaps
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.attr("width", LEGEND_STEP_WIDTH+1)
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.attr("height", legendHeight)
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.attr("stroke-width", 0)
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.attr("fill", options.cardColor)
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.style("opacity", d => opacityScale(d));
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drawLegendValues(elem, opacityScale, rangeFrom, rangeTo, maxValue, minValue, legendWidth);
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}
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function drawDiscreteColorLegend(elem, colorOptions, discreteHelper) {
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let legendElem = $(elem).find('svg');
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let legend = d3.select(legendElem.get(0));
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clearLegend(elem);
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let thresholds = colorOptions.thresholds;
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let tooltips = _.map(thresholds, tr => tr.tooltip);
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let valuesNumber = thresholds.length;
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// graph width as a fallback
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let $heatmap = $(elem).parent().parent().parent().find('.status-heatmap-panel');
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let graphWidth = $heatmap.find('svg').attr("width");
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// calculate max width of tooltip and use it as width for each item
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let textWidth = [];
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legend.selectAll(".hidden-texts")
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.data(tooltips)
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.enter().append("text")
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.attr("class", "axis tick hidden-texts")
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.attr("font-family", "sans-serif")
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.text(d => d)
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.each(function(d,i) {
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let thisWidth = this.getBBox().width;
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textWidth.push(thisWidth);
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});
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legend.selectAll(".hidden-texts").remove();
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let legendWidth = Math.floor(_.min([
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graphWidth - 30,
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(_.max(textWidth) + 3) * valuesNumber,
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]));
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legendElem.attr("width", legendWidth);
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let legendHeight = legendElem.attr("height");
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let itemWidth = Math.floor(legendWidth / valuesNumber);
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let valuesRange = d3.range(valuesNumber); // from 0 to valuesNumber-1
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legend.selectAll(".status-heatmap-color-legend-rect")
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.data(valuesRange)
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.enter().append("rect")
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.attr("x", d => d*itemWidth)
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.attr("y", 0)
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.attr("width", itemWidth + 1) // Overlap rectangles to prevent gaps
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.attr("height", legendHeight)
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.attr("stroke-width", 0)
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.attr("fill", d => discreteHelper.getDiscreteColor(d));
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drawDiscreteLegendValues(elem, colorOptions, legendWidth);
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}
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function drawLegendValues(elem, colorScale, rangeFrom, rangeTo, maxValue, minValue, legendWidth) {
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let legendElem = $(elem).find('svg');
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let legend = d3.select(legendElem.get(0));
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if (legendWidth <= 0 || legendElem.get(0).childNodes.length === 0) {
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return;
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}
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let legendValueScale = d3.scaleLinear()
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.domain([0, rangeTo])
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.range([0, legendWidth]);
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let ticks = buildLegendTicks(0, rangeTo, maxValue, minValue);
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let xAxis = d3.axisBottom(legendValueScale)
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.tickValues(ticks)
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.tickSize(2);
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let colorRect = legendElem.find(":first-child");
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let posY = getSvgElemHeight(legendElem) + 2;
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let posX = getSvgElemX(colorRect);
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d3.select(legendElem.get(0)).append("g")
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.attr("class", "axis")
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.attr("transform", "translate(" + posX + "," + posY + ")")
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.call(xAxis);
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legend.select(".axis").select(".domain").remove();
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}
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function drawDiscreteLegendValues(elem, colorOptions, legendWidth) {
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let thresholds = colorOptions.thresholds;
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let legendElem = $(elem).find('svg');
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let legend = d3.select(legendElem.get(0));
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if (legendWidth <= 0 || legendElem.get(0).childNodes.length === 0) {
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return;
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}
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let valuesNumber = thresholds.length;
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let rangeStep = Math.floor(legendWidth / valuesNumber);
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let valuesRange = d3.range(0, legendWidth, rangeStep);
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let legendValueScale = d3.scaleLinear()
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.domain([0, valuesNumber])
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.range([0, legendWidth]);
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let thresholdValues = [];
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let thresholdTooltips = [];
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for (let i = 0; i < thresholds.length; i++) {
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thresholdValues.push(thresholds[i].value);
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thresholdTooltips.push(thresholds[i].tooltip);
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}
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let xAxis = d3.axisBottom(legendValueScale)
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.tickValues(d3.range(0, valuesNumber, 1)) //thresholdValues)
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.tickSize(2)
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.tickFormat((t) => {
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let i = Math.floor(t);
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let v = thresholdTooltips[i];
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if (v != undefined) {
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return ""+v;
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} else {
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v = thresholdValues[i];
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if (v != undefined) {
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return ""+v;
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} else {
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return "n/a";
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}
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}
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});
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let colorRect = legendElem.find(":first-child");
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let posY = getSvgElemHeight(legendElem) + 2;
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let posX = getSvgElemX(colorRect) + Math.floor(rangeStep/2);
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d3.select(legendElem.get(0)).append("g")
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.attr("class", "axis")
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.attr("transform", "translate(" + posX + "," + posY + ")")
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.call(xAxis);
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legend.select(".axis").select(".domain").remove();
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}
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function drawSimpleColorLegend(elem, colorScale) {
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let legendElem = $(elem).find('svg');
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let legend = d3.select(legendElem.get(0));
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clearLegend(elem);
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let legendWidth = Math.floor(legendElem.outerWidth());
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let legendHeight = legendElem.attr("height");
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if (legendWidth) {
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let valuesRange = d3.range(0, legendWidth, LEGEND_STEP_WIDTH);
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legend.selectAll(".status-heatmap-color-legend-rect")
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.data(valuesRange)
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.enter().append("rect")
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.attr("x", d => d)
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.attr("y", 0)
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.attr("width", LEGEND_STEP_WIDTH + 1) // Overlap rectangles to prevent gaps
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.attr("height", legendHeight)
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.attr("stroke-width", 0)
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.attr("fill", d => colorScale(d));
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}
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}
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function drawSimpleOpacityLegend(elem, options) {
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let legendElem = $(elem).find('svg');
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let legend = d3.select(legendElem.get(0));
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clearLegend(elem);
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let legendWidth = Math.floor(legendElem.outerWidth());
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let legendHeight = legendElem.attr("height");
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if (legendWidth) {
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let legendOpacityScale;
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if (options.colorScale === 'linear') {
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legendOpacityScale = d3.scaleLinear()
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.domain([0, legendWidth])
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.range([0, 1]);
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} else if (options.colorScale === 'sqrt') {
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legendOpacityScale = d3.scalePow().exponent(options.exponent)
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.domain([0, legendWidth])
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.range([0, 1]);
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}
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let valuesRange = d3.range(0, legendWidth, LEGEND_STEP_WIDTH);
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legend.selectAll(".status-heatmap-opacity-legend-rect")
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.data(valuesRange)
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.enter().append("rect")
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.attr("x", d => d)
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.attr("y", 0)
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.attr("width", LEGEND_STEP_WIDTH+1)
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.attr("height", legendHeight)
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.attr("stroke-width", 0)
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.attr("fill", options.cardColor)
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.style("opacity", d => legendOpacityScale(d));
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}
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}
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function clearLegend(elem) {
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let legendElem = $(elem).find('svg');
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legendElem.empty();
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}
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function getColorScale(colorScheme, maxValue, minValue = 0) {
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let colorInterpolator = d3ScaleChromatic[colorScheme.value];
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let colorScaleInverted = colorScheme.invert === 'always' ||
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(colorScheme.invert === 'dark' && !contextSrv.user.lightTheme);
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let start = colorScaleInverted ? maxValue : minValue;
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let end = colorScaleInverted ? minValue : maxValue;
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return d3.scaleSequential(colorInterpolator).domain([start, end]);
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}
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function getOpacityScale(options, maxValue, minValue = 0) {
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let legendOpacityScale;
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if (options.colorScale === 'linear') {
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legendOpacityScale = d3.scaleLinear()
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.domain([minValue, maxValue])
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.range([0, 1]);
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} else if (options.colorScale === 'sqrt') {
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legendOpacityScale = d3.scalePow().exponent(options.exponent)
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.domain([minValue, maxValue])
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.range([0, 1]);
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}
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return legendOpacityScale;
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}
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function getSvgElemX(elem) {
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let svgElem = elem.get(0);
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if (svgElem && svgElem.x && svgElem.x.baseVal) {
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return svgElem.x.baseVal.value;
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} else {
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return 0;
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}
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}
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function getSvgElemHeight(elem) {
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let svgElem = elem.get(0);
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if (svgElem && svgElem.height && svgElem.height.baseVal) {
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return svgElem.height.baseVal.value;
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} else {
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return 0;
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}
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}
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function buildLegendTicks(rangeFrom, rangeTo, maxValue, minValue) {
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let range = rangeTo - rangeFrom;
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let tickStepSize = tickStep(rangeFrom, rangeTo, 3);
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let ticksNum = Math.round(range / tickStepSize);
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let ticks = [];
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for (let i = 0; i < ticksNum; i++) {
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let current = tickStepSize * i;
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// Add user-defined min and max if it had been set
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if (isValueCloseTo(minValue, current, tickStepSize)) {
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ticks.push(minValue);
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continue;
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} else if (minValue < current) {
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ticks.push(minValue);
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}
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if (isValueCloseTo(maxValue, current, tickStepSize)) {
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ticks.push(maxValue);
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continue;
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} else if (maxValue < current) {
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ticks.push(maxValue);
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}
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ticks.push(tickStepSize * i);
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}
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if (!isValueCloseTo(maxValue, rangeTo, tickStepSize)) {
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ticks.push(maxValue);
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}
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ticks.push(rangeTo);
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ticks = _.sortBy(_.uniq(ticks));
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return ticks;
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}
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function isValueCloseTo(val, valueTo, step) {
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let diff = Math.abs(val - valueTo);
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return diff < step * 0.3;
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}
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