449 lines
No EOL
11 KiB
JavaScript
449 lines
No EOL
11 KiB
JavaScript
L.Control.Elevation = L.Control.extend({
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options: {
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position: "topright",
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theme: "lime-theme",
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width: 600,
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height: 175,
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margins: {
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top: 10,
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right: 20,
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bottom: 30,
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left: 50
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},
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useHeightIndicator: true,
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interpolation: "linear",
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hoverNumber: {
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decimalsX: 3,
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decimalsY: 0,
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formatter: undefined
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},
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xTicks: undefined,
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yTicks: undefined,
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collapsed: false
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},
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onRemove: function(map) {
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this._container = null;
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this._data = null;
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this._dist = null;
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},
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onAdd: function(map) {
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this._map = map;
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var opts = this.options;
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var margin = opts.margins;
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opts.width = opts.width - margin.left - margin.right;
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opts.height = opts.height - margin.top - margin.bottom;
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opts.xTicks = opts.xTicks || Math.round(opts.width / 75);
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opts.yTicks = opts.yTicks || Math.round(opts.height / 30);
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opts.hoverNumber.formatter = opts.hoverNumber.formatter || this._formatter;
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//append theme name on body
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d3.select("body").classed(opts.theme, true);
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var x = this._x = d3.scale.linear()
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.range([0, opts.width]);
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var y = this._y = d3.scale.linear()
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.range([opts.height, 0]);
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var area = this._area = d3.svg.area()
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.interpolate(opts.interpolation)
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.x(function(d) {
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return x(d.dist);
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})
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.y0(opts.height)
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.y1(function(d) {
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return y(d.altitude);
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});
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var container = this._container = L.DomUtil.create("div", "elevation");
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this._initToggle();
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var complWidth = opts.width + margin.left + margin.right;
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var cont = d3.select(container);
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cont.attr("width", complWidth);
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var svg = cont.append("svg");
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svg.attr("width", complWidth)
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.attr("class", "background")
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.attr("height", opts.height + margin.top + margin.bottom)
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.append("g")
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.attr("transform", "translate(" + margin.left + "," + margin.top + ")");
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var line = d3.svg.line();
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line = line
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.x(function(d) {
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return d3.mouse(svg.select("g"))[0];
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})
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.y(function(d) {
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return opts.height;
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});
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var g = d3.select(this._container).select("svg").select("g");
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this._areapath = g.append("path")
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.attr("class", "area");
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var background = this._background = g.append("rect")
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.attr("width", opts.width)
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.attr("height", opts.height)
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.style("fill", "none")
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.style("stroke", "none")
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.style("pointer-events", "all");
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background.on("mousemove", this._mousemoveHandler.bind(this));
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background.on("mouseout", this._mouseoutHandler.bind(this));
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this._xaxisgraphicnode = g.append("g");
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this._yaxisgraphicnode = g.append("g");
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this._appendXaxis(this._xaxisgraphicnode);
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this._appendYaxis(this._yaxisgraphicnode);
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var focusG = this._focusG = g.append("g");
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this._mousefocus = focusG.append('svg:line')
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.attr('class', 'mouse-focus-line')
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.attr('x2', '0')
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.attr('y2', '0')
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.attr('x1', '0')
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.attr('y1', '0');
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this._focuslabelX = focusG.append("svg:text")
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.style("pointer-events", "none")
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.attr("class", "mouse-focus-label-x");
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this._focuslabelY = focusG.append("svg:text")
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.style("pointer-events", "none")
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.attr("class", "mouse-focus-label-y");
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return container;
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},
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_initToggle: function () {
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/* inspired by L.Control.Layers */
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var container = this._container;
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//Makes this work on IE10 Touch devices by stopping it from firing a mouseout event when the touch is released
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container.setAttribute('aria-haspopup', true);
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if (!L.Browser.touch) {
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L.DomEvent
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.disableClickPropagation(container);
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//.disableScrollPropagation(container);
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} else {
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L.DomEvent.on(container, 'click', L.DomEvent.stopPropagation);
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}
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if (this.options.collapsed)
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{
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this._collapse();
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if (!L.Browser.android) {
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L.DomEvent
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.on(container, 'mouseover', this._expand, this)
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.on(container, 'mouseout', this._collapse, this);
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}
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var link = this._button = L.DomUtil.create('a', 'elevation-toggle', container);
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link.href = '#';
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link.title = 'Elevation';
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if (L.Browser.touch) {
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L.DomEvent
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.on(link, 'click', L.DomEvent.stop)
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.on(link, 'click', this._expand, this);
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}
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else {
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L.DomEvent.on(link, 'focus', this._expand, this);
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}
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this._map.on('click', this._collapse, this);
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// TODO keyboard accessibility
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}
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},
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_expand: function () {
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this._container.className = this._container.className.replace(' elevation-collapsed', '');
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},
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_collapse: function () {
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L.DomUtil.addClass(this._container, 'elevation-collapsed');
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},
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/*
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* Fromatting funciton using the given decimals and seperator
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*/
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_formatter: function(num, dec, sep) {
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var res;
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if (dec === 0) {
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res = Math.round(num) + "";
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} else {
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res = L.Util.formatNum(num, dec) + "";
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}
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var numbers = res.split(".");
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if (numbers[1]) {
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var d = dec - numbers[1].length;
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for (; d > 0; d--) {
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numbers[1] += "0";
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}
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res = numbers.join(sep || ".");
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}
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return res;
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},
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_appendYaxis: function(y) {
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y.attr("class", "y axis")
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.call(d3.svg.axis()
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.scale(this._y)
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.ticks(this.options.yTicks)
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.orient("left"))
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.append("text")
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.attr("x", 15)
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.style("text-anchor", "end")
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.text("m");
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},
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_appendXaxis: function(x) {
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x.attr("class", "x axis")
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.attr("transform", "translate(0," + this.options.height + ")")
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.call(d3.svg.axis()
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.scale(this._x)
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.ticks(this.options.xTicks)
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.orient("bottom"))
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.append("text")
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.attr("x", this.options.width + 15)
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.style("text-anchor", "end")
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.text("km");
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},
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_updateAxis: function() {
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this._xaxisgraphicnode.selectAll("axis").remove();
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this._yaxisgraphicnode.selectAll("axis").remove();
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this._appendXaxis(this._xaxisgraphicnode);
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this._appendYaxis(this._yaxisgraphicnode);
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},
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_mouseoutHandler: function() {
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if (this._marker) {
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this._map.removeLayer(this._marker);
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this._marker = null;
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}
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if (this._mouseHeightFocus) {
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this._mouseHeightFocus.style("visibility", "hidden");
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this._mouseHeightFocusLabel.style("visibility", "hidden");
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}
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if (this._pointG) {
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this._pointG.style("visibility", "hidden");
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}
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this._focusG.style("visibility", "hidden");
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},
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_mousemoveHandler: function(d, i, ctx) {
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if (!this._data || this._data.length === 0) {
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return;
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}
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var coords = d3.mouse(this._background.node());
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var opts = this.options;
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this._focusG.style("visibility", "visible");
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this._mousefocus.attr('x1', coords[0])
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.attr('y1', 0)
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.attr('x2', coords[0])
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.attr('y2', opts.height)
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.classed('hidden', false);
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var bisect = d3.bisector(function(d) {
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return d.dist;
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}).left;
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var xinvert = this._x.invert(coords[0]),
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item = bisect(this._data, xinvert),
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alt = this._data[item].altitude,
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dist = this._data[item].dist,
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ll = this._data[item].latlng,
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numY = opts.hoverNumber.formatter(alt, opts.hoverNumber.decimalsY),
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numX = opts.hoverNumber.formatter(dist, opts.hoverNumber.decimalsX);
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this._focuslabelX.attr("x", coords[0])
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.text(numY + " m");
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this._focuslabelY.attr("y", opts.height - 5)
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.attr("x", coords[0])
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.text(numX + " km");
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var layerpoint = this._map.latLngToLayerPoint(ll);
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//if we use a height indicator we create one with SVG
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//otherwise we show a marker
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if (opts.useHeightIndicator) {
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if (!this._mouseHeightFocus) {
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var heightG = d3.select(".leaflet-overlay-pane svg")
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.append("g");
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this._mouseHeightFocus = heightG.append('svg:line')
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.attr('class', 'height-focus line')
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.attr('x2', '0')
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.attr('y2', '0')
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.attr('x1', '0')
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.attr('y1', '0');
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var pointG = this._pointG = heightG.append("g");
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pointG.append("svg:circle")
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.attr("r", 6)
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.attr("cx", 0)
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.attr("cy", 0)
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.attr("class", "height-focus circle-lower");
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this._mouseHeightFocusLabel = heightG.append("svg:text")
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.attr("class", "height-focus-label")
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.style("pointer-events", "none");
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}
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var normalizedAlt = this.options.height / this._maxElevation * alt;
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var normalizedY = layerpoint.y - normalizedAlt;
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this._mouseHeightFocus.attr("x1", layerpoint.x)
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.attr("x2", layerpoint.x)
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.attr("y1", layerpoint.y)
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.attr("y2", normalizedY)
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.style("visibility", "visible");
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this._pointG.attr("transform", "translate(" + layerpoint.x + "," + layerpoint.y + ")")
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.style("visibility", "visible");
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this._mouseHeightFocusLabel.attr("x", layerpoint.x)
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.attr("y", normalizedY)
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.text(alt + " m")
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.style("visibility", "visible");
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} else {
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if (!this._marker) {
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this._marker = new L.Marker(ll).addTo(this._map);
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} else {
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this._marker.setLatLng(ll);
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}
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}
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},
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/*
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* Parsing of GeoJSON data lines and their elevation in z-coordinate
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*/
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_addGeoJSONData: function(coords) {
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if (coords) {
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var data = this._data || [];
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var dist = this._dist || 0;
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var ele = this._maxElevation || 0;
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for (var i = 0; i < coords.length; i++) {
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var s = new L.LatLng(coords[i][1], coords[i][0]);
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var e = new L.LatLng(coords[i ? i - 1 : 0][1], coords[i ? i - 1 : 0][0]);
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var newdist = s.distanceTo(e);
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dist = dist + newdist / 1000;
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ele = ele < coords[i][2] ? coords[i][2] : ele;
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data.push({
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dist: dist,
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altitude: coords[i][2],
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x: coords[i][0],
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y: coords[i][1],
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latlng: s
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});
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}
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this._dist = dist;
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this._data = data;
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this._maxElevation = ele;
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}
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},
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/*
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* Parsing function for GPX data as used by https://github.com/mpetazzoni/leaflet-gpx
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*/
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_addGPXdata: function(coords) {
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if (coords) {
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var data = this._data || [];
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var dist = this._dist || 0;
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var ele = this._maxElevation || 0;
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for (var i = 0; i < coords.length; i++) {
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var s = coords[i];
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var e = coords[i ? i - 1 : 0];
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var newdist = s.distanceTo(e);
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dist = dist + newdist / 1000;
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ele = ele < s.meta.ele ? s.meta.ele : ele;
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data.push({
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dist: dist,
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altitude: s.meta.ele,
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x: s.lng,
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y: s.lat,
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latlng: s
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});
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}
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this._dist = dist;
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this._data = data;
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this._maxElevation = ele;
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}
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},
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_addData: function(d) {
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var geom = d && d.geometry && d.geometry;
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var i;
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if (geom) {
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switch (geom.type) {
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case 'LineString':
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this._addGeoJSONData(geom.coordinates);
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break;
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case 'MultiLineString':
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for (i = 0; i < geom.coordinates.length; i++) {
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this._addGeoJSONData(geom.coordinates[i]);
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}
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break;
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default:
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throw new Error('Invalid GeoJSON object.');
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}
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}
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var feat = d && d.type === "FeatureCollection";
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if (feat) {
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for (i = 0; i < d.features.length; i++) {
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this._addData(d.features[i]);
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}
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}
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if (d && d._latlngs) {
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this._addGPXdata(d._latlngs);
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}
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},
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/*
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* Add data to the diagram either from GPX or GeoJSON and
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* update the axis domain and data
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*/
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addData: function(d) {
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this._addData(d);
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var xdomain = d3.extent(this._data, function(d) {
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return d.dist;
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});
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var ydomain = d3.extent(this._data, function(d) {
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return d.altitude;
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});
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this._x.domain(xdomain);
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this._y.domain(ydomain);
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this._areapath.datum(this._data)
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.attr("d", this._area);
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this._updateAxis();
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return;
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}
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});
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L.control.elevation = function(options) {
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return new L.Control.Elevation(options);
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}; |