675 lines
No EOL
20 KiB
JavaScript
675 lines
No EOL
20 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: 60
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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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yAxisMin: undefined,
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yAxisMax: undefined,
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forceAxisBounds: false
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},
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onRemove: function(map) {
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this._container = 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.xTicks = opts.xTicks || Math.round(this._width() / 75);
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opts.yTicks = opts.yTicks || Math.round(this._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, this._width()]);
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var y = this._y = d3.scale.linear()
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.range([this._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(this._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 cont = d3.select(container);
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cont.attr("width", opts.width);
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var svg = cont.append("svg");
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svg.attr("width", opts.width)
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.attr("class", "background")
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.attr("height", opts.height)
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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 this._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", this._width())
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.attr("height", this._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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if (L.Browser.touch) {
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background.on("touchmove.drag", this._dragHandler.bind(this)).
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on("touchstart.drag", this._dragStartHandler.bind(this)).
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on("touchstart.focus", this._mousemoveHandler.bind(this));
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L.DomEvent.on(this._container, 'touchend', this._dragEndHandler, this);
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} else {
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background.on("mousemove.focus", this._mousemoveHandler.bind(this)).
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on("mouseout.focus", this._mouseoutHandler.bind(this)).
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on("mousedown.drag", this._dragStartHandler.bind(this)).
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on("mousemove.drag", this._dragHandler.bind(this));
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L.DomEvent.on(this._container, 'mouseup', this._dragEndHandler, this);
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}
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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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if (this._data) {
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this._applyData();
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}
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return container;
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},
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_dragHandler: function() {
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//we don´t want map events to occur here
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d3.event.preventDefault();
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d3.event.stopPropagation();
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this._gotDragged = true;
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this._drawDragRectangle();
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},
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/*
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* Draws the currently dragged rectabgle over the chart.
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*/
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_drawDragRectangle: function() {
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if (!this._dragStartCoords) {
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return;
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}
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var dragEndCoords = this._dragCurrentCoords = d3.mouse(this._background.node());
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var x1 = Math.min(this._dragStartCoords[0], dragEndCoords[0]),
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x2 = Math.max(this._dragStartCoords[0], dragEndCoords[0]);
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if (!this._dragRectangle && !this._dragRectangleG) {
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var g = d3.select(this._container).select("svg").select("g");
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this._dragRectangleG = g.append("g");
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this._dragRectangle = this._dragRectangleG.append("rect")
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.attr("width", x2 - x1)
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.attr("height", this._height())
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.attr("x", x1)
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.attr('class', 'mouse-drag')
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.style("pointer-events", "none");
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} else {
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this._dragRectangle.attr("width", x2 - x1)
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.attr("x", x1);
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}
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},
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/*
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* Removes the drag rectangle and zoms back to the total extent of the data.
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*/
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_resetDrag: function() {
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if (this._dragRectangleG) {
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this._dragRectangleG.remove();
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this._dragRectangleG = null;
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this._dragRectangle = null;
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this._hidePositionMarker();
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this._map.fitBounds(this._fullExtent);
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}
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},
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/*
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* Handles end of dragg operations. Zooms the map to the selected items extent.
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*/
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_dragEndHandler: function() {
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if (!this._dragStartCoords || !this._gotDragged) {
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this._dragStartCoords = null;
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this._gotDragged = false;
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this._resetDrag();
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return;
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}
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this._hidePositionMarker();
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var item1 = this._findItemForX(this._dragStartCoords[0]),
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item2 = this._findItemForX(this._dragCurrentCoords[0]);
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this._fitSection(item1, item2);
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this._dragStartCoords = null;
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this._gotDragged = false;
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},
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_dragStartHandler: function() {
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d3.event.preventDefault();
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d3.event.stopPropagation();
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this._gotDragged = false;
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this._dragStartCoords = d3.mouse(this._background.node());
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},
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/*
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* Finds a data entry for a given x-coordinate of the diagram
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*/
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_findItemForX: function(x) {
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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(x);
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return bisect(this._data, xinvert);
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},
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/** Make the map fit the route section between given indexes. */
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_fitSection: function(index1, index2) {
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var start = Math.min(index1, index2),
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end = Math.max(index1, index2);
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var ext = this._calculateFullExtent(this._data.slice(start, end));
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this._map.fitBounds(ext);
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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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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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} 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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_width: function() {
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var opts = this.options;
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return opts.width - opts.margins.left - opts.margins.right;
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},
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_height: function() {
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var opts = this.options;
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return opts.height - opts.margins.top - opts.margins.bottom;
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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", -45)
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.attr("y", 3)
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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._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._width() + 20)
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.attr("y", 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("g").remove();
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this._xaxisgraphicnode.selectAll("path").remove();
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this._xaxisgraphicnode.selectAll("text").remove();
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this._yaxisgraphicnode.selectAll("g").remove();
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this._yaxisgraphicnode.selectAll("path").remove();
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this._yaxisgraphicnode.selectAll("text").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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this._hidePositionMarker();
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},
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/*
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* Hides the position-/heigth indication marker drawn onto the map
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*/
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_hidePositionMarker: 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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/*
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* Handles the moueseover the chart and displays distance and altitude level
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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', this._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 item = this._data[this._findItemForX(coords[0])],
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alt = item.altitude,
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dist = item.dist,
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ll = 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", this._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._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 + Math.round(newdist / 1000 * 100000) / 100000;
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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 + Math.round(newdist / 1000 * 100000) / 100000;
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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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}
|
||
this._dist = dist;
|
||
this._data = data;
|
||
this._maxElevation = ele;
|
||
}
|
||
},
|
||
|
||
_addData: function(d) {
|
||
var geom = d && d.geometry && d.geometry;
|
||
var i;
|
||
|
||
if (geom) {
|
||
switch (geom.type) {
|
||
case 'LineString':
|
||
this._addGeoJSONData(geom.coordinates);
|
||
break;
|
||
|
||
case 'MultiLineString':
|
||
for (i = 0; i < geom.coordinates.length; i++) {
|
||
this._addGeoJSONData(geom.coordinates[i]);
|
||
}
|
||
break;
|
||
|
||
default:
|
||
throw new Error('Invalid GeoJSON object.');
|
||
}
|
||
}
|
||
|
||
var feat = d && d.type === "FeatureCollection";
|
||
if (feat) {
|
||
for (i = 0; i < d.features.length; i++) {
|
||
this._addData(d.features[i]);
|
||
}
|
||
}
|
||
|
||
if (d && d._latlngs) {
|
||
this._addGPXdata(d._latlngs);
|
||
}
|
||
},
|
||
|
||
/*
|
||
* Calculates the full extent of the data array
|
||
*/
|
||
_calculateFullExtent: function(data) {
|
||
|
||
if (!data || data.length < 1) {
|
||
throw new Error("no data in parameters");
|
||
}
|
||
|
||
var ext = new L.latLngBounds(data[0].latlng, data[0].latlng);
|
||
|
||
data.forEach(function(item) {
|
||
ext.extend(item.latlng);
|
||
});
|
||
|
||
return ext;
|
||
|
||
},
|
||
|
||
/*
|
||
* Add data to the diagram either from GPX or GeoJSON and
|
||
* update the axis domain and data
|
||
*/
|
||
addData: function(d) {
|
||
this._addData(d);
|
||
if (this._container) {
|
||
this._applyData();
|
||
}
|
||
},
|
||
|
||
_applyData: function() {
|
||
var xdomain = d3.extent(this._data, function(d) {
|
||
return d.dist;
|
||
});
|
||
var ydomain = d3.extent(this._data, function(d) {
|
||
return d.altitude;
|
||
});
|
||
var opts = this.options;
|
||
|
||
if (opts.yAxisMin !== undefined && (opts.yAxisMin < ydomain[0] || opts.forceAxisBounds)) {
|
||
ydomain[0] = opts.yAxisMin;
|
||
}
|
||
if (opts.yAxisMax !== undefined && (opts.yAxisMax > ydomain[1] || opts.forceAxisBounds)) {
|
||
ydomain[1] = opts.yAxisMax;
|
||
}
|
||
|
||
this._x.domain(xdomain);
|
||
this._y.domain(ydomain);
|
||
this._areapath.datum(this._data)
|
||
.attr("d", this._area);
|
||
this._updateAxis();
|
||
|
||
this._fullExtent = this._calculateFullExtent(this._data);
|
||
},
|
||
|
||
/*
|
||
* Reset data
|
||
*/
|
||
_clearData: function() {
|
||
this._data = null;
|
||
this._dist = null;
|
||
this._maxElevation = null;
|
||
},
|
||
|
||
/*
|
||
* Reset data and display
|
||
*/
|
||
clear: function() {
|
||
|
||
this._clearData();
|
||
|
||
if (!this._areapath) {
|
||
return;
|
||
}
|
||
|
||
// workaround for 'Error: Problem parsing d=""' in Webkit when empty data
|
||
// https://groups.google.com/d/msg/d3-js/7rFxpXKXFhI/HzIO_NPeDuMJ
|
||
//this._areapath.datum(this._data).attr("d", this._area);
|
||
this._areapath.attr("d", "M0 0");
|
||
|
||
this._x.domain([0, 1]);
|
||
this._y.domain([0, 1]);
|
||
this._updateAxis();
|
||
}
|
||
|
||
});
|
||
|
||
L.control.elevation = function(options) {
|
||
return new L.Control.Elevation(options);
|
||
}; |