7e8605bf0d
also reported on the users mailing list. The problem appears to be that Firefox has poor support for circles of very small radius -- below about .0002. Since units were in geographic units, this just didn't work so well. So: * Change coordinate space to be pixel based. * Make all x/y operations divided by resolution * add getComponentsString, getShortString helpers * Redraw nodes totally on every 'reprojectNode' call git-svn-id: http://svn.openlayers.org/trunk/openlayers@2960 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
349 lines
10 KiB
JavaScript
349 lines
10 KiB
JavaScript
/* Copyright (c) 2006 MetaCarta, Inc., published under a modified BSD license.
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* See http://svn.openlayers.org/trunk/openlayers/repository-license.txt
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* for the full text of the license. */
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/**
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* @class
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*
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* @requires OpenLayers/Renderer/Elements.js
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*/
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OpenLayers.Renderer.SVG = OpenLayers.Class.create();
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OpenLayers.Renderer.SVG.prototype =
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OpenLayers.Class.inherit(OpenLayers.Renderer.Elements, {
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/** @type String */
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xmlns: "http://www.w3.org/2000/svg",
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/**
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* @constructor
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*
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* @param {String} containerID
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*/
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initialize: function(containerID) {
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if (!this.supported()) {
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return;
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}
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OpenLayers.Renderer.Elements.prototype.initialize.apply(this,
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arguments);
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},
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/**
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*
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*/
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destroy: function() {
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OpenLayers.Renderer.Elements.prototype.destroy.apply(this, arguments);
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},
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/**
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* @returns Whether or not the browser supports the VML renderer
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* @type Boolean
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*/
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supported: function() {
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var svgFeature = "http://www.w3.org/TR/SVG11/feature#SVG";
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var supported = (document.implementation.hasFeature("org.w3c.svg", "1.0") || document.implementation.hasFeature(svgFeature, "1.1"));
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return supported;
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},
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/**
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* @param {OpenLayers.Bounds} extent
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*/
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setExtent: function(extent) {
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OpenLayers.Renderer.Elements.prototype.setExtent.apply(this,
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arguments);
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var resolution = this.getResolution();
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var extentString = extent.left / resolution + " " + -extent.top / resolution + " " +
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extent.getWidth() / resolution + " " + extent.getHeight() / resolution;
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this.rendererRoot.setAttributeNS(null, "viewBox", extentString);
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},
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/**
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* function
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*
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* sets the size of the drawing surface
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*
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* @param size {OpenLayers.Size} the size of the drawing surface
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*/
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setSize: function(size) {
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OpenLayers.Renderer.prototype.setSize.apply(this, arguments);
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this.rendererRoot.setAttributeNS(null, "width", this.size.w);
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this.rendererRoot.setAttributeNS(null, "height", this.size.h);
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},
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/**
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* @param geometry {OpenLayers.Geometry}
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*
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* @returns The corresponding node type for the specified geometry
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* @type String
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*/
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getNodeType: function(geometry) {
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var nodeType = null;
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switch (geometry.CLASS_NAME) {
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case "OpenLayers.Geometry.Point":
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nodeType = "circle";
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break;
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case "OpenLayers.Geometry.Rectangle":
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nodeType = "rect";
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break;
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case "OpenLayers.Geometry.LineString":
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nodeType = "polyline";
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break;
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case "OpenLayers.Geometry.LinearRing":
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nodeType = "polygon";
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break;
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case "OpenLayers.Geometry.Polygon":
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case "OpenLayers.Geometry.Curve":
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case "OpenLayers.Geometry.Surface":
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nodeType = "path";
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break;
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default:
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break;
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}
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return nodeType;
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},
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/**
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* @param {DOMElement} node
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*/
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reprojectNode: function(node) {
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this.drawGeometryNode(node);
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},
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/**
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* Use to set all the style attributes to a SVG node.
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*
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* Note: takes care to adjust stroke width and point radius
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* to be resolution-relative
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*
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* @param node {SVGDomElement} an SVG element to decorate
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* @param {Object} style
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* @param {Object} options
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* @option isFilled {boolean}
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* @option isStroked {boolean}
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*/
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setStyle: function(node, style, options) {
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style = style || node.olStyle;
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options = options || node.olOptions;
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if (node.geometry.CLASS_NAME == "OpenLayers.Geometry.Point") {
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node.setAttributeNS(null, "r", style.pointRadius);
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}
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if (options.isFilled) {
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node.setAttributeNS(null, "fill", style.fillColor);
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node.setAttributeNS(null, "fill-opacity", style.fillOpacity);
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} else {
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node.setAttributeNS(null, "fill", "none");
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}
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if (options.isStroked) {
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node.setAttributeNS(null, "stroke", style.strokeColor);
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node.setAttributeNS(null, "stroke-opacity", style.strokeOpacity);
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node.setAttributeNS(null, "stroke-width", style.strokeWidth);
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} else {
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node.setAttributeNS(null, "stroke", "none");
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}
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if (style.pointerEvents) {
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node.setAttributeNS(null, "pointer-events", style.pointerEvents);
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}
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},
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/**
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* @private
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*
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* @param {String} type Kind of node to draw
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* @param {String} id Id for node
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*
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* @returns A new node of the given type and id
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* @type DOMElement
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*/
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createNode: function(type, id) {
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var node = document.createElementNS(this.xmlns, type);
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if (id) {
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node.setAttributeNS(null, "id", id);
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}
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return node;
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},
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/**
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* @private
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*
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* @param {String} type Kind of node to draw
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* @param {String} id Id for node
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*
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* @returns Whether or not the specified node is of the specified type
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* @type Boolean
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*/
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nodeTypeCompare: function(node, type) {
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return (type == node.nodeName);
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},
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/**
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* @returns The specific render engine's root element
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* @type DOMElement
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*/
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createRenderRoot: function() {
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var id = this.container.id + "_svgRoot";
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var rendererRoot = this.nodeFactory(id, "svg");
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return rendererRoot;
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},
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/**
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* @returns The main root element to which we'll add vectors
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* @type DOMElement
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*/
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createRoot: function() {
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var id = this.container.id + "_root";
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var root = this.nodeFactory(id, "g");
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// flip the SVG display Y axis upside down so it
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// matches the display Y axis of the map
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root.setAttributeNS(null, "transform", "scale(1, -1)");
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return root;
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},
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/**************************************
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* *
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* GEOMETRY DRAWING FUNCTIONS *
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* *
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**************************************/
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/**
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* @param {DOMElement} node
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* @param {OpenLayers.Geometry} geometry
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*/
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drawPoint: function(node, geometry) {
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this.drawCircle(node, geometry, 1);
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},
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/**
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* @param {DOMElement} node
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* @param {OpenLayers.Geometry} geometry
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* @param {float} radius
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*/
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drawCircle: function(node, geometry, radius) {
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var resolution = this.getResolution();
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node.setAttributeNS(null, "cx", geometry.x / resolution);
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node.setAttributeNS(null, "cy", geometry.y / resolution);
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node.setAttributeNS(null, "r", radius);
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},
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/**
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* @param {DOMElement} node
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* @param {OpenLayers.Geometry} geometry
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*/
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drawLineString: function(node, geometry) {
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node.setAttributeNS(null, "points", this.getComponentsString(geometry.components));
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},
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/**
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* @param {DOMElement} node
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* @param {OpenLayers.Geometry} geometry
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*/
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drawLinearRing: function(node, geometry) {
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node.setAttributeNS(null, "points", this.getComponentsString(geometry.components));
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},
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/**
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* @param {DOMElement} node
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* @param {OpenLayers.Geometry} geometry
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*/
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drawPolygon: function(node, geometry) {
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var d = "";
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for (var j = 0; j < geometry.components.length; j++) {
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var linearRing = geometry.components[j];
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d += " M";
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for (var i = 0; i < linearRing.components.length; i++) {
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d += " " + this.getShortString(linearRing.components[i]);
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}
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}
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d += " z";
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node.setAttributeNS(null, "d", d);
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node.setAttributeNS(null, "fill-rule", "evenodd");
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},
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/**
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* @param {DOMElement} node
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* @param {OpenLayers.Geometry} geometry
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*/
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drawRectangle: function(node, geometry) {
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node.setAttributeNS(null, "x", geometry.x / resolution);
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node.setAttributeNS(null, "y", geometry.y / resolution);
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node.setAttributeNS(null, "width", geometry.width);
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node.setAttributeNS(null, "height", geometry.height);
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},
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/**
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* @param {DOMElement} node
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* @param {OpenLayers.Geometry} geometry
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*/
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drawCurve: function(node, geometry) {
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var d = null;
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for (var i = 0; i < geometry.components.length; i++) {
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if ((i%3) == 0 && (i/3) == 0) {
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d = "M " + this.getShortString(geometry.components[i]);
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} else if ((i%3) == 1) {
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d += " C " + this.getShortString(geometry.components[i]);
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} else {
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d += " " + this.getShortString(geometry.components[i]);
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}
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}
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node.setAttributeNS(null, "d", d);
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},
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/**
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* @param {DOMElement} node
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* @param {OpenLayers.Geometry} geometry
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*/
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drawSurface: function(node, geometry) {
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// create the svg path string representation
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var d = null;
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for (var i = 0; i < geometry.components.length; i++) {
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if ((i%3) == 0 && (i/3) == 0) {
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d = "M " + this.getShortString(geometry.components[i]);
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} else if ((i%3) == 1) {
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d += " C " + this.getShortString(geometry.components[i]);
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} else {
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d += " " + this.getShortString(geometry.components[i]);
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}
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}
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d += " Z";
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node.setAttributeNS(null, "d", d);
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},
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/**
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* @param {Array} components array of points
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*/
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getComponentsString: function(components) {
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var strings = [];
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for(var i = 0; i < components.length; i++) {
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strings.push(this.getShortString(components[i]));
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}
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return strings.join(",");
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},
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/**
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* @param {OpenLayers.Geometry.Point} point
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*/
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getShortString: function(point) {
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var resolution = this.getResolution();
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return point.x / resolution + "," + point.y / resolution;
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},
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/** @final @type String */
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CLASS_NAME: "OpenLayers.Renderer.SVG"
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});
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