/* Copyright (c) 2009 Arnaud Renevier, Inc, published under the modified BSD * license. */ /* * With canvas rendering engine, externalgraphics are drawn by loading and * Image javascript object and drawing it with drawImage once it has been * loaded. If matching feature is deleted while image is loading, redraw * function will be called before drawImage and therefore, feature is removed, * but image is still drawn on the screen. We fix it with locks: when an image is * loading, we defer redraw method. */ OpenLayers.Renderer.Canvas.prototype = OpenLayers.Util.extend({ needsRedraw: false, imagesLoading: 0 }, OpenLayers.Renderer.Canvas.prototype); OpenLayers.Renderer.Canvas.prototype.oldRedraw = OpenLayers.Renderer.Canvas.prototype.redraw; OpenLayers.Renderer.Canvas.prototype.redraw = function() { if (this.imagesLoading > 0) { this.needsRedraw = true; return; } OpenLayers.Renderer.Canvas.prototype.oldRedraw.apply(this, arguments); } OpenLayers.Renderer.Canvas.prototype.drawExternalGraphic = function(pt, style) { var img = new Image(); img.src = style.externalGraphic; if(style.graphicTitle) { img.title=style.graphicTitle; } var width = style.graphicWidth || style.graphicHeight; var height = style.graphicHeight || style.graphicWidth; width = width ? width : style.pointRadius*2; height = height ? height : style.pointRadius*2; var xOffset = (style.graphicXOffset != undefined) ? style.graphicXOffset : -(0.5 * width); var yOffset = (style.graphicYOffset != undefined) ? style.graphicYOffset : -(0.5 * height); var opacity = style.graphicOpacity || style.fillOpacity; var context = { img: img, x: (pt[0]+xOffset), y: (pt[1]+yOffset), width: width, height: height, canvas: this.canvas }; var self = this; this.imagesLoading++; img.onerror = function() { self.imagesLoading--; if ((self.imagesLoading == 0) && (self.needsRedraw)) { self.needsRedraw = false; self.redraw(); } } img.onload = OpenLayers.Function.bind( function() { self.imagesLoading--; if ((self.imagesLoading == 0) && (self.needsRedraw)) { self.needsRedraw = false; self.redraw(); } else { this.canvas.drawImage(this.img, this.x, this.y, this.width, this.height); } }, context); } OpenLayers.Control.SypAttribution = OpenLayers.Class (OpenLayers.Control.Attribution, { updateAttribution: function() { var attributions = [SypStrings.poweredByLink]; if (this.map && this.map.layers) { for(var i=0, len=this.map.layers.length; i 1) ? feature.attributes.count: ""; } } }); var selectStyle = new OpenLayers.Style({ externalGraphic: this.Markers.SELECT_ICON, graphicHeight: this.Markers.HEIGHT || 32 }); var styleMap = new OpenLayers.StyleMap ( {"default": defaultStyle, "select": selectStyle}); var layer = new OpenLayers.Layer.GML("KML", "items.php", { strategies: [ new OpenLayers.Strategy.Cluster() ], styleMap: styleMap, format: OpenLayers.Format.KML, projection: this.map.displayProjection, eventListeners: { scope: this, loadend: this.dataLayerEndLoad } }); return layer; }, createSelectControl: function() { var control = new OpenLayers.Control.SelectFeature( this.dataLayer, { onSelect: this.onFeatureSelect, onUnselect: this.onFeatureUnselect, toggle: true, clickout: false }); return control; }, dataLayerEndLoad: function() { if (!this.checkForFeatures()) { return; } var map = this.map; if (map.getControlsByClass("OpenLayers.Control.ArgParser")[0].center == null) { // map center was not set in ArgParser control. var orig = this.Utils.mbr (this.dataLayer); var centerBounds = new OpenLayers.Bounds(); var mapProj = map.getProjectionObject(); var sypOrigProj = new OpenLayers.Projection("EPSG:4326"); var bottomLeft = new OpenLayers.LonLat(orig[0],orig[1]); bottomLeft = bottomLeft.transform(sypOrigProj, mapProj); var topRight = new OpenLayers.LonLat(orig[2],orig[3]) topRight = topRight.transform(sypOrigProj, mapProj); centerBounds.extend(bottomLeft); centerBounds.extend(topRight); map.zoomToExtent(centerBounds); } }, checkForFeatures: function() { var features = this.dataLayer.features; if (features.length == 0) { var message = SypStrings.noImageRegistered; this.Utils.displayUserMessage(message, "warn"); } return !!features.length; }, createPopup: function(position, contentHTML) { var popup = new OpenLayers.Popup.Anchored("popup", position, null, contentHTML, null, true); popup.autoSize = true; popup.backgroundColor = ""; // deal with it in css popup.border = ""; // deal with it in css popup.closeOnMove = true; return popup; }, onFeatureUnselect: function (feature) { var map = feature.layer.map; var permaControl = map.getControlsByClass("OpenLayers.Control.Permalink"); if (permaControl[0]) { permaControl[0].div.style.display = ""; } if (!feature.popup) { this.map.events.unregister("movestart", this, this._unselect); return; } var popup = feature.popup; if (popup.visible()) { popup.hide(); } }, onZoomClusterEnd: function(arg) { var map = arg.object; var point = new OpenLayers.Geometry.Point(this.lonlat.lon, this.lonlat.lat); var center = map.getCenter(); for (var i = this.layer.features.length; i-->0;) { var feature = this.layer.features[i]; if (feature.geometry.equals(point) && (feature.attributes.count == this.count)) { var self = this; window.setTimeout(function() { map.setCenter(self.lonlat, map.zoom + 1)}, 500); return; } } SYP.selectControl.activate(); map.events.unregister("zoomend", this, SYP.onZoomClusterEnd); }, onFeatureSelect: function(feature) { var map = feature.layer.map; if (feature.attributes.count > 1) { this.unselect(feature); var lonlat = new OpenLayers.LonLat(feature.geometry.x, feature.geometry.y); var args = { lonlat: lonlat, layer: feature.layer, count: feature.attributes.count } map.events.register("zoomend", args, SYP.onZoomClusterEnd); SYP.selectControl.deactivate(); map.setCenter(lonlat, map.zoom + 1); return; } var permaControl = map.getControlsByClass("OpenLayers.Control.Permalink"); if (permaControl[0]) { permaControl[0].div.style.display = "none"; } var popup = feature.popup; var popupPos = null; switch (sypSettings.popupPos) { case 0: popupPos = feature.geometry.getBounds().getCenterLonLat(); break; case 1: popupPos = SYP.Utils.tlCorner(map, 8); break; case 2: popupPos = SYP.Utils.trCorner(map, 8); break; case 3: popupPos = SYP.Utils.brCorner(map, 8); break; case 4: popupPos = SYP.Utils.blCorner(map, 8); break; default: popupPos = SYP.Utils.brCorner(map, 8); break; } // we cannot reuse popup; we need to recreate it in order for IE // expressions to work. Otherwise, we get a 0x0 image on second view. if (popup) { popup.destroy(); } var contentHTML; if (feature.cluster[0].attributes.name) { // escaping name is necessary because it's not enclosed in another html tag. contentHTML = "

" + SYP.Utils.escapeHTML(feature.cluster[0].attributes.name) + "

" + feature.cluster[0].attributes.description; } else { contentHTML = feature.cluster[0].attributes.description; } if (!contentHTML || !contentHTML.length) { this.map.events.register("movestart", this, this._unselect = function () { this.unselect(feature)}); return; } popup = SYP.createPopup(popupPos, contentHTML); var control = this; popup.hide = function () { OpenLayers.Element.hide(this.div); control.unselectAll(); }; map.addPopup(popup); feature.popup = popup; var anchor = popup.div.getElementsByTagName("a")[0]; if (anchor) { anchor.onclick = function() { SYP.showBigImage(this.href); return false; } } }, showBigImage: function (href) { if (OpenLayers.Util.getBrowserName() == "msie") { document.getElementById('bigimg_container').style.display = "block"; } else { document.getElementById('bigimg_container').style.display = "table"; } var maxHeight = document.body.clientHeight * 0.9; var maxWidth = document.body.clientWidth * 0.9; document.getElementById('bigimg').style.height = ""; document.getElementById('bigimg').style.width = ""; document.getElementById('bigimg').style.maxHeight = maxHeight + "px"; document.getElementById('bigimg').style.maxWidth = maxWidth + "px"; document.getElementById('bigimg').onload = function () { var heightRatio = this.clientHeight / parseInt(this.style.maxHeight); var widthRatio = this.clientWidth / parseInt(this.style.maxWidth); if (heightRatio > 1 || widthRatio > 1) { if (heightRatio > widthRatio) { this.style.height = this.style.maxHeight; } else { this.style.width = this.style.maxWidth; } } var offsetTop = this.offsetTop; var offsetLeft = this.offsetLeft; var par = this.offsetParent; var ismsie = OpenLayers.Util.getBrowserName() == "msie"; while (par && !ismsie) { offsetTop += par.offsetTop; offsetLeft += par.offsetLeft; par = par.offsetParent; } var icon = document.getElementById('bigimg_close'); icon.style.top = offsetTop; icon.style.left = offsetLeft + this.clientWidth - icon.clientWidth; }; document.getElementById('bigimg').src = href; }, closeBigImage: function() { document.getElementById('bigimg').src = ""; document.getElementById('bigimg').parentNode.innerHTML = document.getElementById('bigimg').parentNode.innerHTML; document.getElementById('bigimg_container').style.display = "none"; }, Utils: { tlCorner: function(map, margin) { var bounds = map.calculateBounds(); var corner = new OpenLayers.LonLat(bounds.left, bounds.top); var cornerAsPx = map.getPixelFromLonLat(corner); cornerAsPx = cornerAsPx.add( +margin, +margin); return map.getLonLatFromPixel(cornerAsPx); }, trCorner: function(map, margin) { var bounds = map.calculateBounds(); var corner = new OpenLayers.LonLat(bounds.right, bounds.top); var cornerAsPx = map.getPixelFromLonLat(corner); cornerAsPx = cornerAsPx.add( -margin, +margin); return map.getLonLatFromPixel(cornerAsPx); }, brCorner: function(map, margin) { var bounds = map.calculateBounds(); var corner = new OpenLayers.LonLat(bounds.right, bounds.bottom); var cornerAsPx = map.getPixelFromLonLat(corner); cornerAsPx = cornerAsPx.add( -margin, -margin); return map.getLonLatFromPixel(cornerAsPx); }, blCorner: function(map, margin) { var bounds = map.calculateBounds(); var corner = new OpenLayers.LonLat(bounds.left, bounds.bottom); var cornerAsPx = map.getPixelFromLonLat(corner); cornerAsPx = cornerAsPx.add( +margin, -margin); return map.getLonLatFromPixel(cornerAsPx); }, /* minimum bounds rectangle containing all feature locations. * FIXME: if two features are close, but separated by 180th meridian, * their mbr will span the whole earth. Actually, 179° lon and -170° * lon are considerated very near. */ mbr: function (layer) { var features = []; var map = layer.map; var mapProj = map.getProjectionObject(); var sypOrigProj = new OpenLayers.Projection("EPSG:4326"); for (var i =0; i < layer.features.length; i++) { if (layer.features[i].cluster) { features = features.concat(layer.features[i].cluster); } else { features = features.concat(layer.features); } } var minlon = 180; var minlat = 88; var maxlon = -180; var maxlat = -88; if (features.length == 0) { // keep default values } else if (features.length == 1) { // in case there's only one feature, we show an area of at least // 4 x 4 degrees var pos = features[0].geometry.getBounds().getCenterLonLat().clone(); var lonlat = pos.transform(mapProj, sypOrigProj); minlon = Math.max (lonlat.lon - 2, -180); maxlon = Math.min (lonlat.lon + 2, 180); minlat = Math.max (lonlat.lat - 2, -90); maxlat = Math.min (lonlat.lat + 2, 90); } else { for (var i = 0; i < features.length; i++) { var pos = features[i].geometry.getBounds().getCenterLonLat().clone(); var lonlat = pos.transform(mapProj, sypOrigProj); minlon = Math.min (lonlat.lon, minlon); minlat = Math.min (lonlat.lat, minlat); maxlon = Math.max (lonlat.lon, maxlon); maxlat = Math.max (lonlat.lat, maxlat); } } return [minlon, minlat, maxlon, maxlat]; }, displayUserMessage: function(message, status) { var div = document.getElementById('message'); while (div.firstChild) div.removeChild(div.firstChild); var textNode = document.createTextNode(message); switch (status) { case "error": div.style.color = "red"; break; case "warn": div.style.color = "#FF8C00"; break; case "success": div.style.color = "green"; break; default: div.style.color = "black"; break; } div.style.display = "block"; div.appendChild(textNode); }, escapeHTML: function (str) { if (!str) { return ""; } return str. replace(/&/gm, '&'). replace(/'/gm, '''). replace(/"/gm, '"'). replace(/>/gm, '>'). replace(/" + self.contentDiv.innerHTML + ""; var containerElement = (self.map) ? self.map.layerContainerDiv : document.body; var realSize = OpenLayers.Util.getRenderedDimensions( preparedHTML, null, { displayClass: self.displayClass, containerElement: containerElement } ); /* * XXX: next four lines are added by SYP! */ if (self.contentDiv) { realSize.w = Math.max (realSize.w, self.contentDiv.scrollWidth); realSize.h = Math.max (realSize.h, self.contentDiv.scrollHeight); } // is the "real" size of the div is safe to display in our map? var safeSize = self.getSafeContentSize(realSize); var newSize = null; if (safeSize.equals(realSize)) { //real size of content is small enough to fit on the map, // so we use real size. newSize = realSize; } else { //make a new OL.Size object with the clipped dimensions // set or null if not clipped. var fixedSize = new OpenLayers.Size(); fixedSize.w = (safeSize.w < realSize.w) ? safeSize.w : null; fixedSize.h = (safeSize.h < realSize.h) ? safeSize.h : null; if (fixedSize.w && fixedSize.h) { //content is too big in both directions, so we will use // max popup size (safeSize), knowing well that it will // overflow both ways. newSize = safeSize; } else { //content is clipped in only one direction, so we need to // run getRenderedDimensions() again with a fixed dimension var clippedSize = OpenLayers.Util.getRenderedDimensions( preparedHTML, fixedSize, { displayClass: self.contentDisplayClass, containerElement: containerElement } ); //if the clipped size is still the same as the safeSize, // that means that our content must be fixed in the // offending direction. If overflow is 'auto', this means // we are going to have a scrollbar for sure, so we must // adjust for that. // var currentOverflow = OpenLayers.Element.getStyle( self.contentDiv, "overflow" ); if ( (currentOverflow != "hidden") && (clippedSize.equals(safeSize)) ) { var scrollBar = OpenLayers.Util.getScrollbarWidth(); if (fixedSize.w) { clippedSize.h += scrollBar; } else { clippedSize.w += scrollBar; } } newSize = self.getSafeContentSize(clippedSize); } } self.setSize(newSize); }, 0); }