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R/symbolGoogleMaps.R
In plotGoogleMaps: Plot Spatial or Spatio-Temporal Data Over Google Maps
## Modified plotGoogleMaps to use Google symbols as markers
## DC 6/3/2015 Initial version uses circles for SpatialPointsDataFrames only
symbolGoogleMaps <-
function(SP,
filename="",
zcol=1,
add=FALSE,
previousMap=NULL,
symbolPath="google.maps.SymbolPath.CIRCLE",
minScale=5,
zcolIndexBase=mean(sqrt(SP@data[,zcol]/pi)*2,na.rm = TRUE),
symbolFillColor="red",
symbolFillOpacity=0.7,
strokeColor="white",
strokeOpacity=1,
strokeWeight=1,
clickable=TRUE,
draggableMarker=FALSE,
flat=TRUE,
visible=TRUE,
zIndex="null",
map.width="100%",
map.height="100%",
layerName="",
layerNameEnabled=TRUE,
layerGroupName=FALSE,
control.width="100%",
control.height="100%",
zoom=15,
fitBounds=TRUE,
mapTypeId = "HYBRID",
disableDoubleClickZoom =FALSE,
draggable= TRUE ,
keyboardShortcuts=TRUE,
mapTypeControlOptions='DEFAULT',
navigationControl=TRUE,
navigationControlOptions='DEFAULT',
scaleControlOptions= 'STANDARD',
noClear=FALSE,
scrollwheel =TRUE ,
streetViewControl= FALSE,
control=TRUE,
InfoWindowControl=list(map=map, event="click",position="event.latLng",
disableAutoPan=FALSE, maxWidth=330,pixelOffset="null",
zIndex="null") ,
funcSetInfoWindowText=NULL,
funcSetMarkerTitleText=NULL,
map="map",
mapCanvas="map_canvas",
css = "",
api="https://maps.googleapis.com/maps/api/js?libraries=visualization",
openMap= TRUE,
trafficLayerEnabled = NULL,
trafficLayerName = "Traffic",
transitLayerEnabled = NULL,
transitLayerName = "Transit",
bicycleLayerEnabled = NULL,
bicycleLayerName = "Bicycle",
...) {
###############################################################################
############################### symbolGoogleMaps ##############################
###############################################################################
# wd=getwd()
## Check new arguments
if(!is.logical(layerNameEnabled)) {
warning("layerNameEnabled must be TRUE to show map layer on map load or FALSE to hide map layer. Using default of TRUE")
layerNameEnabled <- TRUE
}
if(!is.null(funcSetInfoWindowText) && !is.function(funcSetInfoWindowText)) {
warning("funcSetInfoWindowText must be NULL or a function that accepts a sp object and returns a character vector of InfoWindow marker strings. Using defaults.")
funcSetInfoWindowText <- NULL
}
if(!is.null(funcSetMarkerTitleText) && !is.function(funcSetMarkerTitleText)) {
warning("funcSetMarkerTitleText must be NULL or a function that accepts a sp object and returns a character vector of marker title strings. Using defaults.")
funcSetMarkerTitleText <- NULL
}
if(is.logical(layerGroupName) && layerGroupName || !is.logical(layerGroupName) && !is.character(layerGroupName)) {
warning("layerGroupName must be FALSE or a character string to use as the group name for this layer")
}
nameOfSP <- sapply(as.list(substitute({SP})[-1]), deparse)
nameOfSP <- gsub("\\s","", nameOfSP)
nameOfSP <- gsub('[!,",#,$,%,&,(,),*,+,-,.,/,:,;,<,=,>,?,@,_,^,`,|,~]', "x", nameOfSP)
nameOfSP <- gsub('[[]', "X", nameOfSP)
nameOfSP <- gsub('[]]', "X", nameOfSP)
temporary <- FALSE
## 6/26/2015: Only use temporary folder (vs. current working directory) if filename is "" AND add is FALSE
if(filename=="" && !add){
filename <- tempfile("map", fileext = c(".html"))
temporary <- TRUE
}
if(class(SP)[1]=="RasterLayer") {
SP <- projectRaster( SP , crs=CRS("+proj=longlat +datum=WGS84"))
SP <- as(SP , 'SpatialGridDataFrame')
SP.ll <- SP
}
if ((class(SP)[1]=="SpatialPixelsDataFrame" || class(SP)[1]=="SpatialGridDataFrame" ) ) {
r <- raster(SP, layer=zcol)
SP <- projectRaster( r , crs=CRS("+proj=longlat +datum=WGS84"))
SP <- as(SP , 'SpatialGridDataFrame')
SP.ll <- SP
} else {
SP.ll <- spTransform(SP, CRS("+proj=longlat +datum=WGS84"))
## If SP was already in the required projection, use the original SP to preserve @bbox settings
## spTranform() will reset @bbox to show entire object
if(identicalCRS(SP,SP.ll)) {
SP.ll <- SP
}
}
disableDefaultUI <- FALSE
Centar <- c(mean(SP.ll@bbox[1,]),mean(SP.ll@bbox[2,]))
sw <- c(SP.ll@bbox[2,1],SP.ll@bbox[1,1])
ne <- c(SP.ll@bbox[2,2],SP.ll@bbox[1,2])
if(any('data'==slotNames(SP)) ){
attribute <- SP@data[,zcol]
for(i in 1:length(SP.ll@data)) {
if(identical(attribute,SP.ll@data[,i])) {
attributeName <- names(SP.ll@data)[i] }
}
}
if(layerName=="") {
layerName <- nameOfSP
}
if(strokeColor!="") {
rgbc <- col2rgb(strokeColor)
strokeColor <- rgb(rgbc[1],rgbc[2],rgbc[3],maxColorValue=255)
}
if(!is.list(previousMap)) {
# Creating functions for checkbox control, Show, Hide and Toggle control
functions <- createMapFunctions()
init <- createInitialization(SP.ll,
add=T,
name=map,
divname=mapCanvas,
zoom=zoom,
fitBounds=fitBounds,
mapTypeId = mapTypeId,
disableDefaultUI=disableDefaultUI,
disableDoubleClickZoom =disableDoubleClickZoom,
draggable= draggable,
keyboardShortcuts=keyboardShortcuts,
mapTypeControlOptions=mapTypeControlOptions,
scaleControlOptions=scaleControlOptions,
navigationControl=navigationControl,
navigationControlOptions=navigationControlOptions,
noClear=noClear,
scrollwheel=scrollwheel,
streetViewControl= streetViewControl)
# Put all functions together
functions <- paste(functions,init, sep="")
} else {
functions <- previousMap$functions
}
fjs <- ""
# fjs<-paste(fjs,'\n USGSOverlay.prototype = new google.maps.OverlayView(); \n',sep="")
# fjs<-paste(fjs,'function USGSOverlay(bounds, image, map) {\n this.bounds_ = bounds;\n this.image_ = image;\n this.map_ = map;\n this.div_ = null;\n this.setMap(map); }\n',sep="")
# fjs<-paste(fjs,'USGSOverlay.prototype.onAdd = function() {\n var div = document.createElement("DIV");\n div.style.border = "none";\n div.style.borderWidth = "0px";\n div.style.position = "absolute";\n var img = document.createElement("img");\n img.src = this.image_;\n img.style.width = "100%";\n img.style.height = "100%";\n div.appendChild(img);\n this.div_ = div;\n this.div_.style.opacity = ',fillOpacity,';\n var panes = this.getPanes();\n panes.overlayImage.appendChild(this.div_);}\n' ,sep="")
# fjs<-paste(fjs,'USGSOverlay.prototype.draw = function() {\n var overlayProjection = this.getProjection();\n var sw = overlayProjection.fromLatLngToDivPixel(this.bounds_.getSouthWest());\n var ne = overlayProjection.fromLatLngToDivPixel(this.bounds_.getNorthEast());\n var div = this.div_;\n div.style.left = sw.x + "px";\n div.style.top = ne.y + "px";\n div.style.width = (ne.x - sw.x) + "px";\n div.style.height = (sw.y - ne.y) + "px";} \n' ,sep="")
# fjs<-paste(fjs,'USGSOverlay.prototype.onRemove = function() { \n this.div_.parentNode.removeChild(this.div_);} \n' ,sep="")
# fjs<-paste(fjs,'USGSOverlay.prototype.hide = function() { if (this.div_) { this.div_.style.visibility = "hidden";} } \n' ,sep="")
# fjs<-paste(fjs,'USGSOverlay.prototype.show = function() {if (this.div_) { this.div_.style.visibility = "visible";}} \n' ,sep="")
# fjs<-paste(fjs,'USGSOverlay.prototype.toggle = function() { \n if (this.div_) { \n if (this.div_.style.visibility == "hidden") { \n this.show(); \n } else { \n this.hide(); } } } \n' ,sep="")
# fjs<-paste(fjs,'USGSOverlay.prototype.toggleDOM = function() {\n if (this.getMap()) {\n this.setMap(null);\n } else {\n this.setMap(this.map_);}}\n' ,sep="")
if(map.width!=control.width & css=="") {
css <- paste('\n #',mapCanvas,' { float: left; width:', map.width,'; height:' , map.height,'; }',
'\n #cBoxes {float: left; width:', control.width,'; height: ', control.height,'; overflow:auto} \n', sep='')
} else if(css=="") {
css <- paste(' #',mapCanvas,' {min-height: 100%;height:auto; } \n #cBoxes {position:absolute;right:5px; top:50px; background:white}',sep='')
}
starthtm <- paste('<!DOCTYPE html> \n <html> \n <head> \n <meta name="viewport" content="initial-scale=1.0, user-scalable=no" />',
'<meta charset="utf-8"> \n <style type="text/css"> \n html { height: 100% ; font-size: small} \n body { height: 100%; margin: 0px; padding: 0px }',
css,'</style> \n',
'<script type="text/javascript" src="',api,'"> </script> \n',
'<script language="javascript"> \n ',sep='')
starthtm <- paste(starthtm, fjs)
################################################################################
randNum <- sample(1:10000, 1)
## symbolGoogleMaps() only applies to SpatialPointsDataFrame
if(class(SP)[1]=="SpatialPointsDataFrame") {
pointsName <- paste('markers',nameOfSP,randNum, sep="")
# Create check box name for checkbox control
boxname <- paste(pointsName,'box',sep="")
att <- rep(NA,.5*length(slot(SP.ll,"coords")))
att1 <- ""
if(!is.list(previousMap)) {
# Declare JavaScript variables
var <- createJsVars(map = map)
} else {
var <- previousMap$var
}
var <- paste0(var,'\nvar ',pointsName,'=[];\n')
## att is a character vector for marker Titles. Handle embedded single quotes
k <- 1:length(names(SP.ll@data))
att <- paste(lapply(as.list(1:length(SP.ll@coords[,1])),
function(i) paste(names(SP.ll@data)[k],": ",
sapply(k, function(k) as.character(SP.ll@data[i,k])), collapse="\\r", sep="")))
att <- gsub("'","\\\\'",att)
## If funcSetMarkerTitleText argument is specified, call it to specify marker title text
if(is.function(funcSetMarkerTitleText)) {
attCustom <- funcSetMarkerTitleText(SP.ll)
## Make sure that attCustom is a character vector of the same length as att
if(!is.character(attCustom) || length(attCustom) != length(att)) {
warning("funcSetMarkerTitleText function returned class of ",class(attCustom),", expected character vector of length ",length(att),". Using default text for marker titles")
} else {
## Use custom values generated by funcSetInfoWindowText
att <- gsub("'","\\\\'",attCustom)
}
}
## Generate code to create Symbols
var1 <- ""
var1 <- paste(sapply(as.list(1:length(SP.ll@coords[,1])),
function(i) paste(var1,
createSymbol(lonlat=SP.ll@coords[i,],
zcolData=SP@data[i,zcol],
title=paste(att[i],sep=""),
clickable=clickable,
draggable=draggableMarker,
flat=flat,
map=map,
visible=visible,
zIndex=ifelse(length(zIndex)==nrow(SP.ll@data),zIndex[i],zIndex[1]),
symbolPath=ifelse(length(symbolPath)==nrow(SP.ll@data),symbolPath[i],symbolPath[1]),
symbolFillColor=ifelse(length(symbolFillColor)==nrow(SP.ll@data),symbolFillColor[i],symbolFillColor[1]),
symbolFillOpacity=ifelse(length(symbolFillOpacity)==nrow(SP.ll@data),symbolFillOpacity[i],symbolFillOpacity[1]),
symbolScale=sqrt(SP@data[i,zcol]/pi)*2 / zcolIndexBase * minScale,
## Add linear scale option? SP@data[i,zcol]/zcolIndexBase * minScale,
strokeColor=ifelse(length(strokeColor)==nrow(SP.ll@data),strokeColor[i],strokeColor[1]),
strokeWeight=ifelse(length(strokeWeight)==nrow(SP.ll@data),strokeWeight[i],strokeWeight[1]),
strokeOpacity=ifelse(length(strokeOpacity)==nrow(SP.ll@data),strokeOpacity[i],strokeOpacity[1])),
'\n',sep="")),
pointsName,'.push(marker); \n',sep="",collapse='\n')
## att is a character vector of HTML strings to display in InfoWindow. Handle embedded single quotes
att <- paste(lapply(as.list(1:length(SP.ll@coords[,1])),
function(i) paste(names(SP.ll@data)[k],': ',
sapply(k, function(k) as.character(SP.ll@data[i,k])), collapse=" <br>", sep="")))
att <- gsub("'","\\\\'",att)
## If funcSetInfoWindowText argument is specified, call it to specify InfoWindow text
if(is.function(funcSetInfoWindowText)) {
attCustom <- funcSetInfoWindowText(SP.ll)
## Make sure that attCustom is a character vector of the same length as att
if(!is.character(attCustom) || length(attCustom) != length(att)) {
warning("funcSetInfoWindowText function returned class of ",class(attCustom),", expected character vector of length ",length(att),". Using default text for InfoWindow")
} else {
## Use custom values generated by funcSetInfoWindowText
att <- gsub("'","\\\\'",attCustom)
}
}
var <- paste(var,var1)
infW <- ""
infW <- paste(lapply(as.list(1:length(SP.ll@coords[,1])),
function(i) {
paste(infW,
createInfoWindowEventM(Marker=paste(pointsName,'[',i-1,'] ',sep=""),
content=att[i],
map=InfoWindowControl$map,
event=InfoWindowControl$event,
position= InfoWindowControl$position,
disableAutoPan = InfoWindowControl$disableAutoPan,
maxWidth=InfoWindowControl$maxWidth,
pixelOffset=InfoWindowControl$pixelOffset,
zIndex=InfoWindowControl$zIndex),' \n')
}),
collapse='\n')
## If layerNameEnabled is FALSE, hide this map layer on load
functions <- paste(functions,infW,
ifelse(layerNameEnabled,'\n showO(','\n hideO('),
pointsName,',"',boxname,'",',map,');',sep="")
## Add traffic, transit and/or bicycling layer show/hide JavaScript function calls
functions <- paste0(functions,
createMapLayerJsCalls(map = map,
boxnamePrefix = boxname,
trafficLayerEnabled = trafficLayerEnabled,
transitLayerEnabled = transitLayerEnabled,
bicycleLayerEnabled = bicycleLayerEnabled))
## Create/update <script> and <head> closure and add map legend html
if(!is.list(previousMap)) {
endhtm <- paste('</script> \n </head> \n <body onload="initialize()"> \n <div id="',mapCanvas,'"></div> \n
\n <div id="cBoxes"> \n', sep='')
} else {
endhtm<- previousMap$endhtm
}
if(control) {
if(is.character(layerGroupName)) {
endhtm <- paste(endhtm,'<table style="border-collapse:collapse; width:100%;"> <tr> <td> <b>',
paste(layerGroupName,collapse = " <br> "),'</b> </td> </tr> </table> \n',sep="")
}
endhtm <- paste(endhtm,'<table style="border-collapse:collapse; width:100%;"> <tr> <td> <input type="checkbox" id="',boxname,
'" onClick=\'boxclick(this,',pointsName,',"',boxname,'",',map,');\' /> <b>', layerName,'</b> </td> </tr> </table> \n',sep="")
## Add optional traffic, transit and bicycle layers
endhtm <- paste0(endhtm,
createMapLayerHtml(map = map,
boxnamePrefix = boxname,
trafficLayerEnabled = trafficLayerEnabled,trafficLayerName = trafficLayerName,
transitLayerEnabled = transitLayerEnabled,transitLayerName = transitLayerName,
bicycleLayerEnabled = bicycleLayerEnabled,bicycleLayerName = bicycleLayerName))
}
} else {
## SP object is not supported for plotting using symbols
message("SP object must be SpatialPointsDataFrame class!")
}
if(!add) {
functions <- paste(functions,"\n google.maps.event.addListener( " ,map,", 'rightclick', function(event) {
var lat = event.latLng.lat();
var lng = event.latLng.lng();
alert('Lat=' + lat + '; Lng=' + lng);}); " , " \n }" )
endhtm <- paste(endhtm,'</div> \n </body> \n </html>')
write(starthtm, filename,append=FALSE)
write(var, filename,append=TRUE)
write(functions, filename,append=TRUE)
write(endhtm, filename,append=TRUE)
if(openMap) {browseURL(filename)}
}
return(list(starthtm=starthtm,var=var,functions=functions,endhtm=endhtm))
}
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## Modified plotGoogleMaps to use Google symbols as markers
## DC 6/3/2015 Initial version uses circles for SpatialPointsDataFrames only
symbolGoogleMaps <-
function(SP,
filename="",
zcol=1,
add=FALSE,
previousMap=NULL,
symbolPath="google.maps.SymbolPath.CIRCLE",
minScale=5,
zcolIndexBase=mean(sqrt(SP@data[,zcol]/pi)*2,na.rm = TRUE),
symbolFillColor="red",
symbolFillOpacity=0.7,
strokeColor="white",
strokeOpacity=1,
strokeWeight=1,
clickable=TRUE,
draggableMarker=FALSE,
flat=TRUE,
visible=TRUE,
zIndex="null",
map.width="100%",
map.height="100%",
layerName="",
layerNameEnabled=TRUE,
layerGroupName=FALSE,
control.width="100%",
control.height="100%",
zoom=15,
fitBounds=TRUE,
mapTypeId = "HYBRID",
disableDoubleClickZoom =FALSE,
draggable= TRUE ,
keyboardShortcuts=TRUE,
mapTypeControlOptions='DEFAULT',
navigationControl=TRUE,
navigationControlOptions='DEFAULT',
scaleControlOptions= 'STANDARD',
noClear=FALSE,
scrollwheel =TRUE ,
streetViewControl= FALSE,
control=TRUE,
InfoWindowControl=list(map=map, event="click",position="event.latLng",
disableAutoPan=FALSE, maxWidth=330,pixelOffset="null",
zIndex="null") ,
funcSetInfoWindowText=NULL,
funcSetMarkerTitleText=NULL,
map="map",
mapCanvas="map_canvas",
css = "",
api="https://maps.googleapis.com/maps/api/js?libraries=visualization",
openMap= TRUE,
trafficLayerEnabled = NULL,
trafficLayerName = "Traffic",
transitLayerEnabled = NULL,
transitLayerName = "Transit",
bicycleLayerEnabled = NULL,
bicycleLayerName = "Bicycle",
...) {
###############################################################################
############################### symbolGoogleMaps ##############################
###############################################################################
# wd=getwd()
## Check new arguments
if(!is.logical(layerNameEnabled)) {
warning("layerNameEnabled must be TRUE to show map layer on map load or FALSE to hide map layer. Using default of TRUE")
layerNameEnabled <- TRUE
}
if(!is.null(funcSetInfoWindowText) && !is.function(funcSetInfoWindowText)) {
warning("funcSetInfoWindowText must be NULL or a function that accepts a sp object and returns a character vector of InfoWindow marker strings. Using defaults.")
funcSetInfoWindowText <- NULL
}
if(!is.null(funcSetMarkerTitleText) && !is.function(funcSetMarkerTitleText)) {
warning("funcSetMarkerTitleText must be NULL or a function that accepts a sp object and returns a character vector of marker title strings. Using defaults.")
funcSetMarkerTitleText <- NULL
}
if(is.logical(layerGroupName) && layerGroupName || !is.logical(layerGroupName) && !is.character(layerGroupName)) {
warning("layerGroupName must be FALSE or a character string to use as the group name for this layer")
}
nameOfSP <- sapply(as.list(substitute({SP})[-1]), deparse)
nameOfSP <- gsub("\\s","", nameOfSP)
nameOfSP <- gsub('[!,",#,$,%,&,(,),*,+,-,.,/,:,;,<,=,>,?,@,_,^,`,|,~]', "x", nameOfSP)
nameOfSP <- gsub('[[]', "X", nameOfSP)
nameOfSP <- gsub('[]]', "X", nameOfSP)
temporary <- FALSE
## 6/26/2015: Only use temporary folder (vs. current working directory) if filename is "" AND add is FALSE
if(filename=="" && !add){
filename <- tempfile("map", fileext = c(".html"))
temporary <- TRUE
}
if(class(SP)[1]=="RasterLayer") {
SP <- projectRaster( SP , crs=CRS("+proj=longlat +datum=WGS84"))
SP <- as(SP , 'SpatialGridDataFrame')
SP.ll <- SP
}
if ((class(SP)[1]=="SpatialPixelsDataFrame" || class(SP)[1]=="SpatialGridDataFrame" ) ) {
r <- raster(SP, layer=zcol)
SP <- projectRaster( r , crs=CRS("+proj=longlat +datum=WGS84"))
SP <- as(SP , 'SpatialGridDataFrame')
SP.ll <- SP
} else {
SP.ll <- spTransform(SP, CRS("+proj=longlat +datum=WGS84"))
## If SP was already in the required projection, use the original SP to preserve @bbox settings
## spTranform() will reset @bbox to show entire object
if(identicalCRS(SP,SP.ll)) {
SP.ll <- SP
}
}
disableDefaultUI <- FALSE
Centar <- c(mean(SP.ll@bbox[1,]),mean(SP.ll@bbox[2,]))
sw <- c(SP.ll@bbox[2,1],SP.ll@bbox[1,1])
ne <- c(SP.ll@bbox[2,2],SP.ll@bbox[1,2])
if(any('data'==slotNames(SP)) ){
attribute <- SP@data[,zcol]
for(i in 1:length(SP.ll@data)) {
if(identical(attribute,SP.ll@data[,i])) {
attributeName <- names(SP.ll@data)[i] }
}
}
if(layerName=="") {
layerName <- nameOfSP
}
if(strokeColor!="") {
rgbc <- col2rgb(strokeColor)
strokeColor <- rgb(rgbc[1],rgbc[2],rgbc[3],maxColorValue=255)
}
if(!is.list(previousMap)) {
# Creating functions for checkbox control, Show, Hide and Toggle control
functions <- createMapFunctions()
init <- createInitialization(SP.ll,
add=T,
name=map,
divname=mapCanvas,
zoom=zoom,
fitBounds=fitBounds,
mapTypeId = mapTypeId,
disableDefaultUI=disableDefaultUI,
disableDoubleClickZoom =disableDoubleClickZoom,
draggable= draggable,
keyboardShortcuts=keyboardShortcuts,
mapTypeControlOptions=mapTypeControlOptions,
scaleControlOptions=scaleControlOptions,
navigationControl=navigationControl,
navigationControlOptions=navigationControlOptions,
noClear=noClear,
scrollwheel=scrollwheel,
streetViewControl= streetViewControl)
# Put all functions together
functions <- paste(functions,init, sep="")
} else {
functions <- previousMap$functions
}
fjs <- ""
# fjs<-paste(fjs,'\n USGSOverlay.prototype = new google.maps.OverlayView(); \n',sep="")
# fjs<-paste(fjs,'function USGSOverlay(bounds, image, map) {\n this.bounds_ = bounds;\n this.image_ = image;\n this.map_ = map;\n this.div_ = null;\n this.setMap(map); }\n',sep="")
# fjs<-paste(fjs,'USGSOverlay.prototype.onAdd = function() {\n var div = document.createElement("DIV");\n div.style.border = "none";\n div.style.borderWidth = "0px";\n div.style.position = "absolute";\n var img = document.createElement("img");\n img.src = this.image_;\n img.style.width = "100%";\n img.style.height = "100%";\n div.appendChild(img);\n this.div_ = div;\n this.div_.style.opacity = ',fillOpacity,';\n var panes = this.getPanes();\n panes.overlayImage.appendChild(this.div_);}\n' ,sep="")
# fjs<-paste(fjs,'USGSOverlay.prototype.draw = function() {\n var overlayProjection = this.getProjection();\n var sw = overlayProjection.fromLatLngToDivPixel(this.bounds_.getSouthWest());\n var ne = overlayProjection.fromLatLngToDivPixel(this.bounds_.getNorthEast());\n var div = this.div_;\n div.style.left = sw.x + "px";\n div.style.top = ne.y + "px";\n div.style.width = (ne.x - sw.x) + "px";\n div.style.height = (sw.y - ne.y) + "px";} \n' ,sep="")
# fjs<-paste(fjs,'USGSOverlay.prototype.onRemove = function() { \n this.div_.parentNode.removeChild(this.div_);} \n' ,sep="")
# fjs<-paste(fjs,'USGSOverlay.prototype.hide = function() { if (this.div_) { this.div_.style.visibility = "hidden";} } \n' ,sep="")
# fjs<-paste(fjs,'USGSOverlay.prototype.show = function() {if (this.div_) { this.div_.style.visibility = "visible";}} \n' ,sep="")
# fjs<-paste(fjs,'USGSOverlay.prototype.toggle = function() { \n if (this.div_) { \n if (this.div_.style.visibility == "hidden") { \n this.show(); \n } else { \n this.hide(); } } } \n' ,sep="")
# fjs<-paste(fjs,'USGSOverlay.prototype.toggleDOM = function() {\n if (this.getMap()) {\n this.setMap(null);\n } else {\n this.setMap(this.map_);}}\n' ,sep="")
if(map.width!=control.width & css=="") {
css <- paste('\n #',mapCanvas,' { float: left; width:', map.width,'; height:' , map.height,'; }',
'\n #cBoxes {float: left; width:', control.width,'; height: ', control.height,'; overflow:auto} \n', sep='')
} else if(css=="") {
css <- paste(' #',mapCanvas,' {min-height: 100%;height:auto; } \n #cBoxes {position:absolute;right:5px; top:50px; background:white}',sep='')
}
starthtm <- paste('<!DOCTYPE html> \n <html> \n <head> \n <meta name="viewport" content="initial-scale=1.0, user-scalable=no" />',
'<meta charset="utf-8"> \n <style type="text/css"> \n html { height: 100% ; font-size: small} \n body { height: 100%; margin: 0px; padding: 0px }',
css,'</style> \n',
'<script type="text/javascript" src="',api,'"> </script> \n',
'<script language="javascript"> \n ',sep='')
starthtm <- paste(starthtm, fjs)
################################################################################
randNum <- sample(1:10000, 1)
## symbolGoogleMaps() only applies to SpatialPointsDataFrame
if(class(SP)[1]=="SpatialPointsDataFrame") {
pointsName <- paste('markers',nameOfSP,randNum, sep="")
# Create check box name for checkbox control
boxname <- paste(pointsName,'box',sep="")
att <- rep(NA,.5*length(slot(SP.ll,"coords")))
att1 <- ""
if(!is.list(previousMap)) {
# Declare JavaScript variables
var <- createJsVars(map = map)
} else {
var <- previousMap$var
}
var <- paste0(var,'\nvar ',pointsName,'=[];\n')
## att is a character vector for marker Titles. Handle embedded single quotes
k <- 1:length(names(SP.ll@data))
att <- paste(lapply(as.list(1:length(SP.ll@coords[,1])),
function(i) paste(names(SP.ll@data)[k],": ",
sapply(k, function(k) as.character(SP.ll@data[i,k])), collapse="\\r", sep="")))
att <- gsub("'","\\\\'",att)
## If funcSetMarkerTitleText argument is specified, call it to specify marker title text
if(is.function(funcSetMarkerTitleText)) {
attCustom <- funcSetMarkerTitleText(SP.ll)
## Make sure that attCustom is a character vector of the same length as att
if(!is.character(attCustom) || length(attCustom) != length(att)) {
warning("funcSetMarkerTitleText function returned class of ",class(attCustom),", expected character vector of length ",length(att),". Using default text for marker titles")
} else {
## Use custom values generated by funcSetInfoWindowText
att <- gsub("'","\\\\'",attCustom)
}
}
## Generate code to create Symbols
var1 <- ""
var1 <- paste(sapply(as.list(1:length(SP.ll@coords[,1])),
function(i) paste(var1,
createSymbol(lonlat=SP.ll@coords[i,],
zcolData=SP@data[i,zcol],
title=paste(att[i],sep=""),
clickable=clickable,
draggable=draggableMarker,
flat=flat,
map=map,
visible=visible,
zIndex=ifelse(length(zIndex)==nrow(SP.ll@data),zIndex[i],zIndex[1]),
symbolPath=ifelse(length(symbolPath)==nrow(SP.ll@data),symbolPath[i],symbolPath[1]),
symbolFillColor=ifelse(length(symbolFillColor)==nrow(SP.ll@data),symbolFillColor[i],symbolFillColor[1]),
symbolFillOpacity=ifelse(length(symbolFillOpacity)==nrow(SP.ll@data),symbolFillOpacity[i],symbolFillOpacity[1]),
symbolScale=sqrt(SP@data[i,zcol]/pi)*2 / zcolIndexBase * minScale,
## Add linear scale option? SP@data[i,zcol]/zcolIndexBase * minScale,
strokeColor=ifelse(length(strokeColor)==nrow(SP.ll@data),strokeColor[i],strokeColor[1]),
strokeWeight=ifelse(length(strokeWeight)==nrow(SP.ll@data),strokeWeight[i],strokeWeight[1]),
strokeOpacity=ifelse(length(strokeOpacity)==nrow(SP.ll@data),strokeOpacity[i],strokeOpacity[1])),
'\n',sep="")),
pointsName,'.push(marker); \n',sep="",collapse='\n')
## att is a character vector of HTML strings to display in InfoWindow. Handle embedded single quotes
att <- paste(lapply(as.list(1:length(SP.ll@coords[,1])),
function(i) paste(names(SP.ll@data)[k],': ',
sapply(k, function(k) as.character(SP.ll@data[i,k])), collapse=" <br>", sep="")))
att <- gsub("'","\\\\'",att)
## If funcSetInfoWindowText argument is specified, call it to specify InfoWindow text
if(is.function(funcSetInfoWindowText)) {
attCustom <- funcSetInfoWindowText(SP.ll)
## Make sure that attCustom is a character vector of the same length as att
if(!is.character(attCustom) || length(attCustom) != length(att)) {
warning("funcSetInfoWindowText function returned class of ",class(attCustom),", expected character vector of length ",length(att),". Using default text for InfoWindow")
} else {
## Use custom values generated by funcSetInfoWindowText
att <- gsub("'","\\\\'",attCustom)
}
}
var <- paste(var,var1)
infW <- ""
infW <- paste(lapply(as.list(1:length(SP.ll@coords[,1])),
function(i) {
paste(infW,
createInfoWindowEventM(Marker=paste(pointsName,'[',i-1,'] ',sep=""),
content=att[i],
map=InfoWindowControl$map,
event=InfoWindowControl$event,
position= InfoWindowControl$position,
disableAutoPan = InfoWindowControl$disableAutoPan,
maxWidth=InfoWindowControl$maxWidth,
pixelOffset=InfoWindowControl$pixelOffset,
zIndex=InfoWindowControl$zIndex),' \n')
}),
collapse='\n')
## If layerNameEnabled is FALSE, hide this map layer on load
functions <- paste(functions,infW,
ifelse(layerNameEnabled,'\n showO(','\n hideO('),
pointsName,',"',boxname,'",',map,');',sep="")
## Add traffic, transit and/or bicycling layer show/hide JavaScript function calls
functions <- paste0(functions,
createMapLayerJsCalls(map = map,
boxnamePrefix = boxname,
trafficLayerEnabled = trafficLayerEnabled,
transitLayerEnabled = transitLayerEnabled,
bicycleLayerEnabled = bicycleLayerEnabled))
## Create/update <script> and <head> closure and add map legend html
if(!is.list(previousMap)) {
endhtm <- paste('</script> \n </head> \n <body onload="initialize()"> \n <div id="',mapCanvas,'"></div> \n
\n <div id="cBoxes"> \n', sep='')
} else {
endhtm<- previousMap$endhtm
}
if(control) {
if(is.character(layerGroupName)) {
endhtm <- paste(endhtm,'<table style="border-collapse:collapse; width:100%;"> <tr> <td> <b>',
paste(layerGroupName,collapse = " <br> "),'</b> </td> </tr> </table> \n',sep="")
}
endhtm <- paste(endhtm,'<table style="border-collapse:collapse; width:100%;"> <tr> <td> <input type="checkbox" id="',boxname,
'" onClick=\'boxclick(this,',pointsName,',"',boxname,'",',map,');\' /> <b>', layerName,'</b> </td> </tr> </table> \n',sep="")
## Add optional traffic, transit and bicycle layers
endhtm <- paste0(endhtm,
createMapLayerHtml(map = map,
boxnamePrefix = boxname,
trafficLayerEnabled = trafficLayerEnabled,trafficLayerName = trafficLayerName,
transitLayerEnabled = transitLayerEnabled,transitLayerName = transitLayerName,
bicycleLayerEnabled = bicycleLayerEnabled,bicycleLayerName = bicycleLayerName))
}
} else {
## SP object is not supported for plotting using symbols
message("SP object must be SpatialPointsDataFrame class!")
}
if(!add) {
functions <- paste(functions,"\n google.maps.event.addListener( " ,map,", 'rightclick', function(event) {
var lat = event.latLng.lat();
var lng = event.latLng.lng();
alert('Lat=' + lat + '; Lng=' + lng);}); " , " \n }" )
endhtm <- paste(endhtm,'</div> \n </body> \n </html>')
write(starthtm, filename,append=FALSE)
write(var, filename,append=TRUE)
write(functions, filename,append=TRUE)
write(endhtm, filename,append=TRUE)
if(openMap) {browseURL(filename)}
}
return(list(starthtm=starthtm,var=var,functions=functions,endhtm=endhtm))
}
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