javascript map polylines, set opacity to zero if criteria doesn't match
I have the following code that currently draws polylines of across gps coordinates:
function update() {
// if not today, then stick data in corner and hide
feature.attr("transform",
function(d) {
if (d.day == timerCount) {
d3.select("#monthLabel").text("Date: " + d.Date);
lineArray1 = latlongs.slice(d.S1,d.S2);
var polylineArray = [
L.polyline(lineArray1, {color: 'red', opacity: 1}),
]
var polylines = L.layerGroup(polylineArray);
mappedlines = polylines.addTo(map);}});
What I want to do is use another function that will hide the polyline if a date has passed by (currently it leaves all poylines on the map).
I thought using something like:
polylineArray.style("opacity", function(d) {
if (d.day == timerCount) {
return 1;
} else {
return 0;
}
});
Would work but it doesn't, any way to set the opacity to zero or delete the lines if day doesn't match timerCount?
javascript dictionary d3.js leaflet
asked Nov 22 '18 at 6:27
AndyAndy
537
add a comment |
I have the following code that currently draws polylines of across gps coordinates:
function update() {
// if not today, then stick data in corner and hide
feature.attr("transform",
function(d) {
if (d.day == timerCount) {
d3.select("#monthLabel").text("Date: " + d.Date);
lineArray1 = latlongs.slice(d.S1,d.S2);
var polylineArray = [
L.polyline(lineArray1, {color: 'red', opacity: 1}),
]
var polylines = L.layerGroup(polylineArray);
mappedlines = polylines.addTo(map);}});
What I want to do is use another function that will hide the polyline if a date has passed by (currently it leaves all poylines on the map).
I thought using something like:
polylineArray.style("opacity", function(d) {
if (d.day == timerCount) {
return 1;
} else {
return 0;
}
});
Would work but it doesn't, any way to set the opacity to zero or delete the lines if day doesn't match timerCount?
javascript dictionary d3.js leaflet
asked Nov 22 '18 at 6:27
AndyAndy
537
The opacity function looks good but it seems you're applying it to a plainArray, it should be to a d3Selection.
– Zim
Nov 22 '18 at 7:40
How would I make the array into a d3 selection?
– Andy
Nov 22 '18 at 21:54
What isL.polyline?
– Zim
Nov 23 '18 at 8:22
add a comment |
I have the following code that currently draws polylines of across gps coordinates:
function update() {
// if not today, then stick data in corner and hide
feature.attr("transform",
function(d) {
if (d.day == timerCount) {
d3.select("#monthLabel").text("Date: " + d.Date);
lineArray1 = latlongs.slice(d.S1,d.S2);
var polylineArray = [
L.polyline(lineArray1, {color: 'red', opacity: 1}),
]
var polylines = L.layerGroup(polylineArray);
mappedlines = polylines.addTo(map);}});
What I want to do is use another function that will hide the polyline if a date has passed by (currently it leaves all poylines on the map).
I thought using something like:
polylineArray.style("opacity", function(d) {
if (d.day == timerCount) {
return 1;
} else {
return 0;
}
});
Would work but it doesn't, any way to set the opacity to zero or delete the lines if day doesn't match timerCount?
javascript dictionary d3.js leaflet
asked Nov 22 '18 at 6:27
AndyAndy
537
I have the following code that currently draws polylines of across gps coordinates:
function update() {
// if not today, then stick data in corner and hide
feature.attr("transform",
function(d) {
if (d.day == timerCount) {
d3.select("#monthLabel").text("Date: " + d.Date);
lineArray1 = latlongs.slice(d.S1,d.S2);
var polylineArray = [
L.polyline(lineArray1, {color: 'red', opacity: 1}),
]
var polylines = L.layerGroup(polylineArray);
mappedlines = polylines.addTo(map);}});
What I want to do is use another function that will hide the polyline if a date has passed by (currently it leaves all poylines on the map).
I thought using something like:
polylineArray.style("opacity", function(d) {
if (d.day == timerCount) {
return 1;
} else {
return 0;
}
});
Would work but it doesn't, any way to set the opacity to zero or delete the lines if day doesn't match timerCount?
javascript dictionary d3.js leaflet
javascript dictionary d3.js leaflet
asked Nov 22 '18 at 6:27
AndyAndy
537
asked Nov 22 '18 at 6:27
AndyAndy
537
asked Nov 22 '18 at 6:27
AndyAndy
537
asked Nov 22 '18 at 6:27
AndyAndy
537
asked Nov 22 '18 at 6:27
AndyAndy
537
537
The opacity function looks good but it seems you're applying it to a plainArray, it should be to a d3Selection.
– Zim
Nov 22 '18 at 7:40
How would I make the array into a d3 selection?
– Andy
Nov 22 '18 at 21:54
What isL.polyline?
– Zim
Nov 23 '18 at 8:22
add a comment |
The opacity function looks good but it seems you're applying it to a plainArray, it should be to a d3Selection.
– Zim
Nov 22 '18 at 7:40
How would I make the array into a d3 selection?
– Andy
Nov 22 '18 at 21:54
What isL.polyline?
– Zim
Nov 23 '18 at 8:22
The opacity function looks good but it seems you're applying it to a plain
Array, it should be to a d3 Selection.– Zim
Nov 22 '18 at 7:40
The opacity function looks good but it seems you're applying it to a plain
Array, it should be to a d3 Selection.– Zim
Nov 22 '18 at 7:40
How would I make the array into a d3 selection?
– Andy
Nov 22 '18 at 21:54
How would I make the array into a d3 selection?
– Andy
Nov 22 '18 at 21:54
What is
L.polyline ?– Zim
Nov 23 '18 at 8:22
What is
L.polyline ?– Zim
Nov 23 '18 at 8:22
add a comment |
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The opacity function looks good but it seems you're applying it to a plain
Array, it should be to a d3Selection.– Zim
Nov 22 '18 at 7:40
How would I make the array into a d3 selection?
– Andy
Nov 22 '18 at 21:54
What is
L.polyline?– Zim
Nov 23 '18 at 8:22