map-canvas | 基于baidu、google、openlayers、arcgis、高德地图、canvas数据可视化 | Map library
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kandi X-RAY | map-canvas Summary
基于baidu、google、openlayers、arcgis、高德地图、canvas数据可视化
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QUESTION
The Google map displays a series of waypoints, joined to form a route. The Waypoint is just a small red circle. The are several other markers: places of interest, transport links etc, of no direct relevance here here. All waypoints etc are retrieved from a MySQL database. All markers are called marker except waypoints which I call wpmark.
I have a mousemove listener which displays a continuous LatLong and a click listener which adds a map clicked LatLong to a textbox. The script is php which writes the JavaScript using MySQL database. The code is the JavaScript, simplified to remove hundreds of waypoints and other all other types of marker.
I want to add a click listener to each waypoint and to open a window nearby where I can add a menu. The map works just fine until I add the attempt at adding the new listener when the map does not display at all.
I have tried many formats of the addListener line of code but the result is always the same. Oh for a compiler which told you what the error was!
...ANSWER
Answered 2022-Feb-24 at 00:43There are two syntaxes available to add a click listener to a marker.
google.maps.MVCObject.addListener (where the marker is the MVCObject)
and
google.maps.event.addListener (which takes the "instance"/google.maps.Marker as the first argument).
google.maps.wpmark.addListener(wpmark, 'click', function(event){...}); is neither.
Either:
QUESTION
i want to make few groups and when i toggle specific i want to make it hidden. I will show you what ive made so far. But this hides everything, and i know why, because this marker.setVisible(true); the "marker" is global and it is not for specific group, but i dont know how to make it for specific group.
EDIT: Might not work, idk how to include js file...
Javascript
...ANSWER
Answered 2022-Jan-06 at 00:03The problem is that you call setVisible() method on the same marker each time when you loop in the locations array. to achieve what you want you need to store the markers objects when you create them, and after, when you need it, access it to delete them.
First, create arrays corresponding to each group you want to create. After that, when you create markers, store them in the array corresponding of his category.
QUESTION
I am trying to create a page that shows google map and allows users to draw lines on the map and save them.. but when I try to run the page, the map doesn't show up at all. What am I doing wrong? the page is literally blank with the form at the end.
I was having a look online for a solution.. I found this code and modified it with my api key
...ANSWER
Answered 2021-Nov-17 at 17:32- your HTML is invalid (no end tag for head, no start tag for body).
- when you are loading the API synchronously, you need to include it before you use it.
- when you are loading the API synchronously, you need to move the javascript after the DOM
code snippet:
QUESTION
I'm working on a web application for a disaster management lab assignment that is using the Google Places and Maps JavaScript API. The goal is to have markers on the map which are attached to an event listener which is supposed to show an information window with the data about a disaster report. However, the window is not showing up when I click on the marker. The pointer finger icon shows when I hover over a point, yet no information window appears when I click on the marker. There are zero errors in the dev console when I run it through IntelliJ and Tomcat, and I tried changing addListener to addEventListener but it still doesn't work. I will post my code below but let me know if you need anything else to help. For security reasons, I have replaced my API key with MY_API_KEY, so I guess you will have to have access to the Google API's yourself in order to help so I apologize for that. Thanks!
P.S.
When I tried creating the snippet it came up with the following error which I'm unsure where the error is coming from because there is no line 302 in the JS code:
{ "message": "Uncaught SyntaxError: Unexpected end of input", "filename": "https://stacksnippets.net/js", "lineno": 302, "colno": 5 }
Here's what the information window is supposed to look like:
...ANSWER
Answered 2021-Nov-12 at 20:12Thank you Randy for the solution! I had to modify the example from the Google Maps documentation to match what the lab wanted but I figured it out. I included the infowindow.setContent(marker['customInfo']); from my original code and changed my code to match the syntax from the documentation.
Here's the working code for the Click Listener:
QUESTION
so i found this snippet of code that lets you filter markers when you select them from dropdown, the code actually works if i take out the radio buttons from the dropdown and click them, but if i put them back in an actuall dropdown menu, it doesnt filter the markers, it just stays how it is. I want them to work like this - if i Select Rīga from the dropdown, only show markers that have it as marker[4].
...ANSWER
Answered 2021-May-22 at 12:13You just have to move the call of updateView(this); from the inline event listeners to your dropdown click handler. Then check in an if statement if the target was an input.
By the way you don't need to give this to updateView(); since it is just checking if this is truthy. So it is enough to give true to that function: updateView(true);
Move the function call from here:
QUESTION
I am currently plotting multiple lines on a map as part of a project.
I have been able to plot multiple polylines on a Google Map with the help of a few tutorials. But, all the polylines are of the same color and I want to them to be in different colors. How do I do it?
JS file
...ANSWER
Answered 2021-Apr-15 at 11:01Related question: how to draw a google maps waypoint with multi-colored polylines
- make an array of colors to apply to the polylines:
QUESTION
I'm trying to add a button in googlemap infoWindow but I'm beginner in javascript and I have spent weeks on this and still not working... So I hope one of you will be able to help me.
To explain you a litle bit... I get markers from a bdd to display them on a map. Then on marker click, a infoWindow opens with all info marker on it.
This is all working perfectly but then is when I don't get it.
I have added a submit button to each infoWindow markers and I would like an action on submit button click (save to database). But the button is not responding at all...
I removed all the code containing the save function to keep it all clear as there is a alert("click") to test the button...
...ANSWER
Answered 2021-Mar-06 at 20:41Your first problem is the saveBtn is not part of the DOM until the InfoWindow has been opened as you are adding as a string in the InfoWindow content.
Relate questions:
- using addDomListener with googlemaps not working
- Turn off google map's infowindow.open(map) asynchronous behaviour
- Adding Event Listener on button - Javascript
The second problem is that document.getElementsByClassName(class_name_saveBtn); returns an array. Instead of:
QUESTION
I want to export the HTML into PDF in Nodejs. My HTML file having a chart, graphs, images, and table data. I've created HTML with handlebar parsing as well as creating the one public URL for HTML of pdf. I've tried to export HTML to pdf using HTML-PDF NPM package but it can not load the charts, maps, etc just load simple HTML with table data. Here is an example of how I tried to export with an HTML page link:
...ANSWER
Answered 2021-Mar-04 at 10:56I did it using a Puppeteer. I've created one route in NodeJS which renders the HTML about how I want in my PDF. This route is accessible without a login so it does not require login. In my HTML file I've added the dynamic charts, google maps, images, and table listing.
I've created the PDF by writing the following in my export PDF route:
QUESTION
I am using SVG files to display icons in the map but one particular SVG doesnt work. I have tested that file and it looks fine in the browser, however, when doing that in the code, it just doesnt display anything , neither it fails:
...ANSWER
Answered 2021-Mar-03 at 13:42Your is missing the namespace (as @RobertLongson indicated in his comment):
QUESTION
I've difficulties to display a simple marker, indeed I have "Uncaught ReferenceError: google is not defined" in Chrome console and marker doesn't appear. I searched everywhere in the forum but nothing helped me. I really have looked at every article there is but this error always comes up and no markers are added.
I provide you my little HTML code
...ANSWER
Answered 2021-Feb-19 at 20:40The error google is not defined was thrown because you tried to use the google object before it is defined:
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