Route between two points

VCL TMS VCL WebGMaps
1
Hi, I am evaluating the WebMap component and so far have located two places and add markers for them. Now I want to "draw" or make the route between both as google maps does.

I am using waypoints ( seen in demo ) but cant figure out what parameters should have or how to invoke them .

Can anyone give me some idea ?

Thanks so much.

2

You can use the overload of WebGMaps.RenderDirections() that has the parameter to add the list of waypoints, which is a TStringList of addresses as waypoints between start and end address:


    function RenderDirections(Origin, Destination: string;
      TravelMode: TTravelMode = tmDriving; AvoidHighways: Boolean = false;
      AvoidTolls: Boolean = false; WayPoints: TStringList = nil;
      OptimizeWayPoints: Boolean = false; RouteColor: TColor = clNone): Boolean; overload;

3
Hi Bruno, thanks for answer.
I dont know how to overload that function, where must I define that ?

This is my code.. could you tell me if it is correct ?

    WebGMapsGeocoding.Address := cDirEmpresa;

    if WebGMapsGeocoding.LaunchGeocoding = erok then
    begin
        webmap.MapOptions.DefaultLatitude  := WebGMapsGeocoding.ResultLatitude;
        webmap.MapOptions.DefaultLongitude := WebGMapsGeocoding.ResultLongitude;

        // add marker
        webmap.Markers.Add( WebGMapsGeocoding.ResultLatitude,    WebGMapsGeocoding.ResultLongitude, cDirEmpresa );
        WayPoints.Add( cDirEmpresa );

    end;

    WebGMapsGeocoding.Address := cDirCliente;
    if WebGMapsGeocoding.LaunchGeocoding = erok then
    begin

        webmap.MapOptions.DefaultLatitude  := WebGMapsGeocoding.ResultLatitude;
        webmap.MapOptions.DefaultLongitude := WebGMapsGeocoding.ResultLongitude;

        // add marker
        webmap.Markers.Add( WebGMapsGeocoding.ResultLatitude, WebGMapsGeocoding.ResultLongitude, cDirCliente );
        WayPoints.Add( cDirCliente );

        webmap.MapOptions.ZoomMap := 14;
        webmap.Launch;

        try
            webmap.GetDirections( cDirEmpresa, cDirCliente , True, tmDriving, usMetric, lnSpanish, True, True, WayPoints , True );
        finally
            WayPoints.Free;
        end;

cDirEmpresa and cDirCliente are strings with the two address I wanto to draw the route..

Many many thanks !!

4

Hi,


The WayPoints object should indeed be used as a parameter in the GetDirections call.
You can have a look at the WebGMapsDirections demo aplication for a full working example.

5
Hi Bar, as you can see in my code I have the WayPoint string in the parameters.

The demo it nos working for me because its says I am not the owner of the map.

Any help would be very appreciate.

Regards

6

We are not aware of any issues with the WebGMapsDirections demo.
The only thing that is required to make the app function correctly is a valid API Key value assigned to TWebGMaps.APIKey.


If the problem persists, please provide an exact description of what is going wrong and of the error message you are seeing so I can further investigate this.
7
Hi thanks for the answer. I am trying to test the demo and get the error showed in the image.

I've got a new api from google and assigned to the webmap component, and still have the error.

https://ibb.co/dFStV0

What can I do ??
8
Hi, I have changed all the code with the help of one of your youtube's videos and now its working.

Thanks a lot !!
9

Thanks for informing

10
Hi, Bruno, just a "small" question.
It is possible to center the map again after searching two address and draw a route between them ?

Thanksss !!!
11

You can move the center position of the map programmatically by calling

WebGMaps.MapPanTo(lat,lon)
12
Perfect..
Thanks !!!!