Polygon tagstring label not visible

VCL TMS VCL WebGMaps
1

I can't get polyline or polygon labels to display on Google map.


I have set PolygonLabel.visible := true after clearing map of objects and before drawing polylines and polygons.

Then when when creating each polyline and polygon I set the .tagstring := some text string (while setting other properties), then I call CreateMapPolyline.

All of the objects draw on the map fine, but no tagstring label appears when hovering over them (the objects are responding to mouse hover over, as I manage to change their colour).

Any suggestions? am I doing things in the right order? Am I missing a key step? Do I need to update objects after creating them?
2

Hi,


Please note that the TagString property is only used for internal reference.
Unfortunately it's currently not supported to display a label or hint for polylines and polygons.
However, this is a good suggestion and we'll consider adding this feature in a future version if it's supported by the Google Maps API.

As an alternative you could add an additional marker to the map with the MapLabel.Text assigned.
3

Thanks Bart for the quick reply :-), I will try some markers as you suggest.


PS I was trying to use the TagString because the user guide suggested this was possible.  Perhaps you could update the guide to clarify the situation?  
I am reading p18 of the TMS VCL WebGMaps Developers Guide (v2.9.9 code):  "PolygonLabel: Configure the appearance of the Polygon/Polyline hints. (If a value is assigned to the TagString property of a Polygon or Polyline, this will be displayed as a hint when the Polygon or Polyline is hovered and PolygonLabel.Visible is set to True)."


< ="text/">
p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Calibri}
4

You are correct.
I was confusing TagString with another property.

The TagString value should indeed be displayed as a hint when hovering a polygon object.

Example:
var
  p: TPolygonItem;
begin
  p := WebGMaps1.Polygons.Add;
  p.Polygon.PolygonType := ptCircle;
  p.Polygon.Center.Latitude := WebGMaps1.MapOptions.DefaultLatitude;
  p.Polygon.Center.Longitude := WebGMaps1.MapOptions.DefaultLongitude;
  p.Polygon.Radius := 10000;
  p.Polygon.TagString := 'Hello World';

  WebGMaps1.CreateMapPolygon(p.Polygon);

Please make sure you are adding the polygon after the DownloadFinish event was triggered.