B4J Question jGoogleMaps & AddPolyline error?

[Arnaud]

Hello,

I use the library jGoogleMap 1.82 and AddPolyline function. It works fine on some Windows 10 and not on some other Windows 10, I don t understand why. Please find the screenshot and see the difference between the 2 result, one correct and 1 not correct.

The Polyline has segments and it is not placed correctly, there is also a few shift with the map of Google.

I use also the "marker", the marker works fine on the both Windows.

Thanks for your help.

 

[roerGarcia]

Screen resolution or pixel density?

 

[TILogistic]

How many decimal places do you use in the points of the polyline?

 

[Arnaud]

The resolution is 1920 x 1080.

The size of the list in the polyline is 2177 points, each point contains the polar coordinates with 6 number after the decimal :


exemple :

Private coordinate  As LatLng
coordinate .Initialize(50.888789,6.614651)       

list_for_polyline.add(coordinate,.......)

Thanks for your replies.

 

[TILogistic]

test;

GoogleMapsDemo

Some time ago I played a lot with GoogleMaps according to this post: https://www.b4x.com/android/forum/threads/problem-with-googlemaps-handling-polygons.84238/#post-533844 The problem was to add other shapes on a googlemap overlapping existing shapes. When you move the mouse over an existing...

www.b4x.com

GoogleMapsDemo.zip

 

[TILogistic]

Different zooms without problem

 

[Arnaud]

Hello,


Sorry for the delay. I have had news. I have done test with the GoogleMapDemoLight program and same problem.

1 - I draw 4 line with the mouse, no problem (picture in attachment "polyline creation.png")
2 - I valid and finish the polyline by a right click on the mouse ---> the error appear (picture in attachment "square finished.png")
3 - If I change the zoom the error change and move, and with a zoom far away, I can see my square


Here a link with the video and the problem when I change the zoom
http://alfanovisualdata.com/download/PROTOTYPE2/polyline error.mp4

 

[klaus]

I hadn't used the GoogleMapDemo programs for quite some time.
Tested it again, and I see the same problem.
Testing further, I found that the problem is the text size set in Windows.
I use, by default, 125%.
Setting the text size to 100% it works as expected.
When I wrote the GoogleMapsDemo programs I already used 125% text size, and it was with Windows 10. So, I do not know what has changed.
I think that Erel needs to look at this.

 

[Arnaud]

Hello,

Thanks @klaus, please let s me know if you have news.

 

[DonManfred]

Thanks @klaus, please let s me know if you have news.

Set the fontsize in your windows to 100%

 

[Arnaud]

Yes I have tested and it works fine.

Is there a way to update the jgooglemap libray polyline directly in function of the font size of Windows?

It is difficult to ask at the customer to change his font size...

 

[klaus]

As written in my post #8: I think that Erel needs to look at this.
Only Erel can do something, he has written the jGoogleMaps library or a wrapper.

 

[Erel]

The issue isn't in the wrapper. It sounds like a bug in JavaFX WebView (or in the maps JavaScript SDK).

 

[klaus]

Unfortunately, that is what I suspected.
The strange thing is that when I wrote the GoogleMapsDemo programs I already used 125% text size, and it was with Windows 10.
I just made another test and found that it works well with Java 8 but not with Java 11.

 

[klaus]

It works OK with Java 19.