B4A Class Open Street Map viewer - GPS

irda said:

Hi, great job.
There must be a possibility but I can't find it. Is it possible to change the symbol of the current position (looks like the on/off button) and reduce the size of the +/- buttons? Thank you.
View attachment 129311

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irda said:

Thanks, but where is this image? I cant find it.

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Sergey_New said:

I get this picture in B4A:
View attachment 132529
What happened?
B4J in the map is displayed normally.

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Omar Parra A. said:

see:

Open Street Map viewer - GPS

I downloaded this https://www.b4x.com/android/forum/threads/127827/#content last week This worked initially but after a few runs I just blue lines in all the tiles no map. I tried changing the server, i tried running it on a tablet and phone, i tried compiling it on a desktop and laptop, i used...

www.b4x.com

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spsp said:

Hi,

This b4Xlib contains a custom view (cvMap) which can display Open Street Map.


View attachment 109092View attachment 109081



The tiles are retrieved from the internet and cached in a database. You can add shapes and images on the map.

UI :
- Lat/lng Center of the map
- Zoom Level
- Compass Direction with rotation
- Scale
- Button Menu
- Grid
- Center
- GPS position and bearing

Event :
- ready
- Lat/lng changed
- Zoom Level Changed
- Compass Direction Changed
- Shape Clicked
- Map Clicked
- Center Lat/lng clicked
- Button Menu clicked
- Scale clicked
- Compass Clicked
- GPS Clicked

Tile Server
2 new properties :

• tileServer : Choose your tile server (see https://wiki.openstreetmap.org/wiki/Tile_servers), default : https://a.tile.openstreetmap.org/
• userAgent : request to the tile server requires a user agent in the header. You can now set your own user Agent : default : Mozilla/5.0 (Windows NT 6.1; WOW64; rv:27.0) Gecko/20100101 Firefox/27.0

This 2 properties are available in the designer or with setter/getter from the cvmap : userAgent, tileServer

Dependencies :
- Core
- SQL
- OKHttpUtils2
- XUI
- XUI views

Other files in the b4xlib :
- coMapUtilities : code module with Types, functions, helpers
- clTileManager : standard class module to load tile from database and/or internet and save them into the database
- clMapShapeCirgle : standard class to draw circle on the map
- clMapShapeLine : standard class to draw line on the map
- clMapShapePolygon : standard class to draw polygon on the map
- clMapShapeImage : standard class to draw image on the map
- layout cvmap.bal and cvmap.bjl
- images for the compass and gps



How to use it :
- Just add the cvMap custom view with the designer
- create sub to handle events if necessary
- set options (lat/lng, zoom.....)

B4A example and B4J example included



spsp

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or with setter/getter from the cvmap : userAgent, tileServer

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petr4ppc said:

Dear friends, please for help,

I have read:


With b4A 11.20 and B4X map version 2.0 I cant see userAgent and tileServer parameters.
I am looking for them because I see blue lines as was wrote: https://www.b4x.com/android/forum/threads/open-street-map-viewer-gps.127827/post-901884

Please very much for help,
best regards
p4ppc

(on pictures are fcvpam parameters I see)

View attachment 137824View attachment 137825View attachment 137826View attachment 137827

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petr4ppc said:

Dear spsp,

I maybe being stupid but I dont know what I am doing wrong, please for help.

I have downloaded B4XMap.B4XLib from post #1. I see, it is Version 2.

I declare:

B4X:

Private fcvMap As cvMap

in fcvMap I am trying to find userAgent and tileServer
because of words in post #1: "or with setter/getter from the cvmap : userAgent, tileServer"

Please, what I am doing wrong,
thank you very much,
best regards
p4ppc

Click to expand...

private Sub fcvmap_ready
    fcvMap.TileServer="https://a.tile.openstreetmap.org/"
    fcvMap.UserAgent="User-AgentMozilla/5.0 (Windows NT 10.0; Win64; x64; rv:108.0) Gecko/20100101 Firefox/108.0"
    'set values
    fcvMap.Map=fMap
    'draw the map
    fcvMap.draw
End Sub

spsp said:

Hi,
userAgent and tileServer are 2 getter/setter of cvMap, so add this 2 lines in the fcvmap_ready sub

userAgent and tileServer:

private Sub fcvmap_ready
    fcvMap.TileServer="https://a.tile.openstreetmap.org/"
    fcvMap.UserAgent="User-AgentMozilla/5.0 (Windows NT 10.0; Win64; x64; rv:108.0) Gecko/20100101 Firefox/108.0"
    'set values
    fcvMap.Map=fMap
    'draw the map
    fcvMap.draw
End Sub

spsp

Click to expand...

spsp said:

Hi,

This b4Xlib contains a custom view (cvMap) which can display Open Street Map.

Click to expand...

spsp said:

Hi,

This b4Xlib contains a custom view (cvMap) which can display Open Street Map.


View attachment 109092View attachment 109081



The tiles are retrieved from the internet and cached in a database. You can add shapes and images on the map.

UI :
- Lat/lng Center of the map
- Zoom Level
- Compass Direction with rotation
- Scale
- Button Menu
- Grid
- Center
- GPS position and bearing

Event :
- ready
- Lat/lng changed
- Zoom Level Changed
- Compass Direction Changed
- Shape Clicked
- Map Clicked
- Center Lat/lng clicked
- Button Menu clicked
- Scale clicked
- Compass Clicked
- GPS Clicked

Tile Server
2 new properties :

• tileServer : Choose your tile server (see https://wiki.openstreetmap.org/wiki/Tile_servers), default : https://a.tile.openstreetmap.org/
• userAgent : request to the tile server requires a user agent in the header. You can now set your own user Agent : default : Mozilla/5.0 (Windows NT 6.1; WOW64; rv:27.0) Gecko/20100101 Firefox/27.0

This 2 properties are available in the designer or with setter/getter from the cvmap : userAgent, tileServer

Dependencies :
- Core
- SQL
- OKHttpUtils2
- XUI
- XUI views

Other files in the b4xlib :
- coMapUtilities : code module with Types, functions, helpers
- clTileManager : standard class module to load tile from database and/or internet and save them into the database
- clMapShapeCirgle : standard class to draw circle on the map
- clMapShapeLine : standard class to draw line on the map
- clMapShapePolygon : standard class to draw polygon on the map
- clMapShapeImage : standard class to draw image on the map
- layout cvmap.bal and cvmap.bjl
- images for the compass and gps



How to use it :
- Just add the cvMap custom view with the designer
- create sub to handle events if necessary
- set options (lat/lng, zoom.....)

B4A example and B4J example included



spsp

Click to expand...

Lakhtin_V said:

How should the code be redone so that the map is displayed based on a previously downloaded file with the OCM extension. I don't have internet access during the map rendering process and I want to use one locality OSM file that I downloaded earlier via export from mapsource main site

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aminoacid said:

I think the maps are being cached but I cannot figure out where in the code this happens. The jSQL Library is included in the project but I don't see anywhere it is used. Removing the library reference has no effect on the compilation so the maps are not being stored in an SQL DB for sure.

This is the reason why I posted my question (post #96) to @spsp

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miladfakhrizade said:

Thank you for your work spsp

Can .Pbf files be displayed on the map?

spsp

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