QT5 minimum map using QML

[alexfish]

Hi Joe

have not tested , looks like can create read file HERE
BR
Alex

[alexfish]

Hi Joe
image2seamap
have done qml map image2seamap image
Self test done and it does work
only one image is added so no increase in data beyond the one
that depends on the bacon append working ?
For Areas Covered by openseamaps look HERE
this method can get likes of USA and Mexico sea picky and more

HOME$ = GETENVIRON$("HOME")
' may have to change this depends on QtLocation Version
SEARCHDIR$ = HOME$ & "/.cache/QtLocation/5.8/tiles/osm/"
PRINT SEARCHDIR$
datafile$ = SEARCHDIR$ & "data.txt"
' File seamap_converter.bac qml maps images
OPTION PARSE FALSE
'===========================================
PRAGMA LDFLAGS `pkg-config   --libs gdk-pixbuf-2.0`
PRAGMA OPTIONS `pkg-config --cflags gdk-pixbuf-2.0`
'===========================================
PRAGMA INCLUDE <gdk-pixbuf-2.0/gdk-pixbuf/gdk-pixbuf.h>
SUB COMPOSIT_IMAGE(SOURCER$ , DESTINATION$)

LOCAL im1 , im2 TYPE GdkPixbuf*
im1 = gdk_pixbuf_new_from_file(DESTINATION$ , NULL)
im2 = gdk_pixbuf_new_from_file(SOURCER$, NULL)

w = gdk_pixbuf_get_width(im2)
h = gdk_pixbuf_get_height(im2)
IF w = -1 THEN

ELSE
gdk_pixbuf_composite(im2, im1, 0, 0, w, h, 0,0, 1,1, 0,255)
gdk_pixbuf_save (im1,DESTINATION$, "png", 0, NULL, NULL, NULL)

END IF
g_object_unref(im1)
g_object_unref(im2)
END SUB

SUB UPDATE(int rebuild)

myfile$ = WALK$(SEARCHDIR$, 1, ".+", TRUE, NL$)

data$ = "lost"
IF ( FILEEXISTS(datafile$) AND (rebuild) ) THEN
DELETE FILE datafile$
END IF
OPEN datafile$ FOR APPENDING AS myfile
IF FILELEN(datafile$) THEN
data$ = LOAD$(datafile$)
END IF

FOR item$ IN myfile$ STEP NL$
IF INSTR(item$,".png") THEN
F1$= REPLACE$(MID$(MID$(item$,INSTR(item$,"-")),6),"-","/")

TILE$ ="http://t1.openseamap.org/seamark/" & F1$

IF INSTR(data$,TILE$) THEN
PRINT "NoCON"
ELSE
Cmd$ =  "wget " & TILE$ & " -O " & SEARCHDIR$ & "source.png"
SYSTEM(Cmd$)
WRITELN TILE$ TO myfile

scr$ =SEARCHDIR$ & "source.png"

IF FILEEXISTS(scr$) THEN
PRINT TILE$
PRINT scr$
PRINT item$
COMPOSIT_IMAGE(scr$,item$)
DELETE FILE scr$
PRINT "========================================="
END IF
END IF
END IF

NEXT
CLOSE FILE myfile
PRINT " DONE"

END SUB

'0 just update 1 rebuild
UPDATE(0)

BR
Alex

Attachments:

[bigbass]

Thanks Alex

for the way to update the maps
to use image2seamap
and all you code snippets and links

*maybe a one image screen shot before and after
to show the changes to see the expected result?

Joe

[bigbass]

Hello Alex and all

well here is a command line way
to enter an address and get a gps lat lon location

Is it possible get the coordinates(latitude and longitude), of a geo location using just the geo address (country, state, city, street, etc...)?

expected result
-------------------
Qt Version:
5.15.2
Try service: OSM
Searching...
Reply:
location returned.
Lat.:
28.2897
Long.:
-81.4067
-----------------


may come in handy after more
testing

I spent a lot of time reducing this down
and porting it to linux and bacon
almost gave up a few times on this one
wasn't easy but I wanted to get a demo for it
take a look at the callback QObject::connect
in the original code spans many lines without a real callback!

in c++ they use signal and slots the slot
was 30 lines of code instead of using a function or sub

stackoverflow.com/questions/43259557/how-to-get-latitude-longitude-from-one-geo-address-using-qt-c-on-windows



' Qt header:
PRAGMA INCLUDE <QCoreApplication> <QGeoAddress> <QGeoCodingManager>
PRAGMA INCLUDE <QGeoCoordinate> <QGeoLocation> <QGeoServiceProvider>
PRAGMA INCLUDE  <QtCore> <QDebug>
PRAGMA LDFLAGS -lQt5Location -lQt5PositioningQuick
PRAGMA LDFLAGS -lQt5Quick  -lQt5Gui -lQt5Positioning -lQt5QmlModels
PRAGMA LDFLAGS -lQt5Qml -lQt5Network -lQt5Core
PRAGMA LDFLAGS -lpthread -latomic

PRAGMA COMPILER g++
PRAGMA OPTIONS -fPIC -Wno-write-strings -Wno-pointer-arith  -lpthread -latomic  

'RPI3 and 4
PRAGMA OPTIONS -I.
PRAGMA OPTIONS -I/usr/lib/arm-linux-gnueabihf
PRAGMA OPTIONS -I/usr/include/arm-linux-gnueabihf/qt5
PRAGMA OPTIONS -I/usr/include/arm-linux-gnueabihf/qt5/QtCore
PRAGMA OPTIONS -I/usr/include/arm-linux-gnueabihf/qt5/QtGui
PRAGMA OPTIONS -I/usr/include/arm-linux-gnueabihf/qt5/QtQml
PRAGMA OPTIONS -I/usr/include/arm-linux-gnueabihf/qt5/QtQmlModels
PRAGMA OPTIONS -I/usr/include/arm-linux-gnueabihf/qt5/QtQuick
PRAGMA OPTIONS -I/usr/lib/arm-linux-gnueabihf/metatypes
PRAGMA OPTIONS -I/usr/include/arm-linux-gnueabihf/qt5/QtLocation
PRAGMA OPTIONS -I/usr/include/arm-linux-gnueabihf/qt5/QtPositioning
PRAGMA OPTIONS -I/usr/include/arm-linux-gnueabihf/qt5/QtWidgets

OPTION PARSE FALSE

DEF FN  PRINTOUT(x) =  qDebug()  << (x)


'--------------------------
SUB  ptrQGeoCode_cb
'--------------------------
 LOCAL qGeoLocs TYPE QList<QGeoLocation>

 PRINT "Reply: "  

 ' eval. result
 qGeoLocs = ptrQGeoCode->locations()
 
 PRINT "location returned."
 
 for (QGeoLocation &qGeoLoc : qGeoLocs) {
qGeoLoc.setAddress(addr)
QGeoCoordinate qGeoCoord = qGeoLoc.coordinate()

PRINT "Lat.:  "
PRINTOUT( qGeoCoord.latitude())
PRINT "Long.: "
PRINTOUT(qGeoCoord.longitude())
 }
 
 END
ENDSUB


PRINT "Qt Version: "
PRINTOUT( QT_VERSION_STR)


DECLARE app TYPE QCoreApplication*
DECLARE ptrQGeoCode TYPE QGeoCodeReply*
DECLARE addr TYPE QGeoAddress
DECLARE ptrQGeoCoder TYPE QGeoCodingManager*


' main application
 app = new QCoreApplication(argc, argv)
 PRINT "Try service:   OSM"

' force provider osm
QGeoServiceProvider qGeoService("osm")
QGeoCodingManager *ptrQGeoCoder = qGeoService.geocodingManager()
IF NOT (ptrQGeoCoder) THEN
 PRINT "GeoCodingManager  OSM"
 PRINT " not available!"
END IF
 
      'more options
      'addr.setState(QString::fromUtf8("state"))
      'addr.setStreet(QString::fromUtf8("road"))
      'addr.setDistrict(QString::fromUtf8("suburb"))
 
'use like html %20 is a space found out experimenting
addr.setCountry(QString::fromUtf8("United_States"))
addr.setPostalCode(QString::fromUtf8("44741"))
addr.setState(QString::fromUtf8("Florida"))
addr.setCity(QString::fromUtf8("Kissimmee"))
'--                               st.number  street   drive
addr.setStreet(QString::fromUtf8("69%20Lakeview%20Dr"))
ptrQGeoCode = ptrQGeoCoder->geocode(addr)

IF NOT (ptrQGeoCode) THEN
 EPRINT  "GeoCoding  failed!"
END IF

PRINT "Searching..."
'                widget     ------SIGNAL------------  callback
QObject::connect(ptrQGeoCode, &QGeoCodeReply::finished, ptrQGeoCode_cb)

return app->exec()






[alexfish]

Oct 1, 2022 20:03:53 GMT 1 bigbass said:

Thanks Alex

for the way to update the maps
to use image2seamap
and all you code snippets and links

*maybe a one image screen shot before and after
to show the changes to see the expected result?

Joe

Hi Joe
I ran the code over the directory , so can not prove the before
but can see from the picky which tile has been changed

Have tested the above code , all OK

BR
Alex

Attachments:

[alexfish]

Hi All

OK got this convert demo

have updated main.qml to qml3 :: added button , could be enhanced

how ever this allows not to track the gps signal : so can wonder where ever

here I get whitby uk in view; then do an update with the converter

See Code at above
image2seamap

BR
Alex
pickys +updated main3.qml

Attachments:

main3.qml.bz2 (1.83 KB)

[alexfish]

Hi Joe

Found a problem while testing:: default tile cache size
one will need to set this Else will need to re-run the convert to seamap
looks like this is a go by road & have internet connection etc etc: good job have internet with legs
bit of a data eater if not got unlimited data: If set the can put the while loop on
to redo from start delete the data.txt

Read HERE

sort of reminds me of a seamap app I have on android pad.

also can restrict the zoom levels

IE
     Map {
id:mapview
         anchors.fill: parent
         plugin: osmPlugin
minimumZoomLevel : 13
maximumZoomLevel: 17
         center: QtPositioning.coordinate(0,0)
         zoomLevel: 14
ADDED
main3.qml Updated:: whats the difference: check it out

BR
Alex

Attachments:

main3.qml.bz2 (1.96 KB)

[alexfish]

Hi Joe

found some info Re gpds ; qml has an interface HERE


bits of qml code :

 Map{
 id: mapview
   anchors.fill: parent;plugin:osmPlugin;minimumZoomLevel:13;maximumZoomLevel: 17; center: QtPositioning.coordinate (0, 0)
   zoomLevel:14


PositionSource {
   id:mySocket
   nmeaSource: "socket://127.0.0.1:2947"
   onPositionChanged:console.log("CHANGED")
}

if set the location 0,0
socket seems to connect
result
./dynamic-map
qml: CHANGED



further reading possible interface for reading external sources

BR
Alex

[bigbass]

Hello Alex

the last main3.qml looking good!

as for this line
nmeaSource: "socket://127.0.0.1:2947"

that led me down the road of sockets on the c++ side
of the code to connect to the qml side of the code and communicate

in short the way the code is working now we get around a complex setup
of doing it the "official way" of creating sockets for Qt
we do already have a socket reading the port using c++ on localhost
but it is not taking to Qt yet

stay away from any code that is for nokia
its a dead end in a long rabbit hole that if you did get it to work
you would need an api key anyway

this is why I stuck with the osm code and did geolocations
on a side note for all the good working demos
you need to compile qtlocation from git It took me several tries
to finally get that working and that solves all those "private" headers
that are nowhere to be found you have to build it!
that builds all the plugins for maps and the private headers needed

*I will at some point ( in a few days) start clean and document the steps for qtlocations
but I was adding stuff error for error solving until it compiled
and will pass it to a wiki page so that it can be repeated step by step
this was for qt 5.15.2

the good news we will be making leaps and bounds with the new demos
once ported over to bacon they solve all the complex connecting to the plugins !

Joe

[alexfish]

Hi Joe

Not taking all of that in ,will try to digest...

in mean time thought would try `pkg-config`

Up to now got below header working on pi4 , so wonder if some one could test dynamic-map on other os


PRAGMA INCLUDE <string.h> <stdio.h>  <libgpsmm.h> <math.h>  <iostream>
PRAGMA LDFLAGS -std=c++17 -Wall -pedantic -pthread -lgps
PRAGMA INCLUDE  <QGuiApplication> <QQmlApplicationEngine>
PRAGMA INCLUDE  <QtCore> <QDebug>  <QtCore/QTimer>

PRAGMA LDFLAGS `pkg-config  Qt5Location Qt5PositioningQuick Qt5Quick --libs`
PRAGMA LDFLAGS `pkg-config  Qt5Gui Qt5Positioning Qt5QmlModels --libs`
PRAGMA LDFLAGS `pkg-config  Qt5Qml Qt5Network Qt5Core --libs`

PRAGMA OPTIONS `pkg-config  Qt5Location Qt5PositioningQuick Qt5Quick --cflags`
PRAGMA OPTIONS `pkg-config  Qt5Gui Qt5Positioning Qt5QmlModels --cflags`
PRAGMA OPTIONS `pkg-config  Qt5Qml Qt5Network Qt5Core --cflags`

PRAGMA LDFLAGS -lpthread -latomic
PRAGMA OPTIONS -Wno-write-strings -Wno-pointer-arith -fPIC
PRAGMA OPTIONS -Wno-deprecated


PRAGMA COMPILER g++
OPTION PARSE FALSE
qputenv("QML_XHR_ALLOW_FILE_READ", QByteArray("1"))

DEF FN  PRINTOUT(x) =  qDebug()  << (x)

DECLARE app TYPE QGuiApplication*
DECLARE engine TYPE QQmlApplicationEngine*

also in mean time can have a bit of fun , understanding gps and how to identify which tile contains the position
+ standard osm format & qml format

DEF FN ASINH = asinh
DEF FN ATAN = atan
'radius at equater
DEF FN OSM_EQ_RADIUS =  6378137.0

' https://wiki.openstreetmap.org/wiki/Slippy_map_tilenames
' source$ server [a,b,c]

' get the tile x
FUNCTION LONG_TO_PIX(int ZOOM, double longditude) TYPE int
LOCAL TILE_X TYPE int
TILE_X = (int)(FLOOR(( longditude +180.0) /360 *(1 << ZOOM)))
RETURN TILE_X
END FUNCTION
'get the tile y
' =====================================================
FUNCTION LAT_TO_PIX(int ZOOM, double latitude) TYPE int

LOCAL TILE_Y TYPE int
LOCAL LAT_RAD TYPE double

LAT_RAD = latitude * PI / 180

TILE_Y = (int)FLOOR( (1.0 - ASINH(TAN(LAT_RAD)) / PI) / 2.0 * (1 << ZOOM))
RETURN TILE_Y

END FUNCTION
'where are we in the tile
' =====================================================
FUNCTION TILE_X_TO_LONG(int x, int z) TYPE double

RETURN x / (double)(1 << z) * 360.0 - 180

END FUNCTION

' =====================================================
FUNCTION TILE_Y_TO_LAT(int y, int z) TYPE double

LOCAL n TYPE double
n = PI - 2.0 * PI * y / (double)(1 << z)
RETURN 180.0 / PI * ATAN(0.5 * (exp(n) - exp(-n)))

END FUNCTION

' ======================================================
LOCAL longditude = -0.1278 TYPE double
LOCAL latitude = 51.5074 TYPE double
LOCAL zoom = 14

TILE_X = LONG_TO_PIX(zoom,longditude)
TILE_Y = LAT_TO_PIX(zoom,latitude)

PRINT "Pos=  lat : " , latitude, ":lon:" , longditude

PRINT "standard osm format : ";
PRINT "/", STR$(zoom),"/", STR$(TILE_X),"/",STR$(TILE_Y),".png"
PRINT "qml osm format : ";
PRINT "osm_100-l-1-",STR$(zoom),"-", STR$(TILE_X),"-",STR$(TILE_Y),".png"

PRINT " your tile is here "
LOCAL  X_LON_1  TYPE double
LOCAL  Y_LAT_1  TYPE double

X_LON_1  = TILE_X_TO_LONG(TILE_X,zoom)
Y_LAT_1 = TILE_Y_TO_LAT(TILE_Y,zoom)
PRINT " lat: " , Y_LAT_1 , ":lon:" , X_LON_1

If follow the link in code there  is
a ECMAScript (JavaScript/ActionScript, etc.) how to
BR
Alex

[bigbass]

I did this with an
App called Dall-e
An AI from words
I described

Joe

[bigbass]

Hello Alex
all the examples that were attached
in this thread

I ported them to Manjaro
the dependencies are different




qt5-declarative
qt5-location
gpsd
inetutils
qt5-quickcontrols
qt5-quickcontrols2


and even the script I used for the gps forwarding changed
the hostname command doesnt work the same
the ip is found doing
ifconfig wlan0 | grep -i mask | awk '{print $2}'| cut -f2

they are all here in this folder
sourceforge.net/projects/bacon-qt5/files/MANJARO/

[alexfish]

Hi Joe & All

gpsd:

I have tested a wifi gpsais device with gpsd
depending on the device check your docs/manual
may need to stop the gpsd use root
systemctl stop gpsd
systemctl stop gpsd.socket
then
tcp:conection example
gpsd tcp://192.168.1.100:2000
see if info available
gpspipe -r
in this case :: no picky or output
Joe do you connect phone through udp:
BR
Alex

[bigbass]

Hello Alex

"Joe do you connect phone through udp:"

yes

and tested on both debian and Manjaro to be working
but there is a difference in the getting of the local ip
due to the hostname command is not the same for Manjaro
but it is an easy fix

this script is named setup-gps for Manjaro
#!/bin/bash
#bash script by bigbass

sudo systemctl stop gpsd.socket
sudo killall -9 gpsd

MYIP=$(ifconfig wlan0 | grep -i mask | awk '{print $2}'| cut -f2 )

printf "now start your gpsd android app with ip \e[44m ${MYIP}\e[0m  \n"
printf "android app port  with  \e[44m 1101\e[0m  \n"


printf "I connected your raspberry pi using udp to \e[44m ${MYIP}:1101\e[0m   \n"
printf "open a new terminal and type \e[44m gpsmon\e[0m   \n"

gpsd -N udp://${MYIP}":1101"





all the details are here just to be complete
since it is spread over different posts

connecting your android phone to wifi
and sending you gps data to the raspberry pi
note this link is using debian
experimental-coding.freeforums.net/post/685

this link is a demo we both used (you modified for debian) ported to manjaro
I tested this to be working
sourceforge.net/projects/bacon-qt5/files/MANJARO/dynamic2.tar.bz2/download


hope something there could be useful
the connecting part to gspd should work
well with udp just change the port number

P.S forgot to say ifconfig is not installed by default it is in the package
net-tools

sudo pacman -S net-tools


BR
Joe

[alexfish]

Hi Joe

Thanks for the reply:

all info is useful , to me and others

at this side just touch down with first ais(mmsi)

bit of code

IF (gps_data.ais.mmsi) THEN
CLEAR
PRINT "\nAis mmsi: ",gps_data.ais.mmsi ,"\n"

END IF

not seem much but getting through all info from sub structs = daunting task , depend on this depends on that and if if that or blagh,blagh,blaght....

anyway: output, other info suppressed
Ais mmsi: 232030100

Fix mode:  3D Time:
BR
Alex