pyqtlet2

pyqtlet2

pyqtlet is a Leaflet map wrapper for Qt bindings. In construction and design, it mimics the official leaflet api as much as possible.

About

This is a fork of the repository pyqtlet from @skylarkdrones. Since the original repository is not further maintained. Since I find this package very useful for a map implementation in the QT environment, I want to further develop this package. If you want to extend this package feel free to get in contact with me or create an Issue/Pull Request with a change!

Installation

You as a user need to specify the Qt package you want to use. Please check qtpy to find out which Qt bindings can be used.

pip3 install "pyqtlet2[PyQt5]"
# or
pip3 install "pyqtlet2[PySide6]"

If you have multiple Qt bindings installed in your environment, please specify the necessary environment variable inside your code.

import os
os.environ['QT_API'] = 'pyqt5'
from qtpy import QtGui

Check if the installation was successful:

# To test whether it is successfully working
python3 
>>> from pyqtlet import L, MapWidget
>>> # No errors

Usage

import os
import sys
os.environ['QT_API'] = 'pyqt5'
from qtpy.QtWidgets import QApplication, QVBoxLayout, QWidget
from pyqtlet2 import L, MapWidget


class MapWindow(QWidget):
    def __init__(self):
        # Setting up the widgets and layout
        super().__init__()
        self.mapWidget = MapWidget()
        self.layout = QVBoxLayout()
        self.layout.addWidget(self.mapWidget)
        self.setLayout(self.layout)

        # Working with the maps with pyqtlet
        self.map = L.map(self.mapWidget)
        self.map.setView([12.97, 77.59], 10)
        L.tileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png').addTo(self.map)
        self.marker = L.marker([12.934056, 77.610029])
        self.marker.bindPopup('Maps are a treasure.')
        self.map.addLayer(self.marker)
        self.show()

if __name__ == '__main__':
    app = QApplication(sys.argv)
    widget = MapWindow()
    sys.exit(app.exec_())

Additional Leaflet Packages

• Leaflet.draw (Version 0.4.14) - https://github.com/Leaflet/Leaflet.draw
• Leaflet.RotatedMarker (Version 0.2.0) - https://github.com/bbecquet/Leaflet.RotatedMarker

Using Unimplemented Leaflet Features

At this time, there is none actively adding features to pyqtlet. This means that there are a lot of Leaflet features that are not implemented in pyqtlet. However, there is still a way to access these features via the runJavaScript api. This allows arbitrary code to be run within the map window.

For example, if we want to change the marker icon in the above example, add the following 2 lines of code after the self.map.addLayer(self.marker) statement.

        # Create a icon called markerIcon in the js runtime.
        self.map.runJavaScript('var markerIcon = L.icon({iconUrl: "https://leafletjs.com/examples/custom-icons/leaf-red.png"});')
        # Edit the existing python object by accessing it's jsName property
        self.map.runJavaScript(f'{self.marker.jsName}.setIcon(markerIcon);')

This technique will allow users to use all the features available in leaflet.

Contributors

A big thank you, goes to all the contributors of this project!

Contributing

In terms of contributing, there is a lot of work that still needs to be done. Specifically, there are a lot of leaflet features that need to be ported into pyqtlet. All contributions welcome.