I am learning how to add Leafletjs map to an GUI and how to use JS to do it. I need to disable left and right mouse button panning or dragging.
Issue
I can disable all panning or dragging by using map.dragging.disable()
outside the event listener, but I cannot disable just the left button and right button panning. My guess is that I am not catching the correct event or my if statment is not working.
Any guidance or help will be appreciated
Expected behavior
I want to disable panning using the left or right button of the mouse, but keep on panning with the middle mouse button.
What I have tried so far
var map;
function initialize(){
// ADD MAP
map = L.map('map',{zoomSnap: 0, zoomControl: false, preferCanvas: true, inertia: false, doubleClickZoom: false, wheelPxPerZoomLevel: 30});
//GET TILE
L.tileLayer('https://mt1.google.com/vt/lyrs=r&x={x}&y={y}&z={z}',
{
attribution: 'Map data © <a href="http://openstreetmap.org">OpenStreetMap</a> contributors, <a href="http://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA</a>, Imagery © <a href="http://cloudmade.com">CloudMade</a>',
maxZoom: 10000, reuseTiles: true, unloadInvisibleTiles: true
}
).addTo(map);
// DISABLE RIGTH CLICK MENU
document.addEventListener('contextmenu', event => event.preventDefault());
// DISABLE LEFT AND RIGHT PANNIG
document.addEventListener('mousemove', (e) => {
// e.button === 0: the left button is clicked
// e.button === 1: the middle button is clicked
// e.button === 2: the right button is clicked
// e.button === 3: the `Browser Back` button is clicked
// e.button === 4: the `Browser Forward` button is clicked
if (e.button != 1) {
map.dragging.disable();
} else {
map.dragging.enable();
}
}
);
// ADD SCALE
var scale = L.control.scale();
scale.addTo(map);
//SET BOUNDS
var southWest = new L.LatLng(-2.9125325724709503,-79.03575842000764),
northEast = new L.LatLng(-2.9112682582356557,-79.03332932221451),
bounds = new L.LatLngBounds(southWest, northEast);
map.fitBounds(bounds, {padding: [0, 0]});
// ADD REFERENCES
L.marker([-2.9116417526879506,-79.0357487930094]).addTo(map);
L.marker([-2.9119463620853674,-79.0349189315595]).addTo(map);
L.marker([-2.9124030520806627,-79.03362467818663]).addTo(map);
L.marker([-2.915692679208955,-79.02077600732176]).addTo(map);
// PyQt5 SIGNAL
new QWebChannel(qt.webChannelTransport, function (channel) {
window.MainWindow = channel.objects.MainWindow;
if(typeof MainWindow != 'undefined') {
var onMapMove = function()
{
MainWindow.onMapMove(map.getBounds().getWest(), map.getBounds().getNorth(), map.getBounds().getSouth(), map.getBounds().getEast())
};
map.on('move', onMapMove);
onMapMove();
}
});
}
Solution
For anybody just learning JS like me, the website @IvanSanchez suggested was helpfull, this is the code that solve it for me. (developer.mozilla.org/en-US/docs/Web/API/MouseEvent/button) developer.mozilla.org/en-US/docs/Web/API/MouseEvent/buttons
The logic behind it was:
Every time button 0 or 2 is pressed (mousedown) it disables the map panning, but then when it comes back up (mouseup) the map panning is enabled again.
// e.button === 0: the left button is clicked
// e.button === 1: the middle button is clicked
// e.button === 2: the right button is clicked
// e.button === 3: the `Browser Back` button is clicked
// e.button === 4: the `Browser Forward` button is clicked
// DISABLE LEFT AND RIGHT PANNIG
document.addEventListener('mousedown', (e) => {
if (e.button != 1) {map.dragging.disable();}
}
);
document.addEventListener('mouseup', (e) => {
if (e.button != 1) {map.dragging.enable();}
}
);