[GIS] Is it possible to not show node in editing mod QGIS

editingqgisvector

I actually have a plugin that allows me to draw on a vector layer (I made it based on the FreeHand Editing Plugin). When a mouseMoveEvent is detected, it creates a new point on the vector layer and create a line between it and the last point created. My problem is that I want to show in editing mod only the lines and not the nodes. Does anybody know if this is possible?

EDIT:

This is not what I meant, sorry if you didn't understand well, I'll explain better.

I have a vector layer (and an option in my plugin to create one)
In edit mod, I can freely draw lines with the mouse on this vector (the lines will correspond to the drawing, check the screenshot below when it's not in editing mod).

QGIS Lines

The problem is that in editing mod, I don't want to display the nodes cross image (check screenshot below) on the screen like it actually is, I just want to show the lines like how it is in non-editing mod

GIS Lines and Nodes

Best Answer

There is a way to do what you want and not display the nodes in editing mode, or to actually only display the nodes for selected vertices.

Go into Settings/Options/Digitizing and then you will see a section called Vertex markers. This is where you can customize the nodes by selecting to only show them for selected features, change the size, change the shape (from x's to transparent circles or completely off.

You have probably found this solution already by now, but it might help others like me who have been searching for the same thing and stumbled upon it...

Related Solutions

QGIS Python Plugin – Speed of Editing Attributes in QGIS Using a Python Plugin

The problem was, that each call to QgsDataProvider.changeAttributeValues() initiates a new transaction with all the related overhead (depending on the data provider and system configuration)

When the features are changed on the layer first (as in QgsVectorLayer.changeAttributeValue() ) all the changes are cached in memory, what is much faster and are then committed in one single transaction in the end.

The same buffering can be achieved within the script, (i.e. outside of the vector layer edit buffer) and then committed in one transaction by calling QgsDataProvider.changeAttributeValues() once, outside of the loop.

There is also a handy shortcut for this in recent QGIS versions:

with edit(layer):
    for fid in fids:
        layer.changeAttributeValue(fid, idx, value)

[GIS] How to edit an existing layer using leaflet

Thanks to the help of @user1919 who pointed me to the solution proposed in Stackoverflow, I could edit the existing layer with the plugin Leaflet.draw without customizing it ( at least not it's code ).

The edits now are made on the onEachFeature function in the L.geoJSON call like this:

var selectedFeature = null;
function handleJson(data) {
    geojsonlayer=L.geoJson(data, {
        onEachFeature: function (feature, layer) {
            group.addLayer(layer);
            layer.on('click', function(e){
                if(selectedFeature){
                    selectedFeature.editing.disable();
                    // and Here I'll add the code to store my edited polygon in the DB or whatever I want to do with it
                }
                selectedFeature = e.target;
                e.target.editing.enable();
            });
        }
    }).addTo(group);
}

and so there is no need to use the edits from the menu in Leaflet.draw control

Now to use the Leaflet.draw control I had to add to the drawnItems, which is the editable layer defined in Leaflet.draw control, the feature which I selected. It looks like this :

drawnItems.addLayer(e.target);

and define drawnItems in the edit of the Leaflet.draw control like this :

var drawControl = new L.Control.Draw({
    edit: {
        featureGroup: drawnItems
    }
});

Best Answer

Related Solutions

QGIS Python Plugin – Speed of Editing Attributes in QGIS Using a Python Plugin

[GIS] How to edit an existing layer using leaflet

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