[QGIS-Developer] Exploring the new node tool: questions and bugs(?)

Régis Haubourg regis.haubourg at gmail.com
Thu Jun 8 01:53:36 PDT 2017

Hi all,
the new node tool has an unofficial name : "click-click node tool".

The new behavior is to first click a node to select it and then click the
new position.

I was also surprised at start, loosing the very common click - drag -
release workflow was not natural to me, coming from Esri-Mapinfo world (a
long time ago now).

After using it in Martin's plugin prototype "CAD Node tool" I finally got
convinced that it is a lot more productive in fact, and allows to use all
the advanced digitizing options and modifiers.

The node panel is raised on demand using right click, this was annoying to
always have it before. In latest master, it indeed is broken, it just opens
and closes immediately.

It's true that the new behavior is more natural to CAD users than GIS at
start, but I think it's much more productive this way.

Double click is still here to create a node, or you can just click on the
centerline virtual node that appears when you hover the feature. (It's a
red cross rubber band)

Moving a segment is like before but still in clic-clic mode, not

There are also some other improvements asked by some users, and any
improvement or feedback is welcome:

- add a varying symbol to confirm what snapping type is made (segment /
node / vertex)
- add a better batch vertex selection method, allowing to select all
vertices between two selected vertices
- allow to have priorities for layer snapping
- add advanced option to let user explicitly choose which layer and feature
should be actually snapped to.

I think this change is a heavy new feature that will need to be advertised
and documented .
I'm even wondering if we shouldn't even change the node tooltip until 3.2
from "node tool" to "node tool  /n new behavior, look check the doc!"


2017-06-08 8:40 GMT+02:00 Richard Duivenvoorde <rdmailings at duif.net>:

> On 07-06-17 15:59, DelazJ wrote:
> > Hi,
> > I'm using the new digitizing system to do a work and despite my trials,
> > I fail to find how to do some things and have some questions:
> >
> > - Is the node editor panel gone forever? Or is it hidden, in which case
> > how can I enable it?
> >
> > - Trying to add a vertex on a existing segment, I double-click the
> > segment at the place I'd like the new vertex but nothing seems to
> > happen. And when I move the mouse, there is also a (new) vertex being
> > moved. I fail to simply add the vertex without moving it (it adds it and
> > catches it, I presume). Am I doing something wrong?
> >
> > - Click and drag  helps to select many vertices from different features.
> > But when I I have some features selected, I think one would expect to
> > have only vertices of the selected features. Otherwise, selecting vertex
> > on a common boundary becomes a pain, because you neve know which feature
> > has its vertex selected.
> >
> > Are there issues/features request I should report in Redmine? Anyone to
> > help me find the right ways to do my edits, please?
> Hi Harrisou,
> I'm with you, seeing the 'Improved geometry editing' section in Anita's
> blog [0], I thought to test this too.
> But (with me on Linux) I fail to get things done too. It looks like I
> have to click on nodes before I can move them? While in webmaps (to
> which Anita compares the editing), you just hover over them, and if you
> see the cross or resized node, you can just drag them (without clicking
> it first).
> With me (on Linux) build of yesterday, this does not work, I get a blue
> rectangle/rubberband all the time, but fail to move points untill I
> click on them?
> Maybe somebody can share a little screencapture/movie about it?
> Regards,
> Richard
> [0]
> https://anitagraser.com/2017/05/23/upcoming-qgis3-features-
> exploring-the-current-developer-version/
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