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Tasklist

FS#769 - Show nodes of polyline when selected

Attached to Project: QCAD
Opened by Christian Aigner (caigner) - Wednesday, 20 February 2013, 09:02 GMT+2
Last edited by Andrew (andrew) - Monday, 16 December 2013, 13:41 GMT+2
Task Type Feature Request
Category Main
Status Closed
Assigned To Andrew (andrew)
Operating System All
Severity Low
Priority Normal
Reported Version 3.0.0
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 2
Private No

Details

I have a straight polyline with several segments and want to remove some nodes. So I choose “Delete Node(s)”. Then I am asked to select the polyline. When done I can start clicking on the nodes I want to remove - IF ONLY I could see them.

Request: Would be nice if you could make the nodes of the selected polyline visible. Or don’t ask again for selecting a polyline if it was already selected before the tool was chosen.

Currently the workaround is to first select the polyline (which shows the nodes), then choose the tool, then AGAIN select the polyline and then start clicking on the nodes.

This task depends upon

Closed by  Andrew (andrew)
Monday, 16 December 2013, 13:41 GMT+2
Reason for closing:  Won't implement
Comment by -- (clive) - Friday, 22 February 2013, 11:31 GMT+2

Yes I agree with you, after the 'choose polyline' prompt the polyline should highlight showing the nodes.

I personally think this may be a bug here!

@Andrew - is this a bug?

Comment by Andrew (andrew) - Friday, 22 February 2013, 11:55 GMT+2

@Clive: It's a consistency thing that might not be obvious but probably makes sense after having a closer look:

Tools should never change the current selection unless:
- they are selection tools
or
- they are modification tools which delete entities or create new entities.

The tool to delete nodes of a polyline does not require a selection prior to using the tool. It has no connection at all to selected entities and should ignore the selection and leave it unchanged. Other tools in this category are: trim, round, etc. The user might use such tools while a selection exists. It is not desirable that this existing selection is changed by a tool that does not operate on a selection at all.

Polyline nodes (like any other reference points) are highlighted only when the polyline entity is selected. Choosing an entity for one single operation (delete nodes, trim, round, etc) is not the same as selecting an entity for a future operation.

@caigner

Would be nice if you could make the nodes of the selected polyline visible.

Note that the polyline it not necessarily selected - it is only chosen for one single operation.

Or don’t ask again for selecting a polyline if it was already selected before the tool was chosen

There might be several entities selected when this tool it used. This selection must remain unchanged.

Currently the workaround is to first select the polyline (which shows the nodes), then choose the tool, then AGAIN select the polyline and then start clicking on the nodes.

Correct terminology would be:

"First select the polyline (which shows the nodes), then choose the tool, then choose the polyline to work on and then start clicking on the nodes."
This is indeed the way to go if your polyline nodes are not obviously visible (i.e. sharp corners).

Comment by -- (clive) - Friday, 22 February 2013, 15:15 GMT+2

Thanks for the explanation Andrew.

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