[QGIS-trac] [Quantum GIS] #3314: Node tool does not allow multiple-selection when geometry is invalid

[Quantum GIS]

#3314: Node tool does not allow multiple-selection when geometry is invalid
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   Reporter:  Alister                                          |              Owner:  nobody       
       Type:  bug                                              |             Status:  new          
   Priority:  minor: annoyance                                 |          Milestone:  Version 1.7.0
  Component:  Digitising                                       |            Version:  Trunk        
   Keywords:  Node tool, invalid geometry, multiple-selection  |   Platform_version:  XP           
   Platform:  Windows                                          |           Must_fix:  No           
Status_info:  0                                                |  
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 To reproduce:

 - Select a polygon layer and click the edit button

 - Try to select multiple nodes using Ctrl-click.  It should work.

 - Using the node tool, move some nodes so that the polygon border crosses
 itself.  A green x should be displayed at the intersection.

 - Try to select multiple nodes using Ctrl-click.  It won't work.

 I can't see any reason why it is desirable for multiple-selection to be
 disabled when the geometry is invalid.  The user may want to fix it by
 selecting multiple-nodes and deleting (or moving) them.

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Ticket URL: <https://trac.osgeo.org/qgis/ticket/3314>
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