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Maniphest T47863

Grease Pencil - draw in 2nd 3d view
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version: 2.77 (sub 0), branch: master, commit date: 2016-03-18 12:34, hash: 22a2853, type:
win 10

Split the 3d view in order to obtain a second 3d view. In the Grease Pencil tab, select "Draw". In the first view, you will able to draw. However if you try to draw in the second view (press Draw before again), after pressing LMB, draw mode will immediately stop. This phenomenon only occurs when using the Draw button. When using the keyboard and holding "D" everything works fine.

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Event Timeline

No One (blackno666) created this task.Mar 20 2016, 10:26 PM
No One (blackno666) assigned this task to Joshua Leung (aligorith).
No One (blackno666) raised the priority of this task from to 90.
No One (blackno666) updated the task description. (Show Details)
No One (blackno666) added a project: BF Blender.
No One (blackno666) edited a custom field.
No One (blackno666) added a subscriber: No One (blackno666).
perfection cat (sindra1961) added a subscriber: perfection cat (sindra1961).Mar 21 2016, 2:54 AM

I can not reproduce this here.

windows 10 pro 64bits
Blender 2.77 (Build Mar 21 Hash 2683dd8)

Alex (SpectreFirst) added a subscriber: Alex (SpectreFirst).Mar 21 2016, 11:07 AM

It seems that I can easily reproduce this issue, but I’m not sure if this is actually a bug or not:

  1. Open Blender and drag the upper right corner of the 3D View window to make it split into two 3D View windows.
  2. Switch Tool Shelf of the LEFT 3D View to the Grease Pencil tab, press Draw button and draw something within the LEFT 3D View, everything will work as expected.
  3. If you switch Tool Shelf of the RIGHT 3D View to the Grease Pencil tab, press Draw button and draw something within the RIGHT 3D View, everything will work as expected as well.
  4. Now press Draw button of the LEFT 3D View and try to draw something within the RIGHT 3D View and you won’t be able to do it. This works vice versa as well – if you’ll press Draw button of the RIGHT 3D View and try to draw within LEFT 3D View, it will just switch the tool off.
  5. Using a draw hotkey works within both windows as expected.
No One (blackno666) added a comment.Mar 21 2016, 12:03 PM

I can follow Alex's point of view. However, if I have two 3d views open (and two grease pencil tabs) and I change for example the stroke placement or enable editing, the buttons are synchronized. So I would expect the behaviour to be the same for Draw, Erase, Line and Poly.

I noticed that when I change the sculpt mode in my first view, the button in the second view is only updated after I hover with the mouse over it. This (imho) is a bug.

Joshua Leung (aligorith) changed the task status from Unknown Status to Archived.Mar 22 2016, 12:55 AM

Not really a bug.

The current behaviour makes it possible to exit continuous drawing mode when using a tablet only (with no easy access to a keyboard), we made it so that clicking anywhere outside the active area would immediately exit the GPencil drawing operator.

IMO, it should be pretty clear that drawing is only allowed in the area/editor where drawing was initiated from - e.g. note only the header of the area where drawing is enabled shows the help text, and also how only the area you started in actually updates in realtime (i.e. the other one only updates when the stroke is finished).

Drawing by holding down the DKEY of course works fine, as you have to be in your intended view to draw.