3D View Editor Header > Select > Similar > Normal - Operator Panel Update Bug? #40934

New Issue

Terry Wallwork · 2014-07-03T10:49:16+02:00

Terry Wallwork commented

2014-07-03 10:49:16 +02:00

System Information
Operating system and graphics card

Blender Version
Broken: (example: 2.69.7 4b206af, see splash screen)
Worked: (optional)

Short description of error

Exact steps for others to reproduce the error
Based on a (as simple as possible) attached .blend file with minimum amount of steps

I am using Blender GIT REV 2014-07-02-09-31-14-b6e0dc2 on a Fedora 20 Linux 64 Bit Box with an intel 3000HD GFX
card.

I noticed that when using the [3D View Editor Header > Select > Similar > Normal] tool that if while using
the tool I switched the Selection Mode sometimes the Select Similar Operator Panel Type Control when
Select Normals is being used would go blank and I would have to hover the mouse over the control to get it to
display properly, the reverse also sometimes happens the Type Normal would be displayed I would hover over
and then it would dissapear.

In the attached Blend file I have a torus with some vertice selected if
I use [3D View Editor Header > Select > Similar > Normal] tool while in Vertex Selection Mode and switch
selection mode to Face or Edge, the Normal entry will not update.

Attached my system-info.txt and Blend demo File and video showing problem.

system-info.txt
3DViewEditor-Select-Similar-OperatorPanelUpdateBug_.blend
SelectSimilarOperatorPanelUpdateBug.webm

**System Information** Operating system and graphics card **Blender Version** Broken: (example: 2.69.7 4b206af, see splash screen) Worked: (optional) **Short description of error** **Exact steps for others to reproduce the error** Based on a (as simple as possible) attached .blend file with minimum amount of steps I am using Blender GIT REV 2014-07-02-09-31-14-b6e0dc2 on a Fedora 20 Linux 64 Bit Box with an intel 3000HD GFX card. I noticed that when using the [3D View Editor Header > Select > Similar > Normal] tool that if while using the tool I switched the Selection Mode sometimes the Select Similar Operator Panel Type Control when Select Normals is being used would go blank and I would have to hover the mouse over the control to get it to display properly, the reverse also sometimes happens the Type Normal would be displayed I would hover over and then it would dissapear. In the attached Blend file I have a torus with some vertice selected if I use [3D View Editor Header > Select > Similar > Normal] tool while in Vertex Selection Mode and switch selection mode to Face or Edge, the Normal entry will not update. Attached my system-info.txt and Blend demo File and video showing problem. [system-info.txt](https://archive.blender.org/developer/F96536/system-info.txt) [3DViewEditor-Select-Similar-OperatorPanelUpdateBug_.blend](https://archive.blender.org/developer/F96537/3DViewEditor-Select-Similar-OperatorPanelUpdateBug_.blend) [SelectSimilarOperatorPanelUpdateBug.webm](https://archive.blender.org/developer/F96538/SelectSimilarOperatorPanelUpdateBug.webm)

Terry Wallwork commented

2014-07-03 10:49:16 +02:00

Changed status to: 'Open'

Terry Wallwork commented

2014-07-03 10:49:16 +02:00

Added subscriber: @TerryWallwork-1

Lukas Tönne commented

2014-07-03 17:38:09 +02:00

Changed status from 'Open' to: 'Archived'

Lukas Tönne closed this issue

2014-07-03 17:38:09 +02:00

Lukas Tönne self-assigned this 2014-07-03 17:38:09 +02:00

Lukas Tönne commented

2014-07-03 17:38:09 +02:00

Two things here:

The available 'Action' options depend on the selected element type (which is not part of the operator settings, but the general tool settings). The items for each element type are generally incompatible: when you select a different element type the previous Action becomes meaningless. This might be solved by resetting the action to a default when the previous selection becomes invalid, but i doubt this is feasible for the redo panel, because the operator is not actually executed. Leaving the Action undefined is not per-se broken, at least it indicates the incompatibility to the user.
When the element selection is changed, the redo panel is not immediately redrawn. This would require intricate knowledge about the fact that the operator items depend on the context and is just not possible with the current notifier system. Having a context-dependent enum property like that in an operator may be convenient for coding, but solving such details in the UI is quite tricky. Effectively these are 3 different operators squeezed into 1, which is always difficult.

The issue does not seem severe enough to require fixing, after all no damage is done and after the first attempt of redoing (which cancels due to invalid Action), the panel is redrawn and the issue becomes visible.

Two things here: - The available 'Action' options depend on the selected element type (which is not part of the operator settings, but the general tool settings). The items for each element type are generally incompatible: when you select a different element type the previous Action becomes meaningless. This might be solved by resetting the action to a default when the previous selection becomes invalid, but i doubt this is feasible for the redo panel, because the operator is not actually executed. Leaving the Action undefined is not per-se broken, at least it indicates the incompatibility to the user. - When the element selection is changed, the redo panel is not immediately redrawn. This would require intricate knowledge about the fact that the operator items depend on the context and is just not possible with the current notifier system. Having a context-dependent enum property like that in an operator may be convenient for coding, but solving such details in the UI is quite tricky. Effectively these are 3 different operators squeezed into 1, which is always difficult. The issue does not seem severe enough to require fixing, after all no damage is done and after the first attempt of redoing (which cancels due to invalid Action), the panel is redrawn and the issue becomes visible.

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3D View Editor Header > Select > Similar > Normal - Operator Panel Update Bug? #40934