Some icons cannot be overriden from python (e.g. 'Constraint.mute', 'use_fake_user') #97909

New Issue

Demeter Dzadik · 2022-05-06T15:49:21+02:00

Demeter Dzadik commented

2022-05-06 15:49:21 +02:00

Blender Version
Broken: version: 3.3.0 Alpha, branch: master, commit date: 2022-05-06 11:54, hash: c7bffc8fa2
Worked: Looks like this was once working in 2.80 (but has stopped working in 2.81)

Short description of error
Some boolean properties apply an offset to their icon depending on the state of the boolean. This offset is applied even when an icon override is used, like so: UILayout.prop(icon=whatever).

Workaround

def get_icon_value(icon_name: str) -> int:
    icon_items = bpy.types.UILayout.bl_rna.functions["prop"].parameters["icon"].enum_items.items()
    icon_dict = {tup[1].identifier : tup[1].value for tup in icon_items}

    return icon_dict[icon_name]

def draw_with_icon_fix(layout, prop_owner, prop_name, icon: str, offset=1, invert_checkbox=False, **kwargs):
    """Drawing some booleans in the UI with a custom icon can be 
    annoying because Blender might offset the icon based on the boolean state.
    You can use this function to counter that offset. To find the offset, you have to 
    trial and error, it's either 1 or -1. (Or 0 but then you don't need this)
    """

    bool_value = getattr(prop_owner, prop_name)
    offset = offset * int(bool_value)
    if invert_checkbox:
        offset = 1 - offset
    icon_value = get_icon_value(icon) + offset
    layout.prop(prop_owner, prop_name, icon_value=icon_value, invert_checkbox=invert_checkbox, **kwargs)

Exact steps for others to reproduce the error

File with script within: icon_madness.blend
Script should self-execute, look for a "FixMe" panel in the sidebar.

So this file works in 2.80 and is broken in 2.81:
icon_madness_2.blend

**Blender Version** Broken: version: 3.3.0 Alpha, branch: master, commit date: 2022-05-06 11:54, hash: `c7bffc8fa2` Worked: Looks like this was once working in 2.80 (but has stopped working in 2.81) **Short description of error** Some boolean properties apply an offset to their icon depending on the state of the boolean. This offset is applied even when an icon override is used, like so: `UILayout.prop(icon=whatever)`. **Workaround** ```python def get_icon_value(icon_name: str) -> int: icon_items = bpy.types.UILayout.bl_rna.functions["prop"].parameters["icon"].enum_items.items() icon_dict = {tup[1].identifier : tup[1].value for tup in icon_items} return icon_dict[icon_name] def draw_with_icon_fix(layout, prop_owner, prop_name, icon: str, offset=1, invert_checkbox=False, **kwargs): """Drawing some booleans in the UI with a custom icon can be annoying because Blender might offset the icon based on the boolean state. You can use this function to counter that offset. To find the offset, you have to trial and error, it's either 1 or -1. (Or 0 but then you don't need this) """ bool_value = getattr(prop_owner, prop_name) offset = offset * int(bool_value) if invert_checkbox: offset = 1 - offset icon_value = get_icon_value(icon) + offset layout.prop(prop_owner, prop_name, icon_value=icon_value, invert_checkbox=invert_checkbox, **kwargs) ``` **Exact steps for others to reproduce the error** - File with script within: [icon_madness.blend](https://archive.blender.org/developer/F13054802/icon_madness.blend) - Script should self-execute, look for a "FixMe" panel in the sidebar. ![image.png](https://archive.blender.org/developer/F13054803/image.png) So this file works in 2.80 and is broken in 2.81: [icon_madness_2.blend](https://archive.blender.org/developer/F13054848/icon_madness_2.blend)

Demeter Dzadik commented

2022-05-06 16:08:22 +02:00

Found a workaround, added to the task description.

Philipp Oeser commented

2022-05-06 16:27:57 +02:00

Can confirm.
Looks like this was once working in 2.80 (but has stopped working in 2.81)

Can confirm. Looks like this was once working in 2.80 (but has stopped working in 2.81)

Philipp Oeser commented

2022-05-06 16:30:14 +02:00

Could it additionally be related to #93987?
So mute vs enabled?

Could it additionally be related to #93987? So `mute` vs `enabled`?

Philipp Oeser commented

2022-05-06 16:33:22 +02:00

In #97909#1353217, @lichtwerk wrote:
Can confirm.
Looks like this was once working in 2.80 (but has stopped working in 2.81)

So this file works in 2.80 and is broken in 2.81:
icon_madness_2.blend

> In #97909#1353217, @lichtwerk wrote: > Can confirm. > Looks like this was once working in 2.80 (but has stopped working in 2.81) So this file works in 2.80 and is broken in 2.81: [icon_madness_2.blend](https://archive.blender.org/developer/F13054848/icon_madness_2.blend)

Philipp Oeser removed the

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Some icons cannot be overriden from python (e.g. 'Constraint.mute', 'use_fake_user') #97909