[Question] does not display custom icon

[PavelBlend]

Hello.
I have a question: under what circumstances should the custom icon be displayed?
Once I launched a blender and saw a custom icon in the Physics tab, which is on the flip_fluids_addon\icons\ path.
But it was once and more I did not see him.
Whenever I start a blender, I see the standard icon in the form of a drop.

[rlguy]

Hey PavelBlend,

The custom icon should always be displayed on the button:

Unless it is enabled on an object, then it will show X:

---

If you are not seeing the custom icon, then there might have been a problem when the addon loads the icon. I noticed a small problem in the code, but it did not affect how my icon loads.

Would you be able to replace your flip_fluids_addon/properties/flip_fluid_properties.py file with this modified version:

flip_fluids_addon/properties/flip_fluid_properties.py

And then open Blender and let me know what is shown in the system console (Blender > Window > Toggle System Console) and if the custom icon is displayed. The modified file might output some information that looks like this:

Read prefs: C:\Users\ryanl\AppData\Roaming\Blender Foundation\Blender\2.79\config\userpref.blend
found bundled python: C:\Program Files\Blender Foundation\Blender\2.79\python
DEBUG #427:  Loading custom icon
DEBUG #427:  Icon path C:\Users\ryanl\AppData\Roaming\Blender Foundation\Blender\2.79\scripts\addons\flip_fluids_addon\icons\flip_fluids_logo.png
DEBUG #427:  Icon exists True
DEBUG #427:  Icon name 'flip_fluids_logo'
DEBUG #427:  Icon object <bpy_struct, ImagePreview at 0x00000235389D4278>
DEBUG #427:  Icon value 900
DEBUG #427:  Icon retrieve <bpy_struct, ImagePreview at 0x00000235389D4278>

[PavelBlend]

I am using version 9.0.5.3.
I copied your file and the console does not display anything (since the self.is_custom_icons_loaded variable is always True for me).
Then I modified your code and the icon appeared.
I sent you a modified file by mail (the one you used when searching for beta testers).
I do not know why your code does not work.
I just noticed that the self.is_custom_icons_loaded variable doesn't change, and I took it out of the class.

[rlguy]

Hey PavelBlend,

Thanks for the update! I understand the problem now and was able to reproduce the issue of the custom icon not loading.

The self.is_custom_icons_loaded variable could be saved into the .blend file as True with File > Save Startup File. For the code to work, the is_custom_icons_loaded variable needs to always be False when Blender is loaded which is why it works as a global variable.

I have changed how the icon is loaded. I have removed the variable and the addon will now always load/reload the icon when Blender starts up or when a scene is loaded. This fix will be included in the next update (v1.0.5).

- Ryan