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# This sample script demonstrates how to place a custom icon on a button or
# menu entry.
#
# IMPORTANT NOTE: if you run this sample, there will be no icon in the button
# You need to replace the image path with a real existing one.
# For distributable scripts, it is recommended to place the icons inside the
# addon folder and access it relative to the py script file for portability
#
#
# Other use cases for UI-previews:
# - provide a fixed list of previews to select from
# - provide a dynamic list of preview (eg. calculated from reading a directory)
#
# For the above use cases, see the template 'ui_previews_dynamic_enum.py"
import os
import bpy
class PreviewsExamplePanel(bpy.types.Panel):
"""Creates a Panel in the Object properties window"""
bl_label = "Previews Example Panel"
bl_idname = "OBJECT_PT_previews"
bl_space_type = 'PROPERTIES'
bl_region_type = 'WINDOW'
bl_context = "object"
def draw(self, context):
layout = self.layout
pcoll = preview_collections["main"]
row = layout.row()
my_icon = pcoll["my_icon"]
row.operator("render.render", icon_value=my_icon.icon_id)
# my_icon.icon_id can be used in any UI function that accepts
# icon_value # try also setting text=""
# to get an icon only operator button
# We can store multiple preview collections here,
# however in this example we only store "main"
preview_collections = {}
def register():
# Note that preview collections returned by bpy.utils.previews
# are regular py objects - you can use them to store custom data.
import bpy.utils.previews
pcoll = bpy.utils.previews.new()
# path to the folder where the icon is
# the path is calculated relative to this py file inside the addon folder
my_icons_dir = os.path.join(os.path.dirname(__file__), "icons")
# load a preview thumbnail of a file and store in the previews collection
pcoll.load("my_icon", os.path.join(my_icons_dir, "icon-image.png"), 'IMAGE')
preview_collections["main"] = pcoll
bpy.utils.register_class(PreviewsExamplePanel)
def unregister():
for pcoll in preview_collections.values():
bpy.utils.previews.remove(pcoll)
preview_collections.clear()
bpy.utils.unregister_class(PreviewsExamplePanel)
if __name__ == "__main__":
register()
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