Workbench: UI for custom studio lights/matcaps

- all known image types are supported
- BpyAPI for studiolights added
- added open user pref operator in shading menu
- possible to add multiple files in a single run

For now refreshing studio lights will free all studiolights and reinit
the whole mechanism. This can be improved by only freeing deleted, reset
updated and add new custom studiolights.

details to show currently only shows the path we perhaps want to add
other information also

1 files changed, 46 insertions, 0 deletions

diff --git a/release/scripts/startup/bl_ui/space_userpref.py b/release/scripts/startup/bl_ui/space_userpref.py
index d9cbc6416a3..7db91449049 100644
--- a/release/scripts/startup/bl_ui/space_userpref.py
+++ b/release/scripts/startup/bl_ui/space_userpref.py
@@ -22,6 +22,7 @@ from bpy.types import (
     Header,
     Menu,
     Panel,
+    Operator,
 )
 from bpy.app.translations import pgettext_iface as iface_
 from bpy.app.translations import contexts as i18n_contexts
@@ -1570,6 +1571,50 @@ class USERPREF_PT_addons(Panel):
                 row.label(text=module_name, translate=False)
 
 
+class USERPREF_PT_studiolight(Panel):
+    bl_space_type = 'USER_PREFERENCES'
+    bl_label = "Lights"
+    bl_region_type = 'WINDOW'
+    bl_options = {'HIDE_HEADER'}
+
+    @classmethod
+    def poll(cls, context):
+        userpref = context.user_preferences
+        return (userpref.active_section == 'LIGHTS')
+
+    def draw_studio_light(self, layout, studio_light):
+        box = layout.box()
+        row = box.row()
+
+        op = row.operator('wm.studiolight_expand', emboss=False, text="", icon='TRIA_DOWN' if studio_light.show_expanded else 'TRIA_RIGHT')
+        op.index = studio_light.index
+
+        row.label(text=studio_light.name, icon_value=studio_light.radiance_icon_id)
+        op = row.operator('wm.studiolight_uninstall', text="", icon='ZOOMOUT')
+        op.index = studio_light.index
+
+        if studio_light.show_expanded:
+            box.label(studio_light.path)
+
+
+    def draw(self, context):
+        layout = self.layout
+        userpref = context.user_preferences
+        lights = [light for light in userpref.studio_lights if light.is_user_defined]
+        layout.label("MatCaps")
+        for studio_light in filter(lambda x: x.orientation=='MATCAP', lights):
+            self.draw_studio_light(layout, studio_light)
+        layout.operator('wm.studiolight_install', text="Install Custom MatCap").orientation='MATCAP'
+        layout.label("World HDRI")
+        for studio_light in filter(lambda x: x.orientation=='WORLD', lights):
+            self.draw_studio_light(layout, studio_light)
+        layout.operator('wm.studiolight_install', text="Install Custom HDRI").orientation='WORLD'
+        layout.label("Camera HDRI")
+        for studio_light in filter(lambda x: x.orientation=='CAMERA', lights):
+            self.draw_studio_light(layout, studio_light)
+        layout.operator('wm.studiolight_install', text="Install Custom Camera HDRI").orientation='CAMERA'
+
+
 classes = (
     USERPREF_HT_header,
     USERPREF_PT_tabs,
@@ -1590,6 +1635,7 @@ classes = (
     USERPREF_PT_input,
     USERPREF_MT_addons_online_resources,
     USERPREF_PT_addons,
+    USERPREF_PT_studiolight,
 )
 
 if __name__ == "__main__":  # only for live edit.