Implement standard UI List draw function

Same as before, only doing Textures right now.

korman/ui/__init__.py

@@ -14,6 +14,7 @@
 #    along with Korman.  If not, see <http://www.gnu.org/licenses/>.
 
 from .ui_lamp import *
+from .ui_list import *
 from .ui_menus import *
 from .ui_modifiers import *
 from .ui_object import *

korman/ui/ui_list.py

@@ -0,0 +1,46 @@
+#    This file is part of Korman.
+#
+#    Korman is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU General Public License as published by
+#    the Free Software Foundation, either version 3 of the License, or
+#    (at your option) any later version.
+#
+#    Korman is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU General Public License for more details.
+#
+#    You should have received a copy of the GNU General Public License
+#    along with Korman.  If not, see <http://www.gnu.org/licenses/>.
+
+import bpy
+
+def draw_list(layout, listtype, context_attr, prop_base, collection_name, index_name, **kwargs):
+    """Draws a generic UI list, including add/remove buttons. Note that in order to use this,
+       the parent datablock must be available in the context provided to operators. This should
+       always be true, but this is Blender...
+       Arguments:
+       - layout: required
+       - listtype: bpy.types.UIList subclass
+       - context_attr: attribute name to get the properties from in the current context
+       - prop_base: property group owning the collection
+       - collection_name: name of the collection property
+       - index_name: name of the active element index property
+       *** any other arguments are passed as keyword arguments to the template_list call 
+    """
+    prop_path = prop_base.path_from_id()
+    row = layout.row()
+    row.template_list(listtype, collection_name, prop_base, collection_name,
+                      prop_base, index_name, **kwargs)
+    col = row.column(align=True)
+    op = col.operator("ui.plasma_collection_add", icon="ZOOMIN", text="")
+    op.context = context_attr
+    op.group_path = prop_path
+    op.collection_prop = collection_name
+    op.index_prop = index_name
+    op = col.operator("ui.plasma_collection_remove", icon="ZOOMOUT", text="")
+    op.context = context_attr
+    op.group_path = prop_path
+    op.collection_prop = collection_name
+    op.index_prop = index_name
+

korman/ui/ui_texture.py

@@ -15,6 +15,8 @@
 
 import bpy
 
+from . import ui_list
+
 class TextureButtonsPanel:
     bl_space_type = "PROPERTIES"
     bl_region_type = "WINDOW"
@@ -42,20 +44,8 @@ class PlasmaEnvMapPanel(TextureButtonsPanel, bpy.types.Panel):
         layout.separator()
 
         layout.label("Visibility Sets:")
-        row = layout.row()
-        row.template_list("VisRegionListUI", "vis_regions", layer_props, "vis_regions", layer_props, "active_region_index",
-                          rows=2, maxrows=3)
-        col = row.column(align=True)
-        op = col.operator("ui.plasma_collection_add", icon="ZOOMIN", text="")
-        op.context = "texture"
-        op.group_path = "plasma_layer"
-        op.collection_prop = "vis_regions"
-        op.index_prop = "active_region_index"
-        op = col.operator("ui.plasma_collection_remove", icon="ZOOMOUT", text="")
-        op.context = "texture"
-        op.group_path = "plasma_layer"
-        op.collection_prop = "vis_regions"
-        op.index_prop = "active_region_index"
+        ui_list.draw_list(layout, "VisRegionListUI", "texture", layer_props,
+                          "vis_regions", "active_region_index", rows=2, maxrows=3)
         rgns = layer_props.vis_regions
         if layer_props.vis_regions:
             layout.prop(rgns[layer_props.active_region_index], "control_region")