5 files changed, 318 insertions, 494 deletions

diff --git a/source/blender/editors/space_buttons/buttons_context.c b/source/blender/editors/space_buttons/buttons_context.c
index f5e0ccb60c7..dd943e7988d 100644
--- a/source/blender/editors/space_buttons/buttons_context.c
+++ b/source/blender/editors/space_buttons/buttons_context.c
@@ -39,6 +39,7 @@
 #include "BLT_translation.h"
 
 #include "DNA_armature_types.h"
+#include "DNA_group_types.h"
 #include "DNA_lamp_types.h"
 #include "DNA_material_types.h"
 #include "DNA_node_types.h"
@@ -49,6 +50,7 @@
 
 #include "BKE_context.h"
 #include "BKE_action.h"
+#include "BKE_layer.h"
 #include "BKE_material.h"
 #include "BKE_modifier.h"
 #include "BKE_paint.h"
@@ -56,6 +58,7 @@
 #include "BKE_screen.h"
 #include "BKE_texture.h"
 #include "BKE_linestyle.h"
+#include "BKE_workspace.h"
 
 #include "RNA_access.h"
 
@@ -111,6 +114,20 @@ static int buttons_context_path_scene(ButsContextPath *path)
 	return RNA_struct_is_a(ptr->type, &RNA_Scene);
 }
 
+static int buttons_context_path_view_layer(ButsContextPath *path, WorkSpace *workspace)
+{
+	if (buttons_context_path_scene(path)) {
+		Scene *scene = path->ptr[path->len - 1].data;
+		ViewLayer *view_layer = BKE_view_layer_from_workspace_get(scene, workspace);
+
+		RNA_pointer_create(&scene->id, &RNA_ViewLayer, view_layer, &path->ptr[path->len]);
+		path->len++;
+		return 1;
+	}
+
+	return 0;
+}
+
 /* note: this function can return 1 without adding a world to the path
  * so the buttons stay visible, but be sure to check the ID type if a ID_WO */
 static int buttons_context_path_world(ButsContextPath *path)
@@ -142,9 +159,8 @@ static int buttons_context_path_world(ButsContextPath *path)
 	return 0;
 }
 
-static int buttons_context_path_linestyle(ButsContextPath *path)
+static int buttons_context_path_linestyle(ButsContextPath *path, WorkSpace *workspace)
 {
-	Scene *scene;
 	FreestyleLineStyle *linestyle;
 	PointerRNA *ptr = &path->ptr[path->len - 1];
 
@@ -152,10 +168,10 @@ static int buttons_context_path_linestyle(ButsContextPath *path)
 	if (RNA_struct_is_a(ptr->type, &RNA_FreestyleLineStyle)) {
 		return 1;
 	}
-	/* if we have a scene, use the lineset's linestyle */
-	else if (buttons_context_path_scene(path)) {
-		scene = path->ptr[path->len - 1].data;
-		linestyle = BKE_linestyle_active_from_scene(scene);
+	/* if we have a view layer, use the lineset's linestyle */
+	else if (buttons_context_path_view_layer(path, workspace)) {
+		ViewLayer *view_layer = path->ptr[path->len - 1].data;
+		linestyle = BKE_linestyle_active_from_view_layer(view_layer);
 		if (linestyle) {
 			RNA_id_pointer_create(&linestyle->id, &path->ptr[path->len]);
 			path->len++;
@@ -167,27 +183,31 @@ static int buttons_context_path_linestyle(ButsContextPath *path)
 	return 0;
 }
 
+static int buttons_context_path_workspace(ButsContextPath *path)
+{
+	PointerRNA *ptr = &path->ptr[path->len - 1];
+
+	/* This one just verifies. */
+	return RNA_struct_is_a(ptr->type, &RNA_WorkSpace);
+}
+
 static int buttons_context_path_object(ButsContextPath *path)
 {
-	Scene *scene;
-	Object *ob;
 	PointerRNA *ptr = &path->ptr[path->len - 1];
 
 	/* if we already have a (pinned) object, we're done */
 	if (RNA_struct_is_a(ptr->type, &RNA_Object)) {
 		return 1;
 	}
-	/* if we have a scene, use the scene's active object */
-	else if (buttons_context_path_scene(path)) {
-		scene = path->ptr[path->len - 1].data;
-		ob = (scene->basact) ? scene->basact->object : NULL;
 
-		if (ob) {
-			RNA_id_pointer_create(&ob->id, &path->ptr[path->len]);
-			path->len++;
+	ViewLayer *view_layer = ptr->data;
+	Object *ob = (view_layer->basact) ? view_layer->basact->object : NULL;
 
-			return 1;
-		}
+	if (ob) {
+		RNA_id_pointer_create(&ob->id, &path->ptr[path->len]);
+		path->len++;
+
+		return 1;
 	}
 
 	/* no path to a object possible */
@@ -208,6 +228,7 @@ static int buttons_context_path_data(ButsContextPath *path, int type)
 	else if (RNA_struct_is_a(ptr->type, &RNA_Camera) && (type == -1 || type == OB_CAMERA)) return 1;
 	else if (RNA_struct_is_a(ptr->type, &RNA_Lamp) && (type == -1 || type == OB_LAMP)) return 1;
 	else if (RNA_struct_is_a(ptr->type, &RNA_Speaker) && (type == -1 || type == OB_SPEAKER)) return 1;
+	else if (RNA_struct_is_a(ptr->type, &RNA_LightProbe) && (type == -1 || type == OB_LIGHTPROBE)) return 1;
 	/* try to get an object in the path, no pinning supported here */
 	else if (buttons_context_path_object(path)) {
 		ob = path->ptr[path->len - 1].data;
@@ -238,7 +259,7 @@ static int buttons_context_path_modifier(ButsContextPath *path)
 	return 0;
 }
 
-static int buttons_context_path_material(ButsContextPath *path, bool for_texture, bool new_shading)
+static int buttons_context_path_material(ButsContextPath *path)
 {
 	Object *ob;
 	PointerRNA *ptr = &path->ptr[path->len - 1];
@@ -256,18 +277,6 @@ static int buttons_context_path_material(ButsContextPath *path, bool for_texture
 			ma = give_current_material(ob, ob->actcol);
 			RNA_id_pointer_create(&ma->id, &path->ptr[path->len]);
 			path->len++;
-
-			if (for_texture && give_current_material_texture_node(ma))
-				return 1;
-
-			if (!new_shading) {
-				/* Only try to get mat from node in case of old shading system (see T40331). */
-				ma = give_node_material(ma);
-				if (ma) {
-					RNA_id_pointer_create(&ma->id, &path->ptr[path->len]);
-					path->len++;
-				}
-			}
 			return 1;
 		}
 	}
@@ -367,7 +376,7 @@ static int buttons_context_path_particle(ButsContextPath *path)
 	return 0;
 }
 
-static int buttons_context_path_brush(ButsContextPath *path)
+static int buttons_context_path_brush(const bContext *C, ButsContextPath *path)
 {
 	Scene *scene;
 	Brush *br = NULL;
@@ -381,8 +390,10 @@ static int buttons_context_path_brush(ButsContextPath *path)
 	else if (buttons_context_path_scene(path)) {
 		scene = path->ptr[path->len - 1].data;
 
-		if (scene)
-			br = BKE_paint_brush(BKE_paint_get_active(scene));
+		if (scene) {
+			ViewLayer *view_layer = CTX_data_view_layer(C);
+			br = BKE_paint_brush(BKE_paint_get_active(scene, view_layer));
+		}
 
 		if (br) {
 			RNA_id_pointer_create((ID *)br, &path->ptr[path->len]);
@@ -396,141 +407,46 @@ static int buttons_context_path_brush(ButsContextPath *path)
 	return 0;
 }
 
-static int buttons_context_path_texture(ButsContextPath *path, ButsContextTexture *ct)
+static int buttons_context_path_texture(const bContext *C, ButsContextPath *path, ButsContextTexture *ct)
 {
-	if (ct) {
-		/* new shading system */
-		PointerRNA *ptr = &path->ptr[path->len - 1];
-		ID *id;
-
-		/* if we already have a (pinned) texture, we're done */
-		if (RNA_struct_is_a(ptr->type, &RNA_Texture))
-			return 1;
-
-		if (!ct->user)
-			return 0;
-
-		id = ct->user->id;
-
-		if (id) {
-			if (GS(id->name) == ID_BR)
-				buttons_context_path_brush(path);
-			else if (GS(id->name) == ID_MA)
-				buttons_context_path_material(path, false, true);
-			else if (GS(id->name) == ID_WO)
-				buttons_context_path_world(path);
-			else if (GS(id->name) == ID_LA)
-				buttons_context_path_data(path, OB_LAMP);
-			else if (GS(id->name) == ID_PA)
-				buttons_context_path_particle(path);
-			else if (GS(id->name) == ID_OB)
-				buttons_context_path_object(path);
-			else if (GS(id->name) == ID_LS)
-				buttons_context_path_linestyle(path);
-		}
+	PointerRNA *ptr = &path->ptr[path->len - 1];
+	ID *id;
 
-		if (ct->texture) {
-			RNA_id_pointer_create(&ct->texture->id, &path->ptr[path->len]);
-			path->len++;
-		}
+	if (!ct)
+		return 0;
 
+	/* if we already have a (pinned) texture, we're done */
+	if (RNA_struct_is_a(ptr->type, &RNA_Texture))
 		return 1;
-	}
-	else {
-		/* old shading system */
-		Material *ma;
-		Lamp *la;
-		World *wo;
-		ParticleSystem *psys;
-		FreestyleLineStyle *ls;
-		Tex *tex;
-		PointerRNA *ptr = &path->ptr[path->len - 1];
-
-		/* if we already have a (pinned) texture, we're done */
-		if (RNA_struct_is_a(ptr->type, &RNA_Texture)) {
-			return 1;
-		}
-		/* try world */
-		else if ((path->tex_ctx == SB_TEXC_WORLD) && buttons_context_path_world(path)) {
-			wo = path->ptr[path->len - 1].data;
-
-			if (wo && GS(wo->id.name) == ID_WO) {
-				tex = give_current_world_texture(wo);
-
-				RNA_id_pointer_create(&tex->id, &path->ptr[path->len]);
-				path->len++;
-				return 1;
-			}
-		}
-		/* try particles */
-		else if ((path->tex_ctx == SB_TEXC_PARTICLES) && buttons_context_path_particle(path)) {
-			if (path->ptr[path->len - 1].type == &RNA_ParticleSettings) {
-				ParticleSettings *part = path->ptr[path->len - 1].data;
 
-				tex = give_current_particle_texture(part);
-				RNA_id_pointer_create(&tex->id, &path->ptr[path->len]);
-				path->len++;
-				return 1;
-			}
-			else {
-				psys = path->ptr[path->len - 1].data;
-
-				if (psys && psys->part && GS(psys->part->id.name) == ID_PA) {
-					tex = give_current_particle_texture(psys->part);
-
-					RNA_id_pointer_create(&tex->id, &path->ptr[path->len]);
-					path->len++;
-					return 1;
-				}
-			}
-		}
-		/* try material */
-		else if ((path->tex_ctx == SB_TEXC_MATERIAL) && buttons_context_path_material(path, true, false)) {
-			ma = path->ptr[path->len - 1].data;
-
-			if (ma) {
-				tex = give_current_material_texture(ma);
-
-				RNA_id_pointer_create(&tex->id, &path->ptr[path->len]);
-				path->len++;
-				return 1;
-			}
-		}
-		/* try lamp */
-		else if ((path->tex_ctx == SB_TEXC_LAMP) && buttons_context_path_data(path, OB_LAMP)) {
-			la = path->ptr[path->len - 1].data;
-
-			if (la) {
-				tex = give_current_lamp_texture(la);
+	if (!ct->user)
+		return 0;
 
-				RNA_id_pointer_create(&tex->id, &path->ptr[path->len]);
-				path->len++;
-				return 1;
-			}
-		}
-		/* try linestyle */
-		else if ((path->tex_ctx == SB_TEXC_LINESTYLE) && buttons_context_path_linestyle(path)) {
-			ls = path->ptr[path->len - 1].data;
+	id = ct->user->id;
 
-			if (ls) {
-				tex = give_current_linestyle_texture(ls);
+	if (id) {
+		if (GS(id->name) == ID_BR)
+			buttons_context_path_brush(C, path);
+		else if (GS(id->name) == ID_PA)
+			buttons_context_path_particle(path);
+		else if (GS(id->name) == ID_OB)
+			buttons_context_path_object(path);
+		else if (GS(id->name) == ID_LS)
+			buttons_context_path_linestyle(path, CTX_wm_workspace(C));
+	}
 
-				RNA_id_pointer_create(&tex->id, &path->ptr[path->len]);
-				path->len++;
-				return 1;
-			}
-		}
+	if (ct->texture) {
+		RNA_id_pointer_create(&ct->texture->id, &path->ptr[path->len]);
+		path->len++;
 	}
 
-	/* no path to a texture possible */
-	return 0;
+	return 1;
 }
 
 #ifdef WITH_FREESTYLE
-static bool buttons_context_linestyle_pinnable(const bContext *C)
+static bool buttons_context_linestyle_pinnable(const bContext *C, ViewLayer *view_layer)
 {
 	Scene *scene = CTX_data_scene(C);
-	SceneRenderLayer *actsrl;
 	FreestyleConfig *config;
 	SpaceButs *sbuts;
 
@@ -539,8 +455,7 @@ static bool buttons_context_linestyle_pinnable(const bContext *C)
 		return false;
 	}
 	/* if Freestyle is not in the Parameter Editor mode */
-	actsrl = BLI_findlink(&scene->r.layers, scene->r.actlay);
-	config = &actsrl->freestyleConfig;
+	config = &view_layer->freestyle_config;
 	if (config->mode != FREESTYLE_CONTROL_EDITOR_MODE) {
 		return false;
 	}
@@ -556,26 +471,37 @@ static bool buttons_context_linestyle_pinnable(const bContext *C)
 static int buttons_context_path(const bContext *C, ButsContextPath *path, int mainb, int flag)
 {
 	SpaceButs *sbuts = CTX_wm_space_buts(C);
+	Scene *scene = CTX_data_scene(C);
+	WorkSpace *workspace = CTX_wm_workspace(C);
+	ViewLayer *view_layer = BKE_view_layer_from_workspace_get(scene, workspace);
 	ID *id;
 	int found;
 
 	memset(path, 0, sizeof(*path));
 	path->flag = flag;
-	path->tex_ctx = sbuts->texture_context;
 
-	/* if some ID datablock is pinned, set the root pointer */
+	/* If some ID datablock is pinned, set the root pointer. */
 	if (sbuts->pinid) {
 		id = sbuts->pinid;
 
 		RNA_id_pointer_create(id, &path->ptr[0]);
 		path->len++;
 	}
+	/* No pinned root, use scene as initial root. */
+	else {
+		if (ELEM(mainb, BCONTEXT_WORKSPACE, BCONTEXT_TOOL)) {
+			RNA_id_pointer_create(&workspace->id, &path->ptr[0]);
+			path->len++;
+		}
+		else {
+			RNA_id_pointer_create(&scene->id, &path->ptr[0]);
+			path->len++;
 
-	/* no pinned root, use scene as root */
-	if (path->len == 0) {
-		id = (ID *)CTX_data_scene(C);
-		RNA_id_pointer_create(id, &path->ptr[0]);
-		path->len++;
+			if (!ELEM(mainb, BCONTEXT_SCENE, BCONTEXT_RENDER, BCONTEXT_VIEW_LAYER, BCONTEXT_WORLD)) {
+				RNA_pointer_create(NULL, &RNA_ViewLayer, view_layer, &path->ptr[path->len]);
+				path->len++;
+			}
+		}
 	}
 
 	/* now for each buttons context type, we try to construct a path,
@@ -585,20 +511,24 @@ static int buttons_context_path(const bContext *C, ButsContextPath *path, int ma
 		case BCONTEXT_RENDER:
 			found = buttons_context_path_scene(path);
 			break;
-		case BCONTEXT_RENDER_LAYER:
+		case BCONTEXT_VIEW_LAYER:
 #ifdef WITH_FREESTYLE
-			if (buttons_context_linestyle_pinnable(C)) {
-				found = buttons_context_path_linestyle(path);
+			if (buttons_context_linestyle_pinnable(C, view_layer)) {
+				found = buttons_context_path_linestyle(path, workspace);
 				if (found) {
 					break;
 				}
 			}
 #endif
-			found = buttons_context_path_scene(path);
+			found = buttons_context_path_view_layer(path, workspace);
 			break;
 		case BCONTEXT_WORLD:
 			found = buttons_context_path_world(path);
 			break;
+		case BCONTEXT_TOOL:
+		case BCONTEXT_WORKSPACE:
+			found = buttons_context_path_workspace(path);
+			break;
 		case BCONTEXT_OBJECT:
 		case BCONTEXT_PHYSICS:
 		case BCONTEXT_CONSTRAINT:
@@ -614,10 +544,10 @@ static int buttons_context_path(const bContext *C, ButsContextPath *path, int ma
 			found = buttons_context_path_particle(path);
 			break;
 		case BCONTEXT_MATERIAL:
-			found = buttons_context_path_material(path, false, (sbuts->texuser != NULL));
+			found = buttons_context_path_material(path);
 			break;
 		case BCONTEXT_TEXTURE:
-			found = buttons_context_path_texture(path, sbuts->texuser);
+			found = buttons_context_path_texture(C, path, sbuts->texuser);
 			break;
 		case BCONTEXT_BONE:
 			found = buttons_context_path_bone(path);
@@ -672,7 +602,7 @@ void buttons_context_compute(const bContext *C, SpaceButs *sbuts)
 
 	path = sbuts->path;
 
-	/* We need to set Scene path now! Else, buttons_texture_context_compute() might not get a valid scene. */
+	/* Set scene path. */
 	buttons_context_path(C, path, BCONTEXT_SCENE, pflag);
 
 	buttons_texture_context_compute(C, sbuts);
@@ -740,11 +670,11 @@ void buttons_context_compute(const bContext *C, SpaceButs *sbuts)
 
 const char *buttons_context_dir[] = {
 	"texture_slot", "scene", "world", "object", "mesh", "armature", "lattice", "curve",
-	"meta_ball", "lamp", "speaker", "camera", "material", "material_slot",
+	"meta_ball", "lamp", "speaker", "lightprobe", "camera", "material", "material_slot",
 	"texture", "texture_user", "texture_user_property", "bone", "edit_bone",
 	"pose_bone", "particle_system", "particle_system_editable", "particle_settings",
 	"cloth", "soft_body", "fluid", "smoke", "collision", "brush", "dynamic_paint",
-	"line_style", NULL
+	"line_style", "collection", NULL
 };
 
 int buttons_context(const bContext *C, const char *member, bContextDataResult *result)
@@ -809,6 +739,10 @@ int buttons_context(const bContext *C, const char *member, bContextDataResult *r
 		set_pointer_type(path, result, &RNA_Speaker);
 		return 1;
 	}
+	else if (CTX_data_equals(member, "lightprobe")) {
+		set_pointer_type(path, result, &RNA_LightProbe);
+		return 1;
+	}
 	else if (CTX_data_equals(member, "material")) {
 		set_pointer_type(path, result, &RNA_Material);
 		return 1;
@@ -817,13 +751,8 @@ int buttons_context(const bContext *C, const char *member, bContextDataResult *r
 		ButsContextTexture *ct = sbuts->texuser;
 
 		if (ct) {
-			/* new shading system */
 			CTX_data_pointer_set(result, &ct->texture->id, &RNA_Texture, ct->texture);
 		}
-		else {
-			/* old shading system */
-			set_pointer_type(path, result, &RNA_Texture);
-		}
 
 		return 1;
 	}
@@ -847,7 +776,7 @@ int buttons_context(const bContext *C, const char *member, bContextDataResult *r
 		ButsContextTexture *ct = sbuts->texuser;
 
 		if (!ct)
-			return -1;  /* old shading system (found but not available) */
+			return -1;
 
 		if (ct->user && ct->user->ptr.data) {
 			ButsTextureUser *user = ct->user;
@@ -860,7 +789,7 @@ int buttons_context(const bContext *C, const char *member, bContextDataResult *r
 		ButsContextTexture *ct = sbuts->texuser;
 
 		if (!ct)
-			return -1;  /* old shading system (found but not available) */
+			return -1;
 
 		if (ct->user && ct->user->ptr.data) {
 			ButsTextureUser *user = ct->user;
@@ -880,21 +809,6 @@ int buttons_context(const bContext *C, const char *member, bContextDataResult *r
 
 			return 1;
 		}
-		else {
-			/* old shading system */
-			PointerRNA *ptr;
-
-			if ((ptr = get_pointer_type(path, &RNA_Material))) {
-				Material *ma = ptr->data;
-
-				if (ma) {
-					bNode *node = give_current_material_texture_node(ma);
-					CTX_data_pointer_set(result, &ma->nodetree->id, &RNA_Node, node);
-				}
-			}
-
-			return 1;
-		}
 	}
 	else if (CTX_data_equals(member, "texture_slot")) {
 		ButsContextTexture *ct = sbuts->texuser;
@@ -910,38 +824,6 @@ int buttons_context(const bContext *C, const char *member, bContextDataResult *r
 		else if (ct) {
 			return 0;  /* new shading system */
 		}
-		else if ((ptr = get_pointer_type(path, &RNA_Material))) {
-			Material *ma = ptr->data;
-
-			/* if we have a node material, get slot from material in material node */
-			if (ma && ma->use_nodes && ma->nodetree) {
-				/* if there's an active texture node in the node tree,
-				 * then that texture is in context directly, without a texture slot */
-				if (give_current_material_texture_node(ma))
-					return 0;
-
-				ma = give_node_material(ma);
-				if (ma)
-					CTX_data_pointer_set(result, &ma->id, &RNA_MaterialTextureSlot, ma->mtex[(int)ma->texact]);
-				else
-					return 0;
-			}
-			else if (ma) {
-				CTX_data_pointer_set(result, &ma->id, &RNA_MaterialTextureSlot, ma->mtex[(int)ma->texact]);
-			}
-		}
-		else if ((ptr = get_pointer_type(path, &RNA_Lamp))) {
-			Lamp *la = ptr->data;
-
-			if (la)
-				CTX_data_pointer_set(result, &la->id, &RNA_LampTextureSlot, la->mtex[(int)la->texact]);
-		}
-		else if ((ptr = get_pointer_type(path, &RNA_World))) {
-			World *wo = ptr->data;
-
-			if (wo)
-				CTX_data_pointer_set(result, &wo->id, &RNA_WorldTextureSlot, wo->mtex[(int)wo->texact]);
-		}
 		else if ((ptr = get_pointer_type(path, &RNA_FreestyleLineStyle))) {
 			FreestyleLineStyle *ls = ptr->data;
 
@@ -1121,10 +1003,15 @@ void buttons_context_draw(const bContext *C, uiLayout *layout)
 			name = RNA_struct_name_get_alloc(ptr, namebuf, sizeof(namebuf), NULL);
 
 			if (name) {
-				if (!ELEM(sbuts->mainb, BCONTEXT_RENDER, BCONTEXT_SCENE, BCONTEXT_RENDER_LAYER) && ptr->type == &RNA_Scene)
+				if ((!ELEM(sbuts->mainb, BCONTEXT_RENDER, BCONTEXT_SCENE, BCONTEXT_VIEW_LAYER) && ptr->type == &RNA_Scene)) {
 					uiItemLDrag(row, ptr, "", icon);  /* save some space */
-				else
+				}
+				else if ((!ELEM(sbuts->mainb, BCONTEXT_RENDER, BCONTEXT_SCENE, BCONTEXT_VIEW_LAYER) && ptr->type == &RNA_ViewLayer)) {
+					uiItemLDrag(row, ptr, "", icon);  /* save some space */
+				}
+				else {
 					uiItemLDrag(row, ptr, name, icon);
+				}
 
 				if (name != namebuf)
 					MEM_freeN(name);
diff --git a/source/blender/editors/space_buttons/buttons_intern.h b/source/blender/editors/space_buttons/buttons_intern.h
index 77623974d0a..aab7b39484d 100644
--- a/source/blender/editors/space_buttons/buttons_intern.h
+++ b/source/blender/editors/space_buttons/buttons_intern.h
@@ -45,26 +45,13 @@ struct bNodeTree;
 struct uiLayout;
 struct wmOperatorType;
 
-/* buts->scaflag */
-#define BUTS_SENS_SEL       1
-#define BUTS_SENS_ACT       2
-#define BUTS_SENS_LINK      4
-#define BUTS_CONT_SEL       8
-#define BUTS_CONT_ACT       16
-#define BUTS_CONT_LINK      32
-#define BUTS_ACT_SEL        64
-#define BUTS_ACT_ACT        128
-#define BUTS_ACT_LINK       256
-#define BUTS_SENS_STATE     512
-#define BUTS_ACT_STATE      1024
-
 /* context data */
 
 typedef struct ButsContextPath {
 	PointerRNA ptr[8];
 	int len;
 	int flag;
-	int tex_ctx;
+	int collection_ctx;
 } ButsContextPath;
 
 typedef struct ButsTextureUser {
@@ -111,6 +98,6 @@ void buttons_texture_context_compute(const struct bContext *C, struct SpaceButs
 /* buttons_ops.c */
 void BUTTONS_OT_file_browse(struct wmOperatorType *ot);
 void BUTTONS_OT_directory_browse(struct wmOperatorType *ot);
-void BUTTONS_OT_toolbox(struct wmOperatorType *ot);
+void BUTTONS_OT_context_menu(struct wmOperatorType *ot);
 
 #endif /* __BUTTONS_INTERN_H__ */
diff --git a/source/blender/editors/space_buttons/buttons_ops.c b/source/blender/editors/space_buttons/buttons_ops.c
index 47f97b8087f..93670919d4c 100644
--- a/source/blender/editors/space_buttons/buttons_ops.c
+++ b/source/blender/editors/space_buttons/buttons_ops.c
@@ -60,9 +60,9 @@
 
 #include "buttons_intern.h"  /* own include */
 
-/********************** toolbox operator *********************/
+/********************** context_menu operator *********************/
 
-static int toolbox_invoke(bContext *C, wmOperator *UNUSED(op), const wmEvent *UNUSED(event))
+static int context_menu_invoke(bContext *C, wmOperator *UNUSED(op), const wmEvent *UNUSED(event))
 {
 	bScreen *sc = CTX_wm_screen(C);
 	SpaceButs *sbuts = CTX_wm_space_buts(C);
@@ -80,15 +80,15 @@ static int toolbox_invoke(bContext *C, wmOperator *UNUSED(op), const wmEvent *UN
 	return OPERATOR_INTERFACE;
 }
 
-void BUTTONS_OT_toolbox(wmOperatorType *ot)
+void BUTTONS_OT_context_menu(wmOperatorType *ot)
 {
 	/* identifiers */
-	ot->name = "Toolbox";
-	ot->description = "Display button panel toolbox";
-	ot->idname = "BUTTONS_OT_toolbox";
+	ot->name = "Context Menu";
+	ot->description = "Display button panel context_menu";
+	ot->idname = "BUTTONS_OT_context_menu";
 
 	/* api callbacks */
-	ot->invoke = toolbox_invoke;
+	ot->invoke = context_menu_invoke;
 	ot->poll = ED_operator_buttons_active;
 }
 
diff --git a/source/blender/editors/space_buttons/buttons_texture.c b/source/blender/editors/space_buttons/buttons_texture.c
index 1d9d5130f98..5feb74edef7 100644
--- a/source/blender/editors/space_buttons/buttons_texture.c
+++ b/source/blender/editors/space_buttons/buttons_texture.c
@@ -41,8 +41,6 @@
 
 #include "DNA_brush_types.h"
 #include "DNA_ID.h"
-#include "DNA_lamp_types.h"
-#include "DNA_material_types.h"
 #include "DNA_node_types.h"
 #include "DNA_object_types.h"
 #include "DNA_object_force_types.h"
@@ -50,17 +48,17 @@
 #include "DNA_scene_types.h"
 #include "DNA_screen_types.h"
 #include "DNA_space_types.h"
-#include "DNA_world_types.h"
 #include "DNA_linestyle_types.h"
 
 #include "BKE_context.h"
+#include "BKE_layer.h"
 #include "BKE_linestyle.h"
-#include "BKE_material.h"
 #include "BKE_modifier.h"
 #include "BKE_node.h"
 #include "BKE_paint.h"
 #include "BKE_particle.h"
 #include "BKE_scene.h"
+#include "BKE_workspace.h"
 #ifdef WITH_FREESTYLE
 #  include "BKE_freestyle.h"
 #endif
@@ -78,172 +76,6 @@
 
 #include "buttons_intern.h" // own include
 
-/****************** "Old Shading" Texture Context ****************/
-
-bool ED_texture_context_check_world(const bContext *C)
-{
-	Scene *scene = CTX_data_scene(C);
-	return (scene && scene->world);
-}
-
-bool ED_texture_context_check_material(const bContext *C)
-{
-	Object *ob = CTX_data_active_object(C);
-	return (ob && (ob->totcol != 0));
-}
-
-bool ED_texture_context_check_lamp(const bContext *C)
-{
-	Object *ob = CTX_data_active_object(C);
-	return (ob && (ob->type == OB_LAMP));
-}
-
-bool ED_texture_context_check_particles(const bContext *C)
-{
-	Object *ob = CTX_data_active_object(C);
-	return (ob && ob->particlesystem.first);
-}
-
-bool ED_texture_context_check_linestyle(const bContext *C)
-{
-#ifdef WITH_FREESTYLE
-	Scene *scene = CTX_data_scene(C);
-	SceneRenderLayer *actsrl;
-	FreestyleConfig *config;
-	FreestyleLineSet *lineset;
-	FreestyleLineStyle *linestyle;
-
-	if (scene && (scene->r.mode & R_EDGE_FRS)) {
-		actsrl = BLI_findlink(&scene->r.layers, scene->r.actlay);
-		config = &actsrl->freestyleConfig;
-		if (config->mode == FREESTYLE_CONTROL_EDITOR_MODE) {
-			lineset = BKE_freestyle_lineset_get_active(config);
-			if (lineset) {
-				linestyle = lineset->linestyle;
-				return linestyle && (linestyle->flag & LS_TEXTURE);
-			}
-		}
-	}
-#else
-	(void)C;
-#endif
-	return false;
-}
-
-static void texture_context_check_modifier_foreach(void *userData, Object *UNUSED(ob), ModifierData *UNUSED(md),
-                                                   const char *UNUSED(propname))
-{
-	*((bool *)userData) = true;
-}
-
-bool ED_texture_context_check_others(const bContext *C)
-{
-	/* We cannot rely on sbuts->texuser here, as it is NULL when in "old" tex handling, non-OTHERS tex context. */
-	Object *ob = CTX_data_active_object(C);
-
-	/* object */
-	if (ob) {
-		/* Tex force field. */
-		if (ob->pd && ob->pd->forcefield == PFIELD_TEXTURE) {
-			return true;
-		}
-
-		/* modifiers */
-		{
-			bool check = false;
-			modifiers_foreachTexLink(ob, texture_context_check_modifier_foreach, &check);
-			if (check) {
-				return true;
-			}
-		}
-	}
-
-	/* brush */
-	if (BKE_paint_brush(BKE_paint_get_active_from_context(C))) {
-		return true;
-	}
-
-	return false;
-}
-
-static void set_texture_context(const bContext *C, SpaceButs *sbuts)
-{
-	Scene *scene = CTX_data_scene(C);
-
-	if (BKE_scene_use_new_shading_nodes(scene)) {
-		return;  /* No texture context in new shading mode */
-	}
-
-	{
-		bool valid_world = ED_texture_context_check_world(C);
-		bool valid_material = ED_texture_context_check_material(C);
-		bool valid_lamp = ED_texture_context_check_lamp(C);
-		bool valid_particles = ED_texture_context_check_particles(C);
-		bool valid_linestyle = ED_texture_context_check_linestyle(C);
-		bool valid_others = ED_texture_context_check_others(C);
-
-		/* this is similar to direct user action, no need to keep "better" ctxt in _prev */
-		if ((sbuts->mainb == BCONTEXT_WORLD) && valid_world) {
-			sbuts->texture_context = sbuts->texture_context_prev = SB_TEXC_WORLD;
-		}
-		else if ((sbuts->mainb == BCONTEXT_MATERIAL) && valid_material) {
-			sbuts->texture_context = sbuts->texture_context_prev = SB_TEXC_MATERIAL;
-		}
-		else if ((sbuts->mainb == BCONTEXT_DATA) && valid_lamp) {
-			sbuts->texture_context = sbuts->texture_context_prev = SB_TEXC_LAMP;
-		}
-		else if ((sbuts->mainb == BCONTEXT_PARTICLE) && valid_particles) {
-			sbuts->texture_context = sbuts->texture_context_prev = SB_TEXC_PARTICLES;
-		}
-		else if ((sbuts->mainb == BCONTEXT_RENDER_LAYER) && valid_linestyle) {
-			sbuts->texture_context = sbuts->texture_context_prev = SB_TEXC_LINESTYLE;
-		}
-		else if ((ELEM(sbuts->mainb, BCONTEXT_MODIFIER, BCONTEXT_PHYSICS)) && valid_others) {
-			sbuts->texture_context = sbuts->texture_context_prev = SB_TEXC_OTHER;
-		}
-		/* Else, try to revive a previous "better" ctxt... */
-		else if ((sbuts->texture_context_prev != sbuts->texture_context) &&
-		         (((sbuts->texture_context_prev == SB_TEXC_WORLD) && valid_world) ||
-		          ((sbuts->texture_context_prev == SB_TEXC_MATERIAL) && valid_material) ||
-		          ((sbuts->texture_context_prev == SB_TEXC_LAMP) && valid_lamp) ||
-		          ((sbuts->texture_context_prev == SB_TEXC_PARTICLES) && valid_particles) ||
-		          ((sbuts->texture_context_prev == SB_TEXC_LINESTYLE) && valid_linestyle) ||
-		          ((sbuts->texture_context_prev == SB_TEXC_OTHER) && valid_others)))
-		{
-			sbuts->texture_context = sbuts->texture_context_prev;
-		}
-		/* Else, just be sure that current context is valid! */
-		else if (((sbuts->texture_context == SB_TEXC_WORLD) && !valid_world) ||
-		         ((sbuts->texture_context == SB_TEXC_MATERIAL) && !valid_material) ||
-		         ((sbuts->texture_context == SB_TEXC_LAMP) && !valid_lamp) ||
-		         ((sbuts->texture_context == SB_TEXC_PARTICLES) && !valid_particles) ||
-		         ((sbuts->texture_context == SB_TEXC_LINESTYLE) && !valid_linestyle) ||
-		         ((sbuts->texture_context == SB_TEXC_OTHER) && !valid_others))
-		{
-			/* this is default fallback, do keep "better" ctxt in _prev */
-			sbuts->texture_context_prev = sbuts->texture_context;
-			if (valid_material) {
-				sbuts->texture_context = SB_TEXC_MATERIAL;
-			}
-			else if (valid_lamp) {
-				sbuts->texture_context = SB_TEXC_LAMP;
-			}
-			else if (valid_particles) {
-				sbuts->texture_context = SB_TEXC_PARTICLES;
-			}
-			else if (valid_linestyle) {
-				sbuts->texture_context = SB_TEXC_LINESTYLE;
-			}
-			else if (valid_world) {
-				sbuts->texture_context = SB_TEXC_WORLD;
-			}
-			else if (valid_others) {
-				sbuts->texture_context = SB_TEXC_OTHER;
-			}
-		}
-	}
-}
-
 /************************* Texture User **************************/
 
 static void buttons_texture_user_property_add(ListBase *users, ID *id,
@@ -321,9 +153,6 @@ static void buttons_texture_users_from_context(ListBase *users, const bContext *
 {
 	Scene *scene = NULL;
 	Object *ob = NULL;
-	Material *ma = NULL;
-	Lamp *la = NULL;
-	World *wrld = NULL;
 	FreestyleLineStyle *linestyle = NULL;
 	Brush *brush = NULL;
 	ID *pinid = sbuts->pinid;
@@ -335,42 +164,29 @@ static void buttons_texture_users_from_context(ListBase *users, const bContext *
 			scene = (Scene *)pinid;
 		else if (GS(pinid->name) == ID_OB)
 			ob = (Object *)pinid;
-		else if (GS(pinid->name) == ID_LA)
-			la = (Lamp *)pinid;
-		else if (GS(pinid->name) == ID_WO)
-			wrld = (World *)pinid;
-		else if (GS(pinid->name) == ID_MA)
-			ma = (Material *)pinid;
 		else if (GS(pinid->name) == ID_BR)
 			brush = (Brush *)pinid;
 		else if (GS(pinid->name) == ID_LS)
 			linestyle = (FreestyleLineStyle *)pinid;
 	}
 
-	if (!scene)
+	if (!scene) {
 		scene = CTX_data_scene(C);
+	}
+
+	const ID_Type id_type = pinid != NULL ? GS(pinid->name) : -1;
+	if (!pinid || id_type == ID_SCE) {
+		WorkSpace *workspace = CTX_wm_workspace(C);
+		ViewLayer *view_layer = BKE_workspace_view_layer_get(workspace, scene);
 
-	if (!pinid || GS(pinid->name) == ID_SCE) {
-		ob = (scene->basact) ? scene->basact->object : NULL;
-		wrld = scene->world;
 		brush = BKE_paint_brush(BKE_paint_get_active_from_context(C));
-		linestyle = BKE_linestyle_active_from_scene(scene);
+		linestyle = BKE_linestyle_active_from_view_layer(view_layer);
+		ob = OBACT(view_layer);
 	}
 
-	if (ob && ob->type == OB_LAMP && !la)
-		la = ob->data;
-	if (ob && !ma)
-		ma = give_current_material(ob, ob->actcol);
-
 	/* fill users */
 	BLI_listbase_clear(users);
 
-	if (ma && !limited_mode)
-		buttons_texture_users_find_nodetree(users, &ma->id, ma->nodetree, N_("Material"));
-	if (la && !limited_mode)
-		buttons_texture_users_find_nodetree(users, &la->id, la->nodetree, N_("Lamp"));
-	if (wrld && !limited_mode)
-		buttons_texture_users_find_nodetree(users, &wrld->id, wrld->nodetree, N_("World"));
 	if (linestyle && !limited_mode)
 		buttons_texture_users_find_nodetree(users, &linestyle->id, linestyle->nodetree, N_("Line Style"));
 
@@ -439,21 +255,8 @@ void buttons_texture_context_compute(const bContext *C, SpaceButs *sbuts)
 	/* gather available texture users in context. runs on every draw of
 	 * properties editor, before the buttons are created. */
 	ButsContextTexture *ct = sbuts->texuser;
-	Scene *scene = CTX_data_scene(C);
 	ID *pinid = sbuts->pinid;
 
-	set_texture_context(C, sbuts);
-
-	if (!((sbuts->texture_context == SB_TEXC_OTHER) || BKE_scene_use_new_shading_nodes(scene))) {
-		if (ct) {
-			BLI_freelistN(&ct->users);
-			MEM_freeN(ct);
-			sbuts->texuser = NULL;
-		}
-
-		return;
-	}
-
 	if (!ct) {
 		ct = MEM_callocN(sizeof(ButsContextTexture), "ButsContextTexture");
 		sbuts->texuser = ct;
diff --git a/source/blender/editors/space_buttons/space_buttons.c b/source/blender/editors/space_buttons/space_buttons.c
index 7bcad841bca..a951c2a8524 100644
--- a/source/blender/editors/space_buttons/space_buttons.c
+++ b/source/blender/editors/space_buttons/space_buttons.c
@@ -44,14 +44,21 @@
 
 #include "WM_api.h"
 #include "WM_types.h"
+#include "WM_message.h"
 
 #include "RNA_access.h"
+#include "RNA_define.h"
+#include "RNA_enum_types.h"
+
+#include "UI_resources.h"
+
+#include "GPU_glew.h"
 
 #include "buttons_intern.h"  /* own include */
 
 /* ******************** default callbacks for buttons space ***************** */
 
-static SpaceLink *buttons_new(const bContext *UNUSED(C))
+static SpaceLink *buttons_new(const ScrArea *UNUSED(area), const Scene *UNUSED(scene))
 {
 	ARegion *ar;
 	SpaceButs *sbuts;
@@ -60,6 +67,8 @@ static SpaceLink *buttons_new(const bContext *UNUSED(C))
 	sbuts->spacetype = SPACE_BUTS;
 	sbuts->align = BUT_VERTICAL;
 
+	sbuts->mainb = sbuts->mainbuser = BCONTEXT_OBJECT;
+
 	/* header */
 	ar = MEM_callocN(sizeof(ARegion), "header for buts");
 
@@ -135,50 +144,161 @@ static void buttons_main_region_init(wmWindowManager *wm, ARegion *ar)
 	WM_event_add_keymap_handler(&ar->handlers, keymap);
 }
 
-static void buttons_main_region_draw(const bContext *C, ARegion *ar)
+static void buttons_main_region_layout_properties(const bContext *C, SpaceButs *sbuts, ARegion *ar)
 {
-	/* draw entirely, view changes should be handled here */
-	SpaceButs *sbuts = CTX_wm_space_buts(C);
 	const bool vertical = (sbuts->align == BUT_VERTICAL);
 
 	buttons_context_compute(C, sbuts);
 
-	if (sbuts->mainb == BCONTEXT_SCENE)
-		ED_region_panels(C, ar, "scene", sbuts->mainb, vertical);
-	else if (sbuts->mainb == BCONTEXT_RENDER)
-		ED_region_panels(C, ar, "render", sbuts->mainb, vertical);
-	else if (sbuts->mainb == BCONTEXT_RENDER_LAYER)
-		ED_region_panels(C, ar, "render_layer", sbuts->mainb, vertical);
-	else if (sbuts->mainb == BCONTEXT_WORLD)
-		ED_region_panels(C, ar, "world", sbuts->mainb, vertical);
-	else if (sbuts->mainb == BCONTEXT_OBJECT)
-		ED_region_panels(C, ar, "object", sbuts->mainb, vertical);
-	else if (sbuts->mainb == BCONTEXT_DATA)
-		ED_region_panels(C, ar, "data", sbuts->mainb, vertical);
-	else if (sbuts->mainb == BCONTEXT_MATERIAL)
-		ED_region_panels(C, ar, "material", sbuts->mainb, vertical);
-	else if (sbuts->mainb == BCONTEXT_TEXTURE)
-		ED_region_panels(C, ar, "texture", sbuts->mainb, vertical);
-	else if (sbuts->mainb == BCONTEXT_PARTICLE)
-		ED_region_panels(C, ar, "particle", sbuts->mainb, vertical);
-	else if (sbuts->mainb == BCONTEXT_PHYSICS)
-		ED_region_panels(C, ar, "physics", sbuts->mainb, vertical);
-	else if (sbuts->mainb == BCONTEXT_BONE)
-		ED_region_panels(C, ar, "bone", sbuts->mainb, vertical);
-	else if (sbuts->mainb == BCONTEXT_MODIFIER)
-		ED_region_panels(C, ar, "modifier", sbuts->mainb, vertical);
-	else if (sbuts->mainb == BCONTEXT_CONSTRAINT)
-		ED_region_panels(C, ar, "constraint", sbuts->mainb, vertical);
-	else if (sbuts->mainb == BCONTEXT_BONE_CONSTRAINT)
-		ED_region_panels(C, ar, "bone_constraint", sbuts->mainb, vertical);
+	const char *contexts[2] = {NULL, NULL};
+
+	switch (sbuts->mainb) {
+		case BCONTEXT_SCENE:
+			contexts[0] = "scene";
+			break;
+		case BCONTEXT_RENDER:
+			contexts[0] = "render";
+			break;
+		case BCONTEXT_VIEW_LAYER:
+			contexts[0] = "view_layer";
+			break;
+		case BCONTEXT_WORLD:
+			contexts[0] = "world";
+			break;
+		case BCONTEXT_WORKSPACE:
+			contexts[0] = "workspace";
+			break;
+		case BCONTEXT_OBJECT:
+			contexts[0] = "object";
+			break;
+		case BCONTEXT_DATA:
+			contexts[0] = "data";
+			break;
+		case BCONTEXT_MATERIAL:
+			contexts[0] = "material";
+			break;
+		case BCONTEXT_TEXTURE:
+			contexts[0] = "texture";
+			break;
+		case BCONTEXT_PARTICLE:
+			contexts[0] = "particle";
+			break;
+		case BCONTEXT_PHYSICS:
+			contexts[0] = "physics";
+			break;
+		case BCONTEXT_BONE:
+			contexts[0] = "bone";
+			break;
+		case BCONTEXT_MODIFIER:
+			contexts[0] = "modifier";
+			break;
+		case BCONTEXT_CONSTRAINT:
+			contexts[0] = "constraint";
+			break;
+		case BCONTEXT_BONE_CONSTRAINT:
+			contexts[0] = "bone_constraint";
+			break;
+		case BCONTEXT_TOOL:
+			contexts[0] = "tool";
+			break;
+	}
+
+	ED_region_panels_layout_ex(C, ar, contexts, sbuts->mainb, vertical);
+}
+
+static void buttons_main_region_layout_tool(const bContext *C, SpaceButs *sbuts, ARegion *ar)
+{
+	const bool vertical = (sbuts->align == BUT_VERTICAL);
+	const char *contexts[3] = {NULL};
+
+	const WorkSpace *workspace = CTX_wm_workspace(C);
+	if (workspace->tools_space_type == SPACE_VIEW3D) {
+		const int mode = CTX_data_mode_enum(C);
+		switch (mode) {
+			case CTX_MODE_EDIT_MESH:
+				ARRAY_SET_ITEMS(contexts, ".mesh_edit");
+				break;
+			case CTX_MODE_EDIT_CURVE:
+				ARRAY_SET_ITEMS(contexts, ".curve_edit");
+				break;
+			case CTX_MODE_EDIT_SURFACE:
+				ARRAY_SET_ITEMS(contexts, ".curve_edit");
+				break;
+			case CTX_MODE_EDIT_TEXT:
+				ARRAY_SET_ITEMS(contexts, ".todo");
+				break;
+			case CTX_MODE_EDIT_ARMATURE:
+				ARRAY_SET_ITEMS(contexts, ".armature_edit");
+				break;
+			case CTX_MODE_EDIT_METABALL:
+				ARRAY_SET_ITEMS(contexts, ".todo");
+				break;
+			case CTX_MODE_EDIT_LATTICE:
+				ARRAY_SET_ITEMS(contexts, ".todo");
+				break;
+			case CTX_MODE_POSE:
+				ARRAY_SET_ITEMS(contexts, ".posemode");
+				break;
+			case CTX_MODE_SCULPT:
+				ARRAY_SET_ITEMS(contexts, ".paint_common", ".sculpt_mode");
+				break;
+			case CTX_MODE_PAINT_WEIGHT:
+				ARRAY_SET_ITEMS(contexts, ".paint_common", ".weightpaint");
+				break;
+			case CTX_MODE_PAINT_VERTEX:
+				ARRAY_SET_ITEMS(contexts, ".paint_common", ".vertexpaint");
+				break;
+			case CTX_MODE_PAINT_TEXTURE:
+				ARRAY_SET_ITEMS(contexts, ".paint_common", ".imagepaint");
+				break;
+			case CTX_MODE_PARTICLE:
+				ARRAY_SET_ITEMS(contexts, ".particlemode");
+				break;
+			case CTX_MODE_OBJECT:
+				ARRAY_SET_ITEMS(contexts, ".todo");
+				break;
+		}
+	}
+	else if (workspace->tools_space_type == SPACE_IMAGE) {
+		/* TODO */
+	}
+
+	ED_region_panels_layout_ex(C, ar, contexts, -1, vertical);
+}
+
+static void buttons_main_region_layout(const bContext *C, ARegion *ar)
+{
+	/* draw entirely, view changes should be handled here */
+	SpaceButs *sbuts = CTX_wm_space_buts(C);
+
+	if (sbuts->mainb == BCONTEXT_TOOL) {
+		buttons_main_region_layout_tool(C, sbuts, ar);
+	}
+	else {
+		buttons_main_region_layout_properties(C, sbuts, ar);
+	}
 
 	sbuts->re_align = 0;
 	sbuts->mainbo = sbuts->mainb;
 }
 
+static void buttons_main_region_listener(
+        bScreen *UNUSED(sc), ScrArea *UNUSED(sa), ARegion *ar, wmNotifier *wmn,
+        const Scene *UNUSED(scene))
+{
+	/* context changes */
+	switch (wmn->category) {
+		case NC_SCREEN:
+			if (ELEM(wmn->data, ND_LAYER)) {
+				ED_region_tag_redraw(ar);
+			}
+			break;
+	}
+}
+
 static void buttons_operatortypes(void)
 {
-	WM_operatortype_append(BUTTONS_OT_toolbox);
+	WM_operatortype_append(BUTTONS_OT_context_menu);
 	WM_operatortype_append(BUTTONS_OT_file_browse);
 	WM_operatortype_append(BUTTONS_OT_directory_browse);
 }
@@ -187,7 +307,7 @@ static void buttons_keymap(struct wmKeyConfig *keyconf)
 {
 	wmKeyMap *keymap = WM_keymap_find(keyconf, "Property Editor", SPACE_BUTS, 0);
 
-	WM_keymap_add_item(keymap, "BUTTONS_OT_toolbox", RIGHTMOUSE, KM_PRESS, 0, 0);
+	WM_keymap_add_item(keymap, "BUTTONS_OT_context_menu", RIGHTMOUSE, KM_PRESS, 0, 0);
 }
 
 /* add handlers, stuff you only do once or on area/region changes */
@@ -206,6 +326,28 @@ static void buttons_header_region_draw(const bContext *C, ARegion *ar)
 	ED_region_header(C, ar);
 }
 
+static void buttons_header_region_message_subscribe(
+        const bContext *UNUSED(C),
+        WorkSpace *UNUSED(workspace), Scene *UNUSED(scene),
+        bScreen *UNUSED(screen), ScrArea *sa, ARegion *ar,
+        struct wmMsgBus *mbus)
+{
+	SpaceButs *sbuts = sa->spacedata.first;
+	wmMsgSubscribeValue msg_sub_value_region_tag_redraw = {
+		.owner = ar,
+		.user_data = ar,
+		.notify = ED_region_do_msg_notify_tag_redraw,
+	};
+
+	/* Don't check for SpaceButs.mainb here, we may toggle between view-layers
+	 * where one has no active object, so that available contexts changes. */
+	WM_msg_subscribe_rna_anon_prop(mbus, Window, view_layer, &msg_sub_value_region_tag_redraw);
+
+	if (!ELEM(sbuts->mainb, BCONTEXT_RENDER, BCONTEXT_SCENE, BCONTEXT_WORLD)) {
+		WM_msg_subscribe_rna_anon_prop(mbus, ViewLayer, name, &msg_sub_value_region_tag_redraw);
+	}
+}
+
 /* draw a certain button set only if properties area is currently
  * showing that button set, to reduce unnecessary drawing. */
 static void buttons_area_redraw(ScrArea *sa, short buttons)
@@ -218,7 +360,9 @@ static void buttons_area_redraw(ScrArea *sa, short buttons)
 }
 
 /* reused! */
-static void buttons_area_listener(bScreen *UNUSED(sc), ScrArea *sa, wmNotifier *wmn)
+static void buttons_area_listener(
+        bScreen *UNUSED(sc), ScrArea *sa, wmNotifier *wmn, Scene *UNUSED(scene),
+        WorkSpace *UNUSED(workspace))
 {
 	SpaceButs *sbuts = sa->spacedata.first;
 
@@ -228,7 +372,7 @@ static void buttons_area_listener(bScreen *UNUSED(sc), ScrArea *sa, wmNotifier *
 			switch (wmn->data) {
 				case ND_RENDER_OPTIONS:
 					buttons_area_redraw(sa, BCONTEXT_RENDER);
-					buttons_area_redraw(sa, BCONTEXT_RENDER_LAYER);
+					buttons_area_redraw(sa, BCONTEXT_VIEW_LAYER);
 					break;
 				case ND_WORLD:
 					buttons_area_redraw(sa, BCONTEXT_WORLD);
@@ -467,7 +611,9 @@ void ED_spacetype_buttons(void)
 	art = MEM_callocN(sizeof(ARegionType), "spacetype buttons region");
 	art->regionid = RGN_TYPE_WINDOW;
 	art->init = buttons_main_region_init;
-	art->draw = buttons_main_region_draw;
+	art->layout = buttons_main_region_layout;
+	art->draw = ED_region_panels_draw;
+	art->listener = buttons_main_region_listener;
 	art->keymapflag = ED_KEYMAP_UI | ED_KEYMAP_FRAMES;
 	BLI_addhead(&st->regiontypes, art);
 
@@ -481,6 +627,7 @@ void ED_spacetype_buttons(void)
 
 	art->init = buttons_header_region_init;
 	art->draw = buttons_header_region_draw;
+	art->message_subscribe = buttons_header_region_message_subscribe;
 	BLI_addhead(&st->regiontypes, art);
 
 	BKE_spacetype_register(st);