select parent/child in object mode with [] keys, like pose mode.

also needed to extend the RNA api to allow C to set enums without meaningful values.

release/scripts/op/object.py

@@ -96,6 +96,48 @@ class SelectCamera(bpy.types.Operator):
         return {'FINISHED'}
 
 
+class SelectHierarchy(bpy.types.Operator):
+    '''Select object relative to the active objects position in the hierarchy'''
+    bl_idname = "object.select_hierarchy"
+    bl_label = "Select Hierarchy"
+    bl_register = True
+    bl_undo = True
+
+    direction = EnumProperty(items=(
+                        ('PARENT', "Parent", ""),
+                        ('CHILD', "Child", "")),
+                name="Direction",
+                description="Direction to select in the hierarchy",
+                default='PARENT')
+
+    extend = BoolProperty(name="Extend", description="Extend the existing selection", default=False)
+
+    def poll(self, context):
+        return context.object
+
+    def execute(self, context):
+        obj = context.object
+        if self.properties.direction == 'PARENT':
+            parent = obj.parent
+            if not parent:
+                return {'CANCELLED'}
+            obj_act = parent
+        else:
+            children = obj.children
+            if len(children) != 1:
+                return {'CANCELLED'}
+            obj_act = children[0]
+
+        if not self.properties.extend:
+            # obj.selected = False
+            bpy.ops.object.select_all(action='DESELECT')
+
+        obj_act.selected = True
+        context.scene.objects.active = obj_act
+
+        return {'FINISHED'}
+
+
 class SubdivisionSet(bpy.types.Operator):
     '''Sets a Subdivision Surface Level (1-5)'''
 
@@ -471,6 +513,7 @@ class MakeDupliFace(bpy.types.Operator):
 classes = [
     SelectPattern,
     SelectCamera,
+    SelectHierarchy,
     SubdivisionSet,
     ShapeTransfer,
     JoinUVs,

source/blender/editors/object/object_ops.c

@@ -289,6 +289,18 @@ void ED_keymap_object(wmKeyConfig *keyconf)
 	WM_keymap_add_item(keymap, "OBJECT_OT_select_grouped", GKEY, KM_PRESS, KM_SHIFT, 0);
 	WM_keymap_add_item(keymap, "OBJECT_OT_select_mirror", MKEY, KM_PRESS, KM_CTRL|KM_SHIFT, 0);
 	
+	kmi= WM_keymap_add_item(keymap, "OBJECT_OT_select_hierarchy", LEFTBRACKETKEY, KM_PRESS, 0, 0);
+		RNA_enum_set_identifier(kmi->ptr, "direction", "PARENT");
+	kmi= WM_keymap_add_item(keymap, "OBJECT_OT_select_hierarchy", LEFTBRACKETKEY, KM_PRESS, KM_SHIFT, 0);
+		RNA_enum_set_identifier(kmi->ptr, "direction", "PARENT");
+		RNA_boolean_set(kmi->ptr, "extend", 1);
+
+	kmi= WM_keymap_add_item(keymap, "OBJECT_OT_select_hierarchy", RIGHTBRACKETKEY, KM_PRESS, 0, 0);
+		RNA_enum_set_identifier(kmi->ptr, "direction", "CHILD");
+	kmi= WM_keymap_add_item(keymap, "OBJECT_OT_select_hierarchy", RIGHTBRACKETKEY, KM_PRESS, KM_SHIFT, 0);
+		RNA_enum_set_identifier(kmi->ptr, "direction", "CHILD");
+		RNA_boolean_set(kmi->ptr, "extend", 1);
+
 	WM_keymap_verify_item(keymap, "OBJECT_OT_parent_set", PKEY, KM_PRESS, KM_CTRL, 0);
 	WM_keymap_verify_item(keymap, "OBJECT_OT_parent_no_inverse_set", PKEY, KM_PRESS, KM_CTRL|KM_SHIFT, 0);
 	WM_keymap_verify_item(keymap, "OBJECT_OT_parent_clear", PKEY, KM_PRESS, KM_ALT, 0);

source/blender/makesrna/RNA_access.h

@@ -809,6 +809,7 @@ void RNA_float_set_array(PointerRNA *ptr, const char *name, const float *values)
 
 int RNA_enum_get(PointerRNA *ptr, const char *name);
 void RNA_enum_set(PointerRNA *ptr, const char *name, int value);
+void RNA_enum_set_identifier(PointerRNA *ptr, const char *name, const char *id);
 int RNA_enum_is_equal(struct bContext *C, PointerRNA *ptr, const char *name, const char *enumname);
 
 /* lower level functions that donr use a PointerRNA */

source/blender/makesrna/intern/rna_access.c

@@ -3295,6 +3295,20 @@ void RNA_enum_set(PointerRNA *ptr, const char *name, int value)
 		printf("RNA_enum_set: %s.%s not found.\n", ptr->type->identifier, name);
 }
 
+void RNA_enum_set_identifier(PointerRNA *ptr, const char *name, const char *id)
+{
+	PropertyRNA *prop= RNA_struct_find_property(ptr, name);
+
+	if(prop) {
+		int value;
+		if(RNA_property_enum_value(NULL, ptr, prop, id, &value))
+			RNA_property_enum_set(ptr, prop, value);
+		else
+			printf("RNA_enum_set_identifier: %s.%s has no enum id '%s'.\n", ptr->type->identifier, name, id);
+	} else
+		printf("RNA_enum_set_identifier: %s.%s not found.\n", ptr->type->identifier, name);
+}
+
 int RNA_enum_is_equal(bContext *C, PointerRNA *ptr, const char *name, const char *enumname)
 {
 	PropertyRNA *prop= RNA_struct_find_property(ptr, name);