allow set_root_group for FrameBufferDisplay instead of show()

Author: FoamyGuy

shared-bindings/framebufferio/FramebufferDisplay.c

@@ -328,8 +328,24 @@ STATIC mp_obj_t framebufferio_framebufferdisplay_obj_get_root_group(mp_obj_t sel
 }
 MP_DEFINE_CONST_FUN_OBJ_1(framebufferio_framebufferdisplay_get_root_group_obj, framebufferio_framebufferdisplay_obj_get_root_group);
 
-MP_PROPERTY_GETTER(framebufferio_framebufferdisplay_root_group_obj,
-    (mp_obj_t)&framebufferio_framebufferdisplay_get_root_group_obj);
+STATIC mp_obj_t framebufferio_framebufferdisplay_obj_set_root_group(mp_obj_t self_in, mp_obj_t group_in) {
+    framebufferio_framebufferdisplay_obj_t *self = native_display(self_in);
+    displayio_group_t *group = NULL;
+    if (group_in != mp_const_none) {
+        group = MP_OBJ_TO_PTR(native_group(group_in));
+    }
+
+    bool ok = common_hal_framebufferio_framebufferdisplay_set_root_group(self, group);
+    if (!ok) {
+        mp_raise_ValueError(translate("Group already used"));
+    }
+    return mp_const_none;
+}
+MP_DEFINE_CONST_FUN_OBJ_2(framebufferio_framebufferdisplay_set_root_group_obj, framebufferio_framebufferdisplay_obj_set_root_group);
+
+MP_PROPERTY_GETSET(framebufferio_framebufferdisplay_root_group_obj,
+    (mp_obj_t)&framebufferio_framebufferdisplay_get_root_group_obj,
+    (mp_obj_t)&framebufferio_framebufferdisplay_set_root_group_obj);
 
 STATIC const mp_rom_map_elem_t framebufferio_framebufferdisplay_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_show), MP_ROM_PTR(&framebufferio_framebufferdisplay_show_obj) },

shared-bindings/framebufferio/FramebufferDisplay.h

@@ -61,5 +61,6 @@ bool common_hal_framebufferio_framebufferdisplay_set_brightness(framebufferio_fr
 mp_obj_t common_hal_framebufferio_framebufferdisplay_framebuffer(framebufferio_framebufferdisplay_obj_t *self);
 
 mp_obj_t common_hal_framebufferio_framebufferdisplay_get_root_group(framebufferio_framebufferdisplay_obj_t *self);
+mp_obj_t common_hal_framebufferio_framebufferdisplay_set_root_group(framebufferio_framebufferdisplay_obj_t *self, displayio_group_t *root_group);
 
 #endif // MICROPY_INCLUDED_SHARED_BINDINGS_DISPLAYIO_FRAMEBUFFERDISPLAY_H

shared-module/framebufferio/FramebufferDisplay.c

@@ -362,3 +362,11 @@ void framebufferio_framebufferdisplay_reset(framebufferio_framebufferdisplay_obj
 mp_obj_t common_hal_framebufferio_framebufferdisplay_get_root_group(framebufferio_framebufferdisplay_obj_t *self) {
     return self->core.current_group;
 }
+
+mp_obj_t common_hal_framebufferio_framebufferdisplay_set_root_group(framebufferio_framebufferdisplay_obj_t *self, displayio_group_t *root_group) {
+    bool ok = displayio_display_core_set_root_group(&self->core, root_group);
+    if (!ok) {
+        mp_raise_ValueError(translate("Group already used"));
+    }
+    return mp_const_none;
+}