lv_group: add lv_group.c,h

lv_obj/lv_group.c

+/**
+ * @file lv_group.c
+ *
+ */
+
+/*********************
+ *      INCLUDES
+ *********************/
+#include <stddef.h>
+#include "lv_group.h"
+
+/*********************
+ *      DEFINES
+ *********************/
+
+/**********************
+ *      TYPEDEFS
+ **********************/
+
+/**********************
+ *  STATIC PROTOTYPES
+ **********************/
+static void style_activate_def(lv_style_t * style);
+
+/**********************
+ *  STATIC VARIABLES
+ **********************/
+
+/**********************
+ *      MACROS
+ **********************/
+
+/**********************
+ *   GLOBAL FUNCTIONS
+ **********************/
+
+lv_group_t * lv_group_create(void)
+{
+    lv_group_t * group = dm_alloc(sizeof(lv_group_t));
+    ll_init(&group->obj_ll, sizeof(lv_obj_t *));
+
+    group->style_activate = style_activate_def;
+    group->actve_obj = NULL;
+
+    return group;
+}
+
+void lv_group_add(lv_group_t * group, lv_obj_t * obj)
+{
+    obj->group_p = group;
+    lv_obj_t ** next = ll_ins_tail(&group->obj_ll);
+    *next = obj;
+}
+
+void lv_group_activate_obj(lv_group_t * group, lv_obj_t * obj)
+{
+
+}
+
+void lv_group_set_style_cb(lv_group_t * group, void (*style_cb)(lv_style_t * style))
+{
+    group->style_activate = style_cb;
+}
+
+void lv_group_activate_next(lv_group_t * group)
+{
+    if(group->actve_obj != NULL) lv_obj_inv(*group->actve_obj);
+
+    lv_obj_t ** obj_next;
+    if(group->actve_obj == NULL) obj_next = ll_get_head(&group->obj_ll);
+    else obj_next = ll_get_next(&group->obj_ll, group->actve_obj);
+
+    if(obj_next == NULL) obj_next = ll_get_head(&group->obj_ll);
+    group->actve_obj = obj_next;
+
+    if(group->actve_obj != NULL) lv_obj_inv(*group->actve_obj);
+}
+
+void lv_group_activate_prev(lv_group_t * group)
+{
+    if(group->actve_obj != NULL) lv_obj_inv(*group->actve_obj);
+
+    lv_obj_t ** obj_next;
+    if(group->actve_obj == NULL) obj_next = ll_get_tail(&group->obj_ll);
+    else obj_next = ll_get_prev(&group->obj_ll, group->actve_obj);
+
+    if(obj_next == NULL) obj_next = ll_get_tail(&group->obj_ll);
+    group->actve_obj = obj_next;
+
+    if(group->actve_obj != NULL) lv_obj_inv(*group->actve_obj);
+
+}
+
+/**********************
+ *   STATIC FUNCTIONS
+ **********************/
+
+static void style_activate_def(lv_style_t * style)
+{
+    style->bcolor = COLOR_ORANGE;
+    style->bopa = OPA_COVER;
+    style->bwidth = style->bwidth * 2;
+    style->mcolor = color_mix(style->mcolor, COLOR_ORANGE, OPA_80);
+    style->gcolor = color_mix(style->gcolor, COLOR_ORANGE, OPA_80);
+}

lv_obj/lv_group.h

+/**
+ * @file lv_group.h
+ *
+ */
+
+#ifndef LV_GROUP_H
+#define LV_GROUP_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*********************
+ *      INCLUDES
+ *********************/
+#include "lv_obj.h"
+
+/*********************
+ *      DEFINES
+ *********************/
+
+/**********************
+ *      TYPEDEFS
+ **********************/
+typedef struct
+{
+    ll_dsc_t obj_ll;
+    lv_obj_t ** actve_obj;
+    void (*style_activate)(lv_style_t * style);
+    lv_style_t style_tmp;
+}lv_group_t;
+
+/**********************
+ * GLOBAL PROTOTYPES
+ **********************/
+lv_group_t * lv_group_create(void);
+void lv_group_add(lv_group_t * group, lv_obj_t * obj);
+void lv_group_activate_obj(lv_group_t * group, lv_obj_t * obj);
+void lv_group_activate_next(lv_group_t * group);
+void lv_group_activate_prev(lv_group_t * group);
+
+/**********************
+ *      MACROS
+ **********************/
+
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+#endif /*LV_GROUP_H*/

lv_obj/lv_obj.c

@@ -12,6 +12,7 @@
 #include "lvgl/lv_obj/lv_dispi.h"
 #include "lvgl/lv_obj/lv_obj.h"
 #include "lvgl/lv_obj/lv_refr.h"
+#include "lvgl/lv_obj/lv_group.h"
 #include "lvgl/lv_app/lv_app.h"
 #include "lvgl/lv_draw/lv_draw_rbasic.h"
 #include "misc/gfx/anim.h"
@@ -1234,20 +1235,35 @@ cord_t lv_obj_get_ext_size(lv_obj_t * obj)
  */
 lv_style_t * lv_obj_get_style(lv_obj_t * obj)
 {
-    if(obj->style_p != NULL) return obj->style_p;
-    else {
+    lv_style_t * style_act = obj->style_p;
+    if(style_act == NULL) {
         lv_obj_t * par = obj->par;
 
         while(par != NULL) {
             if(par->style_p != NULL) {
-                if(par->style_p->glass == 0) return par->style_p;
+                if(par->style_p->glass == 0) {
+                    style_act = par->style_p;
+                    break;
+                }
             }
             par = par->par;
         }
     }
 
-    /*Never reach this, at least the screen has to be a style*/
-    return NULL;
+    if(obj->group_p != NULL) {
+        lv_obj_t * active_obj = NULL;
+        if(((lv_group_t *)obj->group_p)->actve_obj != NULL) {
+            active_obj = *((lv_group_t *)obj->group_p)->actve_obj;
+        }
+
+        if(active_obj == obj) {
+            lv_style_cpy(&((lv_group_t *)obj->group_p)->style_tmp, style_act);
+            ((lv_group_t *)obj->group_p)->style_activate(&((lv_group_t *)obj->group_p)->style_tmp);
+            style_act = &((lv_group_t *)obj->group_p)->style_tmp;
+        }
+    }
+
+    return style_act;
 }
 
 /*-----------------

lv_obj/lv_obj.h

@@ -106,6 +106,8 @@ typedef struct __LV_OBJ_T
     void * free_p;              /*Application specific pointer (set it freely)*/
 #endif
 
+    void * group_p;             /*Pointer to the group of the object*/
+
     /*Attributes and states*/
     uint8_t click_en     :1;    /*1: Can be pressed by a display input device*/
     uint8_t drag_en      :1;    /*1: Enable the dragging*/
@@ -159,13 +161,6 @@ typedef enum
     LV_ALIGN_OUT_RIGHT_BOTTOM,
 }lv_align_t;
 
-
-typedef struct
-{
-	color_t color;
-    opa_t opa;
-}lv_objs_t;
-
 typedef enum
 {
 	LV_ANIM_NONE = 0,
@@ -473,6 +468,7 @@ void lv_obj_set_free_num(lv_obj_t * obj, uint8_t free_num);
  */
 void lv_obj_set_free_p(lv_obj_t * obj, void * free_p);
 #endif
+
 /**
  * Animate an object
  * @param obj pointer to an object to animate

lvgl.h

@@ -17,6 +17,7 @@ extern "C" {
 /*Test misc. module version*/
 #include "misc/misc.h"
 #include "lv_obj/lv_obj.h"
+#include "lv_obj/lv_group.h"
 #include "lv_objx/lv_btn.h"
 #include "lv_objx/lv_img.h"
 #include "lv_objx/lv_label.h"