Add btn like signal handling for knob part. Add custom event to distuinguish from VALUE_CHANGED

src/lv_core/lv_obj.h

@@ -102,6 +102,7 @@ enum {
     LV_EVENT_APPLY,  /**< "Ok", "Apply" or similar specific button has clicked*/
     LV_EVENT_CANCEL, /**< "Close", "Cancel" or similar specific button has clicked*/
     LV_EVENT_DELETE, /**< Object is being deleted */
+    _LV_EVENT_LAST /** Number of events*/
 };
 typedef uint8_t lv_event_t; /**< Type of event being sent to the object. */
 

src/lv_widgets/lv_rotary.c

@@ -87,6 +87,7 @@ lv_obj_t * lv_rotary_create(lv_obj_t * par, const lv_obj_t * copy)
     ext->min_value = 0;
     ext->max_value = 0;
     ext->dragging = false;
+    ext->checkable = 0;
     lv_style_list_init(&ext->style_knob);
 
     /*The signal and design functions are not copied so set them here*/
@@ -108,6 +109,8 @@ lv_obj_t * lv_rotary_create(lv_obj_t * par, const lv_obj_t * copy)
         ext->min_value = copy_ext->min_value;
         ext->max_value = copy_ext->max_value;
         ext->dragging = copy_ext->dragging;
+        ext->sym = copy_ext->sym;
+        ext->checkable = copy_ext->checkable;
         lv_style_list_copy(&ext->style_knob, &copy_ext->style_knob);
 
         lv_obj_refresh_style(rotary, LV_OBJ_PART_ALL);
@@ -192,6 +195,20 @@ void lv_rotary_set_symmetric(lv_obj_t * rotary, bool en)
     lv_obj_invalidate(rotary);
 }
 
+/**
+ * Enable the toggled states
+ * @param rotary pointer to a button object
+ * @param tgl true: enable toggled states, false: disable
+ */
+void lv_rotary_set_checkable(lv_obj_t * rotary, bool tgl)
+{
+    LV_ASSERT_OBJ(rotary, LV_OBJX_NAME);
+
+    lv_rotary_ext_t * ext = (lv_rotary_ext_t *)lv_obj_get_ext_attr(rotary);
+
+    ext->checkable = tgl != false ? 1 : 0;
+}
+
 /*=====================
  * Getter functions
  *====================*/
@@ -248,6 +265,20 @@ bool lv_rotary_is_dragged(const lv_obj_t * rotary)
     return ext->dragging;
 }
 
+/**
+ * Get the toggle enable attribute of the rotary
+ * @param rotary pointer to a rotary object
+ * @return true: toggle enabled, false: disabled
+ */
+bool lv_rotary_get_checkable(const lv_obj_t * rotary)
+{
+    LV_ASSERT_OBJ(rotary, LV_OBJX_NAME);
+
+    lv_rotary_ext_t * ext = (lv_rotary_ext_t *)lv_obj_get_ext_attr(rotary);
+
+    return ext->checkable != 0 ? true : false;
+}
+
 /**********************
  *   STATIC FUNCTIONS
  **********************/
@@ -305,6 +336,7 @@ static lv_res_t lv_rotary_signal(lv_obj_t * rotary, lv_signal_t sign, void * par
     if(res != LV_RES_OK) return res;
     if(sign == LV_SIGNAL_GET_TYPE) return lv_obj_handle_get_type_signal(param, LV_OBJX_NAME);
 
+    bool tgl = lv_rotary_get_checkable(rotary);
     lv_rotary_ext_t * ext = lv_obj_get_ext_attr(rotary);
     lv_point_t p;
 
@@ -320,6 +352,23 @@ static lv_res_t lv_rotary_signal(lv_obj_t * rotary, lv_signal_t sign, void * par
         ext->dragging = false;
         ext->value_to_set = NULL;
 
+        /*If not dragged and it was not long press action then
+         *change state and run the action*/
+        if(lv_indev_is_dragging(param) == false && tgl) {
+            uint32_t toggled = 0;
+            if(lv_obj_get_state(rotary, LV_ROTARY_PART_KNOB) & LV_STATE_CHECKED) {
+                lv_btn_set_state(rotary, LV_ROTARY_STATE_RELEASED);
+                toggled = 0;
+            }
+            else {
+                lv_btn_set_state(rotary, LV_ROTARY_STATE_CHECKED_RELEASED);
+                toggled = 1;
+            }
+
+            res = lv_event_send(rotary, LV_EVENT_ROTARY_TOGGLED, &toggled);
+            if(res != LV_RES_OK) return res;
+        }
+
 #if LV_USE_GROUP
         /*Leave edit mode if released. (No need to wait for LONG_PRESS) */
         lv_group_t * g             = lv_obj_get_group(rotary);

src/lv_widgets/lv_rotary.h

@@ -69,6 +69,7 @@ typedef struct {
     int16_t * value_to_set; /*Start value of the rotary*/
     uint16_t dragging   :1;
     uint16_t sym        :1;
+    uint8_t checkable   :1; /* 1: Toggle enabled*/
 } lv_rotary_ext_t;
 
 /** Built-in styles of rotary*/
@@ -79,6 +80,13 @@ enum {
     _LV_ROTARY_PART_VIRTUAL_LAST
 };
 
+/** Custom events of rotary*/
+enum {
+    LV_EVENT_ROTARY_TOGGLED = _LV_EVENT_LAST
+};
+typedef uint8_t lv_rotary_event_t;
+
+
 /**********************
  * GLOBAL PROTOTYPES
  **********************/
@@ -184,16 +192,30 @@ static inline void lv_rotary_set_rotation(lv_obj_t * rotary, uint16_t rotation_a
     lv_arc_set_rotation(rotary, rotation_angle);
 }
 
+/**
+ * Enable the toggled states
+ * @param rotary pointer to a rotary object
+ * @param tgl true: enable toggled states, false: disable
+ */
+void lv_rotary_set_checkable(lv_obj_t * rotary, bool tgl)
+
 /**
  * Set the state of the rotary
  * @param rotary pointer to a rotary object
  * @param state the new state of the rotary (from lv_rotary_state_t enum)
  */
-static inline void lv_rotary_set_state(lv_obj_t * rotary, lv_rotary_state_t state)
-{
+static inline void lv_rotary_set_state(lv_obj_t * rotary, lv_rotary_state_t state) {
     lv_btn_set_state(rotary, state);
 }
 
+/**
+ * Toggle the state of the rotary (ON->OFF, OFF->ON)
+ * @param rotary pointer to a rotary object
+ */
+static inline void lv_rotary_toggle(lv_obj_t * rotary) {
+    lv_btn_toggle(rotary);
+}
+
 /*=====================
  * Getter functions
  *====================*/
@@ -273,6 +295,23 @@ static inline bool lv_rotary_get_symmetric(lv_obj_t * rotary)
     return ext->sym;
 }
 
+/**
+ * Get the current state of the rotary
+ * @param rotary pointer to a rotary object
+ * @return the state of the rotary (from lv_rotary_state_t enum).
+ * If the rotary is in disabled state `LV_ROTARY_STATE_DISABLED` will be ORed to the other rotary states.
+ */
+static inline lv_btn_state_t lv_rotary_get_state(const lv_obj_t * rotary) {
+    return lv_btn_get_state(rotary);
+}
+
+/**
+ * Get the toggle enable attribute of the rotary
+ * @param rotary pointer to a rotary object
+ * @return true: toggle enabled, false: disabled
+ */
+bool lv_rotary_get_checkable(const lv_obj_t * rotary)
+
 /**********************
  *      MACROS
  **********************/