feat(nuttx): add indev cursor display (#7021)

Signed-off-by: jianglianfang <jianglianfang@xiaomi.com>

Kconfig

@@ -1829,6 +1829,13 @@ menu "LVGL configuration"
 			depends on LV_USE_NUTTX
 			default n
 
+		config LV_NUTTX_TOUCHSCREEN_CURSOR_SIZE
+			int "Touchscreen cursor size in pixels"
+			depends on LV_USE_NUTTX_TOUCHSCREEN
+			default 0
+			help 
+				Set to 0 to disable cursor, or set to a value greater than 0 to set the cursor size in pixels.
+
 		config LV_USE_LINUX_DRM
 			bool "Use Linux DRM device"
 			default n

lv_conf_template.h

@@ -1126,6 +1126,9 @@
 
     /** Driver for /dev/input */
     #define LV_USE_NUTTX_TOUCHSCREEN    0
+
+    /*Touchscreen cursor size in pixels(<=0: disable cursor)*/
+    #define LV_NUTTX_TOUCHSCREEN_CURSOR_SIZE    0
 #endif
 
 /** Driver for /dev/dri/card */

src/drivers/nuttx/lv_nuttx_touchscreen.c

@@ -43,6 +43,7 @@ typedef struct {
 /**********************
  *  STATIC PROTOTYPES
  **********************/
+static void indev_set_cursor(lv_indev_t * indev, int32_t size);
 static void touchscreen_read(lv_indev_t * drv, lv_indev_data_t * data);
 static void touchscreen_delete_cb(lv_event_t * e);
 static lv_indev_t * touchscreen_init(int fd);
@@ -80,6 +81,8 @@ lv_indev_t * lv_nuttx_touchscreen_create(const char * dev_path)
         close(fd);
     }
 
+    indev_set_cursor(indev, LV_NUTTX_TOUCHSCREEN_CURSOR_SIZE);
+
     return indev;
 }
 
@@ -87,6 +90,32 @@ lv_indev_t * lv_nuttx_touchscreen_create(const char * dev_path)
  *   STATIC FUNCTIONS
  **********************/
 
+static void indev_set_cursor(lv_indev_t * indev, int32_t size)
+{
+    lv_obj_t * cursor_obj = lv_indev_get_cursor(indev);
+    if(size <= 0) {
+        if(cursor_obj) {
+            lv_obj_delete(cursor_obj);
+            lv_indev_set_cursor(indev, NULL);
+        }
+    }
+    else {
+        if(cursor_obj == NULL) {
+            cursor_obj = lv_obj_create(lv_layer_sys());
+            lv_obj_remove_style_all(cursor_obj);
+            lv_obj_set_style_radius(cursor_obj, LV_RADIUS_CIRCLE, 0);
+            lv_obj_set_style_bg_opa(cursor_obj, LV_OPA_50, 0);
+            lv_obj_set_style_bg_color(cursor_obj, lv_color_black(), 0);
+            lv_obj_set_style_border_width(cursor_obj, 2, 0);
+            lv_obj_set_style_border_color(cursor_obj, lv_palette_main(LV_PALETTE_GREY), 0);
+        }
+        lv_obj_set_size(cursor_obj, size, size);
+        lv_obj_set_style_translate_x(cursor_obj, -size / 2, 0);
+        lv_obj_set_style_translate_y(cursor_obj, -size / 2, 0);
+        lv_indev_set_cursor(indev, cursor_obj);
+    }
+}
+
 static void conv_touch_sample(lv_indev_t * drv,
                               lv_indev_data_t * data,
                               struct touch_sample_s * sample)
@@ -163,7 +192,7 @@ static void touchscreen_delete_cb(lv_event_t * e)
     if(touchscreen) {
         lv_indev_set_driver_data(indev, NULL);
         lv_indev_set_read_cb(indev, NULL);
-
+        indev_set_cursor(indev, -1);
         if(touchscreen->fd >= 0) {
             close(touchscreen->fd);
             touchscreen->fd = -1;

src/indev/lv_indev.c

@@ -519,6 +519,12 @@ void lv_indev_get_vect(const lv_indev_t * indev, lv_point_t * point)
     }
 }
 
+lv_obj_t * lv_indev_get_cursor(lv_indev_t * indev)
+{
+    if(indev == NULL) return NULL;
+    return indev->cursor;
+}
+
 void lv_indev_wait_release(lv_indev_t * indev)
 {
     if(indev == NULL)return;

src/indev/lv_indev.h

@@ -319,6 +319,13 @@ lv_obj_t * lv_indev_get_scroll_obj(const lv_indev_t * indev);
  */
 void lv_indev_get_vect(const lv_indev_t * indev, lv_point_t * point);
 
+/**
+ * Get the cursor object of an input device (for LV_INDEV_TYPE_POINTER only)
+ * @param indev pointer to an input device
+ * @return pointer to the cursor object
+ */
+lv_obj_t * lv_indev_get_cursor(lv_indev_t * indev);
+
 /**
  * Do nothing until the next release
  * @param indev pointer to an input device

src/lv_conf_internal.h

@@ -3655,6 +3655,15 @@
             #define LV_USE_NUTTX_TOUCHSCREEN    0
         #endif
     #endif
+
+    /*Touchscreen cursor size in pixels(<=0: disable cursor)*/
+    #ifndef LV_NUTTX_TOUCHSCREEN_CURSOR_SIZE
+        #ifdef CONFIG_LV_NUTTX_TOUCHSCREEN_CURSOR_SIZE
+            #define LV_NUTTX_TOUCHSCREEN_CURSOR_SIZE CONFIG_LV_NUTTX_TOUCHSCREEN_CURSOR_SIZE
+        #else
+            #define LV_NUTTX_TOUCHSCREEN_CURSOR_SIZE    0
+        #endif
+    #endif
 #endif
 
 /** Driver for /dev/dri/card */