lv_img: add multi language support

lv_objx/lv_img.c

@@ -14,6 +14,7 @@
 #error "lv_img: lv_label is required. Enable it in lv_conf.h (USE_LV_LABEL  1) "
 #endif
 
+#include "../lv_core/lv_lang.h"
 #include "../lv_themes/lv_theme.h"
 #include "../lv_misc/lv_fs.h"
 #include "../lv_misc/lv_ufs.h"
@@ -202,6 +203,24 @@ void lv_img_set_src(lv_obj_t * img, const void * src_img)
     lv_obj_invalidate(img);
 }
 
+/**
+ * Set an ID which means a the same source but on different languages
+ * @param img pointer to an image object
+ * @param src_id ID of the source
+ */
+void lv_img_set_src_multi(lv_obj_t * img, uint32_t txt_id)
+{
+#if USE_LV_MULTI_LANG
+    lv_img_ext_t * ext = lv_obj_get_ext_attr(img);
+    ext->lang_txt_id = txt_id;
+
+    /*Apply the new language*/
+    img->signal_func(img, LV_SIGNAL_LANG_CHG, NULL);
+#else
+    LV_LOG_WARN("lv_img_set_src_multi: multiple languages are not enabled. See lv_conf.h USE_LV_MULTI_LANG ")
+#endif
+}
+
 /**
  * Enable the auto size feature.
  * If enabled the object size will be same as the picture size.
@@ -350,6 +369,17 @@ static lv_res_t lv_img_signal(lv_obj_t * img, lv_signal_t sign, void * param)
             lv_img_set_src(img, ext->src);
 
         }
+    } else if(sign == LV_SIGNAL_LANG_CHG) {
+#if USE_LV_MULTI_LANG
+        if(ext->lang_txt_id != LV_LANG_TXT_ID_NONE) {
+            const char * lang_src = lv_lang_get_text(ext->lang_txt_id);
+            if(lang_src) {
+                lv_img_set_src(img, lang_src);
+            } else {
+                LV_LOG_WARN("lv_lang_get_text return NULL for an image's source");
+            }
+        }
+#endif
     } else if(sign == LV_SIGNAL_GET_TYPE) {
         lv_obj_type_t * buf = param;
         uint8_t i;

lv_objx/lv_img.h

@@ -43,6 +43,9 @@ typedef struct
 
     lv_coord_t w;               /*Width of the image (Handled by the library)*/
     lv_coord_t h;               /*Height of the image (Handled by the library)*/
+#if USE_LV_MULTI_LANG
+    uint16_t lang_txt_id;       /*The ID of the image to display. */
+#endif
     uint8_t src_type  :2;       /*See: lv_img_src_t*/
     uint8_t auto_size :1;       /*1: automatically set the object size to the image size*/
     uint8_t cf :5;              /*Color format from `lv_img_color_format_t`*/
@@ -71,6 +74,14 @@ lv_obj_t * lv_img_create(lv_obj_t * par, const lv_obj_t * copy);
  */
 void lv_img_set_src(lv_obj_t * img, const void * src_img);
 
+/**
+ * Set an ID which means a the same source but on different languages
+ * @param img pointer to an image object
+ * @param src_id ID of the source
+ */
+void lv_img_set_src_multi(lv_obj_t * img, uint32_t txt_id);
+
+
 /**
  * Obsolete since v5.1. Just for compatibility with v5.0. Will be removed in v6.0.
  * Use 'lv_img_set_src()' instead.

lv_objx/lv_label.h

@@ -70,7 +70,7 @@ typedef struct
 #endif
 
 #if USE_LV_MULTI_LANG
-    uint16_t lang_txt_id;            /*The ID of the text to to display*/
+    uint16_t lang_txt_id;            /*The ID of the text to display*/
 #endif
     uint16_t dot_end;               /*The text end position in dot mode (Handled by the library)*/
     uint16_t anim_speed;            /*Speed of scroll and roll animation in px/sec unit*/
@@ -123,14 +123,13 @@ void lv_label_set_array_text(lv_obj_t * label, const char * array, uint16_t size
  */
 void lv_label_set_static_text(lv_obj_t * label, const char * text);
 
-
-
 /**
  *Set a text ID which means a the same text but on different languages
  * @param label pointer to a label object
  * @param txt_id ID of the text
  */
 void lv_label_set_text_lang(lv_obj_t * label, uint32_t txt_id);
+
 /**
  * Set the behavior of the label with longer text then the object size
  * @param label pointer to a label object