feat(qrcode): add new set_data helper function (#8950)

src/libs/qrcode/lv_qrcode.c

@@ -204,6 +204,12 @@ lv_result_t lv_qrcode_update(lv_obj_t * obj, const void * data, uint32_t data_le
     return LV_RESULT_OK;
 }
 
+void lv_qrcode_set_data(lv_obj_t * obj, const char * data)
+{
+    if(data == NULL) return;
+    lv_qrcode_update(obj, data, lv_strlen(data));
+}
+
 void lv_qrcode_set_quiet_zone(lv_obj_t * obj, bool enable)
 {
     lv_qrcode_t * qrcode = (lv_qrcode_t *)obj;

src/libs/qrcode/lv_qrcode.h

@@ -72,6 +72,13 @@ void lv_qrcode_set_light_color(lv_obj_t * obj, lv_color_t color);
  */
 lv_result_t lv_qrcode_update(lv_obj_t * obj, const void * data, uint32_t data_len);
 
+/**
+ * Helper function to set the data of a QR code object
+ * @param obj pointer to a QR code object
+ * @param data data to display as a string
+ */
+void lv_qrcode_set_data(lv_obj_t * obj, const char * data);
+
 /**
  * Enable or disable quiet zone.
  * Quiet zone is the area around the QR code where no data is encoded.

src/others/xml/parsers/lv_xml_qrcode_parser.c

@@ -49,9 +49,6 @@ void lv_xml_qrcode_apply(lv_xml_parser_state_t * state, const char ** attrs)
     void * item = lv_xml_state_get_item(state);
     lv_xml_obj_apply(state, attrs); /*Apply the common properties, e.g. width, height, styles flags etc*/
 
-    /* QR needs data after size/colors, so capture `data` while looping and apply at the end */
-    const char * data_txt = NULL;
-
     for(int i = 0; attrs[i]; i += 2) {
         const char * name  = attrs[i];
         const char * value = attrs[i + 1];
@@ -59,16 +56,9 @@ void lv_xml_qrcode_apply(lv_xml_parser_state_t * state, const char ** attrs)
         if(lv_streq("size", name)) lv_qrcode_set_size(item, lv_xml_atoi(value));
         else if(lv_streq("dark_color", name)) lv_qrcode_set_dark_color(item, lv_xml_to_color(value));
         else if(lv_streq("light_color", name)) lv_qrcode_set_light_color(item, lv_xml_to_color(value));
-        else if(lv_streq("data", name)) data_txt = value;
+        else if(lv_streq("data", name)) lv_qrcode_set_data(item, value);
         else if(lv_streq("quiet_zone", name)) lv_qrcode_set_quiet_zone(item, lv_xml_to_bool(value));
     }
-
-    if(data_txt) {
-        lv_result_t r = lv_qrcode_update(item, data_txt, (uint32_t)lv_strlen(data_txt));
-        if(r != LV_RESULT_OK) {
-            LV_LOG_WARN("lv_qrcode_update() failed");
-        }
-    }
 }
 
 /**********************

tests/src/test_cases/xml/test_xml_qrcode.c

@@ -33,8 +33,8 @@ void test_xml_qrcode_with_attrs(void)
         "size", "150",
         "dark_color", "0x000000",
         "light_color", "0xFFFFFF",
-        "data", "https://lvgl.io",
         "quiet_zone", "true",
+        "data", "https://lvgl.io",
         "style_border_width", "1",
         "style_border_color", "0x000000",
         NULL, NULL,

xmls/lv_qrcode.xml

@@ -8,7 +8,7 @@ Example
         <prop name="size" type="int" help="QR canvas edge length in px (use this instead of width/height)"/>
         <prop name="dark_color" type="color" help="Foreground color for QR modules"/>
         <prop name="light_color" type="color" help="Background color"/>
-        <prop name="data" type="string" help="UTF-8 payload encoded into the QR code"/>
+        <prop name="data" type="string" help="UTF-8 payload encoded into the QR code. Must be called as last property"/>
         <prop name="quiet_zone" type="bool" help="Add quiet zone (border) around the QR code"/>
     </api>
 </widget>