Refactor app.c and board.c for improved display handling and memory management

- Updated sgl_print_hello function to clear the screen and render "Hello World" with improved task handling.
- Modified business_task to repeatedly display "Hello World" every second.
- Enhanced lcd_rtc_test to create and manage labels more efficiently, ensuring proper screen updates.
- Introduced dynamic text handling in sgl_label to manage memory for label text, allowing for automatic cleanup on destruction.
- Added cmd_mem_info function to display SGL memory usage via shell command.

User/application/app.c

@@ -5,39 +5,52 @@
 #include "../system/sgl/sgl.h"
 
 static TaskHandle_t business_task_handle = NULL;
+extern Shell shell; /* defined in shell_port.c */
 
-void sgl_print_hello(void)
+static void sgl_print_hello(void)
 {
-    /* 设置页面背景为黑色，使白色文字可见 */
+    sgl_obj_delete(NULL);
-    sgl_page_set_color(sgl_screen_act(), sgl_rgb(0x00, 0x00, 0x00));
+    sgl_task_handle(); /* 刷新：屏幕清空 */
 
-    /* 全屏 label，居中显示 Hello World */
+    sgl_page_set_color(sgl_screen_act(), sgl_rgb(0x00, 0x00, 0x00));
     sgl_obj_t *label = sgl_label_create(NULL);
     sgl_obj_set_pos(label, 0, 0);
     sgl_obj_set_size(label, 240, 240);
-    sgl_label_set_text(label, "Hello World");
     sgl_label_set_font(label, &song23);
     sgl_label_set_text_color(label, sgl_rgb(0xFF, 0xFF, 0xFF));
     sgl_label_set_text_align(label, SGL_ALIGN_CENTER);
+    sgl_label_set_text(label, "Hello World");
+
+    sgl_task_handle(); /* 渲染：Hello World 出现在屏幕 */
 }
 
 void business_task(void *pvParameters)
 {
-    /* 启动时显示 Hello World 2 秒 */
-    sgl_print_hello();
-    sgl_task_handle();
-    vTaskDelay(2000);
 
     for (;;)
     {
         rtc_update();
+
+        sgl_print_hello();
+        vTaskDelay(1000); /* 显示 1 秒 */
+
         lcd_rtc_test();
-        sgl_task_handle();
         led_toggle(LED_USER);
         vTaskDelay(1000);
     }
 }
 
+static void cmd_mem_info(void)
+{
+    sgl_mm_monitor_t m = sgl_mm_get_monitor();
+    shellPrint(&shell, "SGL mem: total=%u used=%u free=%u rate=%u.%02u%%\r\n",
+               m.total_size, m.used_size, m.free_size,
+               (m.used_rate >> 8) & 0xFF,
+               m.used_rate & 0xFF);
+}
+SHELL_EXPORT_CMD(SHELL_CMD_PERMISSION(0) | SHELL_CMD_TYPE(SHELL_TYPE_CMD_FUNC),
+                 meminfo, cmd_mem_info, "show sgl memory usage");
+
 void app_init(void)
 {
     userShellInit(); // 初始化shell

User/board/board.c

@@ -149,12 +149,10 @@ BOOL rtc_init(void)
 
 void lcd_rtc_test(void)
 {
-    static sgl_obj_t *label_time = NULL;
+    char tmp[32];
-    static char buf[32];
-
-    if (label_time == NULL)
-    {
     sgl_obj_delete(NULL);
+    sgl_task_handle(); /* 刷新：屏幕清空 */
+
     sgl_page_set_color(sgl_screen_act(), sgl_rgb(0x00, 0x00, 0x00));
 
     sgl_obj_t *lbl = sgl_label_create(NULL);
@@ -173,18 +171,20 @@ void lcd_rtc_test(void)
     sgl_label_set_text_color(lbl, sgl_rgb(0xFF, 0xFF, 0x00));
     sgl_label_set_text_align(lbl, SGL_ALIGN_CENTER);
 
-        label_time = sgl_label_create(NULL);
+    lbl = sgl_label_create(NULL);
-        sgl_obj_set_pos(label_time, 0, 130);
+    sgl_obj_set_pos(lbl, 0, 130);
-        sgl_obj_set_size(label_time, 240, 28);
+    sgl_obj_set_size(lbl, 240, 28);
-        sgl_label_set_font(label_time, &song23);
+    /* 使用 sgl_label_set_text_dyn：文本复制到 label 自有堆内存，label 销毁时自动释放 */
-        sgl_label_set_text_color(label_time, sgl_rgb(0xFF, 0x40, 0x40));
+    sprintf(tmp, "%d-%02d-%02d %02d:%02d:%02d",
-        sgl_label_set_text_align(label_time, SGL_ALIGN_CENTER);
-    }
-
-    sprintf(buf, "%d-%02d-%02d %02d:%02d:%02d",
             2000 + board.rtc_date.year, board.rtc_date.month, board.rtc_date.day,
             board.rtc_time.hour, board.rtc_time.minute, board.rtc_time.second);
-    sgl_label_set_text(label_time, buf);
+    // sgl_label_set_text_dyn(lbl, tmp);
+    sgl_label_set_text(lbl, tmp);
+    sgl_label_set_font(lbl, &song23);
+    sgl_label_set_text_color(lbl, sgl_rgb(0xFF, 0x40, 0x40));
+    sgl_label_set_text_align(lbl, SGL_ALIGN_CENTER);
+
+    sgl_task_handle();
 }
 
 // ÇåÆÁ²âÊÔ

User/system/sgl/widgets/label/sgl_label.c

@@ -32,7 +32,6 @@
 #include <string.h>
 #include "sgl_label.h"
 
-
 /**
  * @brief construct the label object
  * @param surf pointer to the surface
@@ -46,34 +45,49 @@ static void sgl_label_construct_cb(sgl_surf_t *surf, sgl_obj_t* obj, sgl_event_t
     sgl_pos_t align_pos;
 
     SGL_ASSERT(label->font != NULL);
-
+    if (evt->type == SGL_EVENT_DESTROYED)
-    if (evt->type == SGL_EVENT_DRAW_MAIN) {
+    {
-        if (label->bg_flag) {
+        /* 释放动态文本缓冲 */
+        if (label->text_buf != NULL)
+        {
+            sgl_free(label->text_buf);
+            label->text_buf = NULL;
+        }
+        return;
+    }
+    if (evt->type == SGL_EVENT_DRAW_MAIN)
+    {
+        if (label->bg_flag)
+        {
             sgl_draw_fill_rect(surf, &obj->area, &obj->coords, obj->radius, label->bg_color, label->alpha);
         }
 
         align_pos = sgl_get_text_pos(&obj->coords, label->font, label->text, 0, (sgl_align_type_t)label->align);
 
 #if (CONFIG_SGL_LABEL_ROTATION)
-        if (label->rota == 0) {
+        if (label->rota == 0)
+        {
 #endif
             sgl_draw_string(surf, &obj->area, align_pos.x + label->transform.offset.offset_x,
                             align_pos.y + label->transform.offset.offset_y,
                             label->text, label->color, label->alpha, label->font);
 #if (CONFIG_SGL_LABEL_ROTATION)
         }
-        else {
+        else
+        {
             const int16_t width = obj->area.x2 - obj->area.x1 + 1;
             const int16_t height = obj->area.y2 - obj->area.y1 + 1;
             const uint32_t buf_size = width * height;
 
             sgl_color_t *temp_buf = sgl_malloc(buf_size * sizeof(sgl_color_t));
-            if (temp_buf == NULL) {
+            if (temp_buf == NULL)
+            {
                 SGL_LOG_ERROR("sgl_label_construct_cb: malloc rotation temp buffer failed");
                 return;
             }
 
-            for (uint32_t i = 0; i < buf_size; i++) {
+            for (uint32_t i = 0; i < buf_size; i++)
+            {
                 temp_buf[i] = label->bg_color;
             }
 
@@ -85,8 +99,7 @@ static void sgl_label_construct_cb(sgl_surf_t *surf, sgl_obj_t* obj, sgl_event_t
                 .buffer = temp_buf,
                 .w = width,
                 .h = height,
-                .dirty = NULL
+                .dirty = NULL};
-            };
 
             sgl_draw_string(&temp_surf, &obj->area, align_pos.x, align_pos.y,
                             label->text, label->color, label->alpha, label->font);
@@ -98,7 +111,6 @@ static void sgl_label_construct_cb(sgl_surf_t *surf, sgl_obj_t* obj, sgl_event_t
     }
 }
 
-
 /**
  * @brief create a label object
  * @param parent parent of the label
@@ -107,7 +119,8 @@ static void sgl_label_construct_cb(sgl_surf_t *surf, sgl_obj_t* obj, sgl_event_t
 sgl_obj_t *sgl_label_create(sgl_obj_t *parent)
 {
     sgl_label_t *label = sgl_malloc(sizeof(sgl_label_t));
-    if(label == NULL) {
+    if (label == NULL)
+    {
         SGL_LOG_ERROR("sgl_label_create: malloc failed");
         return NULL;
     }
@@ -121,6 +134,7 @@ sgl_obj_t* sgl_label_create(sgl_obj_t* parent)
 
     label->alpha = SGL_ALPHA_MAX;
     label->bg_flag = 0;
+    label->text_buf = NULL;
     label->color = SGL_THEME_TEXT_COLOR;
     label->text = "";
     label->transform.rotation = 0;

User/system/sgl/widgets/label/sgl_label.h

@@ -33,15 +33,16 @@
 #include <sgl_cfgfix.h>
 #include <string.h>
 
-
 /**
  * @brief sgl label object
  * @obj: sgl general object
  * @desc: draw task descriptor
  */
-typedef struct sgl_label {
+typedef struct sgl_label
+{
     sgl_obj_t obj;
     const char *text;
+    char *text_buf; /* 动态文本缓冲，由 label 持有，销毁时自动释放 */
     const sgl_font_t *font;
     sgl_color_t color;
     sgl_color_t bg_color;
@@ -49,8 +50,10 @@ typedef struct sgl_label {
     uint8_t align : 6;
     uint8_t bg_flag : 1;
     uint8_t rota : 1;
-    union {
+    union
-        struct {
+    {
+        struct
+        {
             int8_t offset_x;
             int8_t offset_y;
         } offset;
@@ -58,7 +61,6 @@ typedef struct sgl_label {
     } transform;
 } sgl_label_t;
 
-
 /**
  * @brief create a label object
  * @param parent parent of the label
@@ -66,7 +68,6 @@ typedef struct sgl_label {
  */
 sgl_obj_t *sgl_label_create(sgl_obj_t *parent);
 
-
 /**
  * @brief set label text
  * @param obj pointer to the label object
@@ -80,6 +81,27 @@ static inline void sgl_label_set_text(sgl_obj_t *obj, const char *text)
     sgl_obj_set_dirty(obj);
 }
 
+/**
+ * @brief 设置动态文本：将 text 复制到 label 自有堆内存，label 销毁时自动释放
+ * @note  使用前请先 sprintf 到临时 buf，再调用此函数传入 buf
+ */
+static inline void sgl_label_set_text_dyn(sgl_obj_t *obj, const char *text)
+{
+    sgl_label_t *label = sgl_container_of(obj, sgl_label_t, obj);
+    size_t len = strlen(text) + 1;
+    if (label->text_buf != NULL)
+    {
+        sgl_free(label->text_buf);
+    }
+    label->text_buf = (char *)sgl_malloc(len);
+    if (label->text_buf != NULL)
+    {
+        memcpy(label->text_buf, text, len);
+        label->text = label->text_buf;
+    }
+    sgl_obj_set_dirty(obj);
+}
+
 /**
  * @brief set label font
  * @param obj pointer to the label object
@@ -183,7 +205,8 @@ static inline void sgl_label_set_text_rotation(sgl_obj_t *obj, int16_t text_rota
 {
     sgl_label_t *label = sgl_container_of(obj, sgl_label_t, obj);
     label->transform.rotation = text_rotation % 360;
-    if (label->transform.rotation < 0) label->transform.rotation += 360;
+    if (label->transform.rotation < 0)
+        label->transform.rotation += 360;
     label->rota = label->transform.rotation ? 1 : 0;
     sgl_obj_set_dirty(obj);
 }