diff --git a/demos/assets.c b/demos/assets.c
index a76a92787..fb5fec326 100644
--- a/demos/assets.c
+++ b/demos/assets.c
@@ -410,7 +410,7 @@
 #include "assets/default/inc/images/arrow_left_n.data"
 #include "assets/default/inc/images/edit_clear_p.data"
 #include "assets/default/inc/images/battery_2.data"
-#endif /*WITH_STB_IMAGE*/
+#endif/*WITH_STB_IMAGE*/
 #ifdef WITH_VGCANVAS
 #include "assets/default/inc/images/pointer_4.bsvg"
 #include "assets/default/inc/images/htest.bsvg"
@@ -419,13 +419,13 @@
 #include "assets/default/inc/images/pointer_1.bsvg"
 #include "assets/default/inc/images/pointer.bsvg"
 #include "assets/default/inc/images/girl.bsvg"
-#endif /*WITH_VGCANVAS*/
+#endif/*WITH_VGCANVAS*/
 #if defined(WITH_TRUETYPE_FONT)
 #include "assets/default/inc/fonts/default.res"
-#else /*WITH_TRUETYPE_FONT*/
+#else/*WITH_TRUETYPE_FONT*/
 #include "assets/default/inc/fonts/default.data"
-#endif /*WITH_TRUETYPE_FONT*/
-#endif /*WITH_FS_RES*/
+#endif/*WITH_TRUETYPE_FONT*/
+#endif/*WITH_FS_RES*/
 
 ret_t assets_init(void) {
   assets_manager_t* am = assets_manager();
@@ -726,7 +726,7 @@ ret_t assets_init(void) {
   assets_manager_add(am, image_pointer_1);
   assets_manager_add(am, image_pointer);
   assets_manager_add(am, image_girl);
-#endif /*WITH_VGCANVAS*/
+#endif/*WITH_VGCANVAS*/
 #endif
 
   tk_init_assets();
diff --git a/demos/assets/default/inc/ui/image_value.data b/demos/assets/default/inc/ui/image_value.data
index 19227e079..2bd37d896 100644
--- a/demos/assets/default/inc/ui/image_value.data
+++ b/demos/assets/default/inc/ui/image_value.data
@@ -1,5 +1,5 @@
 TK_CONST_DATA_ALIGN(const unsigned char ui_image_value[]) = {
-0x04,0x00,0x01,0x01,0x52,0x04,0x00,0x00,0x00,0x00,0x00,0x00,0x69,0x6d,0x61,0x67,0x65,0x5f,0x76,0x61,
+0x04,0x00,0x01,0x01,0x42,0x04,0x00,0x00,0x00,0x00,0x00,0x00,0x69,0x6d,0x61,0x67,0x65,0x5f,0x76,0x61,
 0x6c,0x75,0x65,0x00,0x64,0x61,0x74,0x61,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
 0x00,0x00,0x00,0x00,0x12,0x12,0x22,0x11,0x77,0x69,0x6e,0x64,0x6f,0x77,0x00,0x00,0x00,0x00,0x00,0x00,
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@@ -14,46 +14,45 @@ TK_CONST_DATA_ALIGN(const unsigned char ui_image_value[]) = {
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+0x68,0x3d,0x33,0x30,0x29,0x00,0x66,0x6c,0x6f,0x61,0x74,0x69,0x6e,0x67,0x00,0x74,0x72,0x75,0x65,0x00,
+0x74,0x65,0x78,0x74,0x00,0x43,0x6c,0x6f,0x73,0x65,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,};/*1138*/
diff --git a/demos/assets/default/raw/ui/image_value.bin b/demos/assets/default/raw/ui/image_value.bin
index cec1cf2f6..de728fc6b 100644
Binary files a/demos/assets/default/raw/ui/image_value.bin and b/demos/assets/default/raw/ui/image_value.bin differ
diff --git a/demos/assets/default/raw/ui/image_value.xml b/demos/assets/default/raw/ui/image_value.xml
index 5f1e03a58..8b8f811f9 100644
--- a/demos/assets/default/raw/ui/image_value.xml
+++ b/demos/assets/default/raw/ui/image_value.xml
@@ -1,7 +1,6 @@
 <window anim_hint="htranslate">
   <view x="0" y="0" w="100%" h="100%" children_layout="default(c=2,r=3)">
-    <image_value  value="0" image="battery_"
-      animation="value(from=0, to=5, duration=10000)"/>
+    <image_value  value="0" image="battery_" click_add_delta="1" min="0" max="5"/>
     
     <image_value  value="0" image="battery_"
       animation="value(from=0, to=5, duration=10000)"/>
diff --git a/docs/changes.md b/docs/changes.md
index 2f681752b..fb4b967c6 100644
--- a/docs/changes.md
+++ b/docs/changes.md
@@ -6,6 +6,7 @@
   * 完善窗口管理器事件分发，窗口相关事件同时分发到控件。
   * 完善SVG （感谢钟伟提供补丁）。
   * 完善OpenGL shader（感谢智明提供补丁）。
+  * 完善image value，支持点击时加上一个增量，增加到最大值后回到最小值。
 
 * 2020/03/02
   * 完善 README 中 Ubuntu 依赖软件包（感谢陈谭提供补丁）。
diff --git a/src/ext_widgets/image_value/image_value.c b/src/ext_widgets/image_value/image_value.c
index 91e04e90a..64e639095 100644
--- a/src/ext_widgets/image_value/image_value.c
+++ b/src/ext_widgets/image_value/image_value.c
@@ -107,12 +107,21 @@ static ret_t image_value_get_prop(widget_t* widget, const char* name, value_t* v
   if (tk_str_eq(name, WIDGET_PROP_VALUE)) {
     value_set_float(v, image_value->value);
     return RET_OK;
+  } else if (tk_str_eq(name, WIDGET_PROP_MIN)) {
+    value_set_float(v, image_value->min);
+    return RET_OK;
+  } else if (tk_str_eq(name, WIDGET_PROP_MAX)) {
+    value_set_float(v, image_value->max);
+    return RET_OK;
   } else if (tk_str_eq(name, WIDGET_PROP_IMAGE)) {
     value_set_str(v, image_value->image);
     return RET_OK;
   } else if (tk_str_eq(name, WIDGET_PROP_FORMAT)) {
     value_set_str(v, image_value->format);
     return RET_OK;
+  } else if (tk_str_eq(name, WIDGET_PROP_CLICK_ADD_DELTA)) {
+    value_set_float(v, image_value->click_add_delta);
+    return RET_OK;
   }
 
   return RET_NOT_FOUND;
@@ -123,10 +132,16 @@ static ret_t image_value_set_prop(widget_t* widget, const char* name, const valu
 
   if (tk_str_eq(name, WIDGET_PROP_VALUE)) {
     return image_value_set_value(widget, value_float(v));
+  } else if (tk_str_eq(name, WIDGET_PROP_MIN)) {
+    return image_value_set_min(widget, value_float(v));
+  } else if (tk_str_eq(name, WIDGET_PROP_MAX)) {
+    return image_value_set_max(widget, value_float(v));
   } else if (tk_str_eq(name, WIDGET_PROP_IMAGE)) {
     return image_value_set_image(widget, value_str(v));
   } else if (tk_str_eq(name, WIDGET_PROP_FORMAT)) {
     return image_value_set_format(widget, value_str(v));
+  } else if (tk_str_eq(name, WIDGET_PROP_CLICK_ADD_DELTA)) {
+    return image_value_set_click_add_delta(widget, value_float(v));
   }
 
   return RET_NOT_FOUND;
@@ -142,11 +157,79 @@ static ret_t image_value_on_destroy(widget_t* widget) {
   return RET_OK;
 }
 
+ret_t image_value_add_delta(widget_t* widget) {
+  image_value_t* image_value = IMAGE_VALUE(widget);
+  return_value_if_fail(image_value != NULL, RET_BAD_PARAMS);
+
+  if (image_value->click_add_delta) {
+    float_t min = tk_min(image_value->min, image_value->max);
+    float_t max = tk_max(image_value->min, image_value->max);
+    return_value_if_fail(min < max, RET_BAD_PARAMS);
+
+    widget_dispatch_simple_event(widget, EVT_VALUE_WILL_CHANGE);
+    image_value->value += image_value->click_add_delta;
+
+    if (image_value->value > max) {
+      image_value->value = min;
+    } else if (image_value->value < min) {
+      image_value->value = max;
+    }
+
+    widget_dispatch_simple_event(widget, EVT_VALUE_CHANGED);
+    widget_invalidate(widget, NULL);
+  }
+
+  return RET_OK;
+}
+
+static ret_t image_value_on_event(widget_t* widget, event_t* e) {
+  uint16_t type = e->type;
+  image_value_t* image_value = IMAGE_VALUE(widget);
+  return_value_if_fail(image_value != NULL && widget != NULL, RET_BAD_PARAMS);
+
+  switch (type) {
+    case EVT_POINTER_DOWN: {
+      image_value->pressed = TRUE;
+      widget_grab(widget->parent, widget);
+      break;
+    }
+    case EVT_POINTER_DOWN_ABORT: {
+      image_value->pressed = FALSE;
+      widget_ungrab(widget->parent, widget);
+      break;
+    }
+    case EVT_POINTER_UP: {
+      if (image_value->pressed) {
+        image_value_add_delta(widget);
+      }
+      image_value->pressed = FALSE;
+      widget_ungrab(widget->parent, widget);
+      break;
+    }
+    default:
+      break;
+  }
+
+  return RET_OK;
+}
+
+static const char* s_image_value_properties[] = {WIDGET_PROP_VALUE,
+                                                 WIDGET_PROP_MIN,
+                                                 WIDGET_PROP_MAX,
+                                                 WIDGET_PROP_FORMAT,
+                                                 WIDGET_PROP_IMAGE,
+                                                 WIDGET_PROP_CLICK_ADD_DELTA,
+                                                 NULL};
+
 TK_DECL_VTABLE(image_value) = {.size = sizeof(image_value_t),
                                .type = WIDGET_TYPE_IMAGE_VALUE,
                                .parent = TK_PARENT_VTABLE(widget),
+                               .inputable = TRUE,
+                               .clone_properties = s_image_value_properties,
+                               .persistent_properties = s_image_value_properties,
                                .create = image_value_create,
                                .on_destroy = image_value_on_destroy,
+                               .on_event = image_value_on_event,
                                .get_prop = image_value_get_prop,
                                .set_prop = image_value_set_prop,
                                .on_paint_self = image_value_on_paint_self};
@@ -194,6 +277,33 @@ ret_t image_value_set_value(widget_t* widget, float_t value) {
   return RET_OK;
 }
 
+ret_t image_value_set_click_add_delta(widget_t* widget, float_t click_add_delta) {
+  image_value_t* image_value = IMAGE_VALUE(widget);
+  return_value_if_fail(image_value != NULL, RET_BAD_PARAMS);
+
+  image_value->click_add_delta = click_add_delta;
+
+  return RET_OK;
+}
+
+ret_t image_value_set_min(widget_t* widget, float_t min) {
+  image_value_t* image_value = IMAGE_VALUE(widget);
+  return_value_if_fail(image_value != NULL, RET_BAD_PARAMS);
+
+  image_value->min = min;
+
+  return RET_OK;
+}
+
+ret_t image_value_set_max(widget_t* widget, float_t max) {
+  image_value_t* image_value = IMAGE_VALUE(widget);
+  return_value_if_fail(image_value != NULL, RET_BAD_PARAMS);
+
+  image_value->max = max;
+
+  return RET_OK;
+}
+
 widget_t* image_value_cast(widget_t* widget) {
   return_value_if_fail(WIDGET_IS_INSTANCE_OF(widget, image_value), NULL);
 
diff --git a/src/ext_widgets/image_value/image_value.h b/src/ext_widgets/image_value/image_value.h
index b5e7bdf71..aa543076e 100644
--- a/src/ext_widgets/image_value/image_value.h
+++ b/src/ext_widgets/image_value/image_value.h
@@ -40,6 +40,9 @@ BEGIN_C_DECLS
  *  * 2.把每个字符与image(图片文件名前缀)映射成一个图片名。
  *  * 3.最后把这些图片显示出来。
  *
+ * 如果设置click\_add\_delta为非0，那么点击时自动增加指定的增量，值超过最大值时回到最小值, 
+ * 或者值超过最小值时回到最大值。
+ *
  *image\_value\_t是[widget\_t](widget_t.md)的子类控件，widget\_t的函数均适用于image\_value\_t控件。
  *
  *在xml中使用"image\_value"标签创建图片值控件。如：
@@ -82,14 +85,48 @@ typedef struct _image_value_t {
    */
   char* format;
 
+  /**
+   * @property {float_t} click_add_delta
+   * @annotation ["set_prop","get_prop","readable","persitent","design","scriptable"]
+   * 点击时加上一个增量。
+   */
+  float_t click_add_delta;
+
   /**
    * @property {float_t} value
    * @annotation ["set_prop","get_prop","readable","persitent","design","scriptable"]
    * 值。
    */
   float_t value;
+
+  /**
+   * @property {float_t} min
+   * @annotation ["set_prop","get_prop","readable","persitent","design","scriptable"]
+   * 最小值(如果设置了click\_add\_delta，到达最小值后回到最大值)。
+   */
+  float_t min;
+
+  /**
+   * @property {float_t} max
+   * @annotation ["set_prop","get_prop","readable","persitent","design","scriptable"]
+   * 最大值(如果设置了click\_add\_delta，到达最大值后回到最小值)。
+   */
+  float_t max;
+
+  /*private*/
+  bool_t pressed;
 } image_value_t;
 
+/**
+ * @event {event_t} EVT_VALUE_WILL_CHANGE
+ * 值即将改变事件(click_add_delta为非0时，点击触发)。
+ */
+
+/**
+ * @event {event_t} EVT_VALUE_CHANGED
+ * 值改变事件(click_add_delta为非0时，点击触发)。
+ */
+
 /**
  * @method image_value_create
  * 创建image_value对象
@@ -126,6 +163,17 @@ ret_t image_value_set_image(widget_t* widget, const char* image);
  */
 ret_t image_value_set_format(widget_t* widget, const char* format);
 
+/**
+ * @method image_value_set_click_add_delta
+ * 设置点击时加上的增量。
+ * @annotation ["scriptable"]
+ * @param {widget_t*} widget image_value对象。
+ * @param {float_t} delta 增量。
+ *
+ * @return {ret_t} 返回RET_OK表示成功，否则表示失败。
+ */
+ret_t image_value_set_click_add_delta(widget_t* widget, float_t click_add_delta);
+
 /**
  * @method image_value_set_value
  * 设置值。
@@ -137,6 +185,28 @@ ret_t image_value_set_format(widget_t* widget, const char* format);
  */
 ret_t image_value_set_value(widget_t* widget, float_t value);
 
+/**
+ * @method image_value_set_min
+ * 设置最小值。
+ * @annotation ["scriptable"]
+ * @param {widget_t*} widget image_min对象。
+ * @param {float_t} min 最小值。
+ *
+ * @return {ret_t} 返回RET_OK表示成功，否则表示失败。
+ */
+ret_t image_value_set_min(widget_t* widget, float_t min);
+
+/**
+ * @method image_value_set_max
+ * 设置最大值。
+ * @annotation ["scriptable"]
+ * @param {widget_t*} widget image_max对象。
+ * @param {float_t} max 最大值。
+ *
+ * @return {ret_t} 返回RET_OK表示成功，否则表示失败。
+ */
+ret_t image_value_set_max(widget_t* widget, float_t max);
+
 /**
  * @method image_value_cast
  * 转换为image_value对象(供脚本语言使用)。
@@ -154,6 +224,8 @@ widget_t* image_value_cast(widget_t* widget);
 /* "/"不是有效的文件名，所以把字符"/"映射成"slash" */
 #define IMAGE_VALUE_MAP_SLASH "slash"
 
+#define WIDGET_PROP_CLICK_ADD_DELTA "click_add_delta"
+
 #ifndef IMAGE_VALUE_MAX_CHAR_NR
 #define IMAGE_VALUE_MAX_CHAR_NR 8
 #endif /*IMAGE_VALUE_MAX_CHAR_NR*/
@@ -163,6 +235,9 @@ widget_t* image_value_cast(widget_t* widget);
 /*public for subclass and runtime type check*/
 TK_EXTERN_VTABLE(image_value);
 
+/*public for test*/
+ret_t image_value_add_delta(widget_t* widget);
+
 END_C_DECLS
 
 #endif /*TK_IMAGE_VALUE_H*/
diff --git a/tests/image_value_test.cc b/tests/image_value_test.cc
index 9929f5f34..c75b88c7f 100644
--- a/tests/image_value_test.cc
+++ b/tests/image_value_test.cc
@@ -35,3 +35,72 @@ TEST(ImageValue, cast) {
 
   widget_destroy(w);
 }
+
+TEST(ImageValue, min_max) {
+  widget_t* w = image_value_create(NULL, 10, 20, 30, 40);
+
+  ASSERT_EQ(widget_set_prop_int(w, WIDGET_PROP_MIN, 1), RET_OK);
+  ASSERT_EQ(widget_get_prop_int(w, WIDGET_PROP_MIN, 0), 1);
+
+  ASSERT_EQ(widget_set_prop_int(w, WIDGET_PROP_MAX, 5), RET_OK);
+  ASSERT_EQ(widget_get_prop_int(w, WIDGET_PROP_MAX, 0), 5);
+
+  ASSERT_EQ(widget_set_prop_int(w, WIDGET_PROP_VALUE, 3), RET_OK);
+  ASSERT_EQ(widget_get_prop_int(w, WIDGET_PROP_VALUE, 0), 3);
+
+  widget_destroy(w);
+}
+
+TEST(ImageValue, add_delta_p) {
+  widget_t* w = image_value_create(NULL, 10, 20, 30, 40);
+
+  ASSERT_EQ(widget_set_prop_int(w, WIDGET_PROP_MIN, 1), RET_OK);
+  ASSERT_EQ(widget_get_prop_int(w, WIDGET_PROP_MIN, 0), 1);
+
+  ASSERT_EQ(widget_set_prop_int(w, WIDGET_PROP_MAX, 5), RET_OK);
+  ASSERT_EQ(widget_get_prop_int(w, WIDGET_PROP_MAX, 0), 5);
+
+  ASSERT_EQ(widget_set_prop_int(w, WIDGET_PROP_VALUE, 3), RET_OK);
+  ASSERT_EQ(widget_get_prop_int(w, WIDGET_PROP_VALUE, 0), 3);
+
+  ASSERT_EQ(widget_set_prop_int(w, WIDGET_PROP_CLICK_ADD_DELTA, 1), RET_OK);
+  ASSERT_EQ(widget_get_prop_int(w, WIDGET_PROP_CLICK_ADD_DELTA, 0), 1);
+
+  ASSERT_EQ(image_value_add_delta(w), RET_OK);
+  ASSERT_EQ(widget_get_prop_int(w, WIDGET_PROP_VALUE, 0), 4);
+
+  ASSERT_EQ(image_value_add_delta(w), RET_OK);
+  ASSERT_EQ(widget_get_prop_int(w, WIDGET_PROP_VALUE, 0), 5);
+
+  ASSERT_EQ(image_value_add_delta(w), RET_OK);
+  ASSERT_EQ(widget_get_prop_int(w, WIDGET_PROP_VALUE, 0), 1);
+
+  widget_destroy(w);
+}
+
+TEST(ImageValue, add_delta_n) {
+  widget_t* w = image_value_create(NULL, 10, 20, 30, 40);
+
+  ASSERT_EQ(widget_set_prop_int(w, WIDGET_PROP_MIN, 1), RET_OK);
+  ASSERT_EQ(widget_get_prop_int(w, WIDGET_PROP_MIN, 0), 1);
+
+  ASSERT_EQ(widget_set_prop_int(w, WIDGET_PROP_MAX, 5), RET_OK);
+  ASSERT_EQ(widget_get_prop_int(w, WIDGET_PROP_MAX, 0), 5);
+
+  ASSERT_EQ(widget_set_prop_int(w, WIDGET_PROP_VALUE, 3), RET_OK);
+  ASSERT_EQ(widget_get_prop_int(w, WIDGET_PROP_VALUE, 0), 3);
+
+  ASSERT_EQ(widget_set_prop_int(w, WIDGET_PROP_CLICK_ADD_DELTA, -1), RET_OK);
+  ASSERT_EQ(widget_get_prop_int(w, WIDGET_PROP_CLICK_ADD_DELTA, 0), -1);
+
+  ASSERT_EQ(image_value_add_delta(w), RET_OK);
+  ASSERT_EQ(widget_get_prop_int(w, WIDGET_PROP_VALUE, 0), 2);
+
+  ASSERT_EQ(image_value_add_delta(w), RET_OK);
+  ASSERT_EQ(widget_get_prop_int(w, WIDGET_PROP_VALUE, 0), 1);
+
+  ASSERT_EQ(image_value_add_delta(w), RET_OK);
+  ASSERT_EQ(widget_get_prop_int(w, WIDGET_PROP_VALUE, 0), 5);
+
+  widget_destroy(w);
+}