From 686c6c9033d70641afba0e1039156ec41ef1b1a8 Mon Sep 17 00:00:00 2001
From: fallstool <fallstod@gmail.com>
Date: Tue, 30 Oct 2018 16:38:00 +0800
Subject: [PATCH 1/6] Update lv_list.h

---
 lv_objx/lv_list.h | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/lv_objx/lv_list.h b/lv_objx/lv_list.h
index 44ecf1f95..53e9b1aed 100644
--- a/lv_objx/lv_list.h
+++ b/lv_objx/lv_list.h
@@ -56,6 +56,7 @@ typedef struct
     uint16_t anim_time;                          /*Scroll animation time*/
     lv_style_t *styles_btn[LV_BTN_STATE_NUM];    /*Styles of the list element buttons*/
     lv_style_t *style_img;                       /*Style of the list element images on buttons*/
+    uint32_t size; /*the number of items(buttons) in the list*/
 #if USE_LV_GROUP
     lv_obj_t * selected_btn;
 #endif
@@ -106,6 +107,14 @@ void lv_list_clean(lv_obj_t *obj);
  */
 lv_obj_t * lv_list_add(lv_obj_t * list, const void * img_src, const char * txt, lv_action_t rel_action);
 
+/**
+ * Remove the index of the button in the list
+ * @param list pointer to a list object
+ * @param index pointer to a the button's index in the list, index must be 0 <= index < lv_list_ext_t.size
+ * @return true: successfully deleted
+ */
+bool lv_list_remove(const lv_obj_t * list, uint32_t index);
+
 /*=====================
  * Setter functions
  *====================*/
@@ -184,6 +193,21 @@ lv_obj_t * lv_list_get_prev_btn(const lv_obj_t * list, lv_obj_t * prev_btn);
  */
 lv_obj_t * lv_list_get_next_btn(const lv_obj_t * list, lv_obj_t * prev_btn);
 
+/**
+ * Get the index of the button in the list
+ * @param list pointer to a list object
+ * @param btn pointer to a list element (button)
+ * @return the index of the button in the list, or -1 of the button not in this list
+ */
+int lv_list_get_btn_index(const lv_obj_t * list, const lv_obj_t * btn);
+
+/**
+ * Get the number of buttons in the list
+ * @param list pointer to a list object
+ * @return the number of buttons in the list
+ */
+uint32_t lv_list_get_size(const lv_obj_t * list);
+
 #if USE_LV_GROUP
 /**
  * Get the currently selected button

From 5b05afe948309d53e2e70cfefbc0d0fe4ea3fcc6 Mon Sep 17 00:00:00 2001
From: fallstool <fallstod@gmail.com>
Date: Tue, 30 Oct 2018 16:38:39 +0800
Subject: [PATCH 2/6] Update lv_list.c

---
 lv_objx/lv_list.c | 59 ++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 58 insertions(+), 1 deletion(-)

diff --git a/lv_objx/lv_list.c b/lv_objx/lv_list.c
index c0c994b65..b3d779210 100644
--- a/lv_objx/lv_list.c
+++ b/lv_objx/lv_list.c
@@ -174,7 +174,7 @@ lv_obj_t * lv_list_add(lv_obj_t * list, const void * img_src, const char * txt,
 {
     lv_style_t * style = lv_obj_get_style(list);
     lv_list_ext_t * ext = lv_obj_get_ext_attr(list);
-
+    ext->size ++;
     /*Create a list element with the image an the text*/
     lv_obj_t * liste;
     liste = lv_btn_create(list, NULL);
@@ -225,6 +225,31 @@ lv_obj_t * lv_list_add(lv_obj_t * list, const void * img_src, const char * txt,
     return liste;
 }
 
+/**
+ * Remove the index of the button in the list
+ * @param list pointer to a list object
+ * @param index pointer to a the button's index in the list, index must be 0 <= index < lv_list_ext_t.size
+ * @return true: successfully deleted
+ */
+bool lv_list_remove(const lv_obj_t * list, uint32_t index)
+{
+	lv_list_ext_t * ext = lv_obj_get_ext_attr(list);
+	if(index < 0 && index >= ext->size) return false;
+	int count = 0;
+	lv_obj_t * e = lv_list_get_next_btn(list, NULL);
+	while(e != NULL) {
+		if(count == index)
+		{
+			lv_obj_del(e);
+			ext->size --;
+			return true;
+		}
+        e = lv_list_get_next_btn(list, e);
+		count ++;
+	}
+	return false;
+}
+
 /*=====================
  * Setter functions
  *====================*/
@@ -441,6 +466,38 @@ lv_obj_t * lv_list_get_next_btn(const lv_obj_t * list, lv_obj_t * prev_btn)
     return btn;
 }
 
+/**
+ * Get the index of the button in the list
+ * @param list pointer to a list object
+ * @param btn pointer to a list element (button)
+ * @return the index of the button in the list, or -1 of the button not in this list
+ */
+int lv_list_get_btn_index(const lv_obj_t * list, const lv_obj_t * btn)
+{
+	int index = 0;
+	lv_obj_t * e = lv_list_get_next_btn(list, NULL);
+	while(e != NULL) {
+		if(e == btn)
+		{
+			return index;
+		}
+		index ++;
+        e = lv_list_get_next_btn(list, e);
+	}
+	return -1;
+}
+
+/**
+ * Get the number of buttons in the list
+ * @param list pointer to a list object
+ * @return the number of buttons in the list
+ */
+uint32_t lv_list_get_size(const lv_obj_t * list)
+{
+    lv_list_ext_t * ext = lv_obj_get_ext_attr(list);
+    return ext->size;
+}
+
 #if USE_LV_GROUP
 /**
  * Get the currently selected button

From 34f8013465350e864671b626134ec24a49ce1dff Mon Sep 17 00:00:00 2001
From: fallstool <fallstod@gmail.com>
Date: Tue, 30 Oct 2018 17:04:11 +0800
Subject: [PATCH 3/6] Update lv_list.h

---
 lv_objx/lv_list.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lv_objx/lv_list.h b/lv_objx/lv_list.h
index 53e9b1aed..fec507003 100644
--- a/lv_objx/lv_list.h
+++ b/lv_objx/lv_list.h
@@ -199,7 +199,7 @@ lv_obj_t * lv_list_get_next_btn(const lv_obj_t * list, lv_obj_t * prev_btn);
  * @param btn pointer to a list element (button)
  * @return the index of the button in the list, or -1 of the button not in this list
  */
-int lv_list_get_btn_index(const lv_obj_t * list, const lv_obj_t * btn);
+int32_t lv_list_get_btn_index(const lv_obj_t * list, const lv_obj_t * btn);
 
 /**
  * Get the number of buttons in the list

From 17bc493612eebd1f27027e3c20a53f031d912e15 Mon Sep 17 00:00:00 2001
From: fallstool <fallstod@gmail.com>
Date: Tue, 30 Oct 2018 17:05:27 +0800
Subject: [PATCH 4/6] Update lv_list.c

---
 lv_objx/lv_list.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lv_objx/lv_list.c b/lv_objx/lv_list.c
index b3d779210..891a9d31a 100644
--- a/lv_objx/lv_list.c
+++ b/lv_objx/lv_list.c
@@ -472,7 +472,7 @@ lv_obj_t * lv_list_get_next_btn(const lv_obj_t * list, lv_obj_t * prev_btn)
  * @param btn pointer to a list element (button)
  * @return the index of the button in the list, or -1 of the button not in this list
  */
-int lv_list_get_btn_index(const lv_obj_t * list, const lv_obj_t * btn)
+int32_t lv_list_get_btn_index(const lv_obj_t * list, const lv_obj_t * btn)
 {
 	int index = 0;
 	lv_obj_t * e = lv_list_get_next_btn(list, NULL);

From 6ecd3f1f8a8c68a9edb687188b89aaace26c7b20 Mon Sep 17 00:00:00 2001
From: fallstool <fallstod@gmail.com>
Date: Tue, 30 Oct 2018 18:08:38 +0800
Subject: [PATCH 5/6] Update lv_list.c

---
 lv_objx/lv_list.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lv_objx/lv_list.c b/lv_objx/lv_list.c
index 891a9d31a..971d41ab5 100644
--- a/lv_objx/lv_list.c
+++ b/lv_objx/lv_list.c
@@ -156,6 +156,8 @@ void lv_list_clean(lv_obj_t * obj)
 {
     lv_obj_t * scrl = lv_page_get_scrl(obj);
     lv_obj_clean(scrl);
+    lv_list_ext_t * ext = lv_obj_get_ext_attr(obj);
+    ext->size = 0;
 }
 
 /*======================

From 46b41862162b13201ff72f590d85438858ea6c12 Mon Sep 17 00:00:00 2001
From: fallstool <fallstod@gmail.com>
Date: Thu, 1 Nov 2018 09:58:55 +0800
Subject: [PATCH 6/6] Update lv_list.c

change the code style
---
 lv_objx/lv_list.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/lv_objx/lv_list.c b/lv_objx/lv_list.c
index 971d41ab5..4ccb5ab20 100644
--- a/lv_objx/lv_list.c
+++ b/lv_objx/lv_list.c
@@ -240,8 +240,7 @@ bool lv_list_remove(const lv_obj_t * list, uint32_t index)
 	int count = 0;
 	lv_obj_t * e = lv_list_get_next_btn(list, NULL);
 	while(e != NULL) {
-		if(count == index)
-		{
+		if(count == index) {
 			lv_obj_del(e);
 			ext->size --;
 			return true;
@@ -479,8 +478,7 @@ int32_t lv_list_get_btn_index(const lv_obj_t * list, const lv_obj_t * btn)
 	int index = 0;
 	lv_obj_t * e = lv_list_get_next_btn(list, NULL);
 	while(e != NULL) {
-		if(e == btn)
-		{
+		if(e == btn) {
 			return index;
 		}
 		index ++;