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perf(scroll): simplify lv_obj_get_scroll_right with RTL base direction

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This commit is contained in:
Gabor Kiss-Vamosi
2020-11-03 11:48:27 +01:00
parent d98b933b05
commit 1fa0c5527f
2 changed files with 33 additions and 33 deletions
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22
src/lv_core/lv_obj_scroll.c
View File

@@ -176,7 +176,7 @@ lv_coord_t lv_obj_get_scroll_y(const lv_obj_t * obj)
* @param obj
* @return
*/
lv_coord_t lv_obj_get_scroll_top(const lv_obj_t * obj)
lv_coord_t lv_obj_get_scroll_top(lv_obj_t * obj)
{
if(obj->spec_attr == NULL) return 0;
return -obj->spec_attr->scroll.y;
@@ -225,7 +225,7 @@ lv_coord_t lv_obj_get_scroll_bottom(lv_obj_t * obj)
* @param obj
* @return
*/
lv_coord_t lv_obj_get_scroll_left(const lv_obj_t * obj)
lv_coord_t lv_obj_get_scroll_left(lv_obj_t * obj)
{
LV_ASSERT_OBJ(obj, LV_OBJX_NAME);
@@ -235,8 +235,8 @@ lv_coord_t lv_obj_get_scroll_left(const lv_obj_t * obj)
if(obj->spec_attr == NULL) return 0;
return -obj->spec_attr->scroll.x;
}
/*With RTL base direction scrolling the left is normal so find the left most coordinate*/
else {
lv_coord_t pad_right = lv_obj_get_style_pad_right(obj, LV_OBJ_PART_MAIN);
lv_coord_t pad_left = lv_obj_get_style_pad_left(obj, LV_OBJ_PART_MAIN);
@@ -258,7 +258,6 @@ lv_coord_t lv_obj_get_scroll_left(const lv_obj_t * obj)
self_w -= lv_obj_get_scroll_x(obj);
return LV_MATH_MAX(child_res, self_w);
}
}
/**
@@ -272,8 +271,14 @@ lv_coord_t lv_obj_get_scroll_right(lv_obj_t * obj)
{
LV_ASSERT_OBJ(obj, LV_OBJX_NAME);
/* Unlike `scroll_left`, `scroll_right` should be calculated regardless to the base direction.
* It's because `scroll_x` is always measured from the left side of the object hence there is no information about right side. */
/* With RTL base dir can't scroll to the object out on the right.
* So simply use the current scroll position as "right size"*/
if(lv_obj_get_base_dir(obj) == LV_BIDI_DIR_RTL) {
if(obj->spec_attr == NULL) return 0;
return obj->spec_attr->scroll.x;
}
/*With other base direction (LTR) scrolling to the right is normal so find the right most coordinate*/
lv_coord_t child_res = LV_COORD_MIN;
lv_obj_t * child = lv_obj_get_child(obj, NULL);
if(child) {
@@ -292,14 +297,9 @@ lv_coord_t lv_obj_get_scroll_right(lv_obj_t * obj)
child_res -= (obj->coords.x2 - pad_right);
lv_coord_t self_w;
/*With RTL base dir self_width is handled in `scroll_right`*/
if(lv_obj_get_base_dir(obj) != LV_BIDI_DIR_RTL) {
self_w = _lv_obj_get_self_width(obj);
self_w = self_w - (lv_obj_get_width(obj) - pad_right - pad_left);
self_w -= lv_obj_get_scroll_x(obj);
} else {
self_w = LV_COORD_MIN;
}
return LV_MATH_MAX(child_res, self_w);
}

4
src/lv_core/lv_obj_scroll.h
View File

@@ -108,7 +108,7 @@ lv_coord_t lv_obj_get_scroll_y(const struct _lv_obj_t * obj);
* @param obj
* @return
*/
lv_coord_t lv_obj_get_scroll_top(const struct _lv_obj_t * obj);
lv_coord_t lv_obj_get_scroll_top(struct _lv_obj_t * obj);
/**
* Return the height of the area below the parent.
@@ -127,7 +127,7 @@ lv_coord_t lv_obj_get_scroll_bottom(struct _lv_obj_t * obj);
* @param obj
* @return
*/
lv_coord_t lv_obj_get_scroll_left(const struct _lv_obj_t * obj);
lv_coord_t lv_obj_get_scroll_left(struct _lv_obj_t * obj);
/**
* Return the width of the area below the object.