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indev scroll clean up

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This commit is contained in:
Gabor Kiss-Vamosi 2020-10-13 16:35:00 +02:00
parent 4eda4d59fc
commit d96a2c890c
2 changed files with 171 additions and 162 deletions
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2
src/lv_core/lv_indev.c
View File

@ -211,7 +211,7 @@ void lv_indev_set_cursor(lv_indev_t * indev, lv_obj_t * cur_obj)
indev->cursor = cur_obj;
lv_obj_set_parent(indev->cursor, lv_disp_get_layer_sys(indev->driver.disp));
lv_obj_set_pos(indev->cursor, indev->proc.types.pointer.act_point.x, indev->proc.types.pointer.act_point.y);
lv_obj_add_flag(indev->cursor, LV_OBJ_FLAG_CLICKABLE);
lv_obj_clear_flag(indev->cursor, LV_OBJ_FLAG_CLICKABLE);
}
#if LV_USE_GROUP

331
src/lv_core/lv_indev_scroll.c
View File

@ -21,7 +21,8 @@
/**********************
* STATIC PROTOTYPES
**********************/
static lv_obj_t * find_scroll_obj(lv_indev_proc_t * proc);
static void init_scroll_limits(lv_indev_proc_t * proc);
static lv_coord_t find_snap_point_x(const lv_obj_t * obj, lv_coord_t min, lv_coord_t max, lv_coord_t ofs);
static lv_coord_t find_snap_point_y(const lv_obj_t * obj, lv_coord_t min, lv_coord_t max, lv_coord_t ofs);
static void scroll_limit_diff(lv_indev_proc_t * proc, lv_coord_t * diff_x, lv_coord_t * diff_y);
@ -47,174 +48,24 @@ static lv_coord_t elastic_diff(lv_obj_t * obj, lv_coord_t diff, lv_coord_t scrol
*/
void _lv_scroll_handler(lv_indev_proc_t * proc)
{
lv_obj_t * scroll_candidate_obj = NULL;
lv_scroll_dir_t dirs_candidate = LV_SCROLL_DIR_NONE;
lv_indev_t * indev_act = lv_indev_get_act();
lv_coord_t scroll_limit = indev_act->driver.scroll_limit;
lv_obj_t * scroll_obj = proc->types.pointer.scroll_obj;
/*If there is no scroll object yet try to find one*/
if(proc->types.pointer.scroll_obj == NULL) {
if(scroll_obj == NULL) {
proc->types.pointer.scroll_sum.x += proc->types.pointer.vect.x;
proc->types.pointer.scroll_sum.y += proc->types.pointer.vect.y;
proc->types.pointer.scroll_obj = proc->types.pointer.act_obj;
scroll_obj = find_scroll_obj(proc);
if(scroll_obj == NULL) return;
/* Go until find an scrollable object in the current direction
* More precisely:
* 1. Check the pressed object and all of its ancestors and try to find an object which is scrollable
* 2. Scrollable means it has some content out of it's area
* 3. If an object can be scrolled into the current direction then use it ("real match"")
* 4. If can be scrolled on the current axis (hor/ver) save it as candidate (at least show an elastic scroll effect)
* 5. Use the last candidate. Always the "deepest" parent or the object from point 3 */
while(proc->types.pointer.scroll_obj) {
if(lv_obj_has_flag(proc->types.pointer.scroll_obj, LV_OBJ_FLAG_SCROLLABLE) == false) {
proc->types.pointer.scroll_obj = lv_obj_get_parent(proc->types.pointer.scroll_obj);
continue;
}
init_scroll_limits(proc);
/*Decide if it's a horizontal or vertical scroll*/
bool hor_en = false;
bool ver_en = false;
if(LV_MATH_ABS(proc->types.pointer.scroll_sum.x) > LV_MATH_ABS(proc->types.pointer.scroll_sum.y)) {
hor_en = true;
}
else {
ver_en = true;
}
/*Consider both up-down or left/right scrollable according to the current direction*/
bool up_en = ver_en;
bool down_en = ver_en;
bool left_en = hor_en;
bool right_en = hor_en;
/*The object might have disabled some directions.*/
lv_dir_t scroll_dir = proc->types.pointer.scroll_obj->scroll_dir;
if((scroll_dir & LV_DIR_LEFT) == 0) left_en = false;
if((scroll_dir & LV_DIR_RIGHT) == 0) right_en = false;
if((scroll_dir & LV_DIR_TOP) == 0) up_en = false;
if((scroll_dir & LV_DIR_BOTTOM) == 0) down_en = false;
/*The object is scrollable to a direction if its content overflow in that direction. */
lv_coord_t st = lv_obj_get_scroll_top(proc->types.pointer.scroll_obj);
lv_coord_t sb = lv_obj_get_scroll_bottom(proc->types.pointer.scroll_obj);
lv_coord_t sl = lv_obj_get_scroll_left(proc->types.pointer.scroll_obj);
lv_coord_t sr = lv_obj_get_scroll_right(proc->types.pointer.scroll_obj);
/* If this object is scrollable into the current scroll direction then save it as a candidate.
* It's important only to be scrollable on the current axis (hor/ver) because if the scroll
* is propagated to this object it can show at least elastic scroll effect.
* But if not hor/ver scrollable do not scroll it at all (so it's not a good candidate) */
if((st > 0 || sb > 0) &&
((up_en && proc->types.pointer.scroll_sum.y >= scroll_limit) ||
(down_en && proc->types.pointer.scroll_sum.y <= - scroll_limit)))
{
scroll_candidate_obj = proc->types.pointer.scroll_obj;
dirs_candidate = LV_SCROLL_DIR_VER;
}
if((sl > 0 || sr > 0) &&
((left_en && proc->types.pointer.scroll_sum.x >= scroll_limit) ||
(right_en && proc->types.pointer.scroll_sum.x <= - scroll_limit)))
{
scroll_candidate_obj = proc->types.pointer.scroll_obj;
dirs_candidate = LV_SCROLL_DIR_HOR;
}
if(st <= 0) up_en = false;
if(sb <= 0) down_en = false;
if(sl <= 0) left_en = false;
if(sr <= 0) right_en = false;
/*If the object really can be scrolled into the current direction the use it. */
if((left_en && proc->types.pointer.scroll_sum.x >= scroll_limit) ||
(right_en && proc->types.pointer.scroll_sum.x <= - scroll_limit) ||
(up_en && proc->types.pointer.scroll_sum.y >= scroll_limit) ||
(down_en && proc->types.pointer.scroll_sum.y <= - scroll_limit))
{
proc->types.pointer.scroll_dir = hor_en ? LV_SCROLL_DIR_HOR : LV_SCROLL_DIR_VER;
break;
}
/*Try the parent */
proc->types.pointer.scroll_obj = lv_obj_get_parent(proc->types.pointer.scroll_obj);
}
/*Use the last candidate*/
if(proc->types.pointer.scroll_obj == NULL) {
if(scroll_candidate_obj) {
proc->types.pointer.scroll_dir = dirs_candidate;
proc->types.pointer.scroll_obj = scroll_candidate_obj;
} else {
return;
}
}
proc->types.pointer.scroll_sum.x = 0;
proc->types.pointer.scroll_sum.y = 0;
lv_obj_t * obj = proc->types.pointer.scroll_obj;
/*If there no STOP allow scrolling anywhere*/
if(lv_obj_has_flag(obj, LV_OBJ_FLAG_SCROLL_STOP) == false) {
lv_area_set(&proc->types.pointer.scroll_area, LV_COORD_MIN, LV_COORD_MIN, LV_COORD_MAX, LV_COORD_MAX);
}
/*With STOP limit the scrolling to the perv and next snap point*/
else {
switch(obj->snap_align_y) {
case LV_SCROLL_SNAP_ALIGN_START:
proc->types.pointer.scroll_area.y1 = find_snap_point_y(obj, obj->coords.y1 + 1, LV_COORD_MAX, 0);
proc->types.pointer.scroll_area.y2 = find_snap_point_y(obj, LV_COORD_MIN, obj->coords.y1 - 1, 0);
break;
case LV_SCROLL_SNAP_ALIGN_END:
proc->types.pointer.scroll_area.y1 = find_snap_point_y(obj, obj->coords.y2, LV_COORD_MAX, 0);
proc->types.pointer.scroll_area.y2 = find_snap_point_y(obj, LV_COORD_MIN, obj->coords.y2, 0);
break;
case LV_SCROLL_SNAP_ALIGN_CENTER: {
lv_coord_t y_mid = obj->coords.y1 + lv_area_get_height(&obj->coords) / 2;
proc->types.pointer.scroll_area.y1 = find_snap_point_y(obj, y_mid + 1, LV_COORD_MAX, 0);
proc->types.pointer.scroll_area.y2 = find_snap_point_y(obj, LV_COORD_MIN, y_mid - 1, 0);
break;
}
default:
proc->types.pointer.scroll_area.y1 = LV_COORD_MIN;
proc->types.pointer.scroll_area.y2 = LV_COORD_MAX;
break;
}
switch(obj->snap_align_x) {
case LV_SCROLL_SNAP_ALIGN_START:
proc->types.pointer.scroll_area.x1 = find_snap_point_x(obj, obj->coords.x1, LV_COORD_MAX, 0);
proc->types.pointer.scroll_area.x2 = find_snap_point_x(obj, LV_COORD_MIN, obj->coords.x1, 0);
break;
case LV_SCROLL_SNAP_ALIGN_END:
proc->types.pointer.scroll_area.x1 = find_snap_point_x(obj, obj->coords.x2, LV_COORD_MAX, 0);
proc->types.pointer.scroll_area.x2 = find_snap_point_x(obj, LV_COORD_MIN, obj->coords.x2, 0);
break;
case LV_SCROLL_SNAP_ALIGN_CENTER: {
lv_coord_t x_mid = obj->coords.x1 + lv_area_get_width(&obj->coords) / 2;
proc->types.pointer.scroll_area.x1 = find_snap_point_x(obj, x_mid + 1, LV_COORD_MAX, 0);
proc->types.pointer.scroll_area.x2 = find_snap_point_x(obj, LV_COORD_MIN, x_mid - 1, 0);
break;
}
default:
proc->types.pointer.scroll_area.x1 = LV_COORD_MIN;
proc->types.pointer.scroll_area.x2 = LV_COORD_MAX;
break;
}
}
lv_signal_send(obj, LV_SIGNAL_SCROLL_BEGIN, indev_act);
lv_indev_t * indev_act = lv_indev_get_act();
lv_signal_send(scroll_obj, LV_SIGNAL_SCROLL_BEGIN, indev_act);
if(proc->reset_query) return;
lv_event_send(obj, LV_EVENT_SCROLL_BEGIN, indev_act);
lv_event_send(scroll_obj, LV_EVENT_SCROLL_BEGIN, indev_act);
if(proc->reset_query) return;
}
/*If there is no scroll object there is nothing to do*/
lv_obj_t * scroll_obj = proc->types.pointer.scroll_obj;
if(scroll_obj == NULL) return;
/*Set new position or scroll if the vector is not zero*/
if(proc->types.pointer.vect.x != 0 || proc->types.pointer.vect.y != 0) {
lv_coord_t diff_x = 0;
@ -305,13 +156,12 @@ void _lv_scroll_throw_handler(lv_indev_proc_t * proc)
else {
lv_coord_t diff_x = scroll_throw_predict_x(proc);
proc->types.pointer.scroll_throw_vect.x = 0;
scroll_limit_diff(proc, NULL, &diff_x);
scroll_limit_diff(proc, &diff_x, NULL);
lv_coord_t x = find_snap_point_x(scroll_obj, LV_COORD_MIN, LV_COORD_MAX, diff_x);
lv_obj_scroll_by(scroll_obj, x + diff_x, 0, LV_ANIM_ON);
}
}
/*Check if the scroll has finished */
if(proc->types.pointer.scroll_throw_vect.x == 0 && proc->types.pointer.scroll_throw_vect.y == 0) {
/*Revert if scrolled in*/
@ -388,6 +238,165 @@ lv_coord_t _lv_scroll_throw_predict(lv_indev_t * indev, lv_dir_t dir)
* STATIC FUNCTIONS
**********************/
static lv_obj_t * find_scroll_obj(lv_indev_proc_t * proc)
{
lv_obj_t * obj_candidate = NULL;
lv_dir_t dir_candidate = LV_DIR_NONE;
lv_indev_t * indev_act = lv_indev_get_act();
lv_coord_t scroll_limit = indev_act->driver.scroll_limit;
/* Go until find an scrollable object in the current direction
* More precisely:
* 1. Check the pressed object and all of its ancestors and try to find an object which is scrollable
* 2. Scrollable means it has some content out of it's area
* 3. If an object can be scrolled into the current direction then use it ("real match"")
* 4. If can be scrolled on the current axis (hor/ver) save it as candidate (at least show an elastic scroll effect)
* 5. Use the last candidate. Always the "deepest" parent or the object from point 3 */
lv_obj_t * obj_act = proc->types.pointer.act_obj;
while(obj_act) {
if(lv_obj_has_flag(obj_act, LV_OBJ_FLAG_SCROLLABLE) == false) {
obj_act = lv_obj_get_parent(obj_act);
continue;
}
/*Decide if it's a horizontal or vertical scroll*/
bool hor_en = false;
bool ver_en = false;
if(LV_MATH_ABS(proc->types.pointer.scroll_sum.x) > LV_MATH_ABS(proc->types.pointer.scroll_sum.y)) {
hor_en = true;
}
else {
ver_en = true;
}
/*Consider both up-down or left/right scrollable according to the current direction*/
bool up_en = ver_en;
bool down_en = ver_en;
bool left_en = hor_en;
bool right_en = hor_en;
/*The object might have disabled some directions.*/
lv_dir_t scroll_dir = obj_act->scroll_dir;
if((scroll_dir & LV_DIR_LEFT) == 0) left_en = false;
if((scroll_dir & LV_DIR_RIGHT) == 0) right_en = false;
if((scroll_dir & LV_DIR_TOP) == 0) up_en = false;
if((scroll_dir & LV_DIR_BOTTOM) == 0) down_en = false;
/*The object is scrollable to a direction if its content overflow in that direction. */
lv_coord_t st = lv_obj_get_scroll_top(obj_act);
lv_coord_t sb = lv_obj_get_scroll_bottom(obj_act);
lv_coord_t sl = lv_obj_get_scroll_left(obj_act);
lv_coord_t sr = lv_obj_get_scroll_right(obj_act);
/* If this object is scrollable into the current scroll direction then save it as a candidate.
* It's important only to be scrollable on the current axis (hor/ver) because if the scroll
* is propagated to this object it can show at least elastic scroll effect.
* But if not hor/ver scrollable do not scroll it at all (so it's not a good candidate) */
if((st > 0 || sb > 0) &&
((up_en && proc->types.pointer.scroll_sum.y >= scroll_limit) ||
(down_en && proc->types.pointer.scroll_sum.y <= - scroll_limit)))
{
obj_candidate = obj_act;
dir_candidate = LV_SCROLL_DIR_VER;
}
if((sl > 0 || sr > 0) &&
((left_en && proc->types.pointer.scroll_sum.x >= scroll_limit) ||
(right_en && proc->types.pointer.scroll_sum.x <= - scroll_limit)))
{
obj_candidate = obj_act;
dir_candidate = LV_SCROLL_DIR_HOR;
}
if(st <= 0) up_en = false;
if(sb <= 0) down_en = false;
if(sl <= 0) left_en = false;
if(sr <= 0) right_en = false;
/*If the object really can be scrolled into the current direction the use it. */
if((left_en && proc->types.pointer.scroll_sum.x >= scroll_limit) ||
(right_en && proc->types.pointer.scroll_sum.x <= - scroll_limit) ||
(up_en && proc->types.pointer.scroll_sum.y >= scroll_limit) ||
(down_en && proc->types.pointer.scroll_sum.y <= - scroll_limit))
{
proc->types.pointer.scroll_dir = hor_en ? LV_SCROLL_DIR_HOR : LV_SCROLL_DIR_VER;
break;
}
/*Try the parent */
obj_act = lv_obj_get_parent(obj_act);
}
/*Use the last candidate*/
if(obj_candidate) {
proc->types.pointer.scroll_dir = dir_candidate;
proc->types.pointer.scroll_obj = obj_candidate;
proc->types.pointer.scroll_sum.x = 0;
proc->types.pointer.scroll_sum.y = 0;
}
return obj_candidate;
}
static void init_scroll_limits(lv_indev_proc_t * proc)
{
lv_obj_t * obj = proc->types.pointer.scroll_obj;
/*If there no STOP allow scrolling anywhere*/
if(lv_obj_has_flag(obj, LV_OBJ_FLAG_SCROLL_STOP) == false) {
lv_area_set(&proc->types.pointer.scroll_area, LV_COORD_MIN, LV_COORD_MIN, LV_COORD_MAX, LV_COORD_MAX);
}
/*With STOP limit the scrolling to the perv and next snap point*/
else {
switch(obj->snap_align_y) {
case LV_SCROLL_SNAP_ALIGN_START:
proc->types.pointer.scroll_area.y1 = find_snap_point_y(obj, obj->coords.y1 + 1, LV_COORD_MAX, 0);
proc->types.pointer.scroll_area.y2 = find_snap_point_y(obj, LV_COORD_MIN, obj->coords.y1 - 1, 0);
break;
case LV_SCROLL_SNAP_ALIGN_END:
proc->types.pointer.scroll_area.y1 = find_snap_point_y(obj, obj->coords.y2, LV_COORD_MAX, 0);
proc->types.pointer.scroll_area.y2 = find_snap_point_y(obj, LV_COORD_MIN, obj->coords.y2, 0);
break;
case LV_SCROLL_SNAP_ALIGN_CENTER: {
lv_coord_t y_mid = obj->coords.y1 + lv_area_get_height(&obj->coords) / 2;
proc->types.pointer.scroll_area.y1 = find_snap_point_y(obj, y_mid + 1, LV_COORD_MAX, 0);
proc->types.pointer.scroll_area.y2 = find_snap_point_y(obj, LV_COORD_MIN, y_mid - 1, 0);
break;
}
default:
proc->types.pointer.scroll_area.y1 = LV_COORD_MIN;
proc->types.pointer.scroll_area.y2 = LV_COORD_MAX;
break;
}
switch(obj->snap_align_x) {
case LV_SCROLL_SNAP_ALIGN_START:
proc->types.pointer.scroll_area.x1 = find_snap_point_x(obj, obj->coords.x1, LV_COORD_MAX, 0);
proc->types.pointer.scroll_area.x2 = find_snap_point_x(obj, LV_COORD_MIN, obj->coords.x1, 0);
break;
case LV_SCROLL_SNAP_ALIGN_END:
proc->types.pointer.scroll_area.x1 = find_snap_point_x(obj, obj->coords.x2, LV_COORD_MAX, 0);
proc->types.pointer.scroll_area.x2 = find_snap_point_x(obj, LV_COORD_MIN, obj->coords.x2, 0);
break;
case LV_SCROLL_SNAP_ALIGN_CENTER: {
lv_coord_t x_mid = obj->coords.x1 + lv_area_get_width(&obj->coords) / 2;
proc->types.pointer.scroll_area.x1 = find_snap_point_x(obj, x_mid + 1, LV_COORD_MAX, 0);
proc->types.pointer.scroll_area.x2 = find_snap_point_x(obj, LV_COORD_MIN, x_mid - 1, 0);
break;
}
default:
proc->types.pointer.scroll_area.x1 = LV_COORD_MIN;
proc->types.pointer.scroll_area.x2 = LV_COORD_MAX;
break;
}
}
/*Allow scrolling on the edges. It will be reverted to the edge due to snapping anyway*/
if(proc->types.pointer.scroll_area.x1 == 0) proc->types.pointer.scroll_area.x1 = LV_COORD_MIN;
if(proc->types.pointer.scroll_area.x2 == 0) proc->types.pointer.scroll_area.x2 = LV_COORD_MAX;
if(proc->types.pointer.scroll_area.y1 == 0) proc->types.pointer.scroll_area.y1 = LV_COORD_MIN;
if(proc->types.pointer.scroll_area.y2 == 0) proc->types.pointer.scroll_area.y2 = LV_COORD_MAX;
}
static lv_coord_t find_snap_point_x(const lv_obj_t * obj, lv_coord_t min, lv_coord_t max, lv_coord_t ofs)
{
if(obj->snap_align_x == LV_SCROLL_SNAP_ALIGN_NONE) return 0;