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Merge pull request #879 from manison/patch/focus-visible-objects-only

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Modify lv_group_focus_next/prev so that hidden objects don't receive focus
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embeddedt 2019-02-21 10:38:28 -05:00 committed by GitHub
commit 1f25bfb60b
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1 changed files with 60 additions and 47 deletions
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107
lv_core/lv_group.c
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@ -26,6 +26,7 @@
static void style_mod_def(lv_style_t * style);
static void style_mod_edit_def(lv_style_t * style);
static void refresh_theme(lv_group_t * g, lv_theme_t * th);
static void focus_next_core(lv_group_t * group, void * (*begin)(const lv_ll_t *), void * (*move)(const lv_ll_t *, const void *));
static void lv_group_refocus(lv_group_t * g);
/**********************
@ -207,29 +208,7 @@ void lv_group_focus_obj(lv_obj_t * obj)
*/
void lv_group_focus_next(lv_group_t * group)
{
if(group->frozen) return;
if(group->obj_focus) {
(*group->obj_focus)->signal_func(*group->obj_focus, LV_SIGNAL_DEFOCUS, NULL);
lv_obj_invalidate(*group->obj_focus);
}
lv_obj_t ** obj_next;
if(group->obj_focus == NULL) obj_next = lv_ll_get_head(&group->obj_ll);
else obj_next = lv_ll_get_next(&group->obj_ll, group->obj_focus);
if(obj_next == NULL) {
if(group->wrap) obj_next = lv_ll_get_head(&group->obj_ll);
else obj_next = lv_ll_get_tail(&group->obj_ll);
}
group->obj_focus = obj_next;
if(group->obj_focus) {
(*group->obj_focus)->signal_func(*group->obj_focus, LV_SIGNAL_FOCUS, NULL);
lv_obj_invalidate(*group->obj_focus);
if(group->focus_cb) group->focus_cb(group);
}
focus_next_core(group, lv_ll_get_head, lv_ll_get_next);
}
/**
@ -238,30 +217,7 @@ void lv_group_focus_next(lv_group_t * group)
*/
void lv_group_focus_prev(lv_group_t * group)
{
if(group->frozen) return;
if(group->obj_focus) {
(*group->obj_focus)->signal_func(*group->obj_focus, LV_SIGNAL_DEFOCUS, NULL);
lv_obj_invalidate(*group->obj_focus);
}
lv_obj_t ** obj_next;
if(group->obj_focus == NULL) obj_next = lv_ll_get_tail(&group->obj_ll);
else obj_next = lv_ll_get_prev(&group->obj_ll, group->obj_focus);
if(obj_next == NULL) {
if(group->wrap) obj_next = lv_ll_get_tail(&group->obj_ll);
else obj_next = lv_ll_get_head(&group->obj_ll);
}
group->obj_focus = obj_next;
if(group->obj_focus != NULL) {
(*group->obj_focus)->signal_func(*group->obj_focus, LV_SIGNAL_FOCUS, NULL);
lv_obj_invalidate(*group->obj_focus);
if(group->focus_cb) group->focus_cb(group);
}
focus_next_core(group, lv_ll_get_tail, lv_ll_get_prev);
}
/**
@ -567,4 +523,61 @@ static void refresh_theme(lv_group_t * g, lv_theme_t * th)
}
}
static void focus_next_core(lv_group_t * group, void * (*begin)(const lv_ll_t *), void * (*move)(const lv_ll_t *, const void *))
{
if (group->frozen) return;
lv_obj_t ** obj_next = group->obj_focus;
lv_obj_t ** obj_sentinel = NULL;
bool can_move = true;
bool can_begin = true;
for(;;) {
if(obj_next == NULL) {
if(group->wrap || obj_sentinel == NULL) {
if(!can_begin) return;
obj_next = begin(&group->obj_ll);
can_move = false;
can_begin = false;
} else {
/*Currently focused object is the last/first in the group, keep it that way*/
return;
}
}
if(obj_sentinel == NULL) {
obj_sentinel = obj_next;
if(obj_sentinel == NULL) return; /*Group is empty*/
}
if(can_move) {
obj_next = move(&group->obj_ll, obj_next);
/*Give up if we walked the entire list and haven't found another visible object*/
if(obj_next == obj_sentinel) return;
}
can_move = true;
if(obj_next == NULL) continue;
/*Hidden objects don't receive focus*/
if(!lv_obj_get_hidden(*obj_next)) break;
}
if(obj_next == group->obj_focus) return; /*There's only one visible object and it's already focused*/
if(group->obj_focus) {
(*group->obj_focus)->signal_func(*group->obj_focus, LV_SIGNAL_DEFOCUS, NULL);
lv_obj_invalidate(*group->obj_focus);
}
group->obj_focus = obj_next;
(*group->obj_focus)->signal_func(*group->obj_focus, LV_SIGNAL_FOCUS, NULL);
lv_obj_invalidate(*group->obj_focus);
if(group->focus_cb) group->focus_cb(group);
}
#endif /*USE_LV_GROUP != 0*/