int
glw_scroll_handle_event(glw_scroll_control_t *gs,
glw_t *w, event_t *e)
{
if(event_is_type(e, EVENT_SCROLL)) {
event_scroll_t *es = (event_scroll_t *)e;
gs->bottom_anchored = 0;
gs->target_pos += es->dY;
w->glw_flags |= GLW_UPDATE_METRICS;
glw_schedule_refresh(w->glw_root, 0);
return 1;
}
return 0;
}
void
glw_scroll_handle_scroll(glw_scroll_control_t *gsc, glw_t *w, glw_scroll_t *gs)
{
int top = GLW_MAX(gs->value * (gsc->total_size - gsc->page_size
+ gsc->scroll_threshold_post), 0);
gsc->target_pos = top;
glw_schedule_refresh(w->glw_root, 0);
if(gsc->chase_focus == 0)
return;
glw_t *c = w->glw_class->gc_find_visible_child(w);
if(c == NULL)
return;
if(glw_is_focused(w)) {
glw_focus_set(w->glw_root, c, GLW_FOCUS_SET_SUGGESTED, "Scroll");
} else {
w->glw_focused = c;
glw_signal0(w, GLW_SIGNAL_FOCUS_CHILD_INTERACTIVE, c);
}
}
int
glw_scroll_handle_pointer_event_filter(glw_scroll_control_t *gs,
glw_t *w,
const glw_pointer_event_t *gpe)
{
glw_root_t *gr = w->glw_root;
const int grabbed = gr->gr_pointer_grab_scroll == w;
switch(gpe->type) {
default:
return 0;
case GLW_POINTER_TOUCH_START:
gr->gr_pointer_grab_scroll = w;
gs->initial_pos = gs->target_pos;
gs->initial_touch_x = gpe->local_x;
gs->initial_touch_y = gpe->local_y;
gs->last_touch_x = gpe->local_x;
gs->last_touch_y = gpe->local_y;
gs->last_touch_time = gpe->ts;
gs->touch_velocity = 0;
gs->kinetic_scroll = 0;
return 0;
case GLW_POINTER_TOUCH_END:
if(fabsf(gs->touch_velocity) > 10) {
gs->kinetic_scroll = gs->touch_velocity;
glw_schedule_refresh(w->glw_root, 0);
}
if(grabbed)
gr->gr_pointer_grab_scroll = NULL;
return 0;
}
return 0;
}
int
glw_scroll_handle_pointer_event(glw_scroll_control_t *gs,
glw_t *w,
const glw_pointer_event_t *gpe)
{
glw_root_t *gr = w->glw_root;
int64_t dt;
const int grabbed = gr->gr_pointer_grab == w;
float v;
switch(gpe->type) {
case GLW_POINTER_SCROLL:
gs->target_pos += gs->page_size * gpe->delta_y;
w->glw_flags |= GLW_UPDATE_METRICS;
glw_schedule_refresh(w->glw_root, 0);
return 1;
case GLW_POINTER_FINE_SCROLL:
gs->target_pos += gpe->delta_y;
w->glw_flags |= GLW_UPDATE_METRICS;
glw_schedule_refresh(w->glw_root, 0);
return 1;
case GLW_POINTER_TOUCH_START:
gr->gr_pointer_grab = w;
gs->initial_pos = gs->target_pos;
gs->initial_touch_x = gpe->x;
gs->initial_touch_y = gpe->y;
gs->last_touch_x = gpe->x;
gs->last_touch_y = gpe->y;
gs->last_touch_time = gpe->ts;
gs->touch_velocity = 0;
gs->kinetic_scroll = 0;
return 1;
case GLW_POINTER_TOUCH_END:
if(fabsf(gs->touch_velocity) > 10)
gs->kinetic_scroll = gs->touch_velocity;
if(grabbed)
gr->gr_pointer_grab = NULL;
return 1;
case GLW_POINTER_TOUCH_CANCEL:
if(grabbed)
gr->gr_pointer_grab = NULL;
return 1;
case GLW_POINTER_FOCUS_MOTION:
if(!grabbed)
return 0;
gs->target_pos = (gpe->y - gs->initial_touch_y) * gs->page_size * 0.5 +
gs->initial_pos;
dt = gpe->ts - gs->last_touch_time;
if(dt > 100) {
v = 1000000.0 * (gpe->y - gs->last_touch_y) / dt;
gs->touch_velocity = v * 10;
}
gs->last_touch_time = gpe->ts;
gs->last_touch_x = gpe->x;
gs->last_touch_y = gpe->y;
w->glw_flags |= GLW_UPDATE_METRICS;
glw_schedule_refresh(w->glw_root, 0);
break;
default:
return 0;
}
return 0;
}
int
glw_scroll_handle_pointer_event(glw_scroll_control_t *gs,
glw_t *w,
const glw_pointer_event_t *gpe)
{
glw_root_t *gr = w->glw_root;
int64_t dt;
const int grabbed = gr->gr_pointer_grab_scroll == w;
float v;
switch(gpe->type) {
case GLW_POINTER_SCROLL:
gs->bottom_anchored = 0;
gs->target_pos += gs->page_size * gpe->delta_y;
w->glw_flags |= GLW_UPDATE_METRICS;
glw_schedule_refresh(w->glw_root, 0);
return 1;
case GLW_POINTER_FINE_SCROLL:
gs->bottom_anchored = 0;
gs->target_pos += gpe->delta_y;
w->glw_flags |= GLW_UPDATE_METRICS;
glw_schedule_refresh(w->glw_root, 0);
return 1;
case GLW_POINTER_TOUCH_CANCEL:
if(grabbed)
gr->gr_pointer_grab_scroll = NULL;
return 1;
case GLW_POINTER_FOCUS_MOTION:
if(!grabbed)
return 0;
gs->bottom_anchored = 0;
gs->target_pos = (gpe->local_y - gs->initial_touch_y) *
gs->page_size * 0.5 + gs->initial_pos;
const int max_value =
MAX(0, gs->total_size - gs->page_size + gs->scroll_threshold_post);
gs->target_pos = GLW_CLAMP(gs->target_pos, 0, max_value);
if(abs(gs->target_pos - gs->initial_pos) > 15) {
if(gr->gr_pointer_press != NULL) {
glw_path_modify(gr->gr_pointer_press, 0, GLW_IN_PRESSED_PATH, NULL);
gr->gr_pointer_press = NULL;
}
}
dt = gpe->ts - gs->last_touch_time;
if(dt > 100) {
v = 1000000.0 * (gpe->local_y - gs->last_touch_y) / dt;
gs->touch_velocity = v * 10;
}
gs->last_touch_time = gpe->ts;
gs->last_touch_x = gpe->local_x;
gs->last_touch_y = gpe->local_y;
w->glw_flags |= GLW_UPDATE_METRICS;
glw_schedule_refresh(w->glw_root, 0);
break;
default:
return 0;
}
return 0;
}
static void
glw_slideshow_layout(glw_t *w, const glw_rctx_t *rc)
{
glw_root_t *gr = w->glw_root;
glw_slideshow_t *s = (glw_slideshow_t *)w;
glw_t *c, *p, *n;
float delta;
int r = 0;
glw_reset_screensaver(w->glw_root);
delta = s->w.glw_root->gr_frameduration / (float)s->transition_time;
if((c = s->w.glw_focused) == NULL) {
c = s->w.glw_focused = glw_first_widget(&s->w);
if(c)
glw_copy_constraints(&s->w, c);
}
if(c == NULL)
return;
glw_schedule_refresh(gr, s->deadline);
if(s->deadline <= gr->gr_frame_start) {
s->deadline = gr->gr_frame_start + s->display_time;
c = glw_next_widget(c);
if(c == NULL)
c = glw_first_widget(&s->w);
if(c != NULL) {
glw_focus_open_path_close_all_other(c);
glw_copy_constraints(&s->w, c);
}
}
glw_layout0(c, rc);
r |= update_parent_alpha(c, GLW_MIN(c->glw_parent_alpha + delta, 1.0f));
/**
* Keep previous and next images 'hot' (ie, loaded into texture memory)
*/
p = glw_prev_widget(c);
if(p == NULL)
p = glw_last_widget(&s->w, 0);
if(p != NULL && p != c) {
r |= update_parent_alpha(p, GLW_MAX(p->glw_parent_alpha - delta, 0.0f));
glw_layout0(p, rc);
}
n = glw_next_widget(c);
if(n == NULL)
n = glw_first_widget(&s->w);
if(n != NULL && n != c) {
r |= update_parent_alpha(n, GLW_MAX(n->glw_parent_alpha - delta, 0.0f));
glw_layout0(n, rc);
}
if(r)
glw_need_refresh(w->glw_root, 0);
}
