/**
* Set the label to draw (or not draw) background specified in its style's body
* @param label pointer to a label object
* @param body_en true: draw body; false: don't draw body
*/
void lv_label_set_body_draw(lv_obj_t *label, bool body_en)
{
lv_label_ext_t * ext = lv_obj_get_ext_attr(label);
ext->body_draw = body_en == false ? 0 : 1;
lv_obj_refresh_ext_size(label);
lv_obj_invalidate(label);
}
/**
* Set a style of a slider
* @param slider pointer to a slider object
* @param type which style should be set
* @param style pointer to a style
*/
void lv_slider_set_style(lv_obj_t *slider, lv_slider_style_t type, lv_style_t *style)
{
lv_slider_ext_t * ext = lv_obj_get_ext_attr(slider);
switch (type) {
case LV_SLIDER_STYLE_BG:
lv_bar_set_style(slider, LV_BAR_STYLE_BG, style);
break;
case LV_SLIDER_STYLE_INDIC:
lv_bar_set_style(slider, LV_BAR_STYLE_INDIC, style);
break;
case LV_SLIDER_STYLE_KNOB:
ext->style_knob = style;
lv_obj_refresh_ext_size(slider);
break;
}
}
/**
* Set a style of a drop down list
* @param ddlist pointer to a drop down list object
* @param type which style should be set
* @param style pointer to a style
*/
void lv_ddlist_set_style(lv_obj_t *ddlist, lv_ddlist_style_t type, lv_style_t *style)
{
lv_ddlist_ext_t * ext = lv_obj_get_ext_attr(ddlist);
switch (type) {
case LV_DDLIST_STYLE_BG:
lv_page_set_style(ddlist, LV_PAGE_STYLE_BG, style);
break;
case LV_DDLIST_STYLE_SB:
lv_page_set_style(ddlist, LV_PAGE_STYLE_SB, style);
break;
case LV_DDLIST_STYLE_SEL:
ext->sel_style = style;
lv_obj_t *scrl = lv_page_get_scrl(ddlist);
lv_obj_refresh_ext_size(scrl); /*Because of the wider selected rectangle*/
break;
}
}
/**
* Set a style of a page
* @param page pointer to a page object
* @param type which style should be set
* @param style pointer to a style
* */
void lv_page_set_style(lv_obj_t *page, lv_page_style_t type, lv_style_t *style)
{
lv_page_ext_t * ext = lv_obj_get_ext_attr(page);
switch (type) {
case LV_PAGE_STYLE_BG:
lv_obj_set_style(page, style);
break;
case LV_PAGE_STYLE_SCRL:
lv_obj_set_style(ext->scrl, style);
break;
case LV_PAGE_STYLE_SB:
ext->sb.style = style;
lv_area_set_height(&ext->sb.hor_area, ext->sb.style->body.padding.inner);
lv_area_set_width(&ext->sb.ver_area, ext->sb.style->body.padding.inner);
lv_page_sb_refresh(page);
lv_obj_refresh_ext_size(page);
lv_obj_invalidate(page);
break;
}
}
/**
* Signal function of the page
* @param page pointer to a page object
* @param sign a signal type from lv_signal_t enum
* @param param pointer to a signal specific variable
* @return LV_RES_OK: the object is not deleted in the function; LV_RES_INV: the object is deleted
*/
static lv_res_t lv_page_signal(lv_obj_t * page, lv_signal_t sign, void * param)
{
lv_res_t res;
/* Include the ancient signal function */
res = ancestor_signal(page, sign, param);
if(res != LV_RES_OK) return res;
lv_page_ext_t * ext = lv_obj_get_ext_attr(page);
lv_style_t * style = lv_obj_get_style(page);
lv_obj_t * child;
if(sign == LV_SIGNAL_CHILD_CHG) { /*Automatically move children to the scrollable object*/
child = lv_obj_get_child(page, NULL);
while(child != NULL) {
if(lv_obj_is_protected(child, LV_PROTECT_PARENT) == false) {
lv_obj_t * tmp = child;
child = lv_obj_get_child(page, child); /*Get the next child before move this*/
lv_obj_set_parent(tmp, ext->scrl);
} else {
child = lv_obj_get_child(page, child);
}
}
}
else if(sign == LV_SIGNAL_STYLE_CHG) {
/*If no hor_fit enabled set the scrollable's width to the page's width*/
if(lv_cont_get_hor_fit(ext->scrl) == false) {
lv_obj_set_width(ext->scrl, lv_obj_get_width(page) - 2 * style->body.padding.hor);
} else {
ext->scrl->signal_func(ext->scrl, LV_SIGNAL_CORD_CHG, &ext->scrl->coords);
}
/*The scrollbars are important only if they are visible now*/
if(ext->sb.hor_draw || ext->sb.ver_draw) lv_page_sb_refresh(page);
/*Refresh the ext. size because the scrollbars might be positioned out of the page*/
lv_obj_refresh_ext_size(page);
}
else if(sign == LV_SIGNAL_CORD_CHG) {
/*Refresh the scrollbar and notify the scrl if the size is changed*/
if(ext->scrl != NULL && (lv_obj_get_width(page) != lv_area_get_width(param) ||
lv_obj_get_height(page) != lv_area_get_height(param)))
{
/*If no hor_fit enabled set the scrollable's width to the page's width*/
if(lv_cont_get_hor_fit(ext->scrl) == false) {
lv_obj_set_width(ext->scrl, lv_obj_get_width(page) - 2 * style->body.padding.hor);
}
ext->scrl->signal_func(ext->scrl, LV_SIGNAL_CORD_CHG, &ext->scrl->coords);
/*The scrollbars are important only if they are visible now*/
if(ext->sb.hor_draw || ext->sb.ver_draw) lv_page_sb_refresh(page);
}
}
else if(sign == LV_SIGNAL_PRESSED) {
if(ext->pr_action != NULL) {
ext->pr_action(page);
}
}
else if(sign == LV_SIGNAL_RELEASED) {
if(lv_indev_is_dragging(lv_indev_get_act()) == false) {
if(ext->rel_action != NULL) {
ext->rel_action(page);
}
}
}
else if(sign == LV_SIGNAL_REFR_EXT_SIZE) {
/*Ensure ext. size for the scrollbars if they are out of the page*/
if(page->ext_size < (-ext->sb.style->body.padding.hor)) page->ext_size = -ext->sb.style->body.padding.hor;
if(page->ext_size < (-ext->sb.style->body.padding.ver)) page->ext_size = -ext->sb.style->body.padding.ver;
}
else if(sign == LV_SIGNAL_GET_TYPE) {
lv_obj_type_t * buf = param;
uint8_t i;
for(i = 0; i < LV_MAX_ANCESTOR_NUM - 1; i++) { /*Find the last set data*/
if(buf->type[i] == NULL) break;
}
buf->type[i] = "lv_page";
}
return res;
}
