/**
* Refresh the position of the roller. It uses the id stored in: ext->ddlist.selected_option_id
* @param roller pointer to a roller object
* @param anim_en true: refresh with animation; false: without animation
*/
static void refr_position(lv_obj_t *roller, bool anim_en)
{
lv_obj_t *roller_scrl = lv_page_get_scrl(roller);
lv_roller_ext_t * ext = lv_obj_get_ext_attr(roller);
lv_style_t * style_label = lv_obj_get_style(ext->ddlist.label);
const lv_font_t * font = style_label->text.font;
lv_coord_t font_h = lv_font_get_height_scale(font);
lv_coord_t h = lv_obj_get_height(roller);
int32_t id = ext->ddlist.sel_opt_id;
lv_coord_t line_y1 = id * (font_h + style_label->text.line_space) + ext->ddlist.label->coords.y1 - roller_scrl->coords.y1;
lv_coord_t new_y = - line_y1 + (h - font_h) / 2;
if(ext->ddlist.anim_time == 0 || anim_en == false) {
lv_obj_set_y(roller_scrl, new_y);
} else {
#if USE_LV_ANIMATION
lv_anim_t a;
a.var = roller_scrl;
a.start = lv_obj_get_y(roller_scrl);
a.end = new_y;
a.fp = (lv_anim_fp_t)lv_obj_set_y;
a.path = lv_anim_path_linear;
a.end_cb = NULL;
a.act_time = 0;
a.time = ext->ddlist.anim_time;
a.playback = 0;
a.playback_pause = 0;
a.repeat = 0;
a.repeat_pause = 0;
lv_anim_create(&a);
#endif
}
}
/**
* Focus on an object. It ensures that the object will be visible on the page.
* @param page pointer to a page object
* @param obj pointer to an object to focus (must be on the page)
* @param anim_time scroll animation time in milliseconds (0: no animation)
*/
void lv_page_focus(lv_obj_t * page, lv_obj_t * obj, uint16_t anim_time)
{
lv_page_ext_t * ext = lv_obj_get_ext_attr(page);
lv_style_t * style = lv_page_get_style(page, LV_PAGE_STYLE_BG);
lv_style_t * style_scrl = lv_page_get_style(page, LV_PAGE_STYLE_SCRL);
lv_coord_t obj_y = obj->coords.y1 - ext->scrl->coords.y1;
lv_coord_t obj_h = lv_obj_get_height(obj);
lv_coord_t scrlable_y = lv_obj_get_y(ext->scrl);
lv_coord_t page_h = lv_obj_get_height(page);
lv_coord_t top_err = -(scrlable_y + obj_y);
lv_coord_t bot_err = scrlable_y + obj_y + obj_h - page_h;
/*If obj is higher then the page focus where the "error" is smaller*/
/*Out of the page on the top*/
if((obj_h <= page_h && top_err > 0) ||
(obj_h > page_h && top_err < bot_err)) {
/*Calculate a new position and let some space above*/
scrlable_y = -(obj_y - style_scrl->body.padding.ver - style->body.padding.ver);
scrlable_y += style_scrl->body.padding.ver;
}
/*Out of the page on the bottom*/
else if((obj_h <= page_h && bot_err > 0) ||
(obj_h > page_h && top_err >= bot_err)) {
/*Calculate a new position and let some space below*/
scrlable_y = -obj_y;
scrlable_y += page_h - obj_h;
scrlable_y -= style_scrl->body.padding.ver;
} else {
/*Already in focus*/
return;
}
if(anim_time == 0) {
lv_obj_set_y(ext->scrl, scrlable_y);
}
else {
#if USE_LV_ANIMATION
lv_anim_t a;
a.act_time = 0;
a.start = lv_obj_get_y(ext->scrl);
a.end = scrlable_y;
a.time = anim_time;
a.end_cb = NULL;
a.playback = 0;
a.repeat = 0;
a.var = ext->scrl;
a.path = lv_anim_path_linear;
a.fp = (lv_anim_fp_t) lv_obj_set_y;
lv_anim_create(&a);
#endif
}
}
/**
* Set the position of list when it is closed to show the selected item
* @param ddlist pointer to a drop down list
*/
static void lv_ddlist_pos_current_option(lv_obj_t * ddlist)
{
lv_ddlist_ext_t * ext = lv_obj_get_ext_attr(ddlist);
lv_style_t * style = lv_obj_get_style(ddlist);
const lv_font_t * font = style->text.font;
lv_coord_t font_h = lv_font_get_height(font);
lv_style_t * label_style = lv_obj_get_style(ext->label);
lv_obj_t * scrl = lv_page_get_scrl(ddlist);
lv_coord_t h = lv_obj_get_height(ddlist);
lv_coord_t line_y1 = ext->sel_opt_id * (font_h + label_style->text.line_space) + ext->label->coords.y1 - scrl->coords.y1;
lv_obj_set_y(scrl, - line_y1 + (h - font_h) / 2);
}
/**
* Load the file list from the current path on the window
* @param app pointer to a Files application
*/
static void win_load_file_list(lv_app_inst_t * app)
{
my_app_data_t * app_data = app->app_data;
my_win_data_t * win_data = app->win_data;
/*Create a new list*/
win_create_list(app);
fs_res_t res = FS_RES_OK;
/*At empty path show the drivers */
lv_obj_t * liste;
if(app_data->path[0] == '\0') {
char drv[16];
char buf[2];
fs_get_letters(drv);
uint8_t i;
for(i = 0; drv[i] != '\0'; i++) {
buf[0] = drv[i];
buf[1] = '\0';
liste = lv_list_add(win_data->file_list, SYMBOL_DRIVE, buf, win_drv_action);
lv_obj_set_free_p(liste, app);
}
}
/*List the files/folders with fs interface*/
else {
liste = lv_list_add(win_data->file_list, SYMBOL_UP, "Up", win_up_action);
lv_obj_set_free_p(liste, app);
fs_readdir_t rd;
res = fs_readdir_init(&rd, app_data->path);
if(res != FS_RES_OK) {
lv_app_notice_add("Can not read the\npath in Files");
return;
}
/*At not first page add prev. page button */
if(app_data->file_cnt != 0) {
liste = lv_list_add(win_data->file_list, SYMBOL_LEFT, "Previous page", win_prev_action);
lv_obj_set_free_p(liste, app);
}
char fn[LV_APP_FILES_FN_MAX_LEN];
/*Read the files from the previous pages*/
uint16_t file_cnt = 0;
while(file_cnt <= app_data->file_cnt) {
res = fs_readdir(&rd, fn);
if(res != FS_RES_OK ){
lv_app_notice_add("Can not read\nthe path in Files");
return;
}
file_cnt ++;
}
/*Add list elements from the files and folders*/
while(res == FS_RES_OK && fn[0] != '\0') {
if(fn[0] == '/') { /*Add a folder*/
lv_obj_t * liste;
liste = lv_list_add(win_data->file_list, SYMBOL_FOLDER, &fn[1], win_folder_action);
lv_obj_set_free_p(liste, app);
app_data->file_cnt ++;
}
/*Add a file*/
else {
liste = lv_list_add(win_data->file_list, SYMBOL_FILE, fn, win_file_action);
lv_obj_set_free_p(liste, app);
app_data->file_cnt ++;
}
/*Get the next element*/
res = fs_readdir(&rd, fn);
/*Show only LV_APP_FSEL_MAX_FILE elements and add a Next page button*/
if(app_data->file_cnt != 0 && app_data->file_cnt % LV_APP_FILES_PAGE_SIZE == 0) {
liste = lv_list_add(win_data->file_list, SYMBOL_RIGHT, "Next page", win_next_action);
lv_obj_set_free_p(liste, app);
break;
}
}
/*Close the read directory*/
fs_readdir_close(&rd);
}
if(res != FS_RES_OK) {
lv_app_notice_add("Can not read\nthe path in Files");
}
/*Focus to the top of the list*/
lv_obj_set_y(lv_page_get_scrl(win_data->file_list), 0);
return;
}
