1135 lines
37 KiB
C
1135 lines
37 KiB
C
/**
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* @file lv_roller.c
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*
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*/
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/*********************
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* INCLUDES
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*********************/
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#include "lv_roller.h"
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#if LV_USE_ROLLER != 0
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#include "../lv_misc/lv_debug.h"
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#include "../lv_draw/lv_draw.h"
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#include "../lv_core/lv_group.h"
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#include "../lv_themes/lv_theme.h"
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/*********************
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* DEFINES
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*********************/
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#define LV_OBJX_NAME "lv_roller"
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#if LV_USE_ANIMATION == 0
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#undef LV_ROLLER_DEF_ANIM_TIME
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#define LV_ROLLER_DEF_ANIM_TIME 0 /*No animation*/
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#endif
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/**********************
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* TYPEDEFS
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**********************/
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/**********************
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* STATIC PROTOTYPES
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**********************/
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static lv_design_res_t lv_roller_design(lv_obj_t *roller, const lv_area_t *clip_area, lv_design_mode_t mode);
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static lv_design_res_t lv_roller_label_design(lv_obj_t *label, const lv_area_t *clip_area, lv_design_mode_t mode);
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static lv_res_t lv_roller_scrl_signal(lv_obj_t *roller_scrl, lv_signal_t sign, void *param);
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static lv_style_list_t *lv_roller_get_style(lv_obj_t *roller, uint8_t part);
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static lv_res_t lv_roller_signal(lv_obj_t *roller, lv_signal_t sign, void *param);
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static void refr_position(lv_obj_t *roller, lv_anim_enable_t animen);
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static void refr_height(lv_obj_t *roller);
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static void refr_width(lv_obj_t *roller);
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static lv_res_t release_handler(lv_obj_t *roller);
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static void inf_normalize(void *roller_scrl);
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static lv_obj_t *get_label(const lv_obj_t *roller);
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#if LV_USE_ANIMATION
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static void scroll_anim_ready_cb(lv_anim_t *a);
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#endif
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static void draw_bg(lv_obj_t *roller, const lv_area_t *clip_area);
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/**********************
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* STATIC VARIABLES
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**********************/
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static lv_signal_cb_t ancestor_signal;
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static lv_design_cb_t ancestor_label_design;
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static lv_signal_cb_t ancestor_scrl_signal;
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/**********************
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* MACROS
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**********************/
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/**********************
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* GLOBAL FUNCTIONS
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**********************/
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/**
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* Create a roller object
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* @param par pointer to an object, it will be the parent of the new roller
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* @param copy pointer to a roller object, if not NULL then the new object will be copied from it
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* @return pointer to the created roller
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*/
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lv_obj_t *lv_roller_create(lv_obj_t *par, const lv_obj_t *copy)
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{
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LV_LOG_TRACE("roller create started");
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/*Create the ancestor of roller*/
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lv_obj_t *roller = lv_page_create(par, copy);
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LV_ASSERT_MEM(roller);
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if (roller == NULL) {
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return NULL;
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}
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if (ancestor_scrl_signal == NULL) {
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ancestor_scrl_signal = lv_obj_get_signal_cb(lv_page_get_scrollable(roller));
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}
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if (ancestor_signal == NULL) {
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ancestor_signal = lv_obj_get_signal_cb(roller);
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}
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/*Allocate the roller type specific extended data*/
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lv_roller_ext_t *ext = lv_obj_allocate_ext_attr(roller, sizeof(lv_roller_ext_t));
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LV_ASSERT_MEM(ext);
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if (ext == NULL) {
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lv_obj_del(roller);
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return NULL;
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}
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ext->mode = LV_ROLLER_MODE_NORMAL;
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ext->option_cnt = 0;
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ext->sel_opt_id = 0;
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ext->sel_opt_id_ori = 0;
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ext->auto_fit = 1;
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lv_style_list_init(&ext->style_sel);
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/*The signal and design functions are not copied so set them here*/
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lv_obj_set_signal_cb(roller, lv_roller_signal);
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lv_obj_set_design_cb(roller, lv_roller_design);
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/*Init the new roller roller*/
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if (copy == NULL) {
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lv_obj_t *label = lv_label_create(roller, NULL);
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lv_label_set_align(label, LV_LABEL_ALIGN_CENTER);
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if (ancestor_label_design == NULL) {
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ancestor_label_design = lv_obj_get_design_cb(label);
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}
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lv_obj_set_design_cb(label, lv_roller_label_design);
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lv_obj_t *scrl = lv_page_get_scrollable(roller);
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lv_obj_set_drag(scrl, true);
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lv_page_set_scrollable_fit2(roller, LV_FIT_PARENT, LV_FIT_NONE); /*Height is specified directly*/
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lv_roller_set_anim_time(roller, LV_ROLLER_DEF_ANIM_TIME);
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lv_roller_set_options(roller, "Option 1\nOption 2\nOption 3\nOption 4\nOption 5", LV_ROLLER_MODE_NORMAL);
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lv_obj_set_signal_cb(scrl, lv_roller_scrl_signal);
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lv_obj_clean_style_list(roller, LV_PAGE_PART_SCROLLABLE); /*Use a transparent scrollable*/
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lv_theme_apply(roller, LV_THEME_ROLLER);
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refr_height(roller);
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lv_roller_set_visible_row_count(roller, 3);
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}
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/*Copy an existing roller*/
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else {
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lv_label_create(roller, get_label(copy));
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lv_roller_ext_t *copy_ext = lv_obj_get_ext_attr(copy);
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ext->mode = copy_ext->mode;
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ext->option_cnt = copy_ext->option_cnt;
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ext->sel_opt_id = copy_ext->sel_opt_id;
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ext->sel_opt_id_ori = copy_ext->sel_opt_id;
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ext->auto_fit = copy_ext->auto_fit;
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lv_obj_t *scrl = lv_page_get_scrollable(roller);
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lv_obj_set_signal_cb(scrl, lv_roller_scrl_signal);
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lv_style_list_copy(&ext->style_sel, ©_ext->style_sel);
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lv_obj_refresh_style(roller, LV_OBJ_PART_ALL, LV_STYLE_PROP_ALL);
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}
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LV_LOG_INFO("roller created");
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return roller;
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}
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/*=====================
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* Setter functions
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*====================*/
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/**
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* Set the options on a roller
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* @param roller pointer to roller object
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* @param options a string with '\n' separated options. E.g. "One\nTwo\nThree"
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* @param mode `LV_ROLLER_MODE_NORMAL` or `LV_ROLLER_MODE_INFINITE`
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*/
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void lv_roller_set_options(lv_obj_t *roller, const char *options, lv_roller_mode_t mode)
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{
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LV_ASSERT_OBJ(roller, LV_OBJX_NAME);
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LV_ASSERT_STR(options);
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lv_roller_ext_t *ext = lv_obj_get_ext_attr(roller);
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lv_obj_t *label = get_label(roller);
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ext->sel_opt_id = 0;
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ext->sel_opt_id_ori = 0;
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/*Count the '\n'-s to determine the number of options*/
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ext->option_cnt = 0;
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uint32_t cnt;
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for (cnt = 0; options[cnt] != '\0'; cnt++) {
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if (options[cnt] == '\n') {
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ext->option_cnt++;
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}
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}
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ext->option_cnt++; /*Last option has no `\n`*/
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if (mode == LV_ROLLER_MODE_NORMAL) {
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ext->mode = LV_ROLLER_MODE_NORMAL;
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lv_label_set_text(label, options);
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} else {
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ext->mode = LV_ROLLER_MODE_INFINITE;
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size_t opt_len = strlen(options) + 1; /*+1 to add '\n' after option lists*/
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char *opt_extra = _lv_mem_buf_get(opt_len * LV_ROLLER_INF_PAGES);
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uint8_t i;
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for (i = 0; i < LV_ROLLER_INF_PAGES; i++) {
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strcpy(&opt_extra[opt_len * i], options);
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opt_extra[opt_len * (i + 1) - 1] = '\n';
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}
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opt_extra[opt_len * LV_ROLLER_INF_PAGES - 1] = '\0';
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lv_label_set_text(label, opt_extra);
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_lv_mem_buf_release(opt_extra);
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ext->sel_opt_id = ((LV_ROLLER_INF_PAGES / 2) + 0) * ext->option_cnt;
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ext->option_cnt = ext->option_cnt * LV_ROLLER_INF_PAGES;
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}
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ext->sel_opt_id_ori = ext->sel_opt_id;
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refr_height(roller);
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refr_width(roller);
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}
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/**
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* Set the align of the roller's options (left or center)
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* @param roller - pointer to a roller object
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* @param align - one of lv_label_align_t values (left, right, center)
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*/
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void lv_roller_set_align(lv_obj_t *roller, lv_label_align_t align)
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{
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LV_ASSERT_OBJ(roller, LV_OBJX_NAME);
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lv_obj_t *label = get_label(roller);
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if (label == NULL) {
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return; /*Probably the roller is being deleted if the label is NULL.*/
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}
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lv_label_set_align(label, align);
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refr_width(roller); /*To set the correct label position*/
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}
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/**
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* Set the selected option
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* @param roller pointer to a roller object
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* @param sel_opt id of the selected option (0 ... number of option - 1);
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* @param anim_en LV_ANIM_ON: set with animation; LV_ANOM_OFF set immediately
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*/
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void lv_roller_set_selected(lv_obj_t *roller, uint16_t sel_opt, lv_anim_enable_t anim)
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{
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LV_ASSERT_OBJ(roller, LV_OBJX_NAME);
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#if LV_USE_ANIMATION == 0
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anim = LV_ANIM_OFF;
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#endif
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/* Set the value even if it's the same as the current value because
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* if moving to the next option with an animation which was just deleted in the PRESS signal
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* nothing will continue the animation. */
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lv_roller_ext_t *ext = lv_obj_get_ext_attr(roller);
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/*In infinite mode interpret the new ID relative to the currently visible "page"*/
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if (ext->mode == LV_ROLLER_MODE_INFINITE) {
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int32_t sel_opt_signed = sel_opt;
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uint16_t page = ext->sel_opt_id / LV_ROLLER_INF_PAGES;
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/* `sel_opt` should be less than the number of options set by the user.
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* If it's more then probably it's a reference from not the first page
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* so normalize `sel_opt` */
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if (page != 0) {
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sel_opt_signed -= page * LV_ROLLER_INF_PAGES;
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}
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sel_opt = page * LV_ROLLER_INF_PAGES + sel_opt_signed;
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}
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ext->sel_opt_id = sel_opt < ext->option_cnt ? sel_opt : ext->option_cnt - 1;
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ext->sel_opt_id_ori = ext->sel_opt_id;
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refr_position(roller, anim);
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}
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/**
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* Set the height to show the given number of rows (options)
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* @param roller pointer to a roller object
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* @param row_cnt number of desired visible rows
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*/
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void lv_roller_set_visible_row_count(lv_obj_t *roller, uint8_t row_cnt)
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{
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LV_ASSERT_OBJ(roller, LV_OBJX_NAME);
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const lv_font_t *font = lv_obj_get_style_text_font(roller, LV_ROLLER_PART_BG);
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lv_style_int_t line_space = lv_obj_get_style_text_line_space(roller, LV_ROLLER_PART_BG);
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lv_obj_set_height(roller, (lv_font_get_line_height(font) + line_space) * row_cnt);
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refr_height(roller);
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refr_position(roller, LV_ANIM_OFF);
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}
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/**
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* Allow automatically setting the width of roller according to it's content.
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* @param roller pointer to a roller object
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* @param auto_fit true: enable auto fit
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*/
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void lv_roller_set_auto_fit(lv_obj_t *roller, bool auto_fit)
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{
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LV_ASSERT_OBJ(roller, LV_OBJX_NAME);
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lv_roller_ext_t *ext = lv_obj_get_ext_attr(roller);
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ext->auto_fit = auto_fit;
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refr_width(roller);
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}
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/*=====================
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* Getter functions
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*====================*/
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/**
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* Get the id of the selected option
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* @param roller pointer to a roller object
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* @return id of the selected option (0 ... number of option - 1);
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*/
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uint16_t lv_roller_get_selected(const lv_obj_t *roller)
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{
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LV_ASSERT_OBJ(roller, LV_OBJX_NAME);
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lv_roller_ext_t *ext = lv_obj_get_ext_attr(roller);
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if (ext->mode == LV_ROLLER_MODE_INFINITE) {
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uint16_t real_id_cnt = ext->option_cnt / LV_ROLLER_INF_PAGES;
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return ext->sel_opt_id % real_id_cnt;
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} else {
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return ext->sel_opt_id;
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}
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}
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/**
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* Get the current selected option as a string
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* @param ddlist pointer to ddlist object
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* @param buf pointer to an array to store the string
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* @param buf_size size of `buf` in bytes. 0: to ignore it.
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*/
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void lv_roller_get_selected_str(const lv_obj_t *roller, char *buf, uint32_t buf_size)
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{
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LV_ASSERT_OBJ(roller, LV_OBJX_NAME);
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lv_roller_ext_t *ext = lv_obj_get_ext_attr(roller);
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lv_obj_t *label = get_label(roller);
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uint32_t i;
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uint16_t line = 0;
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const char *opt_txt = lv_label_get_text(label);
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size_t txt_len = strlen(opt_txt);
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for (i = 0; i < txt_len && line != ext->sel_opt_id; i++) {
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if (opt_txt[i] == '\n') {
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line++;
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}
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}
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uint32_t c;
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for (c = 0; i < txt_len && opt_txt[i] != '\n'; c++, i++) {
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if (buf_size && c >= buf_size - 1) {
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LV_LOG_WARN("lv_dropdown_get_selected_str: the buffer was too small")
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break;
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}
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buf[c] = opt_txt[i];
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}
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buf[c] = '\0';
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}
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/**
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* Get the total number of options
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* @param roller pointer to a roller object
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* @return the total number of options
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*/
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uint16_t lv_roller_get_option_cnt(const lv_obj_t *roller)
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{
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LV_ASSERT_OBJ(roller, LV_OBJX_NAME);
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lv_roller_ext_t *ext = lv_obj_get_ext_attr(roller);
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if (ext->mode == LV_ROLLER_MODE_INFINITE) {
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return ext->option_cnt / LV_ROLLER_INF_PAGES;
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} else {
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return ext->option_cnt;
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}
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}
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/**
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* Get the align attribute. Default alignment after _create is LV_LABEL_ALIGN_CENTER
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* @param roller pointer to a roller object
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* @return LV_LABEL_ALIGN_LEFT, LV_LABEL_ALIGN_RIGHT or LV_LABEL_ALIGN_CENTER
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*/
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lv_label_align_t lv_roller_get_align(const lv_obj_t *roller)
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{
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LV_ASSERT_OBJ(roller, LV_OBJX_NAME);
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return lv_label_get_align(get_label(roller));
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}
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/**
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* Get whether the auto fit option is enabled or not.
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* @param roller pointer to a roller object
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* @return true: auto fit is enabled
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*/
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bool lv_roller_get_auto_fit(lv_obj_t *roller)
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{
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LV_ASSERT_OBJ(roller, LV_OBJX_NAME);
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lv_roller_ext_t *ext = lv_obj_get_ext_attr(roller);
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return ext->auto_fit ? true : false;
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}
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/**
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* Get the options of a roller
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* @param roller pointer to roller object
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* @return the options separated by '\n'-s (E.g. "Option1\nOption2\nOption3")
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*/
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const char *lv_roller_get_options(const lv_obj_t *roller)
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{
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LV_ASSERT_OBJ(roller, LV_OBJX_NAME);
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return lv_label_get_text(get_label(roller));
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}
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/**********************
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* STATIC FUNCTIONS
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**********************/
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/**
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* Handle the drawing related tasks of the rollers
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* @param roller pointer to an object
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* @param clip_area the object will be drawn only in this area
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* @param mode LV_DESIGN_COVER_CHK: only check if the object fully covers the 'mask_p' area
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* (return 'true' if yes)
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* LV_DESIGN_DRAW: draw the object (always return 'true')
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* LV_DESIGN_DRAW_POST: drawing after all children are drawn
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* @param return an element of `lv_design_res_t`
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*/
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static lv_design_res_t lv_roller_design(lv_obj_t *roller, const lv_area_t *clip_area, lv_design_mode_t mode)
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{
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if (mode == LV_DESIGN_COVER_CHK) {
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return LV_DESIGN_RES_NOT_COVER;
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}
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/*Draw the object*/
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else if (mode == LV_DESIGN_DRAW_MAIN) {
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draw_bg(roller, clip_area);
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const lv_font_t *font = lv_obj_get_style_text_font(roller, LV_ROLLER_PART_BG);
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lv_style_int_t line_space = lv_obj_get_style_text_line_space(roller, LV_ROLLER_PART_BG);
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lv_coord_t font_h = lv_font_get_line_height(font);
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lv_area_t rect_area;
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rect_area.y1 = roller->coords.y1 + lv_obj_get_height(roller) / 2 - font_h / 2 - line_space / 2;
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if ((font_h & 0x1) && (line_space & 0x1)) {
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rect_area.y1--; /*Compensate the two rounding error*/
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}
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rect_area.y2 = rect_area.y1 + font_h + line_space - 1;
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lv_area_t roller_coords;
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lv_obj_get_coords(roller, &roller_coords);
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lv_obj_get_inner_coords(roller, &roller_coords);
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rect_area.x1 = roller_coords.x1;
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rect_area.x2 = roller_coords.x2;
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|
|
lv_draw_rect_dsc_t sel_dsc;
|
|
lv_draw_rect_dsc_init(&sel_dsc);
|
|
lv_obj_init_draw_rect_dsc(roller, LV_ROLLER_PART_SELECTED, &sel_dsc);
|
|
lv_draw_rect(&rect_area, clip_area, &sel_dsc);
|
|
}
|
|
/*Post draw when the children are drawn*/
|
|
else if (mode == LV_DESIGN_DRAW_POST) {
|
|
lv_draw_label_dsc_t label_dsc;
|
|
lv_draw_label_dsc_init(&label_dsc);
|
|
lv_obj_init_draw_label_dsc(roller, LV_ROLLER_PART_SELECTED, &label_dsc);
|
|
|
|
lv_coord_t bg_font_h = lv_font_get_line_height(lv_obj_get_style_text_font(roller, LV_ROLLER_PART_BG));
|
|
|
|
/*Redraw the text on the selected area*/
|
|
lv_area_t rect_area;
|
|
rect_area.y1 = roller->coords.y1 + lv_obj_get_height(roller) / 2 - bg_font_h / 2 - label_dsc.line_space / 2;
|
|
|
|
if ((bg_font_h & 0x1) && (label_dsc.line_space & 0x1)) {
|
|
rect_area.y1--; /*Compensate the two rounding error*/
|
|
}
|
|
|
|
rect_area.y2 = rect_area.y1 + bg_font_h + label_dsc.line_space - 1;
|
|
rect_area.x1 = roller->coords.x1;
|
|
rect_area.x2 = roller->coords.x2;
|
|
lv_area_t mask_sel;
|
|
bool area_ok;
|
|
area_ok = _lv_area_intersect(&mask_sel, clip_area, &rect_area);
|
|
|
|
if (area_ok) {
|
|
lv_obj_t *label = get_label(roller);
|
|
lv_label_align_t label_align = lv_roller_get_align(roller);
|
|
|
|
if (LV_LABEL_ALIGN_CENTER == label_align) {
|
|
label_dsc.flag |= LV_TXT_FLAG_CENTER;
|
|
} else if (LV_LABEL_ALIGN_RIGHT == label_align) {
|
|
label_dsc.flag |= LV_TXT_FLAG_RIGHT;
|
|
}
|
|
|
|
/*Get the size of the "selected text"*/
|
|
lv_point_t res_p;
|
|
_lv_txt_get_size(&res_p, lv_label_get_text(label), label_dsc.font, label_dsc.letter_space, label_dsc.line_space,
|
|
lv_obj_get_width(roller), LV_TXT_FLAG_EXPAND);
|
|
|
|
/*Move the selected label proportionally with the background label*/
|
|
lv_coord_t roller_h = lv_obj_get_height(roller);
|
|
int32_t label_y_prop = label->coords.y1 - (roller_h / 2 +
|
|
roller->coords.y1); /*label offset from the middle line of the roller*/
|
|
label_y_prop = (label_y_prop << 14) / lv_obj_get_height(
|
|
label); /*Proportional position from the middle line (upscaled)*/
|
|
|
|
/*Apply a correction with different line heights*/
|
|
const lv_font_t *normal_label_font = lv_obj_get_style_text_font(roller, LV_ROLLER_PART_BG);
|
|
lv_coord_t corr = (label_dsc.font->line_height - normal_label_font->line_height) / 2;
|
|
|
|
/*Apply the proportional position to the selected text*/
|
|
res_p.y -= corr;
|
|
int32_t label_sel_y = roller_h / 2 + roller->coords.y1;
|
|
label_sel_y += (label_y_prop * res_p.y) >> 14;
|
|
label_sel_y -= corr;
|
|
|
|
/*Draw the selected text*/
|
|
lv_area_t label_sel_area;
|
|
label_sel_area.x1 = label->coords.x1;
|
|
label_sel_area.y1 = label_sel_y;
|
|
label_sel_area.x2 = label->coords.x2;
|
|
label_sel_area.y2 = label_sel_area.y1 + res_p.y;
|
|
|
|
label_dsc.flag |= LV_TXT_FLAG_EXPAND;
|
|
lv_draw_label(&label_sel_area, &mask_sel, &label_dsc, lv_label_get_text(label), NULL);
|
|
}
|
|
}
|
|
|
|
return LV_DESIGN_RES_OK;
|
|
}
|
|
|
|
/**
|
|
* Handle the drawing related tasks of the roller's label
|
|
* @param roller pointer to an object
|
|
* @param clip_area the object will be drawn only in this area
|
|
* @param mode LV_DESIGN_COVER_CHK: only check if the object fully covers the 'mask_p' area
|
|
* (return 'true' if yes)
|
|
* LV_DESIGN_DRAW: draw the object (always return 'true')
|
|
* LV_DESIGN_DRAW_POST: drawing after all children are drawn
|
|
* @param return an element of `lv_design_res_t`
|
|
*/
|
|
static lv_design_res_t lv_roller_label_design(lv_obj_t *label, const lv_area_t *clip_area, lv_design_mode_t mode)
|
|
{
|
|
if (mode == LV_DESIGN_COVER_CHK) {
|
|
return ancestor_label_design(label, clip_area, mode);
|
|
}
|
|
/*Draw the object*/
|
|
else if (mode == LV_DESIGN_DRAW_MAIN) {
|
|
/* Split the drawing of the label into an upper (above the selected area)
|
|
* and a lower (below the selected area)*/
|
|
lv_obj_t *roller = lv_obj_get_parent(lv_obj_get_parent(label));
|
|
const lv_font_t *font = lv_obj_get_style_text_font(roller, LV_ROLLER_PART_BG);
|
|
lv_style_int_t line_space = lv_obj_get_style_text_line_space(roller, LV_ROLLER_PART_BG);
|
|
lv_coord_t font_h = lv_font_get_line_height(font);
|
|
|
|
lv_area_t rect_area;
|
|
rect_area.y1 = roller->coords.y1 + lv_obj_get_height(roller) / 2 - font_h / 2 - line_space / 2;
|
|
|
|
if ((font_h & 0x1) && (line_space & 0x1)) {
|
|
rect_area.y1--; /*Compensate the two rounding error*/
|
|
}
|
|
|
|
rect_area.y2 = rect_area.y1 + font_h + line_space - 1;
|
|
lv_area_t roller_coords;
|
|
lv_obj_get_coords(roller, &roller_coords);
|
|
lv_obj_get_inner_coords(roller, &roller_coords);
|
|
|
|
rect_area.x1 = roller_coords.x1;
|
|
rect_area.x2 = roller_coords.x2;
|
|
|
|
lv_area_t clip2;
|
|
clip2.x1 = label->coords.x1;
|
|
clip2.y1 = label->coords.y1;
|
|
clip2.x2 = label->coords.x2;
|
|
clip2.y2 = rect_area.y1;
|
|
|
|
if (_lv_area_intersect(&clip2, clip_area, &clip2)) {
|
|
ancestor_label_design(label, &clip2, mode);
|
|
}
|
|
|
|
clip2.x1 = label->coords.x1;
|
|
clip2.y1 = rect_area.y2;
|
|
clip2.x2 = label->coords.x2;
|
|
clip2.y2 = label->coords.y2;
|
|
|
|
if (_lv_area_intersect(&clip2, clip_area, &clip2)) {
|
|
ancestor_label_design(label, &clip2, mode);
|
|
}
|
|
}
|
|
|
|
return LV_DESIGN_RES_OK;
|
|
}
|
|
|
|
/**
|
|
* Signal function of the roller
|
|
* @param roller pointer to a roller 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_roller_signal(lv_obj_t *roller, lv_signal_t sign, void *param)
|
|
{
|
|
lv_res_t res = LV_RES_OK;
|
|
|
|
if (sign == LV_SIGNAL_GET_STYLE) {
|
|
lv_get_style_info_t *info = param;
|
|
info->result = lv_roller_get_style(roller, info->part);
|
|
|
|
if (info->result != NULL) {
|
|
return LV_RES_OK;
|
|
} else {
|
|
return ancestor_signal(roller, sign, param);
|
|
}
|
|
}
|
|
|
|
/* Include the ancient signal function */
|
|
if (sign != LV_SIGNAL_CONTROL) /*Don't let the page to scroll on keys*/
|
|
{
|
|
res = ancestor_signal(roller, sign, param);
|
|
|
|
if (res != LV_RES_OK) {
|
|
return res;
|
|
}
|
|
}
|
|
|
|
if (sign == LV_SIGNAL_GET_TYPE) {
|
|
return lv_obj_handle_get_type_signal(param, LV_OBJX_NAME);
|
|
}
|
|
|
|
lv_roller_ext_t *ext = lv_obj_get_ext_attr(roller);
|
|
LV_UNUSED(ext);
|
|
|
|
if (sign == LV_SIGNAL_STYLE_CHG) {
|
|
lv_obj_t *label = get_label(roller);
|
|
|
|
/*Be sure the label's style is updated before processing the roller*/
|
|
if (label) {
|
|
lv_signal_send(label, LV_SIGNAL_STYLE_CHG, NULL);
|
|
}
|
|
|
|
refr_height(roller);
|
|
refr_width(roller);
|
|
refr_position(roller, false);
|
|
} else if (sign == LV_SIGNAL_COORD_CHG) {
|
|
if (lv_obj_get_width(roller) != lv_area_get_width(param) ||
|
|
lv_obj_get_height(roller) != lv_area_get_height(param)) {
|
|
#if LV_USE_ANIMATION
|
|
lv_anim_del(lv_page_get_scrollable(roller), (lv_anim_exec_xcb_t)lv_obj_set_y);
|
|
#endif
|
|
refr_position(roller, false);
|
|
refr_width(roller);
|
|
}
|
|
} else if (sign == LV_SIGNAL_RELEASED) {
|
|
release_handler(roller);
|
|
} else if (sign == LV_SIGNAL_FOCUS) {
|
|
#if LV_USE_GROUP
|
|
lv_group_t *g = lv_obj_get_group(roller);
|
|
bool editing = lv_group_get_editing(g);
|
|
lv_indev_type_t indev_type = lv_indev_get_type(lv_indev_get_act());
|
|
|
|
/*Encoders need special handling*/
|
|
if (indev_type == LV_INDEV_TYPE_ENCODER) {
|
|
/*In navigate mode revert the original value*/
|
|
if (!editing) {
|
|
if (ext->sel_opt_id != ext->sel_opt_id_ori) {
|
|
ext->sel_opt_id = ext->sel_opt_id_ori;
|
|
refr_position(roller, true);
|
|
}
|
|
}
|
|
/*Save the current state when entered to edit mode*/
|
|
else {
|
|
ext->sel_opt_id_ori = ext->sel_opt_id;
|
|
}
|
|
} else {
|
|
ext->sel_opt_id_ori = ext->sel_opt_id; /*Save the current value. Used to revert this state if
|
|
ENTER won't be pressed*/
|
|
}
|
|
|
|
#endif
|
|
} else if (sign == LV_SIGNAL_DEFOCUS) {
|
|
#if LV_USE_GROUP
|
|
|
|
/*Revert the original state*/
|
|
if (ext->sel_opt_id != ext->sel_opt_id_ori) {
|
|
ext->sel_opt_id = ext->sel_opt_id_ori;
|
|
refr_position(roller, true);
|
|
}
|
|
|
|
#endif
|
|
} else if (sign == LV_SIGNAL_CONTROL) {
|
|
#if LV_USE_GROUP
|
|
char c = *((char *)param);
|
|
|
|
if (c == LV_KEY_RIGHT || c == LV_KEY_DOWN) {
|
|
if (ext->sel_opt_id + 1 < ext->option_cnt) {
|
|
uint16_t ori_id = ext->sel_opt_id_ori; /*lv_roller_set_selected will overwrite this*/
|
|
lv_roller_set_selected(roller, ext->sel_opt_id + 1, true);
|
|
ext->sel_opt_id_ori = ori_id;
|
|
}
|
|
} else if (c == LV_KEY_LEFT || c == LV_KEY_UP) {
|
|
if (ext->sel_opt_id > 0) {
|
|
uint16_t ori_id = ext->sel_opt_id_ori; /*lv_roller_set_selected will overwrite this*/
|
|
|
|
lv_roller_set_selected(roller, ext->sel_opt_id - 1, true);
|
|
ext->sel_opt_id_ori = ori_id;
|
|
}
|
|
}
|
|
|
|
#endif
|
|
} else if (sign == LV_SIGNAL_CLEANUP) {
|
|
lv_obj_clean_style_list(roller, LV_ROLLER_PART_SELECTED);
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
/**
|
|
* Get the style descriptor of a part of the object
|
|
* @param page pointer the object
|
|
* @param part the part from `lv_roller_part_t`. (LV_ROLLER_PART_...)
|
|
* @return pointer to the style descriptor of the specified part
|
|
*/
|
|
static lv_style_list_t *lv_roller_get_style(lv_obj_t *roller, uint8_t part)
|
|
{
|
|
LV_ASSERT_OBJ(roller, LV_OBJX_NAME);
|
|
|
|
lv_roller_ext_t *ext = lv_obj_get_ext_attr(roller);
|
|
lv_style_list_t *style_dsc_p;
|
|
|
|
switch (part) {
|
|
case LV_ROLLER_PART_BG:
|
|
style_dsc_p = &roller->style_list;
|
|
break;
|
|
|
|
case LV_ROLLER_PART_SELECTED:
|
|
style_dsc_p = &ext->style_sel;
|
|
break;
|
|
|
|
default:
|
|
style_dsc_p = NULL;
|
|
}
|
|
|
|
return style_dsc_p;
|
|
}
|
|
|
|
/**
|
|
* Signal function of the scrollable part of the roller.
|
|
* @param roller_scrl pointer to the scrollable part of roller (page)
|
|
* @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_roller_scrl_signal(lv_obj_t *roller_scrl, lv_signal_t sign, void *param)
|
|
{
|
|
lv_res_t res;
|
|
|
|
/* Include the ancient signal function */
|
|
res = ancestor_scrl_signal(roller_scrl, sign, param);
|
|
|
|
if (res != LV_RES_OK) {
|
|
return res;
|
|
}
|
|
|
|
if (sign == LV_SIGNAL_GET_TYPE) {
|
|
return lv_obj_handle_get_type_signal(param, LV_OBJX_NAME);
|
|
}
|
|
|
|
lv_obj_t *roller = lv_obj_get_parent(roller_scrl);
|
|
|
|
/*On delete the ddlist signal deletes the label so nothing left to do here*/
|
|
lv_obj_t *label = get_label(roller);
|
|
|
|
if (label == NULL) {
|
|
return LV_RES_INV;
|
|
}
|
|
|
|
int32_t id = -1;
|
|
lv_roller_ext_t *ext = lv_obj_get_ext_attr(roller);
|
|
|
|
const lv_font_t *font = lv_obj_get_style_text_font(roller, LV_ROLLER_PART_BG);
|
|
lv_style_int_t line_space = lv_obj_get_style_text_line_space(roller, LV_ROLLER_PART_BG);
|
|
lv_coord_t font_h = lv_font_get_line_height(font);
|
|
|
|
if (sign == LV_SIGNAL_DRAG_END) {
|
|
/*If dragged then align the list to have an element in the middle*/
|
|
lv_coord_t label_y1 = label->coords.y1 - roller->coords.y1;
|
|
lv_coord_t label_unit = font_h + line_space;
|
|
lv_coord_t mid = (roller->coords.y2 - roller->coords.y1) / 2;
|
|
|
|
id = (mid - label_y1 + line_space / 2) / label_unit;
|
|
|
|
if (id < 0) {
|
|
id = 0;
|
|
}
|
|
|
|
if (id >= ext->option_cnt) {
|
|
id = ext->option_cnt - 1;
|
|
}
|
|
|
|
ext->sel_opt_id = id;
|
|
ext->sel_opt_id_ori = id;
|
|
res = lv_event_send(roller, LV_EVENT_VALUE_CHANGED, &id);
|
|
|
|
if (res != LV_RES_OK) {
|
|
return res;
|
|
}
|
|
}
|
|
/*If picked an option by clicking then set it*/
|
|
else if (sign == LV_SIGNAL_RELEASED) {
|
|
release_handler(roller);
|
|
} else if (sign == LV_SIGNAL_PRESSED) {
|
|
#if LV_USE_ANIMATION
|
|
lv_anim_del(roller_scrl, (lv_anim_exec_xcb_t)lv_obj_set_y);
|
|
#endif
|
|
} else if (sign == LV_SIGNAL_PARENT_SIZE_CHG) {
|
|
#if LV_USE_ANIMATION
|
|
lv_anim_del(lv_page_get_scrollable(roller), (lv_anim_exec_xcb_t)lv_obj_set_y);
|
|
#endif
|
|
refr_position(roller, false);
|
|
refr_width(roller);
|
|
}
|
|
|
|
/*Position the scrollable according to the new selected option*/
|
|
if (id != -1) {
|
|
refr_position(roller, LV_ANIM_ON);
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
/**
|
|
* Draw a rectangle which has gradient on its top and bottom
|
|
* @param roller pointer to a roller object
|
|
* @param clip_area pointer to the current mask (from the design function)
|
|
*/
|
|
static void draw_bg(lv_obj_t *roller, const lv_area_t *clip_area)
|
|
{
|
|
lv_draw_rect_dsc_t bg_dsc;
|
|
lv_draw_rect_dsc_init(&bg_dsc);
|
|
lv_obj_init_draw_rect_dsc(roller, LV_ROLLER_PART_BG, &bg_dsc);
|
|
|
|
/*With non-vertical gradient simply draw the background*/
|
|
if (bg_dsc.bg_grad_dir == LV_GRAD_DIR_NONE) {
|
|
lv_draw_rect(&roller->coords, clip_area, &bg_dsc);
|
|
return;
|
|
}
|
|
|
|
/*With vertical gradient mirror it*/
|
|
|
|
lv_area_t half_mask;
|
|
lv_coord_t h = lv_obj_get_height(roller);
|
|
bool union_ok;
|
|
|
|
lv_area_copy(&half_mask, &roller->coords);
|
|
half_mask.x1 -= roller->ext_draw_pad; /*Add ext size too (e.g. because of shadow draw) */
|
|
half_mask.x2 += roller->ext_draw_pad;
|
|
half_mask.y1 -= roller->ext_draw_pad;
|
|
half_mask.y2 = roller->coords.y1 + h / 2;
|
|
|
|
union_ok = _lv_area_intersect(&half_mask, &half_mask, clip_area);
|
|
bg_dsc.bg_main_color_stop = bg_dsc.bg_main_color_stop / 2;
|
|
bg_dsc.bg_grad_color_stop = 128 - (255 - bg_dsc.bg_grad_color_stop) / 2;
|
|
|
|
if (union_ok) {
|
|
lv_draw_rect(&roller->coords, &half_mask, &bg_dsc);
|
|
}
|
|
|
|
lv_area_copy(&half_mask, &roller->coords);
|
|
half_mask.x1 -= roller->ext_draw_pad; /*Revert ext. size adding*/
|
|
half_mask.x2 += roller->ext_draw_pad;
|
|
half_mask.y1 = roller->coords.y1 + h / 2;
|
|
half_mask.y2 += roller->ext_draw_pad;
|
|
|
|
union_ok = _lv_area_intersect(&half_mask, &half_mask, clip_area);
|
|
|
|
if (union_ok) {
|
|
lv_color_t c = bg_dsc.bg_color;
|
|
bg_dsc.bg_color = bg_dsc.bg_grad_color;
|
|
bg_dsc.bg_grad_color = c;
|
|
|
|
bg_dsc.bg_main_color_stop += 127;
|
|
bg_dsc.bg_grad_color_stop += 127;
|
|
lv_draw_rect(&roller->coords, &half_mask, &bg_dsc);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 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 LV_ANIM_ON: refresh with animation; LV_ANOM_OFF: without animation
|
|
*/
|
|
static void refr_position(lv_obj_t *roller, lv_anim_enable_t anim_en)
|
|
{
|
|
#if LV_USE_ANIMATION == 0
|
|
anim_en = LV_ANIM_OFF;
|
|
#endif
|
|
|
|
lv_obj_t *roller_scrl = lv_page_get_scrollable(roller);
|
|
lv_roller_ext_t *ext = lv_obj_get_ext_attr(roller);
|
|
const lv_font_t *font = lv_obj_get_style_text_font(roller, LV_ROLLER_PART_BG);
|
|
lv_style_int_t line_space = lv_obj_get_style_text_line_space(roller, LV_ROLLER_PART_BG);
|
|
lv_coord_t font_h = lv_font_get_line_height(font);
|
|
lv_coord_t h = lv_obj_get_height(roller);
|
|
uint16_t anim_time = lv_roller_get_anim_time(roller);
|
|
|
|
/* Normally the animation's `end_cb` sets correct position of the roller if infinite.
|
|
* But without animations do it manually*/
|
|
if (anim_en == LV_ANIM_OFF || anim_time == 0) {
|
|
inf_normalize(roller_scrl);
|
|
}
|
|
|
|
lv_obj_t *label = get_label(roller);
|
|
|
|
int32_t id = ext->sel_opt_id;
|
|
lv_coord_t line_y1 = id * (font_h + line_space) + label->coords.y1 - roller_scrl->coords.y1;
|
|
lv_coord_t new_y = -line_y1 + (h - font_h) / 2;
|
|
|
|
if (anim_en == LV_ANIM_OFF || anim_time == 0) {
|
|
#if LV_USE_ANIMATION
|
|
lv_anim_del(roller_scrl, (lv_anim_exec_xcb_t)lv_obj_set_y);
|
|
#endif
|
|
lv_obj_set_y(roller_scrl, new_y);
|
|
} else {
|
|
#if LV_USE_ANIMATION
|
|
lv_anim_t a;
|
|
lv_anim_init(&a);
|
|
lv_anim_set_var(&a, roller_scrl);
|
|
lv_anim_set_exec_cb(&a, (lv_anim_exec_xcb_t)lv_obj_set_y);
|
|
lv_anim_set_values(&a, lv_obj_get_y(roller_scrl), new_y);
|
|
lv_anim_set_time(&a, anim_time);
|
|
lv_anim_set_ready_cb(&a, scroll_anim_ready_cb);
|
|
lv_anim_start(&a);
|
|
#endif
|
|
}
|
|
}
|
|
|
|
static lv_res_t release_handler(lv_obj_t *roller)
|
|
{
|
|
/*If there was dragging `DRAG_END` signal will refresh the position and update the selected option*/
|
|
if (lv_indev_is_dragging(lv_indev_get_act())) {
|
|
return LV_RES_OK;
|
|
}
|
|
|
|
lv_roller_ext_t *ext = lv_obj_get_ext_attr(roller);
|
|
|
|
lv_indev_t *indev = lv_indev_get_act();
|
|
#if LV_USE_GROUP
|
|
/*Leave edit mode once a new option is selected*/
|
|
lv_indev_type_t indev_type = lv_indev_get_type(indev);
|
|
|
|
if (indev_type == LV_INDEV_TYPE_ENCODER || indev_type == LV_INDEV_TYPE_KEYPAD) {
|
|
ext->sel_opt_id_ori = ext->sel_opt_id;
|
|
|
|
if (indev_type == LV_INDEV_TYPE_ENCODER) {
|
|
lv_group_t *g = lv_obj_get_group(roller);
|
|
|
|
if (lv_group_get_editing(g)) {
|
|
lv_group_set_editing(g, false);
|
|
}
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|
|
lv_obj_t *label = get_label(roller);
|
|
|
|
if (label == NULL) {
|
|
return LV_RES_OK;
|
|
}
|
|
|
|
if (lv_indev_get_type(indev) == LV_INDEV_TYPE_POINTER || lv_indev_get_type(indev) == LV_INDEV_TYPE_BUTTON) {
|
|
/*Search the clicked option (For KEYPAD and ENCODER the new value should be already set)*/
|
|
uint16_t new_opt = 0;
|
|
lv_point_t p;
|
|
lv_indev_get_point(indev, &p);
|
|
p.y -= label->coords.y1;
|
|
p.x -= label->coords.x1;
|
|
uint32_t letter_i;
|
|
letter_i = lv_label_get_letter_on(label, &p);
|
|
|
|
const char *txt = lv_label_get_text(label);
|
|
uint32_t i = 0;
|
|
uint32_t i_prev = 0;
|
|
|
|
uint32_t letter_cnt = 0;
|
|
|
|
for (letter_cnt = 0; letter_cnt < letter_i; letter_cnt++) {
|
|
uint32_t letter = _lv_txt_encoded_next(txt, &i);
|
|
|
|
/*Count he lines to reach the clicked letter. But ignore the last '\n' because it
|
|
* still belongs to the clicked line*/
|
|
if (letter == '\n' && i_prev != letter_i) {
|
|
new_opt++;
|
|
}
|
|
|
|
i_prev = i;
|
|
}
|
|
|
|
lv_roller_set_selected(roller, new_opt, LV_ANIM_ON);
|
|
}
|
|
|
|
uint32_t id = ext->sel_opt_id; /*Just to use uint32_t in event data*/
|
|
lv_res_t res = lv_event_send(roller, LV_EVENT_VALUE_CHANGED, &id);
|
|
return res;
|
|
}
|
|
|
|
static void refr_width(lv_obj_t *roller)
|
|
{
|
|
lv_obj_t *label = get_label(roller);
|
|
|
|
if (label == NULL) {
|
|
return;
|
|
}
|
|
|
|
switch (lv_label_get_align(label)) {
|
|
case LV_LABEL_ALIGN_LEFT:
|
|
lv_obj_align(label, NULL, LV_ALIGN_IN_LEFT_MID, 0, 0);
|
|
break;
|
|
|
|
case LV_LABEL_ALIGN_CENTER:
|
|
lv_obj_align(label, NULL, LV_ALIGN_CENTER, 0, 0);
|
|
break;
|
|
|
|
case LV_LABEL_ALIGN_RIGHT:
|
|
lv_obj_align(label, NULL, LV_ALIGN_IN_RIGHT_MID, 0, 0);
|
|
break;
|
|
}
|
|
|
|
if (lv_roller_get_auto_fit(roller) == false) {
|
|
return;
|
|
}
|
|
|
|
lv_coord_t label_w = lv_obj_get_width(label);
|
|
|
|
lv_style_int_t left = lv_obj_get_style_pad_left(roller, LV_ROLLER_PART_BG);
|
|
lv_style_int_t right = lv_obj_get_style_pad_right(roller, LV_ROLLER_PART_BG);
|
|
|
|
const lv_font_t *base_font = lv_obj_get_style_text_font(roller, LV_ROLLER_PART_BG);
|
|
const lv_font_t *sel_font = lv_obj_get_style_text_font(roller, LV_ROLLER_PART_SELECTED);
|
|
|
|
/*The selected text might be larger to get its size*/
|
|
if (base_font != sel_font) {
|
|
lv_coord_t letter_sp = lv_obj_get_style_text_letter_space(roller, LV_ROLLER_PART_SELECTED);
|
|
lv_coord_t line_sp = lv_obj_get_style_text_line_space(roller, LV_ROLLER_PART_SELECTED);
|
|
lv_point_t p;
|
|
_lv_txt_get_size(&p, lv_label_get_text(label), sel_font, letter_sp, line_sp, LV_COORD_MAX, LV_TXT_FLAG_NONE);
|
|
|
|
if (label_w < p.x) {
|
|
label_w = p.x;
|
|
}
|
|
}
|
|
|
|
lv_obj_set_width(roller, label_w + left + right);
|
|
}
|
|
|
|
/**
|
|
* Refresh the height of the roller and the scrollable
|
|
* @param roller pointer to roller
|
|
*/
|
|
static void refr_height(lv_obj_t *roller)
|
|
{
|
|
lv_obj_t *label = get_label(roller);
|
|
|
|
if (label == NULL) {
|
|
return;
|
|
}
|
|
|
|
lv_obj_set_height(lv_page_get_scrollable(roller), lv_obj_get_height(label) + lv_obj_get_height(roller));
|
|
|
|
#if LV_USE_ANIMATION
|
|
lv_anim_del(lv_page_get_scrollable(roller), (lv_anim_exec_xcb_t)lv_obj_set_y);
|
|
#endif
|
|
refr_position(roller, LV_ANIM_OFF);
|
|
}
|
|
|
|
/**
|
|
* Set the middle page for the roller if infinite is enabled
|
|
* @param scrl pointer to the roller's scrollable (lv_obj_t *)
|
|
*/
|
|
static void inf_normalize(void *scrl)
|
|
{
|
|
lv_obj_t *roller_scrl = (lv_obj_t *)scrl;
|
|
lv_obj_t *roller = lv_obj_get_parent(roller_scrl);
|
|
lv_roller_ext_t *ext = lv_obj_get_ext_attr(roller);
|
|
|
|
if (ext->mode == LV_ROLLER_MODE_INFINITE) {
|
|
uint16_t real_id_cnt = ext->option_cnt / LV_ROLLER_INF_PAGES;
|
|
ext->sel_opt_id = ext->sel_opt_id % real_id_cnt;
|
|
ext->sel_opt_id += (LV_ROLLER_INF_PAGES / 2) * real_id_cnt; /*Select the middle page*/
|
|
|
|
ext->sel_opt_id_ori = ext->sel_opt_id % real_id_cnt;
|
|
ext->sel_opt_id_ori += (LV_ROLLER_INF_PAGES / 2) * real_id_cnt; /*Select the middle page*/
|
|
|
|
/*Move to the new id*/
|
|
const lv_font_t *font = lv_obj_get_style_text_font(roller, LV_ROLLER_PART_BG);
|
|
lv_style_int_t line_space = lv_obj_get_style_text_line_space(roller, LV_ROLLER_PART_BG);
|
|
lv_coord_t font_h = lv_font_get_line_height(font);
|
|
lv_coord_t h = lv_obj_get_height(roller);
|
|
|
|
lv_obj_t *label = get_label(roller);
|
|
|
|
lv_coord_t line_y1 = ext->sel_opt_id * (font_h + line_space) + label->coords.y1 - roller_scrl->coords.y1;
|
|
lv_coord_t new_y = -line_y1 + (h - font_h) / 2;
|
|
lv_obj_set_y(roller_scrl, new_y);
|
|
}
|
|
}
|
|
|
|
static lv_obj_t *get_label(const lv_obj_t *roller)
|
|
{
|
|
lv_obj_t *scrl = lv_page_get_scrollable(roller);
|
|
|
|
if (scrl == NULL) {
|
|
return NULL; /*The roller is being deleted, the scrollable already not exists*/
|
|
}
|
|
|
|
return lv_obj_get_child(scrl, NULL);
|
|
}
|
|
|
|
#if LV_USE_ANIMATION
|
|
static void scroll_anim_ready_cb(lv_anim_t *a)
|
|
{
|
|
inf_normalize(a->var);
|
|
}
|
|
#endif
|
|
|
|
#endif
|