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hekate/bdk/libs/lvgl/lv_objx/lv_ddlist.c
CTCaer 185526d134 Introducing Bootloader Development Kit (BDK) 
BDK will allow developers to use the full collection of drivers,
with limited editing, if any, for making payloads for Nintendo Switch.

Using a single source for everything will also help decoupling
Switch specific code and easily port it to other Tegra X1/X1+ platforms.
And maybe even to lower targets.

Everything is now centrilized into bdk folder.
Every module or project can utilize it by simply including it.

This is just the start and it will continue to improve.
2020-06-14 15:25:21 +03:00

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/*
* Copyright (c) 2019 CTCaer
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* @file lv_ddlist.c
*
*/
/*********************
* INCLUDES
*********************/
#include "lv_ddlist.h"
#if USE_LV_DDLIST != 0
#include "../lv_draw/lv_draw.h"
#include "../lv_core/lv_group.h"
#include "../lv_core/lv_indev.h"
#include "../lv_themes/lv_theme.h"
#include "../lv_misc/lv_symbol_def.h"
#include "../lv_misc/lv_anim.h"
//#include <strings.h>
/*********************
* DEFINES
*********************/
#if USE_LV_ANIMATION
# ifndef LV_DDLIST_ANIM_TIME
# define LV_DDLIST_ANIM_TIME 200 /*ms*/
# endif
#else
# undef LV_DDLIST_ANIM_TIME
# define LV_DDLIST_ANIM_TIME 0 /*No animation*/
#endif
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
static bool lv_ddlist_design(lv_obj_t * ddlist, const lv_area_t * mask, lv_design_mode_t mode);
static lv_res_t lv_ddlist_signal(lv_obj_t * ddlist, lv_signal_t sign, void * param);
static lv_res_t lv_ddlist_scrl_signal(lv_obj_t * scrl, lv_signal_t sign, void * param);
static lv_res_t lv_ddlist_release_action(lv_obj_t * ddlist);
static lv_res_t lv_ddlist_press_action(lv_obj_t * ddlist);
static void lv_ddlist_refr_size(lv_obj_t * ddlist, bool anim_en);
static void lv_ddlist_pos_current_option(lv_obj_t * ddlist);
/**********************
* STATIC VARIABLES
**********************/
static lv_signal_func_t ancestor_signal;
static lv_signal_func_t ancestor_scrl_signal;
static lv_design_func_t ancestor_design;
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
/**
* Create a drop down list objects
* @param par pointer to an object, it will be the parent of the new drop down list
* @param copy pointer to a drop down list object, if not NULL then the new object will be copied from it
* @return pointer to the created drop down list
*/
lv_obj_t * lv_ddlist_create(lv_obj_t * par, const lv_obj_t * copy)
{
LV_LOG_TRACE("drop down list create started");
/*Create the ancestor drop down list*/
lv_obj_t * new_ddlist = lv_page_create(par, copy);
lv_mem_assert(new_ddlist);
if(new_ddlist == NULL) return NULL;
if(ancestor_signal == NULL) ancestor_signal = lv_obj_get_signal_func(new_ddlist);
if(ancestor_scrl_signal == NULL) ancestor_scrl_signal = lv_obj_get_signal_func(lv_page_get_scrl(new_ddlist));
if(ancestor_design == NULL) ancestor_design = lv_obj_get_design_func(new_ddlist);
/*Allocate the drop down list type specific extended data*/
lv_ddlist_ext_t * ext = lv_obj_allocate_ext_attr(new_ddlist, sizeof(lv_ddlist_ext_t));
lv_mem_assert(ext);
if(ext == NULL) return NULL;
/*Initialize the allocated 'ext' */
ext->label = NULL;
ext->action = NULL;
ext->opened = 0;
ext->fix_height = 0;
ext->sel_opt_id = 0;
ext->sel_opt_id_ori = 0;
ext->option_cnt = 0;
ext->anim_time = LV_DDLIST_ANIM_TIME;
ext->sel_style = &lv_style_plain_color;
ext->draw_arrow = 0; /*Do not draw arrow by default*/
ext->direction_up = 0;
/*The signal and design functions are not copied so set them here*/
lv_obj_set_signal_func(new_ddlist, lv_ddlist_signal);
lv_obj_set_signal_func(lv_page_get_scrl(new_ddlist), lv_ddlist_scrl_signal);
lv_obj_set_design_func(new_ddlist, lv_ddlist_design);
/*Init the new drop down list drop down list*/
if(copy == NULL) {
lv_obj_t * scrl = lv_page_get_scrl(new_ddlist);
lv_obj_set_drag(scrl, false);
lv_page_set_scrl_fit(new_ddlist, true, true);
ext->label = lv_label_create(new_ddlist, NULL);
lv_cont_set_fit(new_ddlist, true, false);
lv_page_set_rel_action(new_ddlist, lv_ddlist_release_action);
lv_page_set_pr_action(new_ddlist, lv_ddlist_press_action);
lv_page_set_sb_mode(new_ddlist, LV_SB_MODE_DRAG);
lv_page_set_sb_mode(new_ddlist, LV_SB_MODE_HIDE);
lv_page_set_style(new_ddlist, LV_PAGE_STYLE_SCRL, &lv_style_transp_tight);
lv_ddlist_set_options(new_ddlist, "Option 1\nOption 2\nOption 3");
/*Set the default styles*/
lv_theme_t * th = lv_theme_get_current();
if(th) {
lv_ddlist_set_style(new_ddlist, LV_DDLIST_STYLE_BG, th->ddlist.bg);
lv_ddlist_set_style(new_ddlist, LV_DDLIST_STYLE_BGO, th->ddlist.bgo);
lv_ddlist_set_style(new_ddlist, LV_DDLIST_STYLE_PR, th->ddlist.pr);
lv_ddlist_set_style(new_ddlist, LV_DDLIST_STYLE_SEL, th->ddlist.sel);
lv_ddlist_set_style(new_ddlist, LV_DDLIST_STYLE_SB, th->ddlist.sb);
} else {
lv_ddlist_set_style(new_ddlist, LV_DDLIST_STYLE_BG, &lv_style_pretty);
lv_ddlist_set_style(new_ddlist, LV_DDLIST_STYLE_BGO, &lv_style_pretty);
lv_ddlist_set_style(new_ddlist, LV_DDLIST_STYLE_PR, &lv_style_pretty);
lv_ddlist_set_style(new_ddlist, LV_DDLIST_STYLE_SEL, &lv_style_plain_color);
lv_ddlist_set_style(new_ddlist, LV_DDLIST_STYLE_SB, &lv_style_pretty_color);
}
}
/*Copy an existing drop down list*/
else {
lv_ddlist_ext_t * copy_ext = lv_obj_get_ext_attr(copy);
ext->label = lv_label_create(new_ddlist, copy_ext->label);
lv_label_set_text(ext->label, lv_label_get_text(copy_ext->label));
ext->sel_opt_id = copy_ext->sel_opt_id;
ext->fix_height = copy_ext->fix_height;
ext->action = copy_ext->action;
ext->option_cnt = copy_ext->option_cnt;
ext->sel_style = copy_ext->sel_style;
ext->anim_time = copy_ext->anim_time;
ext->draw_arrow = copy_ext->draw_arrow;
/*Refresh the style with new signal function*/
lv_obj_refresh_style(new_ddlist);
}
LV_LOG_INFO("drop down list created");
return new_ddlist;
}
/*=====================
* Setter functions
*====================*/
/**
* Set arrow draw in a drop down list
* @param ddlist pointer to drop down list object
* @param en enable/disable a arrow draw. E.g. "true" for draw.
*/
void lv_ddlist_set_draw_arrow(lv_obj_t * ddlist, bool en)
{
lv_ddlist_ext_t * ext = lv_obj_get_ext_attr(ddlist);
/*Set the flag*/
ext->draw_arrow = en;
}
/**
* Set the options in a drop down list from a string
* @param ddlist pointer to drop down list object
* @param options a string with '\n' separated options. E.g. "One\nTwo\nThree"
*/
void lv_ddlist_set_options(lv_obj_t * ddlist, const char * options)
{
lv_ddlist_ext_t * ext = lv_obj_get_ext_attr(ddlist);
/*Count the '\n'-s to determine the number of options*/
ext->option_cnt = 0;
uint16_t i;
for(i = 0; options[i] != '\0'; i++) {
if(options[i] == '\n') ext->option_cnt++;
}
ext->option_cnt++; /*Last option in the at row*/
lv_label_set_text(ext->label, options);
lv_ddlist_refr_size(ddlist, false);
}
/**
* Set the selected option
* @param ddlist pointer to drop down list object
* @param sel_opt id of the selected option (0 ... number of option - 1);
*/
void lv_ddlist_set_selected(lv_obj_t * ddlist, uint16_t sel_opt)
{
lv_ddlist_ext_t * ext = lv_obj_get_ext_attr(ddlist);
if(ext->sel_opt_id == sel_opt) return;
ext->sel_opt_id = sel_opt < ext->option_cnt ? sel_opt : ext->option_cnt - 1;
ext->sel_opt_id_ori = ext->sel_opt_id;
/*Move the list to show the current option*/
if(ext->opened == 0) {
lv_ddlist_pos_current_option(ddlist);
} else {
lv_obj_invalidate(ddlist);
}
}
/**
* Set a function to call when a new option is chosen
* @param ddlist pointer to a drop down list
* @param action pointer to a call back function
*/
void lv_ddlist_set_action(lv_obj_t * ddlist, lv_action_t action)
{
lv_ddlist_ext_t * ext = lv_obj_get_ext_attr(ddlist);
ext->action = action;
}
/**
* Set the fix height for the drop down list
* If 0 then the opened ddlist will be auto. sized else the set height will be applied.
* @param ddlist pointer to a drop down list
* @param h the height when the list is opened (0: auto size)
*/
void lv_ddlist_set_fix_height(lv_obj_t * ddlist, lv_coord_t h)
{
lv_ddlist_ext_t * ext = lv_obj_get_ext_attr(ddlist);
if(ext->fix_height == h) return;
ext->fix_height = h;
lv_ddlist_refr_size(ddlist, false);
}
/**
* Enable or disable the horizontal fit to the content
* @param ddlist pointer to a drop down list
* @param en true: enable auto fit; false: disable auto fit
*/
void lv_ddlist_set_hor_fit(lv_obj_t * ddlist, bool en)
{
lv_cont_set_fit(ddlist, en, lv_cont_get_ver_fit(ddlist));
lv_page_set_scrl_fit(ddlist, en, lv_page_get_scrl_fit_ver(ddlist));
lv_ddlist_refr_size(ddlist, false);
}
/**
* Set the open/close animation time.
* @param ddlist pointer to a drop down list
* @param anim_time: open/close animation time [ms]
*/
void lv_ddlist_set_anim_time(lv_obj_t * ddlist, uint16_t anim_time)
{
lv_ddlist_ext_t * ext = lv_obj_get_ext_attr(ddlist);
#if USE_LV_ANIMATION == 0
anim_time = 0;
#endif
ext->anim_time = anim_time;
}
/**
* 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_BGO:
lv_page_set_style(ddlist, LV_PAGE_STYLE_BGO, style);
break;
case LV_DDLIST_STYLE_PR:
lv_page_set_style(ddlist, LV_PAGE_STYLE_PR, 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;
}
}
void lv_ddlist_set_align(lv_obj_t *ddlist, lv_label_align_t align)
{
lv_ddlist_ext_t * ext = lv_obj_get_ext_attr(ddlist);
lv_label_set_align(ext->label, align);
}
void lv_ddlist_set_direction_up(lv_obj_t *ddlist, bool enable)
{
lv_ddlist_ext_t * ext = lv_obj_get_ext_attr(ddlist);
ext->direction_up = enable;
}
/*=====================
* Getter functions
*====================*/
/**
* Get arrow draw in a drop down list
* @param ddlist pointer to drop down list object
*/
bool lv_ddlist_get_draw_arrow(lv_obj_t * ddlist)
{
lv_ddlist_ext_t * ext = lv_obj_get_ext_attr(ddlist);
return ext->draw_arrow;
}
/**
* Get the options of a drop down list
* @param ddlist pointer to drop down list object
* @return the options separated by '\n'-s (E.g. "Option1\nOption2\nOption3")
*/
const char * lv_ddlist_get_options(const lv_obj_t * ddlist)
{
lv_ddlist_ext_t * ext = lv_obj_get_ext_attr(ddlist);
return lv_label_get_text(ext->label);
}
/**
* Get the selected option
* @param ddlist pointer to drop down list object
* @return id of the selected option (0 ... number of option - 1);
*/
uint16_t lv_ddlist_get_selected(const lv_obj_t * ddlist)
{
lv_ddlist_ext_t * ext = lv_obj_get_ext_attr(ddlist);
return ext->sel_opt_id;
}
/**
* Get the current selected option as a string
* @param ddlist pointer to ddlist object
* @param buf pointer to an array to store the string
*/
void lv_ddlist_get_selected_str(const lv_obj_t * ddlist, char * buf)
{
lv_ddlist_ext_t * ext = lv_obj_get_ext_attr(ddlist);
uint16_t i;
uint16_t line = 0;
const char * opt_txt = lv_label_get_text(ext->label);
uint16_t txt_len = strlen(opt_txt);
for(i = 0; i < txt_len && line != ext->sel_opt_id; i++) {
if(opt_txt[i] == '\n') line ++;
}
uint16_t c;
for(c = 0; opt_txt[i] != '\n' && i < txt_len; c++, i++) buf[c] = opt_txt[i];
buf[c] = '\0';
}
/**
* Get the "option selected" callback function
* @param ddlist pointer to a drop down list
* @return pointer to the call back function
*/
lv_action_t lv_ddlist_get_action(const lv_obj_t * ddlist)
{
lv_ddlist_ext_t * ext = lv_obj_get_ext_attr(ddlist);
return ext->action;
}
/**
* Get the fix height value.
* @param ddlist pointer to a drop down list object
* @return the height if the ddlist is opened (0: auto size)
*/
lv_coord_t lv_ddlist_get_fix_height(const lv_obj_t * ddlist)
{
lv_ddlist_ext_t * ext = lv_obj_get_ext_attr(ddlist);
return ext->fix_height;
}
/**
* Get the open/close animation time.
* @param ddlist pointer to a drop down list
* @return open/close animation time [ms]
*/
uint16_t lv_ddlist_get_anim_time(const lv_obj_t * ddlist)
{
lv_ddlist_ext_t * ext = lv_obj_get_ext_attr(ddlist);
return ext->anim_time;
}
/**
* Get a style of a drop down list
* @param ddlist pointer to a drop down list object
* @param type which style should be get
* @return style pointer to a style
*/
lv_style_t * lv_ddlist_get_style(const lv_obj_t * ddlist, lv_ddlist_style_t type)
{
lv_ddlist_ext_t * ext = lv_obj_get_ext_attr(ddlist);
switch(type) {
case LV_DDLIST_STYLE_BG:
return lv_page_get_style(ddlist, LV_PAGE_STYLE_BG);
case LV_DDLIST_STYLE_BGO:
return lv_page_get_style(ddlist, LV_PAGE_STYLE_BGO);
case LV_DDLIST_STYLE_PR:
return lv_page_get_style(ddlist, LV_PAGE_STYLE_PR);
case LV_DDLIST_STYLE_SB:
return lv_page_get_style(ddlist, LV_PAGE_STYLE_SB);
case LV_DDLIST_STYLE_SEL:
return ext->sel_style;
default:
return NULL;
}
/*To avoid warning*/
return NULL;
}
lv_label_align_t lv_ddlist_get_align(const lv_obj_t *ddlist)
{
lv_ddlist_ext_t * ext = lv_obj_get_ext_attr(ddlist);
return lv_label_get_align(ext->label);
}
/*=====================
* Other functions
*====================*/
/**
* Open the drop down list with or without animation
* @param ddlist pointer to drop down list object
* @param anim_en true: use animation; false: not use animations
*/
void lv_ddlist_open(lv_obj_t * ddlist, bool anim_en)
{
#if USE_LV_ANIMATION == 0
anim_en = false;
#endif
lv_ddlist_ext_t * ext = lv_obj_get_ext_attr(ddlist);
ext->opened = 1;
lv_obj_set_drag(lv_page_get_scrl(ddlist), true);
lv_ddlist_refr_size(ddlist, anim_en);
}
/**
* Close (Collapse) the drop down list
* @param ddlist pointer to drop down list object
* @param anim_en true: use animation; false: not use animations
*/
void lv_ddlist_close(lv_obj_t * ddlist, bool anim_en)
{
#if USE_LV_ANIMATION == 0
anim_en = false;
#endif
lv_ddlist_ext_t * ext = lv_obj_get_ext_attr(ddlist);
ext->opened = 0;
lv_obj_set_drag(lv_page_get_scrl(ddlist), false);
lv_ddlist_refr_size(ddlist, anim_en);
}
/**********************
* STATIC FUNCTIONS
**********************/
/**
* Get the text alignment flag for a drop down list.
* @param ddlist drop down list
* @return text alignment flag
*/
static lv_txt_flag_t lv_ddlist_get_txt_flag(const lv_obj_t *ddlist)
{
lv_ddlist_ext_t * ext = lv_obj_get_ext_attr(ddlist);
/*The label might be already deleted so just return with some value*/
if(!ext->label) return LV_TXT_FLAG_CENTER;
lv_label_align_t align = lv_label_get_align(ext->label);
switch(align)
{
default:
case LV_LABEL_ALIGN_LEFT:
return LV_TXT_FLAG_NONE;
case LV_LABEL_ALIGN_CENTER:
return LV_TXT_FLAG_CENTER;
case LV_LABEL_ALIGN_RIGHT:
return LV_TXT_FLAG_RIGHT;
}
}
/**
* Handle the drawing related tasks of the drop down lists
* @param ddlist pointer to an object
* @param mask 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 every children are drawn
* @param return true/false, depends on 'mode'
*/
static bool lv_ddlist_design(lv_obj_t * ddlist, const lv_area_t * mask, lv_design_mode_t mode)
{
/*Return false if the object is not covers the mask_p area*/
if(mode == LV_DESIGN_COVER_CHK) {
return ancestor_design(ddlist, mask, mode);
}
/*Draw the object*/
else if(mode == LV_DESIGN_DRAW_MAIN) {
ancestor_design(ddlist, mask, mode);
lv_ddlist_ext_t * ext = lv_obj_get_ext_attr(ddlist);
lv_opa_t opa_scale = lv_obj_get_opa_scale(ddlist);
/*If the list is opened draw a rectangle under the selected item*/
if(ext->opened != 0) {
lv_style_t * style = lv_ddlist_get_style(ddlist, LV_DDLIST_STYLE_BG);
const lv_font_t * font = style->text.font;
lv_coord_t font_h = lv_font_get_height(font);
/*Draw the selected*/
lv_area_t rect_area;
rect_area.y1 = ext->label->coords.y1;
rect_area.y1 += ext->sel_opt_id * (font_h + style->text.line_space);
rect_area.y1 -= style->text.line_space / 2;
rect_area.y2 = rect_area.y1 + font_h + style->text.line_space - 1;
rect_area.x1 = ddlist->coords.x1;
rect_area.x2 = ddlist->coords.x2;
lv_draw_rect(&rect_area, mask, ext->sel_style, opa_scale);
}
}
/*Post draw when the children are drawn*/
else if(mode == LV_DESIGN_DRAW_POST) {
/*Redraw the text on the selected area with a different color*/
lv_ddlist_ext_t * ext = lv_obj_get_ext_attr(ddlist);
lv_opa_t opa_scale = lv_obj_get_opa_scale(ddlist);
/*Redraw only in opened state*/
if(ext->opened) {
lv_style_t * style = lv_ddlist_get_style(ddlist, LV_DDLIST_STYLE_BG);
const lv_font_t * font = style->text.font;
lv_coord_t font_h = lv_font_get_height(font);
lv_area_t area_sel;
area_sel.y1 = ext->label->coords.y1;
area_sel.y1 += ext->sel_opt_id * (font_h + style->text.line_space);
area_sel.y1 -= style->text.line_space / 2;
area_sel.y2 = area_sel.y1 + font_h + style->text.line_space - 1;
area_sel.x1 = ddlist->coords.x1;
area_sel.x2 = ddlist->coords.x2;
lv_area_t mask_sel;
bool area_ok;
area_ok = lv_area_intersect(&mask_sel, mask, &area_sel);
if(area_ok) {
lv_style_t * sel_style = lv_ddlist_get_style(ddlist, LV_DDLIST_STYLE_SEL);
lv_style_t new_style;
lv_style_copy(&new_style, style);
new_style.text.color = sel_style->text.color;
new_style.text.opa = sel_style->text.opa;
lv_txt_flag_t flag = lv_ddlist_get_txt_flag(ddlist);
lv_draw_label(&ext->label->coords, &mask_sel, &new_style, opa_scale,
lv_label_get_text(ext->label), flag, NULL);
}
}
/*Add a down symbol in ddlist when closed*/
else
{
/*Draw a arrow in ddlist if enabled*/
if(ext->draw_arrow)
{
lv_style_t * style = lv_ddlist_get_style(ddlist, LV_DDLIST_STYLE_BG);
const lv_font_t * font = style->text.font;
lv_style_t * sel_style = lv_ddlist_get_style(ddlist, LV_DDLIST_STYLE_BG);
lv_coord_t font_h = lv_font_get_height(font);
lv_style_t new_style;
lv_style_copy(&new_style, style);
new_style.text.color = sel_style->text.color;
new_style.text.opa = sel_style->text.opa;
lv_area_t area_arrow;
area_arrow.x2 = ddlist->coords.x2 - style->body.padding.hor;
if (!ext->direction_up)
area_arrow.x1 = area_arrow.x2 - lv_txt_get_width(SYMBOL_DOWN, strlen(SYMBOL_DOWN), sel_style->text.font, 0, 0);
else
area_arrow.x1 = area_arrow.x2 - lv_txt_get_width(SYMBOL_UP, strlen(SYMBOL_UP), sel_style->text.font, 0, 0);
area_arrow.y1 = ddlist->coords.y1 + style->text.line_space;
area_arrow.y2 = area_arrow.y1 + font_h;
lv_area_t mask_arrow;
bool area_ok;
area_ok = lv_area_intersect(&mask_arrow, mask, &area_arrow);
if (area_ok)
{
if (!ext->direction_up)
lv_draw_label(&area_arrow, &mask_arrow, &new_style, opa_scale,
SYMBOL_DOWN, LV_TXT_FLAG_NONE, NULL); /*Use a down arrow in ddlist, you can replace it with your custom symbol*/
else
lv_draw_label(&area_arrow, &mask_arrow, &new_style, opa_scale,
SYMBOL_UP, LV_TXT_FLAG_NONE, NULL); /*Use a down arrow in ddlist, you can replace it with your custom symbol*/
}
}
}
/*Draw the scrollbar in the ancestor page design function*/
ancestor_design(ddlist, mask, mode);
}
return true;
}
/**
* Signal function of the drop down list
* @param ddlist pointer to a drop down list 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_ddlist_signal(lv_obj_t * ddlist, lv_signal_t sign, void * param)
{
lv_res_t res;
/* Include the ancient signal function */
res = ancestor_signal(ddlist, sign, param);
if(res != LV_RES_OK) return res;
lv_ddlist_ext_t * ext = lv_obj_get_ext_attr(ddlist);
if(sign == LV_SIGNAL_STYLE_CHG) {
//! lv_ddlist_refr_size(ddlist, 0); // uncommented in OG
} else if(sign == LV_SIGNAL_CLEANUP) {
ext->label = NULL;
} else if(sign == LV_SIGNAL_FOCUS) {
#if USE_LV_GROUP
lv_group_t * g = lv_obj_get_group(ddlist);
bool editing = lv_group_get_editing(g);
lv_hal_indev_type_t indev_type = lv_indev_get_type(lv_indev_get_act());
/*Encoders need special handling*/
if(indev_type == LV_INDEV_TYPE_ENCODER) {
/*Open the list if editing*/
if(editing) {
ext->opened = true;
ext->sel_opt_id_ori = ext->sel_opt_id;
lv_ddlist_refr_size(ddlist, true);
}
/*Close the lift if navigating*/
else {
ext->opened = false;
ext->sel_opt_id = ext->sel_opt_id_ori;
lv_ddlist_refr_size(ddlist, true);
}
} else {
/*Open the list if closed*/
if(!ext->opened) {
ext->opened = true;
ext->sel_opt_id_ori = ext->sel_opt_id; /*Save the current value. Used to revert this state if ENER wont't be pressed*/
lv_ddlist_refr_size(ddlist, true);
}
}
#endif
} else if(sign == LV_SIGNAL_DEFOCUS) {
if(ext->opened) {
ext->opened = false;
ext->sel_opt_id = ext->sel_opt_id_ori;
lv_ddlist_refr_size(ddlist, true);
}
} else if(sign == LV_SIGNAL_CONTROLL) {
char c = *((char *)param);
if(c == LV_GROUP_KEY_RIGHT || c == LV_GROUP_KEY_DOWN) {
if(!ext->opened) {
ext->opened = 1;
lv_ddlist_refr_size(ddlist, true);
}
if(ext->sel_opt_id + 1 < ext->option_cnt) {
ext->sel_opt_id ++;
lv_ddlist_pos_current_option(ddlist);
lv_obj_invalidate(ddlist);
}
} else if(c == LV_GROUP_KEY_LEFT || c == LV_GROUP_KEY_UP) {
if(!ext->opened) {
ext->opened = 1;
lv_ddlist_refr_size(ddlist, true);
}
if(ext->sel_opt_id > 0) {
ext->sel_opt_id --;
lv_ddlist_pos_current_option(ddlist);
lv_obj_invalidate(ddlist);
}
} else if(c == LV_GROUP_KEY_ENTER) {
if(ext->opened) {
ext->sel_opt_id_ori = ext->sel_opt_id;
ext->opened = 0;
if(ext->action) ext->action(ddlist);
#if USE_LV_GROUP
lv_group_t * g = lv_obj_get_group(ddlist);
bool editing = lv_group_get_editing(g);
if(editing) lv_group_set_editing(g, false); /*In edit mode go to navigate mode if an option is selected*/
#endif
} else {
ext->opened = 1;
}
lv_ddlist_refr_size(ddlist, true);
} else if(c == LV_GROUP_KEY_ESC) {
if(ext->opened) {
ext->opened = 0;
ext->sel_opt_id = ext->sel_opt_id_ori;
lv_ddlist_refr_size(ddlist, true);
}
}
} else if(sign == LV_SIGNAL_GET_EDITABLE) {
bool * editable = (bool *)param;
*editable = true;
} 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_ddlist";
}
return res;
}
/**
* Signal function of the drop down list's scrollable part
* @param scrl pointer to a drop down list's scrollable part
* @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_ddlist_scrl_signal(lv_obj_t * scrl, lv_signal_t sign, void * param)
{
lv_res_t res;
/* Include the ancient signal function */
res = ancestor_scrl_signal(scrl, sign, param);
if(res != LV_RES_OK) return res;
lv_obj_t * ddlist = lv_obj_get_parent(scrl);
if(sign == LV_SIGNAL_REFR_EXT_SIZE) {
/* Because of the wider selected rectangle ext. size
* In this way by dragging the scrollable part the wider rectangle area can be redrawn too*/
lv_style_t * style = lv_ddlist_get_style(ddlist, LV_DDLIST_STYLE_BG);
if(scrl->ext_size < style->body.padding.hor) scrl->ext_size = style->body.padding.hor;
} else if(sign == LV_SIGNAL_CLEANUP) {
lv_ddlist_ext_t * ext = lv_obj_get_ext_attr(ddlist);
ext->label = NULL; /*The label is already deleted*/
}
return res;
}
/**
* Called when a drop down list is released to open it or set new option
* @param ddlist pointer to a drop down list object
* @return LV_ACTION_RES_INV if the ddlist it deleted in the user callback else LV_ACTION_RES_OK
*/
static lv_res_t lv_ddlist_release_action(lv_obj_t * ddlist)
{
lv_ddlist_ext_t * ext = lv_obj_get_ext_attr(ddlist);
if (!lv_obj_get_click(ddlist)) return LV_RES_OK;
if(ext->opened == 0) { /*Open the list*/
ext->opened = 1;
lv_ddlist_set_style(ddlist, LV_DDLIST_STYLE_BG, lv_ddlist_get_style(ddlist, LV_DDLIST_STYLE_BGO));
lv_obj_set_drag(lv_page_get_scrl(ddlist), true);
} else {
ext->opened = 0;
//lv_ddlist_set_style(ddlist, LV_DDLIST_STYLE_BG, lv_ddlist_get_style(ddlist, lv_ddlist_get_style(ddlist, LV_DDLIST_STYLE_PR)));
lv_obj_set_drag(lv_page_get_scrl(ddlist), false);
/*Search the clicked option*/
lv_indev_t * indev = lv_indev_get_act();
lv_point_t p;
lv_indev_get_point(indev, &p);
p.x -= ext->label->coords.x1;
p.y -= ext->label->coords.y1;
uint16_t letter_i;
letter_i = lv_label_get_letter_on(ext->label, &p);
uint16_t new_opt = 0;
const char * txt = lv_label_get_text(ext->label);
uint32_t i = 0;
uint32_t line_cnt = 0;
uint32_t letter;
for(line_cnt = 0; line_cnt < letter_i; line_cnt++) {
letter = lv_txt_encoded_next(txt, &i);
if(letter == '\n') new_opt ++;
}
ext->sel_opt_id = new_opt;
if(ext->action != NULL) {
ext->action(ddlist);
}
}
lv_ddlist_refr_size(ddlist, true);
return LV_RES_OK;
}
static lv_res_t lv_ddlist_press_action(lv_obj_t * ddlist)
{
lv_ddlist_ext_t * ext = lv_obj_get_ext_attr(ddlist);
if (!lv_obj_get_click(ddlist)) return LV_RES_OK;
if (ext->opened == 0)
{ /*Open the list*/
lv_ddlist_set_style(ddlist, LV_DDLIST_STYLE_BG, lv_ddlist_get_style(ddlist, LV_DDLIST_STYLE_PR));
}
else
{
//lv_ddlist_set_style(ddlist, LV_DDLIST_STYLE_BG, lv_ddlist_get_style(ddlist, LV_DDLIST_STYLE_BGO));
//lv_obj_set_drag(lv_page_get_scrl(ddlist), false);
///*Search the clicked option*/
//lv_indev_t * indev = lv_indev_get_act();
//lv_point_t p;
//lv_indev_get_point(indev, &p);
//p.x -= ext->label->coords.x1;
//p.y -= ext->label->coords.y1;
//uint16_t letter_i;
//letter_i = lv_label_get_letter_on(ext->label, &p);
//uint16_t new_opt = 0;
//const char * txt = lv_label_get_text(ext->label);
//uint32_t i = 0;
//uint32_t line_cnt = 0;
//uint32_t letter;
//for (line_cnt = 0; line_cnt < letter_i; line_cnt++)
//{
// letter = lv_txt_encoded_next(txt, &i);
// if (letter == '\n') new_opt++;
//}
//ext->sel_opt_id = new_opt;
//if (ext->action != NULL)
//{
// ext->action(ddlist);
//}
}
return LV_RES_OK;
}
/**
* Refresh the size of drop down list according to its status (open or closed)
* @param ddlist pointer to a drop down list object
* @param anim_en Change the size (open/close) with or without animation (true/false)
*/
static void lv_ddlist_refr_size(lv_obj_t * ddlist, bool anim_en)
{
#if USE_LV_ANIMATION == 0
anim_en = false;
#endif
lv_ddlist_ext_t * ext = lv_obj_get_ext_attr(ddlist);
lv_style_t * style = lv_obj_get_style(ddlist);
lv_coord_t new_height, full_height;
bool current_state = 0;
if(ext->opened) { /*Open the list*/
if(ext->fix_height == 0) new_height = lv_obj_get_height(lv_page_get_scrl(ddlist)) + 2 * style->body.padding.ver;
else new_height = ext->fix_height;
current_state = 1;
lv_page_set_sb_mode(ddlist, LV_SB_MODE_UNHIDE);
} else { /*Close the list*/
const lv_font_t * font = style->text.font;
lv_style_t * label_style = lv_obj_get_style(ext->label);
lv_coord_t font_h = lv_font_get_height(font);
new_height = font_h + 2 * label_style->text.line_space;
//full_height = lv_obj_get_height(lv_page_get_scrl(ddlist)) + 2 * style->body.padding.ver;
current_state = 0;
lv_page_set_sb_mode(ddlist, LV_SB_MODE_HIDE);
}
if(anim_en == 0 || ext->direction_up) {
lv_obj_set_height(ddlist, new_height);
if (ext->direction_up)
{
full_height = lv_obj_get_height(lv_page_get_scrl(ddlist)) - lv_font_get_height(style->text.font);
if (current_state)
lv_obj_set_y(ddlist, lv_obj_get_y(ddlist) - full_height);
else
lv_obj_set_y(ddlist, lv_obj_get_y(ddlist) + full_height);
}
lv_ddlist_pos_current_option(ddlist);
#if USE_LV_ANIMATION
lv_anim_del(ddlist, (lv_anim_fp_t)lv_obj_set_height); /*If an animation is in progress then it will overwrite this changes*/
} else {
lv_anim_t a;
a.var = ddlist;
a.start = lv_obj_get_height(ddlist);
a.end = new_height;
a.fp = (lv_anim_fp_t)lv_obj_set_height;
a.path = lv_anim_path_linear;
a.end_cb = (lv_anim_cb_t)lv_ddlist_pos_current_option;
a.act_time = 0;
a.time = ext->anim_time;
a.playback = 0;
a.playback_pause = 0;
a.repeat = 0;
a.repeat_pause = 0;
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);
}
#endif
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