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lvgl/lv_objx/lv_btnm.c

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/**
* @file lv_btnm.c
*
*/
/*********************
* INCLUDES
*********************/
#include "lv_conf.h"
#if USE_LV_BTNM != 0
#include "lv_btnm.h"
#include "misc/gfx/text.h"
#include "../lv_draw/lv_draw.h"
#include "../lv_obj/lv_refr.h"
/*********************
* DEFINES
*********************/
#define LV_BTNM_PR_NONE 0xFFFF
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
static bool lv_btnm_design(lv_obj_t * btnm, const area_t * mask, lv_design_mode_t mode);
static uint8_t lv_btnm_get_width_unit(const char * btn_str);
static uint16_t lv_btnm_get_btn_from_point(lv_obj_t * btnm, point_t * p);
static void lv_btnm_create_btns(lv_obj_t * btnm, const char ** map);
/**********************
* STATIC VARIABLES
**********************/
static const char * lv_btnm_def_map[] = {"Btn1","Btn2", "Btn3","\n",
"\002Btn4","Btn5", ""};
static lv_design_f_t ancestor_design_f;
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
/*-----------------
* Create function
*-----------------*/
/**
* Create a button matrix objects
* @param par pointer to an object, it will be the parent of the new button matrix
* @param copy pointer to a button matrix object, if not NULL then the new object will be copied from it
* @return pointer to the created button matrix
*/
lv_obj_t * lv_btnm_create(lv_obj_t * par, lv_obj_t * copy)
{
/*Create the ancestor object*/
lv_obj_t * new_btnm = lv_cont_create(par, copy);
dm_assert(new_btnm);
/*Allocate the object type specific extended data*/
lv_btnm_ext_t * ext = lv_obj_alloc_ext(new_btnm, sizeof(lv_btnm_ext_t));
dm_assert(ext);
ext->btn_cnt = 0;
ext->btn_pr = LV_BTNM_PR_NONE;
ext->btn_areas = NULL;
ext->cb = NULL;
ext->map_p = NULL;
ext->style_btn_rel = lv_style_get(LV_STYLE_BTN_REL, NULL);
ext->style_btn_pr = lv_style_get(LV_STYLE_BTN_PR, NULL);
if(ancestor_design_f == NULL) ancestor_design_f = lv_obj_get_design_f(new_btnm);
lv_obj_set_signal_f(new_btnm, lv_btnm_signal);
lv_obj_set_design_f(new_btnm, lv_btnm_design);
/*Init the new button matrix object*/
if(copy == NULL) {
lv_obj_set_size(new_btnm, LV_HOR_RES, LV_VER_RES / 2);
lv_obj_set_style(new_btnm, lv_style_get(LV_STYLE_PLAIN, NULL));
lv_btnm_set_map(new_btnm, lv_btnm_def_map);
}
/*Copy an existing object*/
else {
lv_btnm_ext_t * copy_ext = lv_obj_get_ext(copy);
ext->style_btn_rel = copy_ext->style_btn_rel;
ext->style_btn_pr = copy_ext->style_btn_pr;
lv_btnm_set_map(new_btnm, lv_btnm_get_map(copy));
ext->cb = copy_ext->cb;
}
return new_btnm;
}
/**
* Signal function of the button matrix
* @param btnm pointer to a button matrix object
* @param sign a signal type from lv_signal_t enum
* @param param pointer to a signal specific variable
* @return true: the object is still valid (not deleted), false: the object become invalid
*/
bool lv_btnm_signal(lv_obj_t * btnm, lv_signal_t sign, void * param)
{
bool valid;
/* Include the ancient signal function */
valid = lv_cont_signal(btnm, sign, param);
/* The object can be deleted so check its validity and then
* make the object specific signal handling */
if(valid != false) {
lv_btnm_ext_t * ext = lv_obj_get_ext(btnm);
area_t btnm_area;
area_t btn_area;
point_t p;
if(sign == LV_SIGNAL_CLEANUP) {
dm_free(ext->btn_areas);
}
else if(sign == LV_SIGNAL_STYLE_CHG || sign == LV_SIGNAL_CORD_CHG) {
lv_btnm_set_map(btnm, ext->map_p);
}
else if(sign == LV_SIGNAL_PRESSING) {
uint16_t btn_pr;
/*Search the pressed area*/
lv_dispi_get_point(param, &p);
btn_pr = lv_btnm_get_btn_from_point(btnm, &p);
/*Invalidate to old and the new areas*/;
lv_obj_get_cords(btnm, &btnm_area);
if(btn_pr != ext->btn_pr) {
lv_dispi_reset_lpr(param);
if(ext->btn_pr != LV_BTNM_PR_NONE) {
area_cpy(&btn_area, &ext->btn_areas[ext->btn_pr]);
btn_area.x1 += btnm_area.x1;
btn_area.y1 += btnm_area.y1;
btn_area.x2 += btnm_area.x1;
btn_area.y2 += btnm_area.y1;
lv_inv_area(&btn_area);
}
if(btn_pr != LV_BTNM_PR_NONE) {
area_cpy(&btn_area, &ext->btn_areas[btn_pr]);
btn_area.x1 += btnm_area.x1;
btn_area.y1 += btnm_area.y1;
btn_area.x2 += btnm_area.x1;
btn_area.y2 += btnm_area.y1;
lv_inv_area(&btn_area);
}
}
ext->btn_pr = btn_pr;
}
else if(sign == LV_SIGNAL_RELEASED || sign == LV_SIGNAL_LONG_PRESS_REP) {
if(ext->cb != NULL && ext->btn_pr != LV_BTNM_PR_NONE) {
uint16_t txt_i = 0;
uint16_t btn_i = 0;
/* Search the text of ext->btn_pr the buttons text in the map
* Skip "\n"-s*/
while(btn_i != ext->btn_pr) {
btn_i ++;
txt_i ++;
if(strcmp(ext->map_p[txt_i], "\n") == 0) txt_i ++;
}
ext->cb(btnm, txt_i);
}
if(sign == LV_SIGNAL_RELEASED && ext->btn_pr != LV_BTNM_PR_NONE) {
/*Invalidate to old area*/;
lv_obj_get_cords(btnm, &btnm_area);
area_cpy(&btn_area, &ext->btn_areas[ext->btn_pr]);
btn_area.x1 += btnm_area.x1;
btn_area.y1 += btnm_area.y1;
btn_area.x2 += btnm_area.x1;
btn_area.y2 += btnm_area.y1;
lv_inv_area(&btn_area);
ext->btn_pr = LV_BTNM_PR_NONE;
}
}
else if(sign == LV_SIGNAL_PRESS_LOST) {
ext->btn_pr = LV_BTNM_PR_NONE;
lv_obj_inv(btnm);
}
}
return valid;
}
/*=====================
* Setter functions
*====================*/
/**
* Set a new map. Buttons will be created/deleted according to the map.
* @param btnm pointer to a button matrix object
* @param map pointer a string array. The last string has to be: "".
* Use "\n" to begin a new line.
* Use octal numbers (e.g. "\003") to set the relative
* width of a button. (max. 9 -> \011)
* (e.g. const char * str[] = {"a", "b", "\n", "\004c", "d", ""}).
* The button do not copy the array so it can not be a local variable.
*/
void lv_btnm_set_map(lv_obj_t * btnm, const char ** map)
{
if(map == NULL) return;
lv_btnm_ext_t * ext = lv_obj_get_ext(btnm);
ext->map_p = map;
/*Analyze the map and create the required number of buttons*/
lv_btnm_create_btns(btnm, map);
/*Set size and positions of the buttons*/
lv_style_t * btnms = lv_obj_get_style(btnm);
cord_t max_w = lv_obj_get_width(btnm) - 2 * btnms->hpad;
cord_t max_h = lv_obj_get_height(btnm) - 2 * btnms->vpad;
cord_t act_y = btnms->vpad;
/*Count the lines to calculate button height*/
uint8_t line_cnt = 1;
uint8_t li;
for(li = 0; strlen(map[li]) != 0; li++) {
if(strcmp(map[li], "\n") == 0) line_cnt ++;
}
cord_t btn_h = max_h - ((line_cnt - 1) * btnms->opad);
btn_h = btn_h / line_cnt;
/* Count the units and the buttons in a line
* (A button can be 1,2,3... unit wide)*/
uint16_t unit_cnt; /*Number of units in a row*/
uint16_t unit_act_cnt; /*Number of units currently put in a row*/
uint16_t btn_cnt; /*Number of buttons in a row*/
uint16_t i_tot = 0; /*Act. index in the str map*/
uint16_t btn_i = 0; /*Act. index of button areas*/
const char ** map_p_tmp = map;
/*Count the units and the buttons in a line*/
while(1) {
unit_cnt = 0;
btn_cnt = 0;
/*Count the buttons in a line*/
while(strcmp(map_p_tmp[btn_cnt], "\n") != 0 &&
strlen(map_p_tmp[btn_cnt]) != 0) { /*Check a line*/
unit_cnt += lv_btnm_get_width_unit(map_p_tmp[btn_cnt]);
btn_cnt ++;
}
/*Only deal with the non empty lines*/
if(btn_cnt != 0) {
/*Calculate the width of all units*/
cord_t all_unit_w = max_w - ((btn_cnt-1) * btnms->opad);
/*Set the button size and positions and set the texts*/
uint16_t i;
cord_t act_x = btnms->hpad;
cord_t act_unit_w;
unit_act_cnt = 0;
for(i = 0; i < btn_cnt; i++) {
/* one_unit_w = all_unit_w / unit_cnt
* act_unit_w = one_unit_w * button_width
* do this two operation but the multiply first to divide a greater number */
act_unit_w = (all_unit_w * lv_btnm_get_width_unit(map_p_tmp[i])) / unit_cnt;
/*Always recalculate act_x because of rounding errors */
act_x = (unit_act_cnt * all_unit_w) / unit_cnt + i * btnms->opad + btnms->hpad;
area_set(&ext->btn_areas[btn_i], act_x,
act_y,
act_x + act_unit_w,
act_y + btn_h);
unit_act_cnt += lv_btnm_get_width_unit(map_p_tmp[i]);
i_tot ++;
btn_i ++;
}
}
act_y += btn_h + btnms->opad;
if(strlen(map_p_tmp[btn_cnt]) == 0) break; /*Break on end of map*/
map_p_tmp = &map_p_tmp[btn_cnt + 1]; /*Set the map to the next line*/
i_tot ++; /*Skip the '\n'*/
}
lv_obj_inv(btnm);
}
/**
* Set a new callback function for the buttons (It will be called when a button is released)
* @param btnm: pointer to button matrix object
* @param cb pointer to a callback function
*/
void lv_btnm_set_action(lv_obj_t * btnm, lv_btnm_callback_t cb)
{
lv_btnm_ext_t * ext = lv_obj_get_ext(btnm);
ext->cb = cb;
}
/**
* Set the styles of the buttons of the button matrox
* @param btnm pointer to a button matrix object
* @param state style in this state (LV_BTN_STATE_PR or LV_BTN_STATE_REL)
* @param style pointer to style
*/
void lv_btnm_set_styles_btn(lv_obj_t * btnm, lv_style_t * rel, lv_style_t * pr)
{
lv_btnm_ext_t * ext = lv_obj_get_ext(btnm);
ext->style_btn_rel = rel;
ext->style_btn_pr = pr;
lv_obj_inv(btnm);
}
/*=====================
* Getter functions
*====================*/
/**
* Get the current map of a button matrix
* @param btnm pointer to a button matrix object
* @return the current map
*/
const char ** lv_btnm_get_map(lv_obj_t * btnm)
{
lv_btnm_ext_t * ext = lv_obj_get_ext(btnm);
return ext->map_p;
}
/**
* Get a the callback function of the buttons on a button matrix
* @param btnm: pointer to button matrix object
* @return pointer to the callback function
*/
lv_btnm_callback_t lv_btnm_get_action(lv_obj_t * btnm)
{
lv_btnm_ext_t * ext = lv_obj_get_ext(btnm);
return ext->cb;
}
/**
* Get the style of buttons in button matrix
* @param btnm pointer to a button matrix object
* @param state style in this state (LV_BTN_STATE_PR or LV_BTN_STATE_REL)
* @return pointer the button style in the given state
*/
lv_style_t * lv_btnm_get_style_btn(lv_obj_t * btnm, lv_btn_state_t state)
{
lv_style_t * style;
lv_btnm_ext_t * ext = lv_obj_get_ext(btnm);
switch(state) {
case LV_BTN_STATE_PR:
style = ext->style_btn_pr;
break;
case LV_BTN_STATE_REL:
style = ext->style_btn_rel;
break;
default:
style = NULL;
}
if(style == NULL) style = lv_obj_get_style(btnm);
return style;
}
/**********************
* STATIC FUNCTIONS
**********************/
/**
* Handle the drawing related tasks of the button matrixs
* @param btnm pointer to a button matrix 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_btnm_design(lv_obj_t * btnm, const area_t * mask, lv_design_mode_t mode)
{
if(mode == LV_DESIGN_COVER_CHK) {
return ancestor_design_f(btnm, mask, mode);
/*Return false if the object is not covers the mask_p area*/
}
/*Draw the object*/
else if (mode == LV_DESIGN_DRAW_MAIN) {
ancestor_design_f(btnm, mask, mode);
lv_btnm_ext_t * ext = lv_obj_get_ext(btnm);
lv_style_t * btn_style;
area_t area_btnm;
area_t area_tmp;
cord_t btn_w;
cord_t btn_h;
uint16_t btn_i = 0;
uint16_t txt_i = 0;
for(btn_i = 0; btn_i < ext->btn_cnt; btn_i ++) {
lv_obj_get_cords(btnm, &area_btnm);
area_cpy(&area_tmp, &ext->btn_areas[btn_i]);
area_tmp.x1 += area_btnm.x1;
area_tmp.y1 += area_btnm.y1;
area_tmp.x2 += area_btnm.x1;
area_tmp.y2 += area_btnm.y1;
btn_w = area_get_width(&area_tmp);
btn_h = area_get_height(&area_tmp);
/*Load the style*/
btn_style = lv_btnm_get_style_btn(btnm, ext->btn_pr == btn_i ? LV_BTN_STATE_PR : LV_BTN_STATE_REL);
lv_draw_rect(&area_tmp, mask, btn_style);
/*Search the next valid text in the map*/
while(strcmp(ext->map_p[txt_i], "\n") == 0) txt_i ++;
/*Calculate the size of the text*/
const font_t * font = btn_style->font;
point_t txt_size;
txt_get_size(&txt_size, ext->map_p[txt_i], font,
btn_style->letter_space, btn_style->line_space,
area_get_width(&area_btnm), TXT_FLAG_NONE);
area_tmp.x1 += (btn_w - txt_size.x) / 2;
area_tmp.y1 += (btn_h - txt_size.y) / 2;
area_tmp.x2 = area_tmp.x1 + txt_size.x;
area_tmp.y2 = area_tmp.y1 + txt_size.y;
lv_draw_label(&area_tmp, mask, btn_style, ext->map_p[txt_i], TXT_FLAG_NONE, NULL);
txt_i ++;
}
}
return true;
}
/**
* Create the required number of buttons according to a map
* @param btnm pointer to button matrix object
* @param map_p pointer to a string array
*/
static void lv_btnm_create_btns(lv_obj_t * btnm, const char ** map)
{
/*Count the buttons in the map*/
uint16_t btn_cnt = 0;
uint16_t i = 0;
while(strlen(map[i]) != 0) {
if(strcmp(map[i], "\n") != 0) { /*Do not count line breaks*/
btn_cnt ++;
}
i++;
}
lv_btnm_ext_t * ext = lv_obj_get_ext(btnm);
if(ext->btn_areas != NULL) {
dm_free(ext->btn_areas);
ext->btn_areas = NULL;
}
ext->btn_areas = dm_alloc(sizeof(area_t) * btn_cnt);
ext->btn_cnt = btn_cnt;
}
/**
* Get the width of a button in units. It comes from the first "letter".
* @param btn_str The descriptor string of a button. E.g. "apple" or "\004banana"
* @return the width of the button in units
*/
static uint8_t lv_btnm_get_width_unit(const char * btn_str)
{
if(btn_str[0] <= '\011') return btn_str[0];
return 1;
}
static uint16_t lv_btnm_get_btn_from_point(lv_obj_t * btnm, point_t * p)
{
area_t btnm_cords;
area_t btn_area;
lv_btnm_ext_t * ext = lv_obj_get_ext(btnm);
uint16_t i;
lv_obj_get_cords(btnm, &btnm_cords);
for(i = 0; i < ext->btn_cnt; i++) {
area_cpy(&btn_area, &ext->btn_areas[i]);
btn_area.x1 += btnm_cords.x1;
btn_area.y1 += btnm_cords.y1;
btn_area.x2 += btnm_cords.x1;
btn_area.y2 += btnm_cords.y1;
if(area_is_point_on(&btn_area, p) != false) {
break;
}
}
if(i == ext->btn_cnt) i = LV_BTNM_PR_NONE;
return i;
}
#endif
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