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lvgl/lv_objx/lv_btn.c
Gabor Kiss-Vamosi b9b735ce9f minor updates
2017-12-19 22:00:32 +01:00

388 lines
13 KiB
C
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/**
* @file lv_btn.c
*
*/
/*********************
* INCLUDES
*********************/
#include "../../lv_conf.h"
#if USE_LV_BTN != 0
#include <string.h>
#include "lv_btn.h"
#include "../lv_core/lv_group.h"
#include "../lv_draw/lv_draw.h"
#include "../lv_themes/lv_theme.h"
#include "../lv_misc/lv_area.h"
#include "../lv_misc/lv_color.h"
/*********************
* DEFINES
*********************/
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
static lv_signal_func_t ancestor_signal;
/**********************
* STATIC VARIABLES
**********************/
static lv_res_t lv_btn_signal(lv_obj_t * btn, lv_signal_t sign, void * param);
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
/**
* Create a button objects
* @param par pointer to an object, it will be the parent of the new button
* @param copy pointer to a button object, if not NULL then the new object will be copied from it
* @return pointer to the created button
*/
lv_obj_t * lv_btn_create(lv_obj_t * par, lv_obj_t * copy)
{
lv_obj_t * new_btn;
new_btn = lv_cont_create(par, copy);
lv_mem_assert(new_btn);
if(ancestor_signal == NULL) ancestor_signal = lv_obj_get_signal_func(new_btn);
/*Allocate the extended data*/
lv_btn_ext_t * ext = lv_obj_allocate_ext_attr(new_btn, sizeof(lv_btn_ext_t));
lv_mem_assert(ext);
ext->state = LV_BTN_STATE_REL;
ext->actions[LV_BTN_ACTION_PR] = NULL;
ext->actions[LV_BTN_ACTION_CLICK] = NULL;
ext->actions[LV_BTN_ACTION_LONG_PR] = NULL;
ext->actions[LV_BTN_ACTION_LONG_PR_REPEAT] = NULL;
ext->styles[LV_BTN_STATE_REL] = &lv_style_btn_rel;
ext->styles[LV_BTN_STATE_PR] = &lv_style_btn_pr;
ext->styles[LV_BTN_STATE_TGL_REL] = &lv_style_btn_tgl_rel;
ext->styles[LV_BTN_STATE_TGL_PR] = &lv_style_btn_tgl_pr;
ext->styles[LV_BTN_STATE_INA] = &lv_style_btn_ina;
ext->long_pr_action_executed = 0;
ext->toggle = 0;
lv_obj_set_signal_func(new_btn, lv_btn_signal);
/*If no copy do the basic initialization*/
if(copy == NULL) {
/*Set layout if the button is not a screen*/
if(par != NULL) {
lv_btn_set_layout(new_btn, LV_LAYOUT_CENTER);
}
lv_obj_set_click(new_btn, true); /*Be sure the button is clickable*/
/*Set the default styles*/
lv_theme_t *th = lv_theme_get_current();
if(th) {
lv_btn_set_style(new_btn, LV_BTN_STYLE_REL, th->btn.rel);
lv_btn_set_style(new_btn, LV_BTN_STYLE_PR, th->btn.pr);
lv_btn_set_style(new_btn, LV_BTN_STYLE_TGL_REL, th->btn.tgl_rel);
lv_btn_set_style(new_btn, LV_BTN_STYLE_TGL_PR, th->btn.tgl_pr);
lv_btn_set_style(new_btn, LV_BTN_STYLE_INA, th->btn.ina);
} else {
lv_obj_set_style(new_btn, ext->styles[LV_BTN_STATE_REL]);
}
}
/*Copy 'copy'*/
else {
lv_btn_ext_t * copy_ext = lv_obj_get_ext_attr(copy);
ext->state = copy_ext->state;
ext->toggle = copy_ext->toggle;
memcpy(ext->actions, copy_ext->actions, sizeof(ext->actions));
memcpy(ext->styles, copy_ext->styles, sizeof(ext->styles));
/*Refresh the style with new signal function*/
lv_obj_refresh_style(new_btn);
}
return new_btn;
}
/*=====================
* Setter functions
*====================*/
/**
* Enable the toggled states
* @param btn pointer to a button object
* @param tgl true: enable toggled states, false: disable
*/
void lv_btn_set_toggle(lv_obj_t * btn, bool tgl)
{
lv_btn_ext_t * ext = lv_obj_get_ext_attr(btn);
ext->toggle = tgl != false ? 1 : 0;
}
/**
* Set the state of the button
* @param btn pointer to a button object
* @param state the new state of the button (from lv_btn_state_t enum)
*/
void lv_btn_set_state(lv_obj_t * btn, lv_btn_state_t state)
{
lv_btn_ext_t * ext = lv_obj_get_ext_attr(btn);
if(ext->state != state) {
ext->state = state;
lv_obj_set_style(btn, ext->styles[state]);
}
}
/**
* Toggle the state of the button (ON->OFF, OFF->ON)
* @param btn pointer to a button object
*/
void lv_btn_toggle(lv_obj_t * btn)
{
lv_btn_ext_t * ext = lv_obj_get_ext_attr(btn);
switch(ext->state) {
case LV_BTN_STATE_REL: lv_btn_set_state(btn, LV_BTN_STATE_TGL_REL); break;
case LV_BTN_STATE_PR: lv_btn_set_state(btn, LV_BTN_STATE_TGL_PR); break;
case LV_BTN_STATE_TGL_REL: lv_btn_set_state(btn, LV_BTN_STATE_REL); break;
case LV_BTN_STATE_TGL_PR: lv_btn_set_state(btn, LV_BTN_STATE_PR); break;
default: break;
}
}
/**
* Set a function to call when the button event happens
* @param btn pointer to a button object
* @param action type of event form 'lv_action_t' (press, release, long press, long press repeat)
*/
void lv_btn_set_action(lv_obj_t * btn, lv_btn_action_t type, lv_action_t action)
{
if(type >= LV_BTN_ACTION_NUM) return;
lv_btn_ext_t * ext = lv_obj_get_ext_attr(btn);
ext->actions[type] = action;
}
/**
* Set a style of a button
* @param btn pointer to a button object
* @param type which style should be set
* @param style pointer to a style
*/
void lv_btn_set_style(lv_obj_t *btn, lv_btn_style_t type, lv_style_t *style)
{
lv_btn_ext_t *ext = lv_obj_get_ext_attr(btn);
switch (type) {
case LV_BTN_STYLE_REL:
ext->styles[LV_BTN_STATE_REL] = style;
break;
case LV_BTN_STYLE_PR:
ext->styles[LV_BTN_STATE_PR] = style;
break;
case LV_BTN_STYLE_TGL_REL:
ext->styles[LV_BTN_STATE_TGL_REL] = style;
break;
case LV_BTN_STYLE_TGL_PR:
ext->styles[LV_BTN_STATE_TGL_PR] = style;
break;
case LV_BTN_STYLE_INA:
ext->styles[LV_BTN_STATE_INA] = style;
break;
}
/*Refresh the object with the new style*/
lv_obj_set_style(btn, ext->styles[ext->state]);
}
/*=====================
* Getter functions
*====================*/
/**
* Get the current state of the button
* @param btn pointer to a button object
* @return the state of the button (from lv_btn_state_t enum)
*/
lv_btn_state_t lv_btn_get_state(lv_obj_t * btn)
{
lv_btn_ext_t * ext = lv_obj_get_ext_attr(btn);
return ext->state;
}
/**
* Get the toggle enable attribute of the button
* @param btn pointer to a button object
* @return ture: toggle enabled, false: disabled
*/
bool lv_btn_get_toggle(lv_obj_t * btn)
{
lv_btn_ext_t * ext = lv_obj_get_ext_attr(btn);
return ext->toggle != 0 ? true : false;
}
/**
* Get the release action of a button
* @param btn pointer to a button object
* @return pointer to the release action function
*/
lv_action_t lv_btn_get_action(lv_obj_t * btn, lv_btn_action_t type)
{
if(type >= LV_BTN_ACTION_NUM) return NULL;
lv_btn_ext_t * ext = lv_obj_get_ext_attr(btn);
return ext->actions[type];
}
/**
* Get a style of a button
* @param btn pointer to a button object
* @param type which style should be get
* @return style pointer to a style
*/
lv_style_t * lv_btn_get_style(lv_obj_t *btn, lv_btn_style_t type)
{
lv_btn_ext_t *ext = lv_obj_get_ext_attr(btn);
switch (type) {
case LV_BTN_STYLE_REL: return ext->styles[LV_BTN_STATE_REL];
case LV_BTN_STYLE_PR: return ext->styles[LV_BTN_STATE_PR];
case LV_BTN_STYLE_TGL_REL: return ext->styles[LV_BTN_STATE_TGL_REL];
case LV_BTN_STYLE_TGL_PR: return ext->styles[LV_BTN_STATE_TGL_PR];
case LV_BTN_STYLE_INA: return ext->styles[LV_BTN_STATE_INA];
default: return NULL;
}
/*To avoid warning*/
return NULL;
}
/**********************
* STATIC FUNCTIONS
**********************/
/**
* Signal function of the button
* @param btn pointer to a button 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_btn_signal(lv_obj_t * btn, lv_signal_t sign, void * param)
{
lv_res_t res;
/* Include the ancient signal function */
res = ancestor_signal(btn, sign, param);
if(res != LV_RES_OK) return res;
lv_btn_ext_t * ext = lv_obj_get_ext_attr(btn);
lv_btn_state_t state = lv_btn_get_state(btn);
bool tgl = lv_btn_get_toggle(btn);
if(sign == LV_SIGNAL_PRESSED) {
/*Refresh the state*/
if(ext->state == LV_BTN_STATE_REL) {
lv_btn_set_state(btn, LV_BTN_STATE_PR);
} else if(ext->state == LV_BTN_STATE_TGL_REL) {
lv_btn_set_state(btn, LV_BTN_STATE_TGL_PR);
}
ext->long_pr_action_executed = 0;
/*Call the press action, 'param' is the caller indev_proc*/
if(ext->actions[LV_BTN_ACTION_PR] && state != LV_BTN_STATE_INA) {
res = ext->actions[LV_BTN_ACTION_PR](btn);
}
}
else if(sign == LV_SIGNAL_PRESS_LOST) {
/*Refresh the state*/
if(ext->state == LV_BTN_STATE_PR) lv_btn_set_state(btn, LV_BTN_STATE_REL);
else if(ext->state == LV_BTN_STATE_TGL_PR) lv_btn_set_state(btn, LV_BTN_STATE_TGL_REL);
}
else if(sign == LV_SIGNAL_PRESSING) {
/*When the button begins to drag revert pressed states to released*/
if(lv_indev_is_dragging(param) != false) {
if(ext->state == LV_BTN_STATE_PR) lv_btn_set_state(btn, LV_BTN_STATE_REL);
else if(ext->state == LV_BTN_STATE_TGL_PR) lv_btn_set_state(btn, LV_BTN_STATE_TGL_REL);
}
}
else if(sign == LV_SIGNAL_RELEASED) {
/*If not dragged and it was not long press action then
*change state and run the action*/
if(lv_indev_is_dragging(param) == false && ext->long_pr_action_executed == 0) {
if(ext->state == LV_BTN_STATE_PR && tgl == false) {
lv_btn_set_state(btn, LV_BTN_STATE_REL);
} else if(ext->state == LV_BTN_STATE_TGL_PR && tgl == false) {
lv_btn_set_state(btn, LV_BTN_STATE_TGL_REL);
} else if(ext->state == LV_BTN_STATE_PR && tgl == true) {
lv_btn_set_state(btn, LV_BTN_STATE_TGL_REL);
} else if(ext->state == LV_BTN_STATE_TGL_PR && tgl == true) {
lv_btn_set_state(btn, LV_BTN_STATE_REL);
}
if(ext->actions[LV_BTN_ACTION_CLICK] && state != LV_BTN_STATE_INA) {
res = ext->actions[LV_BTN_ACTION_CLICK](btn);
}
} else { /*If dragged change back the state*/
if(ext->state == LV_BTN_STATE_PR) {
lv_btn_set_state(btn, LV_BTN_STATE_REL);
} else if(ext->state == LV_BTN_STATE_TGL_PR) {
lv_btn_set_state(btn, LV_BTN_STATE_TGL_REL);
}
}
}
else if(sign == LV_SIGNAL_LONG_PRESS) {
if(ext->actions[LV_BTN_ACTION_LONG_PR] && state != LV_BTN_STATE_INA) {
ext->long_pr_action_executed = 1;
res = ext->actions[LV_BTN_ACTION_LONG_PR](btn);
}
}
else if(sign == LV_SIGNAL_LONG_PRESS_REP) {
if(ext->actions[LV_BTN_ACTION_LONG_PR_REPEAT] && state != LV_BTN_STATE_INA) {
res = ext->actions[LV_BTN_ACTION_LONG_PR_REPEAT](btn);
}
}
else if(sign == LV_SIGNAL_CONTROLL) {
char c = *((char*)param);
if(c == LV_GROUP_KEY_RIGHT || c == LV_GROUP_KEY_UP) {
if(lv_btn_get_toggle(btn) != false) lv_btn_set_state(btn, LV_BTN_STATE_TGL_REL);
if(ext->actions[LV_BTN_ACTION_CLICK] && lv_btn_get_state(btn) != LV_BTN_STATE_INA) {
res = ext->actions[LV_BTN_ACTION_CLICK](btn);
}
} else if(c == LV_GROUP_KEY_LEFT || c == LV_GROUP_KEY_DOWN) {
if(lv_btn_get_toggle(btn) != false) lv_btn_set_state(btn, LV_BTN_STATE_REL);
if(ext->actions[LV_BTN_ACTION_CLICK] && lv_btn_get_state(btn) != LV_BTN_STATE_INA) {
res = ext->actions[LV_BTN_ACTION_CLICK](btn);
}
} else if(c == LV_GROUP_KEY_ENTER) {
if(lv_btn_get_toggle(btn) != false) {
if(state == LV_BTN_STATE_REL) lv_btn_set_state(btn, LV_BTN_STATE_TGL_REL);
else if(state == LV_BTN_STATE_PR) lv_btn_set_state(btn, LV_BTN_STATE_TGL_PR);
else if(state == LV_BTN_STATE_TGL_REL) lv_btn_set_state(btn, LV_BTN_STATE_REL);
else if(state == LV_BTN_STATE_TGL_PR) lv_btn_set_state(btn, LV_BTN_STATE_PR);
}
if(ext->actions[LV_BTN_ACTION_CLICK] && state != LV_BTN_STATE_INA) {
res = ext->actions[LV_BTN_ACTION_CLICK](btn);
}
}
}
return res;
}
#endif
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