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hekate/bdk/libs/lvgl/lv_objx/lv_slider.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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/**
* @file lv_slider.c
*
*/
/*********************
* INCLUDES
*********************/
#include "lv_slider.h"
#if USE_LV_SLIDER != 0
#include "../lv_core/lv_group.h"
#include "../lv_draw/lv_draw.h"
#include "../lv_themes/lv_theme.h"
#include "../lv_misc/lv_math.h"
/*********************
* DEFINES
*********************/
#define LV_SLIDER_SIZE_MIN 4 /*hor. pad and ver. pad cannot make the bar or indicator smaller then this [px]*/
#define LV_SLIDER_NOT_PRESSED INT16_MIN
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
static bool lv_slider_design(lv_obj_t * slider, const lv_area_t * mask, lv_design_mode_t mode);
static lv_res_t lv_slider_signal(lv_obj_t * slider, lv_signal_t sign, void * param);
/**********************
* STATIC VARIABLES
**********************/
static lv_design_func_t ancestor_design_f;
static lv_signal_func_t ancestor_signal;
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
/**
* Create a slider objects
* @param par pointer to an object, it will be the parent of the new slider
* @param copy pointer to a slider object, if not NULL then the new object will be copied from it
* @return pointer to the created slider
*/
lv_obj_t * lv_slider_create(lv_obj_t * par, const lv_obj_t * copy)
{
LV_LOG_TRACE("slider create started");
/*Create the ancestor slider*/
lv_obj_t * new_slider = lv_bar_create(par, copy);
lv_mem_assert(new_slider);
if(new_slider == NULL) return NULL;
if(ancestor_design_f == NULL) ancestor_design_f = lv_obj_get_design_func(new_slider);
if(ancestor_signal == NULL) ancestor_signal = lv_obj_get_signal_func(new_slider);
/*Allocate the slider type specific extended data*/
lv_slider_ext_t * ext = lv_obj_allocate_ext_attr(new_slider, sizeof(lv_slider_ext_t));
lv_mem_assert(ext);
if(ext == NULL) return NULL;
/*Initialize the allocated 'ext' */
ext->action = NULL;
ext->drag_value = LV_SLIDER_NOT_PRESSED;
ext->style_knob = &lv_style_pretty;
ext->knob_in = 0;
/*The signal and design functions are not copied so set them here*/
lv_obj_set_signal_func(new_slider, lv_slider_signal);
lv_obj_set_design_func(new_slider, lv_slider_design);
/*Init the new slider slider*/
if(copy == NULL) {
lv_obj_set_click(new_slider, true);
lv_obj_set_protect(new_slider, LV_PROTECT_PRESS_LOST);
/*Set the default styles*/
lv_theme_t * th = lv_theme_get_current();
if(th) {
lv_slider_set_style(new_slider, LV_SLIDER_STYLE_BG, th->slider.bg);
lv_slider_set_style(new_slider, LV_SLIDER_STYLE_INDIC, th->slider.indic);
lv_slider_set_style(new_slider, LV_SLIDER_STYLE_KNOB, th->slider.knob);
} else {
lv_slider_set_style(new_slider, LV_SLIDER_STYLE_KNOB, ext->style_knob);
}
}
/*Copy an existing slider*/
else {
lv_slider_ext_t * copy_ext = lv_obj_get_ext_attr(copy);
ext->style_knob = copy_ext->style_knob;
ext->action = copy_ext->action;
ext->knob_in = copy_ext->knob_in;
/*Refresh the style with new signal function*/
lv_obj_refresh_style(new_slider);
}
LV_LOG_INFO("slider created");
return new_slider;
}
/*=====================
* Setter functions
*====================*/
/**
* Set a function which will be called when a new value is set on the slider
* @param slider pointer to slider object
* @param action a callback function
*/
void lv_slider_set_action(lv_obj_t * slider, lv_action_t action)
{
lv_slider_ext_t * ext = lv_obj_get_ext_attr(slider);
ext->action = action;
}
/**
* Set the 'knob in' attribute of a slider
* @param slider pointer to slider object
* @param in true: the knob is drawn always in the slider;
* false: the knob can be out on the edges
*/
void lv_slider_set_knob_in(lv_obj_t * slider, bool in)
{
lv_slider_ext_t * ext = lv_obj_get_ext_attr(slider);
if(ext->knob_in == in) return;
ext->knob_in = in == false ? 0 : 1;
lv_obj_invalidate(slider);
}
/**
* Set a style of a slider
* @param slider pointer to a slider object
* @param type which style should be set
* @param style pointer to a style
*/
void lv_slider_set_style(lv_obj_t * slider, lv_slider_style_t type, lv_style_t * style)
{
lv_slider_ext_t * ext = lv_obj_get_ext_attr(slider);
switch(type) {
case LV_SLIDER_STYLE_BG:
lv_bar_set_style(slider, LV_BAR_STYLE_BG, style);
break;
case LV_SLIDER_STYLE_INDIC:
lv_bar_set_style(slider, LV_BAR_STYLE_INDIC, style);
break;
case LV_SLIDER_STYLE_KNOB:
ext->style_knob = style;
lv_obj_refresh_ext_size(slider);
break;
}
}
/*=====================
* Getter functions
*====================*/
/**
* Get the value of a slider
* @param slider pointer to a slider object
* @return the value of the slider
*/
int16_t lv_slider_get_value(const lv_obj_t * slider)
{
lv_slider_ext_t * ext = lv_obj_get_ext_attr(slider);
if(ext->drag_value != LV_SLIDER_NOT_PRESSED) return ext->drag_value;
else return lv_bar_get_value(slider);
}
/**
* Get the slider action function
* @param slider pointer to slider object
* @return the callback function
*/
lv_action_t lv_slider_get_action(const lv_obj_t * slider)
{
lv_slider_ext_t * ext = lv_obj_get_ext_attr(slider);
return ext->action;
}
/**
* Give the slider is being dragged or not
* @param slider pointer to a slider object
* @return true: drag in progress false: not dragged
*/
bool lv_slider_is_dragged(const lv_obj_t * slider)
{
lv_slider_ext_t * ext = lv_obj_get_ext_attr(slider);
return ext->drag_value == LV_SLIDER_NOT_PRESSED ? false : true;
}
/**
* Get the 'knob in' attribute of a slider
* @param slider pointer to slider object
* @return true: the knob is drawn always in the slider;
* false: the knob can be out on the edges
*/
bool lv_slider_get_knob_in(const lv_obj_t * slider)
{
lv_slider_ext_t * ext = lv_obj_get_ext_attr(slider);
return ext->knob_in == 0 ? false : true;
}
/**
* Get a style of a slider
* @param slider pointer to a slider object
* @param type which style should be get
* @return style pointer to a style
*/
lv_style_t * lv_slider_get_style(const lv_obj_t * slider, lv_slider_style_t type)
{
lv_style_t * style = NULL;
lv_slider_ext_t * ext = lv_obj_get_ext_attr(slider);
switch(type) {
case LV_SLIDER_STYLE_BG:
style = lv_bar_get_style(slider, LV_BAR_STYLE_BG);
break;
case LV_SLIDER_STYLE_INDIC:
style = lv_bar_get_style(slider, LV_BAR_STYLE_INDIC);
break;
case LV_SLIDER_STYLE_KNOB:
style = ext->style_knob;
break;
default:
style = NULL;
break;
}
return style;
}
/**********************
* STATIC FUNCTIONS
**********************/
/**
* Handle the drawing related tasks of the sliders
* @param slider 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_slider_design(lv_obj_t * slider, 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 false;
}
/*Draw the object*/
else if(mode == LV_DESIGN_DRAW_MAIN) {
lv_slider_ext_t * ext = lv_obj_get_ext_attr(slider);
lv_style_t * style_bg = lv_slider_get_style(slider, LV_SLIDER_STYLE_BG);
lv_style_t * style_knob = lv_slider_get_style(slider, LV_SLIDER_STYLE_KNOB);
lv_style_t * style_indic = lv_slider_get_style(slider, LV_SLIDER_STYLE_INDIC);
lv_opa_t opa_scale = lv_obj_get_opa_scale(slider);
lv_coord_t slider_w = lv_area_get_width(&slider->coords);
lv_coord_t slider_h = lv_area_get_height(&slider->coords);
/*Draw the bar*/
lv_area_t area_bg;
lv_area_copy(&area_bg, &slider->coords);
/*Be sure at least LV_SLIDER_SIZE_MIN size will remain*/
lv_coord_t pad_ver_bg = style_bg->body.padding.ver;
lv_coord_t pad_hor_bg = style_bg->body.padding.hor;
if(pad_ver_bg * 2 + LV_SLIDER_SIZE_MIN > lv_area_get_height(&area_bg)) {
pad_ver_bg = (lv_area_get_height(&area_bg) - LV_SLIDER_SIZE_MIN) >> 1;
}
if(pad_hor_bg * 2 + LV_SLIDER_SIZE_MIN > lv_area_get_width(&area_bg)) {
pad_hor_bg = (lv_area_get_width(&area_bg) - LV_SLIDER_SIZE_MIN) >> 1;
}
if(ext->knob_in) { /*Enable extra size if the knob is inside */
area_bg.x1 += pad_hor_bg;
area_bg.x2 -= pad_hor_bg;
area_bg.y1 += pad_hor_bg;
area_bg.y2 -= pad_hor_bg;
} else { /*Let space only in the perpendicular directions*/
area_bg.x1 += slider_w < slider_h ? pad_hor_bg : 0; /*Pad only for vertical slider*/
area_bg.x2 -= slider_w < slider_h ? pad_hor_bg : 0; /*Pad only for vertical slider*/
area_bg.y1 += slider_w > slider_h ? pad_ver_bg : 0; /*Pad only for horizontal slider*/
area_bg.y2 -= slider_w > slider_h ? pad_ver_bg : 0; /*Pad only for horizontal slider*/
}
#if USE_LV_GROUP == 0
lv_draw_rect(&area_bg, mask, style_bg, lv_obj_get_opa_scale(slider));
#else
/* Draw the borders later if the bar is focused.
* At value = 100% the indicator can cover to whole background and the focused style won't be visible*/
if(lv_obj_is_focused(slider)) {
lv_style_t style_tmp;
lv_style_copy(&style_tmp, style_bg);
style_tmp.body.border.width = 0;
lv_draw_rect(&area_bg, mask, &style_tmp, opa_scale);
} else {
lv_draw_rect(&area_bg, mask, style_bg, opa_scale);
}
#endif
/*Draw the indicator*/
lv_area_t area_indic;
lv_area_copy(&area_indic, &area_bg);
/*Be sure at least ver pad/hor pad width indicator will remain*/
lv_coord_t pad_ver_indic = style_indic->body.padding.ver;
lv_coord_t pad_hor_indic = style_indic->body.padding.hor;
if(pad_ver_indic * 2 + LV_SLIDER_SIZE_MIN > lv_area_get_height(&area_bg)) {
pad_ver_indic = (lv_area_get_height(&area_bg) - LV_SLIDER_SIZE_MIN) >> 1;
}
if(pad_hor_indic * 2 + LV_SLIDER_SIZE_MIN > lv_area_get_width(&area_bg)) {
pad_hor_indic = (lv_area_get_width(&area_bg) - LV_SLIDER_SIZE_MIN) >> 1;
}
area_indic.x1 += pad_hor_indic;
area_indic.x2 -= pad_hor_indic;
area_indic.y1 += pad_ver_indic;
area_indic.y2 -= pad_ver_indic;
lv_coord_t cur_value = lv_slider_get_value(slider);
lv_coord_t min_value = lv_slider_get_min_value(slider);
lv_coord_t max_value = lv_slider_get_max_value(slider);
/*If dragged draw to the drag position*/
if(ext->drag_value != LV_SLIDER_NOT_PRESSED) cur_value = ext->drag_value;
if(slider_w >= slider_h) {
area_indic.x2 = (int32_t)((int32_t)(lv_area_get_width(&area_indic)) * (cur_value - min_value)) / (max_value - min_value);
area_indic.x2 = area_indic.x1 + area_indic.x2 - 1;
} else {
area_indic.y1 = (int32_t)((int32_t)(lv_area_get_height(&area_indic)) * (cur_value - min_value)) / (max_value - min_value);
area_indic.y1 = area_indic.y2 - area_indic.y1 + 1;
}
if(cur_value != min_value) lv_draw_rect(&area_indic, mask, style_indic, opa_scale);
/*Before the knob add the border if required*/
#if USE_LV_GROUP
/* Draw the borders later if the bar is focused.
* At value = 100% the indicator can cover to whole background and the focused style won't be visible*/
if(lv_obj_is_focused(slider)) {
lv_style_t style_tmp;
lv_style_copy(&style_tmp, style_bg);
style_tmp.body.empty = 1;
style_tmp.body.shadow.width = 0;
lv_draw_rect(&area_bg, mask, &style_tmp, opa_scale);
}
#endif
/*Draw the knob*/
lv_area_t knob_area;
lv_area_copy(&knob_area, &slider->coords);
if(slider_w >= slider_h) {
if(ext->knob_in == 0) {
knob_area.x1 = area_indic.x2 - slider_h / 2;
knob_area.x2 = knob_area.x1 + slider_h - 1;
} else {
knob_area.x1 = (int32_t)((int32_t)(slider_w - slider_h - 1) * (cur_value - min_value)) / (max_value - min_value);
knob_area.x1 += slider->coords.x1;
knob_area.x2 = knob_area.x1 + slider_h - 1;
}
knob_area.y1 = slider->coords.y1;
knob_area.y2 = slider->coords.y2;
} else {
if(ext->knob_in == 0) {
knob_area.y1 = area_indic.y1 - slider_w / 2;
knob_area.y2 = knob_area.y1 + slider_w - 1;
} else {
knob_area.y2 = (int32_t)((int32_t)(slider_h - slider_w - 1) * (cur_value - min_value)) / (max_value - min_value);
knob_area.y2 = slider->coords.y2 - knob_area.y2;
knob_area.y1 = knob_area.y2 - slider_w - 1;
}
knob_area.x1 = slider->coords.x1;
knob_area.x2 = slider->coords.x2;
}
lv_draw_rect(&knob_area, mask, style_knob, opa_scale);
}
/*Post draw when the children are drawn*/
else if(mode == LV_DESIGN_DRAW_POST) {
}
return true;
}
/**
* Signal function of the slider
* @param slider pointer to a slider 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_slider_signal(lv_obj_t * slider, lv_signal_t sign, void * param)
{
lv_res_t res;
/* Include the ancient signal function */
res = ancestor_signal(slider, sign, param);
if(res != LV_RES_OK) return res;
lv_slider_ext_t * ext = lv_obj_get_ext_attr(slider);
lv_point_t p;
lv_coord_t w = lv_obj_get_width(slider);
lv_coord_t h = lv_obj_get_height(slider);
if(sign == LV_SIGNAL_PRESSED) {
ext->drag_value = lv_slider_get_value(slider);
} else if(sign == LV_SIGNAL_PRESSING) {
lv_indev_get_point(param, &p);
int16_t tmp = 0;
if(w > h) {
lv_coord_t knob_w = h;
p.x -= slider->coords.x1 + h / 2; /*Modify the point to shift with half knob (important on the start and end)*/
tmp = (int32_t)((int32_t) p.x * (ext->bar.max_value - ext->bar.min_value + 1)) / (w - knob_w);
tmp += ext->bar.min_value;
} else {
lv_coord_t knob_h = w;
p.y -= slider->coords.y1 + w / 2; /*Modify the point to shift with half knob (important on the start and end)*/
tmp = (int32_t)((int32_t) p.y * (ext->bar.max_value - ext->bar.min_value + 1)) / (h - knob_h);
tmp = ext->bar.max_value - tmp; /*Invert the value: smaller value means higher y*/
}
if(tmp < ext->bar.min_value) tmp = ext->bar.min_value;
else if(tmp > ext->bar.max_value) tmp = ext->bar.max_value;
if(tmp != ext->drag_value) {
ext->drag_value = tmp;
lv_obj_invalidate(slider);
if(ext->action != NULL) res = ext->action(slider);
}
} else if(sign == LV_SIGNAL_RELEASED || sign == LV_SIGNAL_PRESS_LOST) {
lv_slider_set_value(slider, ext->drag_value);
ext->drag_value = LV_SLIDER_NOT_PRESSED;
if(ext->action != NULL) res = ext->action(slider);
} else if(sign == LV_SIGNAL_CORD_CHG) {
/* The knob size depends on slider size.
* During the drawing method the ext. size is used by the knob so refresh the ext. size.*/
if(lv_obj_get_width(slider) != lv_area_get_width(param) ||
lv_obj_get_height(slider) != lv_area_get_height(param)) {
slider->signal_func(slider, LV_SIGNAL_REFR_EXT_SIZE, NULL);
}
} else if(sign == LV_SIGNAL_REFR_EXT_SIZE) {
lv_style_t * style = lv_slider_get_style(slider, LV_SLIDER_STYLE_BG);
lv_style_t * knob_style = lv_slider_get_style(slider, LV_SLIDER_STYLE_KNOB);
lv_coord_t shadow_w = knob_style->body.shadow.width;
if(ext->knob_in == 0) {
/* The smaller size is the knob diameter*/
lv_coord_t x = LV_MATH_MIN(w / 2 + 1 + shadow_w, h / 2 + 1 + shadow_w);
if(slider->ext_size < x) slider->ext_size = x;
} else {
lv_coord_t pad = LV_MATH_MIN(style->body.padding.hor, style->body.padding.ver);
if(pad < 0) pad = -pad;
if(slider->ext_size < pad) slider->ext_size = pad;
if(slider->ext_size < shadow_w) slider->ext_size = shadow_w;
}
} else if(sign == LV_SIGNAL_CONTROLL) {
char c = *((char *)param);
ext->drag_value = LV_SLIDER_NOT_PRESSED;
#if USE_LV_GROUP
lv_group_t * g = lv_obj_get_group(slider);
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 && c == LV_GROUP_KEY_ENTER) {
if(editing) lv_group_set_editing(g, false);
}
#endif
if(c == LV_GROUP_KEY_RIGHT || c == LV_GROUP_KEY_UP) {
lv_slider_set_value(slider, lv_slider_get_value(slider) + 1);
if(ext->action != NULL) res = ext->action(slider);
} else if(c == LV_GROUP_KEY_LEFT || c == LV_GROUP_KEY_DOWN) {
lv_slider_set_value(slider, lv_slider_get_value(slider) - 1);
if(ext->action != NULL) res = ext->action(slider);
}
} 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_slider";
}
return res;
}
#endif
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