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hekate/bdk/libs/lvgl/lv_objx/lv_roller.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_roller.c
*
*/
/*********************
* INCLUDES
*********************/
#include "lv_roller.h"
#if USE_LV_ROLLER != 0
#include "../lv_draw/lv_draw.h"
#include "../lv_core/lv_group.h"
#include "../lv_themes/lv_theme.h"
/*********************
* DEFINES
*********************/
#if USE_LV_ANIMATION
# ifndef LV_ROLLER_ANIM_TIME
# define LV_ROLLER_ANIM_TIME 200 /*ms*/
# endif
#else
# undef LV_ROLLER_ANIM_TIME
# define LV_ROLLER_ANIM_TIME 0 /*No animation*/
#endif
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
static bool lv_roller_design(lv_obj_t * roller, const lv_area_t * mask, lv_design_mode_t mode);
static lv_res_t lv_roller_scrl_signal(lv_obj_t * roller_scrl, lv_signal_t sign, void * param);
static lv_res_t lv_roller_signal(lv_obj_t * roller, lv_signal_t sign, void * param);
static void refr_position(lv_obj_t * roller, bool anim_en);
static void draw_bg(lv_obj_t * roller, const lv_area_t * mask);
/**********************
* STATIC VARIABLES
**********************/
static lv_signal_func_t ancestor_signal;
static lv_signal_func_t ancestor_scrl_signal;
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
/**
* Create a roller object
* @param par pointer to an object, it will be the parent of the new roller
* @param copy pointer to a roller object, if not NULL then the new object will be copied from it
* @return pointer to the created roller
*/
lv_obj_t * lv_roller_create(lv_obj_t * par, const lv_obj_t * copy)
{
LV_LOG_TRACE("roller create started");
/*Create the ancestor of roller*/
lv_obj_t * new_roller = lv_ddlist_create(par, copy);
lv_mem_assert(new_roller);
if(new_roller == NULL) return NULL;
if(ancestor_scrl_signal == NULL) ancestor_scrl_signal = lv_obj_get_signal_func(lv_page_get_scrl(new_roller));
if(ancestor_signal == NULL) ancestor_signal = lv_obj_get_signal_func(new_roller);
/*Allocate the roller type specific extended data*/
lv_roller_ext_t * ext = lv_obj_allocate_ext_attr(new_roller, sizeof(lv_roller_ext_t));
lv_mem_assert(ext);
if(ext == NULL) return NULL;
ext->ddlist.draw_arrow = 0; /*Do not draw arrow by default*/
/*The signal and design functions are not copied so set them here*/
lv_obj_set_signal_func(new_roller, lv_roller_signal);
lv_obj_set_design_func(new_roller, lv_roller_design);
/*Init the new roller roller*/
if(copy == NULL) {
lv_obj_t * scrl = lv_page_get_scrl(new_roller);
lv_obj_set_drag(scrl, true); /*In ddlist is might be disabled*/
lv_page_set_rel_action(new_roller, NULL); /*Roller don't uses it (like ddlist)*/
lv_page_set_scrl_fit(new_roller, true, false); /*Height is specified directly*/
lv_ddlist_open(new_roller, false);
lv_ddlist_set_anim_time(new_roller, LV_ROLLER_ANIM_TIME);
lv_roller_set_visible_row_count(new_roller, 3);
lv_label_set_align(ext->ddlist.label, LV_LABEL_ALIGN_CENTER);
lv_obj_set_signal_func(scrl, lv_roller_scrl_signal);
/*Set the default styles*/
lv_theme_t * th = lv_theme_get_current();
if(th) {
lv_roller_set_style(new_roller, LV_ROLLER_STYLE_BG, th->roller.bg);
lv_roller_set_style(new_roller, LV_ROLLER_STYLE_SEL, th->roller.sel);
} else {
/*Let the ddlist's style*/
lv_obj_refresh_style(new_roller); /*To set scrollable size automatically*/
}
}
/*Copy an existing roller*/
else {
lv_obj_t * scrl = lv_page_get_scrl(new_roller);
lv_ddlist_open(new_roller, false);
lv_obj_set_signal_func(scrl, lv_roller_scrl_signal);
lv_obj_refresh_style(new_roller); /*Refresh the style with new signal function*/
}
LV_LOG_INFO("roller created");
return new_roller;
}
/*=====================
* Setter functions
*====================*/
/**
* Set the align of the roller's options (left or center)
* @param roller - pointer to a roller object
* @param align - one of lv_label_align_t values (left, right, center)
*/
void lv_roller_set_align(lv_obj_t * roller, lv_label_align_t align)
{
lv_roller_ext_t * ext = lv_obj_get_ext_attr(roller);
lv_mem_assert(ext);
if(ext->ddlist.label == NULL) return; /*Probably the roller is being deleted if the label is NULL.*/
lv_label_set_align(ext->ddlist.label, align);
}
/**
* Set the selected option
* @param roller pointer to a roller object
* @param sel_opt id of the selected option (0 ... number of option - 1);
* @param anim_en true: set with animation; false set immediately
*/
void lv_roller_set_selected(lv_obj_t * roller, uint16_t sel_opt, bool anim_en)
{
#if USE_LV_ANIMATION == 0
anim_en = false;
#endif
if(lv_roller_get_selected(roller) == sel_opt) return;
lv_ddlist_set_selected(roller, sel_opt);
refr_position(roller, anim_en);
}
/**
* Set the height to show the given number of rows (options)
* @param roller pointer to a roller object
* @param row_cnt number of desired visible rows
*/
void lv_roller_set_visible_row_count(lv_obj_t * roller, uint8_t row_cnt)
{
lv_roller_ext_t * ext = lv_obj_get_ext_attr(roller);
lv_style_t * style_label = lv_obj_get_style(ext->ddlist.label);
uint8_t n_line_space = (row_cnt > 1) ? row_cnt - 1 : 1;
lv_ddlist_set_fix_height(roller, lv_font_get_height(style_label->text.font) * row_cnt + style_label->text.line_space * n_line_space);
}
/**
* Set a style of a roller
* @param roller pointer to a roller object
* @param type which style should be set
* @param style pointer to a style
*/
void lv_roller_set_style(lv_obj_t * roller, lv_roller_style_t type, lv_style_t * style)
{
switch(type) {
case LV_ROLLER_STYLE_BG:
lv_obj_set_style(roller, style);
break;
case LV_ROLLER_STYLE_SEL:
lv_ddlist_set_style(roller, LV_DDLIST_STYLE_SEL, style);
break;
}
}
/*=====================
* Getter functions
*====================*/
/**
* Get the align attribute. Default alignment after _create is LV_LABEL_ALIGN_CENTER
* @param roller pointer to a roller object
* @return LV_LABEL_ALIGN_LEFT, LV_LABEL_ALIGN_RIGHT or LV_LABEL_ALIGN_CENTER
*/
lv_label_align_t lv_roller_get_align(const lv_obj_t * roller)
{
lv_roller_ext_t * ext = lv_obj_get_ext_attr(roller);
lv_mem_assert(ext);
lv_mem_assert(ext->ddlist.label);
return lv_label_get_align(ext->ddlist.label);
}
/**
* Get the auto width set attribute
* @param roller pointer to a roller object
* @return true: auto size enabled; false: manual width settings enabled
*/
bool lv_roller_get_hor_fit(const lv_obj_t * roller)
{
return lv_page_get_scrl_hor_fit(roller);
}
/**
* Get a style of a roller
* @param roller pointer to a roller object
* @param type which style should be get
* @return style pointer to a style
* */
lv_style_t * lv_roller_get_style(const lv_obj_t * roller, lv_roller_style_t type)
{
switch(type) {
case LV_ROLLER_STYLE_BG:
return lv_obj_get_style(roller);
case LV_ROLLER_STYLE_SEL:
return lv_ddlist_get_style(roller, LV_DDLIST_STYLE_SEL);
default:
return NULL;
}
/*To avoid warning*/
return NULL;
}
/**********************
* STATIC FUNCTIONS
**********************/
/**
* Handle the drawing related tasks of the rollers
* @param roller 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_roller_design(lv_obj_t * roller, 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) {
draw_bg(roller, mask);
lv_style_t * style = lv_roller_get_style(roller, LV_ROLLER_STYLE_BG);
lv_opa_t opa_scale = lv_obj_get_opa_scale(roller);
const lv_font_t * font = style->text.font;
lv_roller_ext_t * ext = lv_obj_get_ext_attr(roller);
lv_coord_t font_h = lv_font_get_height(font);
lv_area_t rect_area;
rect_area.y1 = roller->coords.y1 + lv_obj_get_height(roller) / 2 - font_h / 2 - style->text.line_space / 2;
if((font_h & 0x1) && (style->text.line_space & 0x1)) rect_area.y1 --; /*Compensate the two rounding error*/
rect_area.y2 = rect_area.y1 + font_h + style->text.line_space - 1;
rect_area.x1 = roller->coords.x1;
rect_area.x2 = roller->coords.x2;
lv_draw_rect(&rect_area, mask, ext->ddlist.sel_style, opa_scale);
}
/*Post draw when the children are drawn*/
else if(mode == LV_DESIGN_DRAW_POST) {
lv_style_t * style = lv_roller_get_style(roller, LV_ROLLER_STYLE_BG);
lv_roller_ext_t * ext = lv_obj_get_ext_attr(roller);
const lv_font_t * font = style->text.font;
lv_coord_t font_h = lv_font_get_height(font);
lv_opa_t opa_scale = lv_obj_get_opa_scale(roller);
/*Redraw the text on the selected area with a different color*/
lv_area_t rect_area;
rect_area.y1 = roller->coords.y1 + lv_obj_get_height(roller) / 2 - font_h / 2 - style->text.line_space / 2;
if((font_h & 0x1) && (style->text.line_space & 0x1)) rect_area.y1 --; /*Compensate the two rounding error*/
rect_area.y2 = rect_area.y1 + font_h + style->text.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, mask, &rect_area);
if(area_ok) {
lv_style_t * sel_style = lv_roller_get_style(roller, LV_ROLLER_STYLE_SEL);
lv_style_t new_style;
lv_txt_flag_t txt_align = LV_TXT_FLAG_NONE;
{
lv_label_align_t label_align = lv_label_get_align(ext->ddlist.label);
if(LV_LABEL_ALIGN_CENTER == label_align) {
txt_align |= LV_TXT_FLAG_CENTER;
} else if(LV_LABEL_ALIGN_RIGHT == label_align) {
txt_align |= LV_TXT_FLAG_RIGHT;
}
}
lv_style_copy(&new_style, style);
new_style.text.color = sel_style->text.color;
new_style.text.opa = sel_style->text.opa;
lv_draw_label(&ext->ddlist.label->coords, &mask_sel, &new_style, opa_scale,
lv_label_get_text(ext->ddlist.label), txt_align, NULL);
}
}
return true;
}
/**
* 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;
/*Don't let the drop down list to handle the control signals. It works differently*/
if(sign != LV_SIGNAL_CONTROLL && sign != LV_SIGNAL_FOCUS && sign != LV_SIGNAL_DEFOCUS) {
/* Include the ancient signal function */
res = ancestor_signal(roller, sign, param);
if(res != LV_RES_OK) return res;
}
lv_roller_ext_t * ext = lv_obj_get_ext_attr(roller);
lv_align_t obj_align = LV_ALIGN_IN_LEFT_MID;
if(ext->ddlist.label) {
lv_label_align_t label_align = lv_label_get_align(ext->ddlist.label);
if(LV_LABEL_ALIGN_CENTER == label_align) obj_align = LV_ALIGN_CENTER;
else if(LV_LABEL_ALIGN_RIGHT == label_align) obj_align = LV_ALIGN_IN_RIGHT_MID;
}
if(sign == LV_SIGNAL_STYLE_CHG) {
lv_obj_set_height(lv_page_get_scrl(roller),
lv_obj_get_height(ext->ddlist.label) + lv_obj_get_height(roller));
lv_obj_align(ext->ddlist.label, NULL, obj_align, 0, 0);
lv_ddlist_set_selected(roller, ext->ddlist.sel_opt_id);
refr_position(roller, false);
} else if(sign == LV_SIGNAL_CORD_CHG) {
if(lv_obj_get_width(roller) != lv_area_get_width(param) ||
lv_obj_get_height(roller) != lv_area_get_height(param)) {
lv_ddlist_set_fix_height(roller, lv_obj_get_height(roller));
lv_obj_set_height(lv_page_get_scrl(roller),
lv_obj_get_height(ext->ddlist.label) + lv_obj_get_height(roller));
lv_obj_align(ext->ddlist.label, NULL, obj_align, 0, 0);
lv_ddlist_set_selected(roller, ext->ddlist.sel_opt_id);
refr_position(roller, false);
}
} else if(sign == LV_SIGNAL_FOCUS) {
#if USE_LV_GROUP
lv_group_t * g = lv_obj_get_group(roller);
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) {
/*In navigate mode revert the original value*/
if(!editing) {
if(ext->ddlist.sel_opt_id != ext->ddlist.sel_opt_id_ori) {
ext->ddlist.sel_opt_id = ext->ddlist.sel_opt_id_ori;
refr_position(roller, true);
}
}
/*Save the current state when entered to edit mode*/
else {
ext->ddlist.sel_opt_id_ori = ext->ddlist.sel_opt_id;
}
} else {
ext->ddlist.sel_opt_id_ori = ext->ddlist.sel_opt_id; /*Save the current value. Used to revert this state if ENER wont't be pressed*/
}
#endif
} else if(sign == LV_SIGNAL_DEFOCUS) {
#if USE_LV_GROUP
/*Revert the original state*/
if(ext->ddlist.sel_opt_id != ext->ddlist.sel_opt_id_ori) {
ext->ddlist.sel_opt_id = ext->ddlist.sel_opt_id_ori;
refr_position(roller, true);
}
#endif
} else if(sign == LV_SIGNAL_CONTROLL) {
char c = *((char *)param);
if(c == LV_GROUP_KEY_RIGHT || c == LV_GROUP_KEY_DOWN) {
if(ext->ddlist.sel_opt_id + 1 < ext->ddlist.option_cnt) {
lv_roller_set_selected(roller, ext->ddlist.sel_opt_id + 1, true);
}
} else if(c == LV_GROUP_KEY_LEFT || c == LV_GROUP_KEY_UP) {
if(ext->ddlist.sel_opt_id > 0) {
lv_roller_set_selected(roller, ext->ddlist.sel_opt_id - 1, true);
}
} else if(c == LV_GROUP_KEY_ENTER) {
ext->ddlist.sel_opt_id_ori = ext->ddlist.sel_opt_id; /*Set the entered value as default*/
if(ext->ddlist.action) ext->ddlist.action(roller);
#if USE_LV_GROUP
lv_group_t * g = lv_obj_get_group(roller);
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 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_roller";
}
return res;
}
/**
* Signal function of the scrollable part of the roller.
* @param roller_scrl ointer 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;
lv_indev_t * indev = lv_indev_get_act();
int32_t id = -1;
lv_obj_t * roller = lv_obj_get_parent(roller_scrl);
lv_roller_ext_t * ext = lv_obj_get_ext_attr(roller);
if(ext->ddlist.label == NULL) return LV_RES_INV; /*On delete the ddlist signal deletes the label so nothing left to do here*/
lv_style_t * style_label = lv_obj_get_style(ext->ddlist.label);
const lv_font_t * font = style_label->text.font;
lv_coord_t font_h = lv_font_get_height(font);
if(sign == LV_SIGNAL_DRAG_END) {
/*If dragged then align the list to there be an element in the middle*/
lv_coord_t label_y1 = ext->ddlist.label->coords.y1 - roller->coords.y1;
lv_coord_t label_unit = font_h + style_label->text.line_space;
lv_coord_t mid = (roller->coords.y2 - roller->coords.y1) / 2;
id = (mid - label_y1 + style_label->text.line_space / 2) / label_unit;
if(id < 0) id = 0;
if(id >= ext->ddlist.option_cnt) id = ext->ddlist.option_cnt - 1;
ext->ddlist.sel_opt_id = id;
if(ext->ddlist.action) ext->ddlist.action(roller);
} else if(sign == LV_SIGNAL_RELEASED) {
/*If picked an option by clicking then set it*/
if(!lv_indev_is_dragging(indev)) {
lv_point_t p;
lv_indev_get_point(indev, &p);
p.y = p.y - ext->ddlist.label->coords.y1;
id = p.y / (font_h + style_label->text.line_space);
if(id < 0) id = 0;
if(id >= ext->ddlist.option_cnt) id = ext->ddlist.option_cnt - 1;
ext->ddlist.sel_opt_id = id;
if(ext->ddlist.action) ext->ddlist.action(roller);
}
}
/*Position the scrollable according to the new selected option*/
if(id != -1) {
refr_position(roller, true);
}
return res;
}
/**
* Draw a rectangle which has gradient on its top and bottom
* @param roller pointer to a roller object
* @param mask pointer to the current mask (from the design function)
*/
static void draw_bg(lv_obj_t * roller, const lv_area_t * mask)
{
lv_style_t * style = lv_roller_get_style(roller, LV_ROLLER_STYLE_BG);
lv_area_t half_mask;
lv_area_t half_roller;
lv_coord_t h = lv_obj_get_height(roller);
bool union_ok;
lv_area_copy(&half_roller, &roller->coords);
half_roller.x1 -= roller->ext_size; /*Add ext size too (e.g. because of shadow draw) */
half_roller.x2 += roller->ext_size;
half_roller.y1 -= roller->ext_size;
half_roller.y2 = roller->coords.y1 + h / 2;
union_ok = lv_area_intersect(&half_mask, &half_roller, mask);
half_roller.x1 += roller->ext_size; /*Revert ext. size adding*/
half_roller.x2 -= roller->ext_size;
half_roller.y1 += roller->ext_size;
half_roller.y2 += style->body.radius;
if(union_ok) {
lv_draw_rect(&half_roller, &half_mask, style, lv_obj_get_opa_scale(roller));
}
half_roller.x1 -= roller->ext_size; /*Add ext size too (e.g. because of shadow draw) */
half_roller.x2 += roller->ext_size;
half_roller.y2 = roller->coords.y2 + roller->ext_size;
half_roller.y1 = roller->coords.y1 + h / 2;
if((h & 0x1) == 0) half_roller.y1++; /*With even height the pixels in the middle would be drawn twice*/
union_ok = lv_area_intersect(&half_mask, &half_roller, mask);
half_roller.x1 += roller->ext_size; /*Revert ext. size adding*/
half_roller.x2 -= roller->ext_size;
half_roller.y2 -= roller->ext_size;
half_roller.y1 -= style->body.radius;
if(union_ok) {
lv_color_t main_tmp = style->body.main_color;
lv_color_t grad_tmp = style->body.grad_color;
style->body.main_color = grad_tmp;
style->body.grad_color = main_tmp;
lv_draw_rect(&half_roller, &half_mask, style, lv_obj_get_opa_scale(roller));
style->body.main_color = main_tmp;
style->body.grad_color = grad_tmp;
}
}
/**
* 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 true: refresh with animation; false: without animation
*/
static void refr_position(lv_obj_t * roller, bool anim_en)
{
#if USE_LV_ANIMATION == 0
anim_en = false;
#endif
lv_obj_t * roller_scrl = lv_page_get_scrl(roller);
lv_roller_ext_t * ext = lv_obj_get_ext_attr(roller);
lv_style_t * style_label = lv_obj_get_style(ext->ddlist.label);
const lv_font_t * font = style_label->text.font;
lv_coord_t font_h = lv_font_get_height(font);
lv_coord_t h = lv_obj_get_height(roller);
int32_t id = ext->ddlist.sel_opt_id;
lv_coord_t line_y1 = id * (font_h + style_label->text.line_space) + ext->ddlist.label->coords.y1 - roller_scrl->coords.y1;
lv_coord_t new_y = - line_y1 + (h - font_h) / 2;
if(ext->ddlist.anim_time == 0 || anim_en == false) {
lv_obj_set_y(roller_scrl, new_y);
} else {
#if USE_LV_ANIMATION
lv_anim_t a;
a.var = roller_scrl;
a.start = lv_obj_get_y(roller_scrl);
a.end = new_y;
a.fp = (lv_anim_fp_t)lv_obj_set_y;
a.path = lv_anim_path_linear;
a.end_cb = NULL;
a.act_time = 0;
a.time = ext->ddlist.anim_time;
a.playback = 0;
a.playback_pause = 0;
a.repeat = 0;
a.repeat_pause = 0;
lv_anim_create(&a);
#endif
}
}
#endif
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