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lvgl/lv_objx/lv_graphbg.c
Gabor 4eb123b57e Graph bg added
2016-08-04 16:03:47 +02:00

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/**
* @file lv_graphbg.c
*
*/
/*Search an replace: graph. background -> object normal name with lower case (e.g. button, label etc.)
* graphbg -> object short name with lower case(e.g. btn, label etc)
* GRAPHBG -> object short name with upper case (e.g. BTN, LABEL etc.)
*
*/
/*********************
* INCLUDES
*********************/
#include "lv_conf.h"
#if USE_LV_GRAPHBG != 0
#include "lv_graphbg.h"
#include "lvgl/lv_draw/lv_draw.h"
/*********************
* DEFINES
*********************/
#define LV_GRAPHBG_XMIN_DEF 0
#define LV_GRAPHBG_XMAX_DEF 100
#define LV_GRAPHBG_YMIN_DEF 0
#define LV_GRAPHBG_YMAX_DEF 100
#define LV_GRAPHBG_HDIV_DEF 3
#define LV_GRAPHBG_VDIV_DEF 5
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
static bool lv_graphbg_design(lv_obj_t* obj_dp, const area_t * mask_p, lv_design_mode_t mode);
/**********************
* STATIC VARIABLES
**********************/
static bool (*ancestor_design_fp)(lv_obj_t*, const area_t *, lv_design_mode_t);
static lv_graphbgs_t lv_graphbgs_def =
{
/* Background */
.bg_rects.objs.color = COLOR_MAKE(0x60, 0x80, 0xA0),
.bg_rects.gcolor = COLOR_WHITE,
.bg_rects.bcolor = COLOR_BLACK,
.bg_rects.bwidth = 2 * LV_STYLE_MULT,
.bg_rects.bopa = 50,
.bg_rects.empty = 0,
.bg_rects.round = 4 * LV_STYLE_MULT,
.bg_rects.hpad = 10 * LV_STYLE_MULT,
.bg_rects.vpad = 15 * LV_STYLE_MULT,
.bg_rects.opad = 3 * LV_STYLE_MULT,
/* Div. line */
.div_lines.width = 1 * LV_STYLE_MULT,
.div_lines.objs.color = COLOR_BLACK,
.div_line_opa = 80,
};
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
/*-----------------
* Create function
*-----------------*/
/**
* Create a graph. background objects
* @param par_dp pointer to an object, it will be the parent of the new graph. background
* @param copy_dp pointer to a graph. background object, if not NULL then the new object will be copied from it
* @return pointer to the created graph. background
*/
lv_obj_t* lv_graphbg_create(lv_obj_t* par_dp, lv_obj_t * copy_dp)
{
/*Create the ancestor basic object*/
lv_obj_t * new_obj_dp = lv_rect_create(par_dp, copy_dp);
dm_assert(new_obj_dp);
/*Allocate the object type specific extended data*/
lv_graphbg_ext_t * ext_dp = lv_obj_alloc_ext(new_obj_dp, sizeof(lv_graphbg_ext_t));
dm_assert(ext_dp);
if(ancestor_design_fp == NULL) {
ancestor_design_fp = lv_obj_get_design_f(new_obj_dp);
}
/*Init the new graph. background object*/
if(copy_dp == NULL) {
lv_obj_set_style(new_obj_dp, &lv_graphbgs_def);
lv_obj_set_signal_f(new_obj_dp, lv_graphbg_signal);
lv_obj_set_design_f(new_obj_dp, lv_graphbg_design);
ext_dp->xmin = LV_GRAPHBG_XMIN_DEF;
ext_dp->xmax = LV_GRAPHBG_XMAX_DEF;
ext_dp->ymin = LV_GRAPHBG_YMIN_DEF;
ext_dp->ymax = LV_GRAPHBG_YMAX_DEF;
ext_dp->hdiv_num = LV_GRAPHBG_HDIV_DEF;
ext_dp->vdiv_num = LV_GRAPHBG_VDIV_DEF;
} else {
lv_graphbg_ext_t * ext_copy_dp = lv_obj_get_ext(copy_dp);
ext_dp->xmin = ext_copy_dp->xmin;
ext_dp->xmax = ext_copy_dp->xmax;
ext_dp->ymin = ext_copy_dp->ymin;
ext_dp->ymax = ext_copy_dp->ymax;
ext_dp->hdiv_num = ext_copy_dp->hdiv_num;
ext_dp->vdiv_num = ext_copy_dp->vdiv_num;
}
return new_obj_dp;
}
/**
* Signal function of the graph. background
* @param obj_dp pointer to a graph. background object
* @param sign a signal type from lv_signal_t enum
* @param param pointer to a signal specific variable
*/
bool lv_graphbg_signal(lv_obj_t* obj_dp, lv_signal_t sign, void * param)
{
bool valid;
/* Include the ancient signal function */
valid = lv_rect_signal(obj_dp, sign, param);
/* The object can be deleted so check its validity and then
* make the object specific signal handling */
if(valid != false) {
switch(sign) {
default:
break;
}
}
return valid;
}
/*=====================
* Setter functions
*====================*/
/**
* Set the number of horizontal and vertical division lines
* @param obj_dp pointer to a graph background object
* @param hdiv number of horizontal division lines
* @param vdiv number of vertical division lines
*/
void lv_graphbg_set_hvdiv(lv_obj_t * obj_dp, uint8_t hdiv, uint8_t vdiv)
{
lv_graphbg_ext_t * ext_dp = lv_obj_get_ext(obj_dp);
ext_dp->hdiv_num = hdiv;
ext_dp->vdiv_num = vdiv;
lv_obj_inv(obj_dp);
}
/**
* Set the minimal and maximal x and y values
* @param obj_dp pointer to a graph background object
* @param xmin x minimum value
* @param xmax x maximum value
* @param ymin y minimum value
* @param ymax y maximum value
*/
void lv_graphbg_set_min_max(lv_obj_t * obj_dp, int32_t xmin, int32_t xmax, int32_t ymin, int32_t ymax)
{
lv_graphbg_ext_t * ext_dp = lv_obj_get_ext(obj_dp);
ext_dp->xmin = xmin;
ext_dp->xmax = xmax;
ext_dp->ymin = ymin;
ext_dp->ymax = ymax;
}
/*=====================
* Getter functions
*====================*/
/**
* Return with a pointer to a built-in style and/or copy it to a variable
* @param style a style name from lv_graphbgs_builtin_t enum
* @param copy_p copy the style to this variable. (NULL if unused)
* @return pointer to an lv_graphbgs_t style
*/
lv_graphbgs_t * lv_graphbgs_get(lv_graphbgs_builtin_t style, lv_graphbgs_t * copy_p)
{
lv_graphbgs_t * style_p;
switch(style) {
case LV_GRAPHBGS_DEF:
style_p = &lv_graphbgs_def;
break;
default:
style_p = &lv_graphbgs_def;
}
if(copy_p != NULL) {
if(style_p != NULL) memcpy(copy_p, style_p, sizeof(lv_graphbgs_t));
else memcpy(copy_p, &lv_graphbgs_def, sizeof(lv_graphbgs_t));
}
return style_p;
}
/**********************
* STATIC FUNCTIONS
**********************/
/**
* Handle the drawing related tasks of the graph. backgrounds
* @param obj_dp 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')
* @param return true/false, depends on 'mode'
*/
static bool lv_graphbg_design(lv_obj_t* obj_dp, const area_t * mask_p, lv_design_mode_t mode)
{
if(mode == LV_DESIGN_COVER_CHK) {
/*Return false if the object is not covers the mask_p area*/
return ancestor_design_fp(obj_dp, mask_p, mode);
}
/*Draw the rectangle ancient*/
ancestor_design_fp(obj_dp, mask_p, mode);
/*Draw the object*/
lv_graphbg_ext_t * ext_dp = lv_obj_get_ext(obj_dp);
lv_graphbgs_t * style_p = lv_obj_get_style(obj_dp);
uint8_t div_i;
point_t p1;
point_t p2;
cord_t w = lv_obj_get_width(obj_dp);
cord_t h = lv_obj_get_height(obj_dp);
opa_t div_opa = (uint16_t)lv_obj_get_opa(obj_dp) * style_p->div_line_opa / 100;
cord_t x_ofs = lv_obj_get_x(obj_dp);
cord_t y_ofs = lv_obj_get_y(obj_dp);
p1.x = 0 + x_ofs;
p2.x = w + x_ofs;
for(div_i = 1; div_i <= ext_dp->hdiv_num; div_i ++) {
p1.y = (int32_t)((int32_t)h * div_i) / (ext_dp->hdiv_num + 1);
p1.y += y_ofs;
p2.y = p1.y;
lv_draw_line(&p1, &p2, mask_p, &style_p->div_lines, div_opa);
}
p1.y = 0 + y_ofs;
p2.y = h + y_ofs;
for(div_i = 1; div_i <= ext_dp->vdiv_num; div_i ++) {
p1.x = (int32_t)((int32_t)w * div_i) / (ext_dp->vdiv_num + 1);
p1.x += x_ofs;
p2.x = p1.x;
lv_draw_line(&p1, &p2, mask_p, &style_p->div_lines, div_opa);
}
return true;
}
#endif
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